Nanoporous MoS2 monolayer as a promising membrane for purifying hydrogen and enriching methane

We present a theoretical prediction of a highly efficient membrane for hydrogen purification and natural gas upgrading, i.e. laminar MoS2 material with triangular sulfur-edged nanopores. We calculated from first principles the diffusion barriers of H2 and CO2 across monolayer MoS2 to be, respectivel...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2017-09, Vol.29 (37), p.375201-375201
Main Authors: Zhang, Yadong, Meng, Zhaoshun, Shi, Qi, Gao, Haiqi, Liu, Yuzhen, Wang, Yunhui, Rao, Dewei, Deng, Kaiming, Lu, Ruifeng
Format: Article
Language:English
Subjects:
diffusion barrier
hydrogen purification
molybdenum disulfide
natural gas upgrading
permeance
selectivity
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Summary:We present a theoretical prediction of a highly efficient membrane for hydrogen purification and natural gas upgrading, i.e. laminar MoS2 material with triangular sulfur-edged nanopores. We calculated from first principles the diffusion barriers of H2 and CO2 across monolayer MoS2 to be, respectively, 0.07 eV and 0.17 eV, which are low enough to warrant their great permeability. The permeance values for H2 and CO2 far exceed the industrially accepted standard. Meanwhile, such a porous MoS2 membrane shows excellent selectivity in terms of H2/CO, H2/N2, H2/CH4, and CO2/CH4 separation (>103, >  103, >  106, and  >  104, respectively) at room temperature. We expect that the findings in this work will expedite theoretical or experimental exploration on gas separation membranes based on transition metal dichalcogenides.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/aa7d5e