Energy Recovery for Solvent Recovery • DEC.ULP™ | Ultra-Loop™

DEC.ULP™ | Ultra-Loop™ in Two Sentences

DEC.ULP™ | Ultra-Loop™ • how it works

• Energy Consolidation: the DEC.ULP™ process integrates heating and gas condensation within the same activated carbon regeneration phase, maximizing energy recovery.


• Increased Capacity: by optimizing the AC regeneration process, the time required for each cycle can be reduced; quicker AC regeneration cycles enable more frequent regenerations, leading to a higher per-cycle SRU capacity;


• Modular Design: the Ultra-Loop™ process features a scalable, modular design, allowing for retrofitting (RFT™) into existing Solvent Recovery Units (SRUs) to upgrade them to state-of-the-art performance.

DEC.ULP™ | Ultra-Loop™ • the best in class

DEC.ULP™ Process Architectures: DEC.THR₅™ and DEC.THR₇™

The Ultra-Loop™ energy recovery circuit is implemented in two complementary process architectures — DEC.THR₅™ and DEC.THR₇™ — which can be applied independently or in combination depending on the thermal characteristics of the installation.

DEC.THR₅™ is the core intermediate heat recovery sub-circuit. During the AC regeneration phase, hot inert gas exits the regenerating adsorber at temperatures in the range of 130–190 °C. Rather than discharging this thermal energy directly, DEC.THR₅™ routes this gas through an intermediate heat exchange stage that transfers its energy to a HTF (Heat Transfer Fluid) loop — typically a glycol/water mixture or a thermal oil circuit. This heated HTF is then used to pre-heat the cold inert gas returning from the condenser before it re-enters the main heater, raising it from approximately ~50°C to ~80–115°C. The main heater — either a fully electric heat exchanger or one fed by a TFS (Thermal Fluid System) such as a thermal oil boiler — then tops the gas up to the final regeneration temperature of 210–220°C. This intermediate gas-to-liquid-to-gas heat recovery step significantly reduces the external energy that the main heater must supply, delivering the core thermal efficiency gains of the Ultra-Loop™ process.

DEC.THR₇™ extends DEC.THR₅™ by adding a complementary thermal energy storage module. Where DEC.THR₅™ handles real-time gas-to-liquid-to-gas heat recovery, DEC.THR₇™ addresses the periods when recovered heat cannot be immediately and efficiently reused in the exchangers — for example during phases where the thermal load or timing does not align with the receiving adsorber’s needs. In these off-peak recovery windows, the additional thermal storage module accumulates the excess heat rather than letting it dissipate. This stored energy is then drawn upon when the system requires it, preventing any thermal energy from being wasted between regeneration cycles. DEC.THR₇™ therefore acts as a thermal buffer that smooths out the inherent timing mismatches of the TSA cycle, further improving the overall energy balance figure beyond what DEC.THR₅™ alone achieves.

Together, DEC.THR₅™ and DEC.THR₇™ form a two-layer thermal recovery strategy: the first captures and recirculates heat in real time; the second stores and deploys it when timing permits. This layered architecture is what enables DEC.ULP™ to achieve its verified up to 53% reduction in SRU thermal heat balance across a wide range of operating conditions.

Documented Industrial Pedigree

The first documented industrial large-scale application of DEC.ULP™ coupled with DEC.PHD™ in a Solvent Recovery Unit dates to 2008, installed in Italy on a DEC.SRU_CBS™ series unit — DEC’s large-capacity, multi-bed Solvent Recovery platform. The installation operated on a complex multi-solvent mixture of esters and alcohols, a particularly demanding application that validated the process robustness, thermal stability, and dehydration performance of the combined DEC.ULP™ + DEC.PHD™ architecture under real industrial conditions. This 2008 installation established the proof of concept at industrial scale, preceding by years any comparable competing deployment, and has since been followed by thousands of DEC SRU projects worldwide across the full SLA range from 3,000 Nm³/h to over 1,000,000 Nm³/h.

The primary objective of the DEC.ULP™ | Ultra-Loop™ process is to recover the waste heat generated during the activated carbon (AC) regeneration cycle — thermal energy that in conventional Solvent Recovery Units (SRUs) is simply discharged to atmosphere or cooling water and lost. During TSA (Temperature Swing Adsorption) regeneration, hot inert gas is circulated through the AC bed to desorb the captured solvents. This gas exits the adsorber at elevated temperature carrying significant thermal content. The Ultra-Loop™ circuit captures this energy via dedicated heat exchangers and accumulates it in thermal storage vessels, making it available for reuse in the next regeneration heating phase. The result is a closed thermal loop that drastically reduces the external energy input (fuel, or electrical heating) required to sustain the regeneration cycle, while simultaneously decoupling heat recovery from the adsorption schedule of individual beds.

A notable aspect of the previously available Energy Recovery Process (DEC.THR₃™) was the strict operational dependency between separate adsorber vessels during the regeneration process. To achieve thermal integration, this legacy design required a hot adsorber finishing its regeneration to directly preheat a cold adsorber starting its cycle. This method is createing a rigid timeline dependency, forcing at least two adsorbers out of active solvent capture service during overlapping heating, cooling, and waiting phases. In practical terms, this arrangement was restricting the available adsorption inventory, as vessels must be held or synchronized based on the thermal cycle requirements of neighboring beds rather than real time process demands.

DEC.THR₃™ seems to be delivering a shorter per-adsorber regeneration cycle because its heating and cooling phases overlap between vessels. This is technically accurate but analytically misleading. The apparent cycle-time reduction is not a genuine efficiency gain, it is an accounting artefact: the overlap is achieved by engaging a second adsorber as a thermal counterpart, removing it from adsorption service for the duration. In a plain sequential system with no heat recovery, each adsorber completes its full cycle independently and returns to service without affecting any other vessel. In the DEC.THR₃™ system, the cycle appears shorter per adsorber because phases are overlapped — but the overlap borrows another adsorber’s availability to achieve it. The net adsorption capacity of the plant is reduced, not increased: fewer adsorbers are available for VOC capture during those overlapping phases. DEC.ULP™ | Ultra-Loop™ eliminates this trade-off entirely. Because heat recovery is handled by dedicated exchangers and thermal storage vessels — not by a parallel adsorber — each bed is free to enter and exit regeneration based solely on its own solvent saturation level, with no dependency on any neighbouring vessel’s thermal state. The full adsorption inventory remains available for service at all times.

By contrast, combined Energy Recovery Systems (ERS) developed by DEC, such as the DEC.THR₁™, DEC.THR₅™ and DEC.THR₇™ architectures, decouple the heat recovery loop from the active adsorption cycle. By employing dedicated heat recovery equipment and thermal energy accumulation vessels, DEC.ULP™ captures, stores, and reuses thermal energy independently. This allows the adsorption beds to be managed strictly according to their actual solvent loading and breakthrough parameters. This process independence provides several critical operational advantages for the BUYER:

• Optimized Adsorbent Utilization: regeneration cycles are initiated solely when an individual adsorber has reached its targeted solvent saturation, ensuring maximum efficiency of the carbon bed inventory. In systems governed by multi bed synchronization, such as DEC.THR₃™, operators may be forced to initiate regeneration prematurely to satisfy the heat exchange requirements of a parallel vessel, which reduces overall plant productivity.


• Enhanced Process Safety and Media Integrity: the DEC.THR₃™ explicitly introduces a "waiting phase" where a completely regenerated adsorber remains isolated at temperatures up to approximately 180-190°C while awaiting thermal synchronization with another bed. Sustaining activated carbon beds in a stagnant, high temperature condition for extended periods complicates safety management and increases risks when handling unstable volatile organic compounds (e.g. Ketones); DEC.ULP™ decoupled thermal storage eliminates these hazardous waiting modes completely.

Pressure Drop and Energy Consumption Considerations

The DEC.THR₃™ legacy process configuration requires the regeneration fan to force the inert gas stream through multiple adsorption beds in series during the heat exchange phases. Each adsorber contains a dense activated carbon layer with a typical thickness between 0.8 and 1.3 meters. Forcing gas through multiple beds simultaneously creates a compounding pressure drop that requires significantly higher fan brake horsepower (BHP). This increased mechanical resistance directly drives up electrical energy consumption throughout the full operating cycle.

In contrast, DEC.ULP™ | Ultra-Loop™ technology utilizes dedicated heat recovery exchangers engineered specifically for high efficiency gas to liquid heat transfer with minimal flow resistance. The pressure drop across an Ultra-Loop™ exchanger is a fraction of the resistance generated by an active, carbon bed layer. Consequently, the electrical energy required to circulate regeneration gas through dedicated heat recovery circuit is substantially lower than the energy demanded by the multi-bed series routing of DEC.THR₃™ design. Because electrical energy typically represents a higher value operating cost than low grade recovered heat, reducing fan power consumption provides a far superior total cost of ownership (TCO) for the Customer.

Mechanical Simplicity — The True Structural Cost of DEC.THR₃™

The mechanical complexity gap between DEC.ULP™ | Ultra-Loop™ and DEC.THR₃™-derived configurations is far larger than it appears on a process flow diagram. Two structural penalties are built into the DEC.THR₃™ architecture by design and cannot be engineered away — they are consequences of its fundamental operating principle.

Penalty 1 — Multi-Bed Footprint Inflation: The Extra Vessel Burden

Because DEC.THR₃™ relies on tight internal phase overlapping to trade thermal energy directly between adsorber beds, it cannot run an efficient and continuous recovery cycle on a baseline two-bed SRU configuration. To achieve continuous solvent processing while beds are simultaneously pre-heating and pre-cooling each other, the process requires adding an extra adsorber vessel dedicated to enabling the heat-exchange overlap.

This is not a minor addition. An adsorber vessel for industrial solvent recovery is a massive, heavy, pressure-rated, jacketed process vessel packed with several tonnes of activated carbon. Adding one creates an immediate and unavoidable structural cascade:

• Dramatically increased plant footprint: overall layout dimensions grow not just by the vessel diameter, but by the clearance, access, maintenance, and interconnection space around it.


• Higher dynamic floor loading: the combined deadweight of the vessel shell, internals, AC charge, and process gas creates a significant structural load that must be accounted for in foundation design and floor slab specification.


• Increased foundation and structural requirements: particularly critical for skid-mounted systems (DEC.SRU_SMS™) or installations in existing buildings with load-rated floors, where adding a full carbon vessel may be structurally impossible or require expensive civil engineering works.

Penalty 2 — The Heavy Valve and High-Temperature Manifold Matrix

Because the DEC.THR₃™ system is constantly routing hot inert gas from bed to bed across six tightly sequenced phases to capture and transfer heat, the process piping network becomes exceptionally complex. This is not a design choice — it is an unavoidable consequence of using the gas stream itself as the heat transfer medium between vessels.

• Large-diameter, high-temperature ducting congestion: the system requires massive cross-connecting ducts — typically 400–600 mm diameter or larger — routed over, under, and around the vessel array to allow rapid, high-volume gas transfers between adjacent beds. On a skid or in a constrained plant building, this ductwork consumes significant three-dimensional space and complicates layout design, maintenance access, and structural routing.


• Heavy-duty, high-temperature ATEX valve matrix: because the regeneration gas is cycling at temperatures typically in the range of 180–200 °C, standard industrial dampers are insufficient. The system requires a matrix of heavy-duty, high-temperature pneumatic ATEX-rated valves — each with substantial body weight, high-torque actuators, and thermal expansion requirements. These are not off-the-shelf components; they are specialist, expensive, and maintenance-intensive items.


• Structural steel scaffolding just for valve support: the pneumatic actuators require clearance for stroke, maintenance, and replacement. The valve bodies and ductwork generate thermal expansion forces that must be absorbed by the supporting structure to prevent fatigue cracking at duct welds and flange connections. Heavy structural steelwork — brackets, frames, and expansion loops — is required purely to support this valve and duct matrix, adding weight, cost, and complexity before a single litre of solvent has been recovered.

Penalty 3 — Maintenance Complexity and Operational Safety: The Valve Sequence Trap

The consequences of adding numerous heavy, high-temperature ATEX valves extend well beyond installation cost and structural weight. In operation, each valve in a DEC.THR₃™-derived system is an active participant in a precisely timed, six-phase regeneration sequence. Every phase transition depends on a specific set of valves opening and closing in the correct order, at the correct moment, at temperatures up to 200 °C, with inert gas flows carrying solvent-laden vapour at elevated pressure. This is not a forgiving environment for mechanical components.

• Any single valve failure cascades through the entire sequence: because each regeneration phase is thermally and pneumatically coupled to the next, a fault in one valve — a stuck actuator, a seat leak, a positioner failure, a sensor drift — does not produce a local process deviation. It breaks the sequence. The entire bed-to-bed heat transfer choreography collapses. The plant either trips on a safety interlock or, worse, continues operating in a degraded and unintended thermal state that the control system may not immediately detect. In a tight phase-coupled system, one valve fault is a plant-wide event.


• Fault diagnosis is extraordinarily difficult: when the sequence fails, identifying which of the numerous ATEX valves in the matrix is responsible requires isolating hot, pressurised, solvent-laden circuits while the plant is either running degraded or shut down. The diagnostic process involves cross-referencing valve position feedback, actuator pressure, positioner signals, and thermal profile data across multiple interacting beds simultaneously. This is technically demanding, time-consuming, and hazardous work in an ATEX zone.


• Maintenance access is inherently constrained: the valves are large, heavy, and installed on high-temperature ductwork elevated above and between massive vessel bodies. Accessing them for inspection, actuator replacement, or seat maintenance requires scaffolding or platform access in a live process environment — within an ATEX-classified zone, with hot surfaces, potentially solvent-containing gas, and confined space conditions around the vessel skirt areas.


• Spare parts burden and lead times: high-temperature ATEX-rated pneumatic valves for large duct diameters are specialist components with extended manufacturing and delivery lead times. Maintaining adequate spare parts inventory for a full valve matrix represents a significant capital commitment. A single unexpected valve failure without an available spare can mean an extended plant shutdown while a replacement is sourced and installed.


• Cumulative wear amplifies risk over time: every thermal cycle — of which there are dozens per day in continuous SRU operation — subjects each valve seat, stem seal, and actuator to a thermal expansion and contraction cycle at high temperature in the presence of solvent vapours. Over months and years of operation, seat wear, stem packing degradation, and actuator fatigue accumulate. In a matrix of numerous valves all subject to the same wear regime, the statistical probability of a sequence-disrupting failure grows substantially with operating hours.

The operational reality is straightforward: the more valves in the sequence, the more single points of failure exist, the harder diagnosis becomes, and the more expensive and hazardous maintenance is. DEC.ULP™ | Ultra-Loop™ eliminates this problem class entirely. Because heat transfer is handled by a closed liquid circuit — not by routing hot solvent-laden gas through a matrix of pneumatic ATEX valves — the Ultra-Loop™ circuit has no high-temperature gas valves in its energy recovery path. The thermal storage circuit operates with standard, low-maintenance liquid-side isolation and control valves that are accessible, replaceable with standard components, and completely outside the ATEX gas-phase process boundary.

DEC.ULP™ Design Philosophy: The Structural Alternative

DEC.ULP™ | Ultra-Loop™ eliminates both penalties by a single architectural decision: heat is captured out of the regeneration gas stream into a localised, compact, gas-to-liquid heat exchanger — not routed through another carbon vessel. This one change resolves the entire mechanical complexity cascade:

• No extra process vessels: DEC.ULP™ achieves its energy savings without adding an extra carbon vessel or rewriting the core bed-to-bed process sequence. It operates on a standard lean bed configuration. No additional foundation loading, no extra vessel civil works, no additional AC inventory.


• Standard process piping, not a high-temperature gas manifold: because heat transfer occurs in a localised gas-to-liquid exchanger, the massive high-temperature gas ducting network and its associated ATEX valve matrix are completely bypassed. The SRU process piping remains straightforward and maintainable.


• Compact liquid utility lines instead of bulk gas ducting: instead of routing 400–600 mm high-temperature gas ducts across the skid structure, DEC.ULP™ transfers thermal energy using small, lightweight, insulated liquid utility pipes — typically 2” to 4” lines — connecting the heat exchanger to a compact, integrated fluid storage module. These lines occupy a fraction of the structural space, impose negligible deadweight, and require no specialist ATEX valve gear or thermal expansion scaffolding.

The structural result is a process that makes far more sense for space-constrained installations, retrofit projects, and skid-mounted configurations (DEC.SRU_SMS™): fewer vessels, no high-temperature gas manifold, no heavy valve matrix, and energy transfer handled by compact insulated liquid lines. DEC.ULP™ delivers superior thermal recovery performance from a fraction of the mechanical footprint.

Water Management: DEC.PHD™ — Pulse Heat Dehydration / Pulse Heat Desorption

Water removal from the regeneration gas stream is handled by DEC.PHD™ (Pulse Heat Dehydration, alternatively Pulse Heat Desorption) — DEC's best-in-class water-separation process and a core component of all DEC activated carbon Solvent Recovery Units, proven on hundreds of successful SRU installations worldwide. DEC.PHD™ operates via an intelligent selective desorption algorithm (DEC.SDA™) that controls the desorption of water and solvent from the activated carbon independently, minimising the quantity of water that reaches the condensation stage alongside the recovered solvent.

This approach eliminates the need to condense or freeze adsorbed water entirely, removing any defrosting phase, which in conventional BCS-equipped SRUs constitutes a dead time: the condenser is unavailable for solvent condensation during the defrost cycle, reducing effective plant throughput, from the refrigeration circuit. The energy implications are significant: water typically accounts for 5–10% of the condensed stream by mass under conventional operation, yet condensing or freezing water requires disproportionately more energy than condensing a typical organic solvent (e.g. Ethyl Acetate) at equivalent mass. DEC.PHD™ eliminates this thermal penalty at source, reducing water content in the condensed stream to average values below 1%.

This has a cascading consequence that is often underappreciated: because no water is condensed in the process, there is no water to treat, dispose of, nebulise, or re-evaporate. In conventional SRUs without DEC.PHD™, the condensed water recovered alongside the solvent must be managed as a process waste stream — typically through one of several costly and energy-intensive options: wastewater treatment and disposal, controlled nebulisation/atomisation back into the process gas, or re-evaporation circuits. Each of these alternatives requires additional equipment, additional energy consumption, additional maintenance, and in the case of wastewater disposal, additional regulatory compliance burden. DEC.PHD™ eliminates all of these secondary circuits and their associated costs entirely. The result is a process that is not only more energy-efficient, but simpler, lighter, less expensive to build and operate, and free of the auxiliary water-handling infrastructure that burdens conventional SRU designs.

Optimised Condensation Temperature and Chiller COP

Thanks to gas-phase dehydration (DEC.PHD™) coupled with the resulting compactness of the regeneration circuit equipped with DEC.ULP™, solvent condensation can occur at relatively higher temperatures — typically at −12 °C, with no need to reach −25 °C as required by less efficient configurations. This is because the residual solvent mass remaining in the regeneration gas at equilibrium concentration is fully readsorbed by the activated carbon immediately downstream and is negligible from a recovery standpoint.

Operating the chiller at −12 °C instead of −25 °C yields a substantially higher Coefficient of Performance (COP), directly minimising the electrical energy demand for refrigeration. The combination of DEC.PHD™ water elimination and Ultra-Loop™ compact circuit geometry therefore delivers a doubly optimised refrigeration load: less water to handle and a higher condensation temperature set-point — both contributing independently and cumulatively to reduced energy consumption and operating cost.

Technical Implications

From a process engineering perspective, utilizing an adsorber as a direct heat exchange element introduces excessive system constraints and links independent process stages together. While DEC.THR₃™) has demonstrated one method of thermal integration, it binds the plant to a rigid, highly sensitive sequence of interconnected steps. DEC.ULP™ | Ultra-Loop™ represents the alternative architecture employing dedicated heat exchangers and automated thermal storage loops achieving equivalent thermal energy recovery metrics while ensuring that 100% of the available adsorption capacity remains responsive to actual VOC load fluctuations, keeping electrical energy consumption and pressure drops low and maintaining maximum operational flexibility for the Customer.

CO₂ Reduction and Decarbonization

By recovering and reusing waste heat that would otherwise be discharged as losses from the regeneration cycle, DEC.ULP™ | Ultra-Loop™ directly reduces the external energy input required to sustain the TSA process, primarily fuel consumption for heating and electrical energy for refrigeration. Every unit of waste heat recovered displaces an equivalent unit of primary energy that would otherwise need to be generated from combustion or grid electricity, translating directly into a measurable reduction in CO₂ emissions at plant level.

The decarbonization impact of DEC.ULP™ operates on two complementary axes:

• Direct CO₂ reduction from fuel savings: a reduction of up to 53% in the SRU thermal heat balance means a proportional reduction in fuel — typically natural gas — consumed for regeneration heating. For an industrial-scale SRU operating continuously, this translates to measurable tonnes of CO₂ avoided per year, contributing directly to Scope 1 emission reduction targets.


• Indirect CO₂ reduction from electrical savings: lower fan brake horsepower (BHP), due to dedicated low-resistance heat exchangers replacing multi-bed series routing, and higher chiller COP, enabled by DEC.PHD™ gas-phase dehydration and condensation at −12°C instead of much lower tempartures (e.g. −25°C), both reduce grid electricity consumption, lowering Scope 2 emissions from purchased power.


• Alignment with industrial decarbonization frameworks: DEC.ULP™ supports compliance with EU ETS (Emissions Trading System), Industrial Emissions Directive (IED), and corporate net-zero commitments by delivering verified, quantifiable energy and emission reductions on existing or new SRU infrastructure, with no process compromise and full retrofit compatibility.

In industrial solvent recovery, where regeneration cycles run continuously around the clock, the cumulative annual CO₂ savings enabled by DEC.ULP™ are substantial. When combined with solvent reclaiming and reuse — which avoids the manufacture of virgin solvent and associated upstream emissions — the DEC.ULP™-equipped SRU represents one of the highest-impact decarbonization measures available to industries operating gas-phase solvent processes.

DEC.ULP™ | Ultra-Loop™ • key benefits

DEC.ULP™ is the "best in class" innovative process allowing for faster AC regeneration cycles, boosting Solvent Recovery capacity and reducing operating costs:

• Energy Savings: reduced thermal energy consumption, lower electricity usage, decreased fuel (e.g. natural gas) consumption during the solvent regeneration process;


• Environmental Sustainability: the Ultra-Loop™ technology contributes to a more eco-friendly process due to lower energy consumption, resulting in reduced CO₂ emissions, a reduced environmental impact and promoting the circular economy and sustainable goals;


• Increased Efficiency: DEC.ULP™ optimizes production processes, facilitating a faster return on investment (ROI);


• Compliance: boosting efficiency helps industries meet strict environmental regulations pertaining to industrial VOCs' emissions.

DEC.ULP™ | Ultra-Loop™ • reduced Energy Consumption

The DEC.ULP™ eco-friendly process configuration can deliver up to a remarkable up to 53% reduction (depending on the selected configuration matrix) in the thermal heat balance of the Solvent Recovery Units (SRU), with an additional 55% reduction in cooling energy and up to 49% CO₂ reduction (Scope 1 & 2 combined), translating into substantial energy savings, decarbonization, and increased process efficiency. This proven technology demonstrates DEC’s continuous pursuit of enhanced energy efficiency and sustainability in SRU processes, paving the way for circular economy and cost-effective Solvent Recovery solutions.

At the heart of Ultra-Loop™ lies a unique combination of THR_x™ processes applied activated carbon (AC) and hot nitrogen regeneration DEC.RSG™ TSA process, a revolutionary technique that utilizes the inherent properties of AC to effectively remove solvents from contaminated streams. Unlike conventional steam regenerated SRUs, DEC.RSG™ employs an effective TSA cycle (with hot nitrogen) significantly reducing the energy demand and associated environmental footprint.

DEC.ULP™ | Ultra-Loop™ • harnessing waste heat

DEC.ULP™ is an innovative waste heat process specifically designed for Solvent Recovery applications. This approach drastically reduces energy consumption by maximising the recovery and reuse of thermal energy generated during the TSA regeneration cycle. DEC.ULP™ can achieve up to a 53% reduction in the thermal heat balance of the Solvent Recovery Unit (DEC.SRU™) — measured against the baseline thermal energy input (fuel or electrical heating) required to sustain the regeneration cycle in a conventional SRU without energy recovery. The recovered heat is reused within the regeneration circuit itself, reducing the external energy input required to bring the inert gas to the target regeneration temperature (210–220°C), and yielding additional reductions of up to 55% in cooling energy and 49% in CO₂ emissions (Scope 1 & 2 combined). Reduced energy consumption translates to lower operating costs across fuel, electricity, and cooling water. Complete heat-and-mass balances and utility consumption data are available on request.

DEC.ULP™ | Ultra-Loop™ • streamlining complexity

Unlike conventional TSA regeneration cycles that rely on steam, the RSG™ • TSA inert gas N₂ has a simpler and more straightforward approach: this allows for the recovery of solvent mixtures that are either soluble or partially soluble in water or form azeotropes with water.

When paired with DEC.ULP™, the RSG™ • TSA inert gas N₂ process offers significant advantages over vacuum-assisted T+VSA systems involving complex and costly systems, contributing to the overall SRU operation expenses. Additionally, vacuum operation can present operational challenges (e.g. steady SLA flowrates and VOC concentrations) and safety concerns. DEC.ULP™-equipped SRUs are designed to handle the full industrial SLA range — from 3,000 Nm³/h to over 1,000,000 Nm³/h — maintaining optimal thermal recovery performance across the entire volume spectrum. Conversely, DEC.ULP™ eliminates these complexities, lowering capital expenditures and ensuring a more secure and reliable operation.

DEC.ULP™ | Ultra-Loop™ • strategic CAPEX management

Ultra-Loop™ | DEC.ULP™ process offers flexible implementation pathways, available both as an integrated option for new Solvent Recovery Unit (SRU) constructions and as a provision for future integration. This forward-thinking approach allows companies to either maximize efficiency from the outset or strategically plan for future enhancements. By providing the option for later add-on, DEC.ULP™ enables businesses to manage initial capital expenditure while ensuring seamless scalability and long-term operational optimization.

DEC.ULP™ | Ultra-Loop™ • retrofit

The versatility of the Ultra-Loop™ | DEC.ULP™ process extends to its seamless integration with existing Solvent Recovery Units (SRUs): this retrofit capability allows industries to enhance their current infrastructure without the need for complete overhauls. By strategically incorporating DEC.ULP™'s innovative heating and gas condensation technology, businesses can significantly improve energy efficiency, boost Solvent Recovery rates, and reduce operational costs, all while leveraging their existing capital investments.

DEC.ULP™ | Ultra-Loop™ • versatility

Ultra-Loop™ | DEC.ULP™ process is designed for versatility, allowing it to be seamlessly interfaced with complementary systems such as Combined Heat and Power (CHP), Combined Cooling, Heat and Power (CCHP), Thermophotovoltaic (TPV) and Organic Rankine Cycle (ORC) technologies: this integration capability enhances overall energy optimization, enabling industrial facilities to maximize efficiency across multiple energy recovery and generation processes while maintaining a compact and sustainable operational footprint.

DEC.ULP™ | Ultra-Loop™ • a paradigm shift

The introduction of DEC.ULP™ marks a significant advancement in Solvent Recovery technology. By recovering TSA energy and reducing the need for external heating sources, DEC.ULP™ achieves remarkable energy efficiency gains and simplifies the SRU process. This hybrid innovative approach not only reduces operating costs but also contributes to sustainable industrial practices. As industries seek to optimize resource utilization and minimize their environmental footprint, DEC.ULP™ is poised to become the preferred process coupled with SRU Solvent Recovery method for gas phase applications.

The Ultra-Loop™ | DEC.ULP™ process exemplifies DEC’s dedication to pioneering sustainable solutions, achieving energy savings in Solvent Recovery. By leveraging innovative TSA technology, DEC continues to redefine environmental efficiency, setting new standards for industrial sustainability. Lower energy consumption leads to reduced carbon footprint and contributions to climate change mitigation.

DEC.ULP™ | Ultra-Loop™ • referenced technology

The Ultra-Loop™ | DEC.ULP™ process has moved beyond theoretical advantages, demonstrating its tangible impact in numerous real-world applications. Dozens of successful project implementations, spanning diverse industrial applications and solvent mixtures, validate its performance claims. These projects showcase not just advertised efficiencies, but measurable reductions in energy consumption, increased Solvent Recovery rates, and demonstrably shortened regeneration cycles. Concrete data from these deployments, including detailed performance metrics and operational results, provide empirical evidence of DEC.ULP™'s effectiveness and reliability in demanding industrial environments.