Mechanistic insights into porous graphene membranes for helium separation and hydrogen purification

Wei, Shuxian; Zhou, Sainan; Wu, Zhonghua; Wang, Maohuai; Wang, Zhaojie; Guo, Wenyue; Lu, Xiaoqing

doi:10.1016/j.apsusc.2018.02.111

Cited by 46 publications

(24 citation statements)

References 47 publications

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“…Theoretical analyses suggested that H 2 permeability might be improved, by enlarging the pore area by applying 2.5 and 5% biaxial strains to the membranes, without affecting the H 2 /CO 2 and H 2 /CH 4 selectivity. Moreover, Wei et al [88] used density functional theory (DFT) to study the performance of 3N-PG and 6N-PG monolayers composed of porous graphene (PG) membranes and nitrogen in separating H 2 from the H 2 , CO, N 2 , and CH 4 gas mixture. It was also revealed that 3N-PG monolayers and 6N-PG monolayers possessed better H 2 permeability than PG membranes, providing a novel membrane material for H 2 purification.…”

Section: Carbon-based Membranesmentioning

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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Section: Carbon-based Membranesmentioning

confidence: 99%

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

et al. 2021

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“…A few examples are the two-dimensional polyphenylene, 116 the PG-ES1 117 and the nitrogen-substituted porous graphene monolayers 3N-PG and 6N-PG. 118 Figure 18. Diagram of the microstructures of the main types of graphene-based membranes: porous graphene layer (type I), assembled graphene laminates (type II) and graphene-based composite (type III).…”

Section: Two-dimensional Membranesmentioning

confidence: 99%

Carbon monoxide poisoning and mitigation strategies for polymer electrolyte membrane fuel cells – A review

Valdés-López

Mason

Shearing

et al. 2020

Progress in Energy and Combustion Science

118

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Polymer electrolyte membrane fuel cells (PEMFC) have received much attention due to their high power density, good start-stop capabilities and high gravimetric and volumetric power density compared with other fuel cells. However, certain technological challenges persist, which include the fact that conventional anode electrocatalysts are poisoned by low levels (few ppm) of carbon monoxide (CO). This review considers the mechanism of CO poisoning and the effects that it has on the PEMFC performance. The key parameters affecting CO poisoning are identified and methods used to mitigate the effects are discussed. These mitigation strategies are divided into three groups according to the means by which the technologies are applied: pre-treatment of reformate, on board removal of CO and in operando mitigation strategies.

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“…Theoretical studies predict that membranes based on nanoporous graphene can show even higher efficiency than that found in the experiments, especially when the pores are modified with nitrogen. As shown in [85] with use of the density functional method, porous graphene and porous graphene that are modified with nitrogen to varying degrees (Fig. 19) provide the hydrogen permeability value required for industrial applications at 350, 275, and 125 K in configurations Figs.…”

Section: Graphene-based Membranes For the Purification And Concentratmentioning

confidence: 99%

“…The smaller the pores and the larger the gas molecules, the higher the energy barriers preventing the passage of gases through the pores. As a result, the gases studied in [85] can be arranged in the following sequence, in line with their permeability values, which are opposite to the sequence of the energy barrier values: He > H 2 > Ne > CO > N 2 > Ar > CH 4 . A very high selectivity is The authors of [77] compared the permeability and selectivity of graphene and polymer membranes in the separation of the H 2 /CH 4 mixture.…”

Section: Graphene-based Membranes For the Purification And Concentratmentioning

confidence: 99%

Graphene and Graphene-Like Materials for Hydrogen Energy

et al. 2020

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The review is devoted to current and promising areas of application of graphene and materials based on it for generating environmentally friendly hydrogen energy. Analysis of the results of theoretical and experimental studies of hydrogen accumulation in graphene materials confirms the possibility of creating on their basis systems for reversible hydrogen storage, which combine high capacity, stability, and the possibility of rapid hydrogen evolution under conditions acceptable for practical use. Recent advances in the development of chemically and heat-resistant graphene-based membrane materials make it possible to create new gas separation membranes that provide high permeability and selectivity and are promising for hydrogen purification in processes of its production from natural gas. The characteristics of polymer membranes that are currently used in industry for the most part can be significantly improved with small additions of graphene materials. The use of graphene-like materials as a support of nanoparticles or as functional additives in the composition of the electrocatalytic layer in polymer electrolyte membrane fuel cells makes it possible to improve their characteristics and to increase the activity and stability of the electrocatalyst in the reaction of oxygen evolution.

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Mechanistic insights into porous graphene membranes for helium separation and hydrogen purification

Cited by 46 publications

References 47 publications

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

Carbon monoxide poisoning and mitigation strategies for polymer electrolyte membrane fuel cells – A review

Graphene and Graphene-Like Materials for Hydrogen Energy

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