Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 20, Pages 5938-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201600612
Keywords
hydrogen sulfide; Monte Carlo simulations; natural gas; zeolite
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences [DE-FG02-12ER16362]
- Office of Science of the Department of Energy [DE-AC02-06CH11357]
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Raw natural gas is a complex mixture comprising methane, ethane, other hydrocarbons, hydrogen sulfide, carbon dioxide, nitrogen, and water. For sour gas fields, selective and energy-efficient removal of H2S is one of the crucial challenges facing the natural-gas industry. Separation using nanoporous materials, such as zeolites, can be an alternative to energy-intensive amine-based absorption processes. Herein, the adsorption of binary H2S/CH4 and H2S/C2H6 mixtures in the all-silica forms of 386zeolitic frameworks is investigated using Monte Carlo simulations. Adsorption of a five-component mixture is utilized to evaluate the performance of the 16 most promising materials under close-to-real conditions. It is found that depending on the fractions of CH4, C2H6, and CO2, different sorbents allow for optimal H2S removal and hydrocarbon recovery.
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