Performance improvement of vacuum swing adsorption processes for CO 2 removal with integrated phase change material

Horstmeier, Jan F.; Lopez, Arlette; Agar, David W.

doi:10.1016/j.ijggc.2016.02.013

Cited by 24 publications

(16 citation statements)

References 34 publications

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“…However, the rapid PVSA process is also limited in that the short-term cycle makes the system more adiabatic; thus, the generation of heat of adsorption and resulting amount of the decrease in adsorption is more serious than in the case of the normal PVSA process. The coexistence of adsorbents and phase change materials as latent heat storage mediums in a column may solve this problem 5 , though such a coexistence requires system enlargement. Therefore, to achieve a high-throughput separation system, innovative adsorption materials that exhibit a large loading capacity, high selectivity, and minimal heat of adsorption are required.…”

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confidence: 99%

High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities

et al. 2020

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Establishing new energy-saving systems for gas separation using porous materials is indispensable for ensuring a sustainable future. Herein, we show that ELM-11 ([Cu(BF 4) 2 (4,4′bipyridine) 2 ] n), a member of flexible metal-organic frameworks (MOFs), exhibits rapid responsiveness to a gas feed and an 'intrinsic thermal management' capability originating from a structural deformation upon gas adsorption (gate-opening). These two characteristics are suitable for developing a pressure vacuum swing adsorption (PVSA) system with rapid operations. A combined experimental and theoretical study reveals that ELM-11 enables the high-throughput separation of CO 2 from a CO 2 /CH 4 gas mixture through adiabatic operations, which are extreme conditions in rapid pressure vacuum swing adsorption. We also propose an operational solution to the 'slipping-off' problem, which is that the flexible MOFs cannot adsorb target molecules when the partial pressure of the target gas decreases below the gate-opening pressure. Furthermore, the superiority of our proposed system over conventional systems is demonstrated.

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confidence: 99%

High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities

et al. 2020

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“…Gas storage, adsorption heat pump (AHP), and pressure swing adsorption (PSA) processes are well‐known examples of short‐time adsorption processes. [ 17–20 ]…”

Section: Introductionmentioning

confidence: 99%

“…In the adsorption process, the adsorption performance of the material is significantly affected by the increased adsorbent temperature due to the released heat of adsorption 16 . Therefore, methods to improve adsorption heat removal have been extensively studied [17][18][19][20] . Particularly, in short-time adsorption processes, the period for cooling the adsorbent is extremely short and hence, rapid removal of the heat of adsorption is essential to avoid degradation of the adsorption performance.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, in short-time adsorption processes, the period for cooling the adsorbent is extremely short and hence, rapid removal of the heat of adsorption is essential to avoid degradation of the adsorption performance. Gas storage, adsorption heat pump (AHP), and pressure swing adsorption (PSA) processes are well-known examples of short-time adsorption processes [17][18][19][20] .…”

Section: Introductionmentioning

confidence: 99%

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Phase Change Material‐Containing Mesoporous Zeolite Composite for Adsorption Heat Recovery

Choi

Valtchev

Moteki

et al. 2020

Adv Materials Inter

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A mesoporous zeolite is proposed as a phase change material (PCM) carrier. Owing to its physicochemical properties, the PCM‐containing adsorbent has dual functions, namely simultaneous adsorption, and heat storage. In this study, the mesoporous chabazite‐type zeolite SSZ‐13, is prepared under various conditions to obtain optimized mesoporous SSZ‐13 (MSSZ‐13) as a PCM‐containing adsorbent. The PCM is then successfully introduced in the created mesopore space through vapor phase synthesis, and the micropores could be utilized as an adsorption field. The efficiency of the as‐prepared PCM‐containing MSSZ‐13 is evaluated by a dehumidification process. The afforded experimental results show suppressed bed temperature ramping, owing to the recovery of the heat generated upon H2O adsorption through the PCM. Moreover, the relative amount of adsorbed water increases at the initial period of time‐on‐stream of the contacting humid fluid.

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“…While most of these studies have focused on the heat exchange between the PCMs and heat transfer fluid, few numerical simulations on PCMs in the adsorption process have been reported. 16,17 In the present study, we measured the breakthrough curves and temperature distributions of a packed bed column for nbutane adsorption containing activated carbon and PCM pellets and developed a one-dimensional column model considering the heat transfer between the adsorbent and the PCM. The effects that the weight fraction and melting temperature of the PCM have on the adiabatic adsorption process, which occurs in extreme conditions in a high-throughput adsorption process, were evaluated using the developed column model.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Thermal Management Using Phase-Change Material for Nonisothermal Adsorption Process

Sakanaka

Hiraide

Tanaka

et al. 2020

Ind. Eng. Chem. Res.

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Current energy issues have driven the development of high-throughput separation processes using solid adsorbents as an alternative to distillation. However, it is a crucial problem that the temperature increase due to the adsorption heat significantly reduces the adsorption performance because of near adiabatic operations. Herein, we discuss thermal management using phase change materials (PCMs) in such processes based on a combination of experimental and theoretical studies.Breakthrough curve measurements for n-butane adsorption on a packed bed column containing activated carbon and PCM pellets confirm the validity of our nonisothermal adsorption column model that considers the latent heat of fusion of PCMs. Then, the effects of the melting temperature and weight fraction of PCMs on adsorption performance are thoroughly investigated for an adiabatic adsorption process. Finally, we propose a simple heat balance equation for the optimum weight fraction of PCMs that maximizes the adsorption capacity of the column.

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Performance improvement of vacuum swing adsorption processes for CO 2 removal with integrated phase change material

Cited by 24 publications

References 34 publications

High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities

High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities

Phase Change Material‐Containing Mesoporous Zeolite Composite for Adsorption Heat Recovery

Efficiency of Thermal Management Using Phase-Change Material for Nonisothermal Adsorption Process

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