Thermally moderated hollow fiber sorbent modules in rapidly cycled pressure swing adsorption mode for hydrogen purification

Lively, Ryan P.; Bessho, Naoki; Bhandari, Dhaval; Kawajiri, Yoshiaki; Koros, William J.

doi:10.1016/j.ijhydene.2012.07.110

Cited by 51 publications

(43 citation statements)

References 11 publications

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“…A pure gas permeation test using CO 2 was conducted at 35 °C with a bore‐side feed pressure of 2.4 bar for the post‐treated hollow fiber module to assess the open nature of the porous fiber wall and evaluate changes caused by the amine functionalization. A constant‐volume system permeation box (described in previous work) was used for testing. The pressure of the permeate side remained at atmospheric pressure, and a bubble flowmeter was used to measure the gas permeation rate.…”

Section: Methodsmentioning

confidence: 99%

Effect of Post‐Functionalization Conditions on the Carbon Dioxide Adsorption Properties of Aminosilane‐Grafted Zirconia/Titania/Silica‐Poly(amide‐imide) Composite Hollow Fiber Sorbents

Brennan

Thakkar

et al. 2016

Energy Tech

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In this study, 3‐aminopropyltrimethoxysilane (APS) was used as a grafting agent in three solvents with different polarities for post‐functionalization of a ZrO2–TiO2–SiO2/poly(amide‐imide) composite hollow fiber sorbent (Zr–Ti–Si/PAI‐HF) at ambient temperature. The same fiber at two different states: (i) wet (as‐spun) and (ii) dry were used for amine grafting. The influence of the polarity/nature of various solvents such as acetone, ethanol, and toluene on the CO2 sorption characteristics of wet and dry Zr–Ti–Si/PAI‐HF fibers was investigated accordingly. Several parameters such as grafting time (1–4 h), amine concentration (10–50 wt %), and solvent type (acetone, ethanol, and toluene) were systematically varied. The CO2 sorption capacity and breakthrough tests were performed under simulated flue gas conditions for grafted fiber composites. Our results indicate that the CO2 sorption capacity of amine‐grafted Zr–Ti–Si/PAI‐HF strongly depends on both the type of solvent and the state of the fibers (i.e., dryness or wetness). The APS grafting of wet fibers performed in toluene led to high amine loading and CO2 capacity (1.40 mmol g−1), whereas dry fibers gave rise to a relatively low CO2 capacity (0.90 mmol g−1). In contrast, dry fibers functionalized in either acetone or ethanol exhibited higher CO2 capacity compared to the wet fibers prepared in the same solvent. By using ethanol as a solvent, the solvolysis of the Si−O−Si linkages is much faster than the competitive condensation reaction between the silanol groups (Si−OH) of APS moieties and hydroxyl group (OH) of the ethanol, which leads to the lower siloxane formation. In the case of acetone, a dense polymeric network is formed under condensation reaction between an acetone molecule and the amine moieties, thus reducing the amount of primary amine groups available for interacting with the CO2 molecules.

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Section: Methodsmentioning

confidence: 99%

Effect of Post‐Functionalization Conditions on the Carbon Dioxide Adsorption Properties of Aminosilane‐Grafted Zirconia/Titania/Silica‐Poly(amide‐imide) Composite Hollow Fiber Sorbents

Brennan

Thakkar

et al. 2016

Energy Tech

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“…Modifications and innovations of these adsorbents were reported in regard to different impurities, and most of the studies focused on CO 2 removal. Lively et al [35] used hollow fibers as an adsorbent to investigate the CO 2 removal in PSA experimental devices. The purity of the obtained H 2 was 99.2% pure, with a recovery rate of 88.1%, and this needs to be optimized.…”

Section: Psa Methodsmentioning

confidence: 99%

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

et al. 2021

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Nowadays, we face a series of global challenges, including the growing depletion of fossil energy, environmental pollution, and global warming. The replacement of coal, petroleum, and natural gas by secondary energy resources is vital for sustainable development. Hydrogen (H2) energy is considered the ultimate energy in the 21st century because of its diverse sources, cleanliness, low carbon emission, flexibility, and high efficiency. H2 fuel cell vehicles are commonly the end-point application of H2 energy. Owing to their zero carbon emission, they are gradually replacing traditional vehicles powered by fossil fuel. As the H2 fuel cell vehicle industry rapidly develops, H2 fuel supply, especially H2 quality, attracts increasing attention. Compared with H2 for industrial use, the H2 purity requirements for fuel cells are not high. Still, the impurity content is strictly controlled since even a low amount of some impurities may irreversibly damage fuel cells’ performance and running life. This paper reviews different versions of current standards concerning H2 for fuel cell vehicles in China and abroad. Furthermore, we analyze the causes and developing trends for the changes in these standards in detail. On the other hand, according to characteristics of H2 for fuel cell vehicles, standard H2 purification technologies, such as pressure swing adsorption (PSA), membrane separation and metal hydride separation, were analyzed, and the latest research progress was reviewed.

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“…Structured contactors can reduce pressure drop greatly 32,60 and also fully manage or at least limit thermal effects in the bed. [31][32][33]61 Using a fiber morphology, similar to those used in membranes, but with the polymer skeleton filled with sorbent particles, we can accomplish the same sorts of very low pressure drops experienced in hollow fiber membranes. 32,60 To manage the heat of adsorption, which can be significant in high productivity beds with high operating capacities, the fiber sorbent bed can also incorporate microencapsulated phase change materials (μPCM).…”

Section: Sub-ambient Pressure Swing Adsorption For Co 2 Capturementioning

confidence: 99%

“…In addition, sensitivity of the process energetics and economics to variation in these process variables are discussed. The process framework's viability is considered for the case of thermally-modulated fiber sorbents [31][32][33] for application in a pressure swing adsorption (PSA) process, mainly focusing on how separation performance (productivity and purity) impacts the economics of post-combustion CO 2 capture. Three exemplar thermally modulated fiber sorbents (zeolite 13X and the MOFs UiO-66 and MIL-101(Cr)) are considered to provide insight into the sorbent properties that are most desired for such a process configuration.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Energetics and Economics of Sub-ambient Hybrid Post-Combustion CO2 Capture

DeWitt

Awati

Landa

et al. 2021

Preprint

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Adsorption of CO2 from post-combustion flue gas is one of the leading candidates for globally-impactful carbon capture systems. This work highlights opportunities and limitations of sub-ambient CO2 capture processes utilizing a multi-stage separation process. A hybrid process design using a combination of pressure-driven separation of CO2 from flue gas followed by CO2-rich product liquefaction to produce high purity (>99%) CO2 at pipeline conditions is considered. The economic viability of applying pressure swing adsorption (PSA) processes using fiber sorbent contactors with internal heat management were found to be most influenced by the productivity of the adsorption system. Three exemplar fiber sorbents (MIL-101(Cr), UiO-66, and zeolite 13X) were considered for application in the sub-ambient process of PSA unit. MIL-101(Cr) and UiO-66 fiber composites were estimated to have costs of capture as low as $61/tonne CO2.

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Thermally moderated hollow fiber sorbent modules in rapidly cycled pressure swing adsorption mode for hydrogen purification

Cited by 51 publications

References 11 publications

Effect of Post‐Functionalization Conditions on the Carbon Dioxide Adsorption Properties of Aminosilane‐Grafted Zirconia/Titania/Silica‐Poly(amide‐imide) Composite Hollow Fiber Sorbents

Effect of Post‐Functionalization Conditions on the Carbon Dioxide Adsorption Properties of Aminosilane‐Grafted Zirconia/Titania/Silica‐Poly(amide‐imide) Composite Hollow Fiber Sorbents

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

Analysis of Energetics and Economics of Sub-ambient Hybrid Post-Combustion CO2 Capture

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