Article
Materials Science, Multidisciplinary
Can Xu, Weichen Wei, Yong He
Summary: The hydrogen separation performance of molecular sieving membranes was significantly enhanced through ion exchange, showing great potential for application in hydrogen purification.
Article
Chemistry, Inorganic & Nuclear
Enming Ping, Xiaoxiao Chen, Yunshan Zhou, Lijuan Zhang, Lingyun Kong, Nan Chen
Summary: In this study, CAU-10-H@gamma-AlOOH and UTSA-16@CAU-10-H@gamma-AlOOH were prepared. Cryogenic gas chromatography at 77 K using the composites achieved complete separation of o-H-2 and D-2 with CAU-10-H@gamma-AlOOH, while UTSA-16@CAU-10-H@gamma-AlOOH achieved more efficient separation of hydrogen isotopes in a shorter time. The molecular simulation results showed that CAU-10-H had both chemical affinity quantum sieving and kinetic sieving effects, while UTSA-16 only exerted the kinetic sieving effect.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Enming Ping, Xiaoxiao Chen, Yunshan Zhou, Lijuan Zhang, Lingyun Kong, Nan Chen
Summary: In this study, CAU-10-H@gamma-AlOOH was prepared and UTSA-16 was loaded onto it, resulting in UTSA-16@CAU-10-H@gamma-AlOOH. While CAU-10-H@gamma-AlOOH achieved the complete separation of o-H2 and D2, UTSA-16@CAU-10-H@gamma-AlOOH achieved higher efficiency separation in a shorter time. Molecular simulation results showed that CAU-10-H has both chemical affinity quantum sieving and kinetic sieving effects, while UTSA-16 can only exert the kinetic sieving effect. The presence of Co2+ in UTSA-16 promoted the conversion of para-H2 to ortho-H2.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Chemical
Xiaoyan Ji, Yan Bao, Conghui Du, Qiuhui Shi, Wenlong Xu, Zhining Wang
Summary: Researchers have successfully prepared a two-dimensional zeolite membrane with a layered structure and demonstrated its potential application in water treatment. The membrane has good water permeability, high rejection rate, and excellent stability.
Article
Engineering, Environmental
Jianing Yang, Leila Dehdari, Yalou Guo, Jining Guo, Ranjeet Singh, Penny Xiao, Jin Shang, Ali Zavabeti, Gang Kevin Li
Summary: This article presents a design for a deblending process to remove hydrogen from blended gas. The results show that a multiple-bed pressure swing adsorption (PSA) using zeolite 3A can achieve high purity methane products suitable for gas turbines.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Mengjie Hou, Lin Li, Zilong He, Ruisong Xu, Yunhua Lu, Tonghua Wang
Summary: A novel hydroxyl-containing polyetherimide (BAHPPF-ODPA) was designed and synthesized as the precursor for carbon molecular sieve membranes (CMSMs) for H2/N2 separation. The evolution of structure during pyrolysis and its relationship with membrane performance were investigated. The results showed that the precursor chemistry and pyrolysis conditions significantly influenced the microstructure and performance of CMSMs.
Article
Multidisciplinary Sciences
Sheng Zhou, Osama Shekhah, Adrian Ramirez, Pengbo Lyu, Edy Abou-Hamad, Jiangtao Jia, Jiantang Li, Prashant M. Bhatt, Zhiyuan Huang, Hao Jiang, Tian Jin, Guillaume Maurin, Jorge Gascon, Mohamed Eddaoudi
Summary: A mixed-linker metal-organic framework (MOF) membrane, Zr-fum(67)-mes(33)-fcu-MOF, with a specific pore aperture shape, has been developed for efficient removal of nitrogen from natural gas while simultaneously removing carbon dioxide. Techno-economic analysis shows that this membrane has the potential to significantly reduce methane purification costs.
Article
Chemistry, Multidisciplinary
Fan Wu, Liqiong Li, Yanxi Tan, El-Sayed M. El-Sayed, Daqiang Yuan
Summary: Hydrogen isotope separation is a challenging task due to their similar properties. Through the study of MOFs with high stability and abundant metal open sites, it was found that Co(2()m-dobdc) showed the best performance with the best sorption capacity and adsorption enthalpy at low pressure, making it suitable for industrial hydrogen isotope separation. The results indicate that H-2 and D-2 capacities under low pressure dominate the final D-2/H-2 separation property of MOFs.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Yi Luo, Wenhua Fu, Bin Wang, Zhiqing Yuan, Junliang Sun, Xiaodong Zou, Weimin Yang
Summary: A novel porous germanosilicate SCM-25 with large accessible cavities via widepore windows has been synthesized. It has a high surface area and thermal stability. The study also proposes a potential postsynthetic strategy for the preparation of zeolites with ordered meso-cavities.
INORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Shengyang Zhou, Jiayu Guan, Ziqin Li, Qifeng Zhang, Jifu Zheng, Shenghai Li, Suobo Zhang
Summary: This study achieved an important breakthrough in the design of functionalized porous materials by synthesizing a series of poly(phenyl-alkane)s with intrinsic microporosity. The exploration of fluorinated PIMs demonstrated excellent gas separation performance, providing valuable insights for environmental and energy applications.
Article
Engineering, Chemical
Shuo Liu, Zixi Kang, Lili Fan, Xuting Li, Bingchen Zhang, Yang Feng, Hongyan Liu, Weidong Fan, Rongming Wang, Daofeng Sun
Summary: A new type of CMS membrane derived from a crystalline porous hydrogen-bonded organic framework membrane (HCMS) was reported for the first time. By controlling the pyrolysis temperature, the CO2/CH4 separation performance of the HCMS membrane was optimized, showing remarkable selectivity and excellent separation stability.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Liu Huang, Ziman Xing, Xinyi Zhuang, Jing Wei, Yulei Ma, Bangda Wang, Xia Jiang, Xuezhong He, Liyuan Deng, Zhongde Dai
Summary: This article critically reviews and discusses the research progress of membranes for hydrogen/methane separation, including polymeric membranes, mixed matrix membranes, and carbon molecule sieve membranes. The study finds that polymeric membranes and carbon molecule sieve membranes exhibit outstanding separation properties, while mixed matrix membranes show lower performance. The article also presents the future research directions and perspectives for hydrogen/methane separation membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Igor Bezverkhyy, Victor Boyer, Clement Cabaud, Jean-Pierre Bellat
Summary: Quantum sieving is a promising method for the separation of hydrogen isotopes at low temperatures. This study found that the aperture size in zeolites is more important for quantum sieving than the interaction between guest cations.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2023)
Article
Materials Science, Ceramics
Yosuke Nakamura, Sachiko Matsushita, Akira Nakajima, Toshihiro Isobe
Summary: Carbon-based membranes were synthesized on porous alumina via a hydrothermal method from aqueous glucose solutions. The hydrothermal treatment time and temperature were evaluated to study their effects on the microstructure of the membranes. The obtained carbon membranes were found to be deposited both on the surface and in the interiors of the porous alumina. The carbon membrane prepared at a hydrothermal treatment of 200 degrees C for 5 hours showed few pinholes and consisted of amorphous carbon with hydroxy groups. Gas transmission rate measurements indicated that the membrane had a pore size of approximately 0.3 nm and exhibited high selectivity for various gas mixtures.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Abhishek Sharma, Deepak Rawat, S. K. Raut, Ram Avtar Jat, S. C. Parida
Summary: Due to the large hydrogen isotope effect, palladium and palladium-based alloys are of great technological importance for hydrogen isotope separation. This study investigated the isotope effect on the hydrogen desorption kinetics of Pd, Pd0.77Ag0.23, and Pd0.77Ag0.10Cu0.13 alloys using non-isothermal differential scanning calorimetry. The results revealed a significant isotope effect for the Pd0.77Ag0.10Cu0.13 alloy, making it a favorable candidate for hydrogen isotope separation using self-displacement gas chromatography.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)