Review of Polybed pressure swing adsorption for hydrogen purification

Luberti, Mauro; Ahn, Hyungwoong

doi:10.1016/j.ijhydene.2022.01.147

Cited by 109 publications

(18 citation statements)

References 106 publications

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“…Thereafter, the design of PSA has evolved to incorporate new steps, such as pressure equalization (PE), co-current depressurization (CoD), heavy reflux, and so forth, into the adsorption cycle, with the aim of enhancing its separation performance. The more complex is the step sequence of a cycle, the more adsorption beds does a PSA system need to have in constructing the PSA cycle scheduling table. , …”

Section: Introductionmentioning

confidence: 99%

Optimization Strategy for Enhancing the Product Recovery of a Pressure Swing Adsorption through Pressure Equalization or Co-current Depressurization: A Case Study of Recovering Hydrogen from Methane

Chen

Ahn

2023

Ind. Eng. Chem. Res.

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The step sequence of a pressure swing adsorption (PSA) cycle for gas separation can be as simple as the four steps of Skarstrom cycle, but it can also be made to be very complex by adding new steps with a view to enhancing the product recovery. In particular, pressure equalization (PE) or co-current depressurization (CoD) steps are often introduced to the step sequence of a H 2 purification PSA, as the strategies have been proven successful. However, the PE and CoD steps have been incorporated into the PSA cycle without due consideration on what is the best way of including and operating the steps. In this study, an equilibrium theory method was taken to optimize the PE and CoD steps for improving the product recovery to the maximum. The theoretical PSA model turned out reliable and insightful when applied to an exemplary H 2 purification PSA system, as the results obtained by simply solving the algebraic equations were so consistent with those of the sophisticated numerical simulation and optimization. In this study, the equilibrium theory analysis of a PSA elucidated clearly that there exists an optimal number of the PE steps, and an optimal column pressure at the end of CoD step and the results would be affected greatly by the operating conditions, such as feed composition, operating pressure, and so forth.

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Section: Introductionmentioning

confidence: 99%

Optimization Strategy for Enhancing the Product Recovery of a Pressure Swing Adsorption through Pressure Equalization or Co-current Depressurization: A Case Study of Recovering Hydrogen from Methane

Chen

Ahn

2023

Ind. Eng. Chem. Res.

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“…However, it is worthwhile to note that separation processes are typically conducted using multiple stages. 81 − 83 This is because many materials, when used as single adsorbents, are not capable of performing simultaneous removal of all undesired species and/or boast higher working capacities for undesired species than those of multiple adsorbents. 81 − 83 Use of multiple beds also facilitates the regeneration in a continuous operation.…”

Section: Resultsmentioning

confidence: 99%

“…81 − 83 This is because many materials, when used as single adsorbents, are not capable of performing simultaneous removal of all undesired species and/or boast higher working capacities for undesired species than those of multiple adsorbents. 81 − 83 Use of multiple beds also facilitates the regeneration in a continuous operation. 83 Thus, the high-performing MOFs identified in this work can still find use in the separation of gas mixtures involving SO 2 as long as H 2 O content is removed at an earlier stage in a multi-stage process.…”

Section: Resultsmentioning

confidence: 99%

“…81 − 83 Use of multiple beds also facilitates the regeneration in a continuous operation. 83 Thus, the high-performing MOFs identified in this work can still find use in the separation of gas mixtures involving SO 2 as long as H 2 O content is removed at an earlier stage in a multi-stage process. Similar processes have been previously proposed for the flue gas separation.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the materials identified for selective SO 2 removal in this work should be regarded as promising materials for dry gas mixtures but not necessarily for humid gas mixtures. However, it is worthwhile to note that separation processes are typically conducted using multiple stages. − This is because many materials, when used as single adsorbents, are not capable of performing simultaneous removal of all undesired species and/or boast higher working capacities for undesired species than those of multiple adsorbents. − Use of multiple beds also facilitates the regeneration in a continuous operation . Thus, the high-performing MOFs identified in this work can still find use in the separation of gas mixtures involving SO 2 as long as H 2 O content is removed at an earlier stage in a multi-stage process.…”

Section: Resultsmentioning

confidence: 99%

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Multi-Level Computational Screening of in Silico Designed MOFs for Efficient SO₂ Capture

Demir

Keskin

2022

J. Phys. Chem. C

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SO 2 presence in the atmosphere can cause significant harm to the human and environment through acid rain and/or smog formation. Combining the operational advantages of adsorption-based separation and diverse nature of metal–organic frameworks (MOFs), cost-effective separation processes for SO 2 emissions can be developed. Herein, a large database of hypothetical MOFs composed of >300,000 materials is screened for SO 2 /CH 4 , SO 2 /CO 2 , and SO 2 /N 2 separations using a multi-level computational approach. Based on a combination of separation performance metrics (adsorption selectivity, working capacity, and regenerability), the best materials and the most common functional groups in those most promising materials are identified for each separation. The top bare MOFs and their functionalized variants are determined to attain SO 2 /CH 4 selectivities of 62.4–16899.7, SO 2 working capacities of 0.3–20.1 mol/kg, and SO 2 regenerabilities of 5.8–98.5%. Regarding SO 2 /CO 2 separation, they possess SO 2 /CO 2 selectivities of 13.3–367.2, SO 2 working capacities of 0.1–17.7 mol/kg, and SO 2 regenerabilities of 1.9–98.2%. For the SO 2 /N 2 separation, their SO 2 /N 2 selectivities, SO 2 working capacities, and SO 2 regenerabilities span the ranges of 137.9–67,338.9, 0.4–20.6 mol/kg, and 7.0–98.6%, respectively. Besides, using breakdowns of gas separation performances of MOFs into functional groups, separation performance limits of MOFs based on functional groups are identified where bare MOFs (MOFs with multiple functional groups) tend to show the smallest (largest) spreads.

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Sustainable Liquid‐Organic‐Hydrogen‐Carrier‐Based Hydrogen‐Storage Technology Using Crude or Waste Feedstock/Hydrogen

Kim,

Yoon,

Kim

et al. 2024

Adv Energy and Sustain Res

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For liquid organic hydrogen carrier (LOHC) technology to be competitive with other H2‐storage methods, it is crucial to reduce the cost of LOHC materials occupying the high proportion of the embodied energy required for system implementation. Promising approaches are to convert crude or waste feedstock into LOHC materials and to utilize crude hydrogen sources obtained from various routes. Thus, in this review, the state‐of‐the‐art advances in sustainable LOHC‐based hydrogen storage using crude or waste feedstock, associated with their conversion into LOHC materials, and coupling crude hydrogen with LOHC system to obtain high‐purity H2 without separation and purification are highlighted. Petroleum sources like light cycle oil and pyrolysis fuel oil are used after liquid–liquid extraction, combined distillation/hydroprocessing, and one‐pot hydrotreating–hydrocracking. In case of converting renewable resources (e.g., biomass and plastic waste), depolymerization followed by hydrodeoxygenation is an effective approach. To utilize crude hydrogen sources for hydrogen storage, catalysts should be designed and synthesized toward activating LOHC hydrogenation reaction at lower temperatures, along with high CO resistance. Consequently, this context provides guidance for the development of LOHC technology to accelerate its commercialization.

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Review of Polybed pressure swing adsorption for hydrogen purification

Cited by 109 publications

References 106 publications

Optimization Strategy for Enhancing the Product Recovery of a Pressure Swing Adsorption through Pressure Equalization or Co-current Depressurization: A Case Study of Recovering Hydrogen from Methane

Optimization Strategy for Enhancing the Product Recovery of a Pressure Swing Adsorption through Pressure Equalization or Co-current Depressurization: A Case Study of Recovering Hydrogen from Methane

Multi-Level Computational Screening of in Silico Designed MOFs for Efficient SO₂ Capture

Sustainable Liquid‐Organic‐Hydrogen‐Carrier‐Based Hydrogen‐Storage Technology Using Crude or Waste Feedstock/Hydrogen

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Review of Polybed pressure swing adsorption for hydrogen purification

Cited by 109 publications

References 106 publications

Optimization Strategy for Enhancing the Product Recovery of a Pressure Swing Adsorption through Pressure Equalization or Co-current Depressurization: A Case Study of Recovering Hydrogen from Methane

Optimization Strategy for Enhancing the Product Recovery of a Pressure Swing Adsorption through Pressure Equalization or Co-current Depressurization: A Case Study of Recovering Hydrogen from Methane

Multi-Level Computational Screening of in Silico Designed MOFs for Efficient SO2 Capture

Sustainable Liquid‐Organic‐Hydrogen‐Carrier‐Based Hydrogen‐Storage Technology Using Crude or Waste Feedstock/Hydrogen

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Product

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Multi-Level Computational Screening of in Silico Designed MOFs for Efficient SO₂ Capture