Identifying Optimal Zeolitic Sorbents for Sweetening of Highly Sour Natural Gas

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Abstract

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 386 zeolitic 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.

Original languageEnglish (US)
Pages (from-to)5938-5942
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number20
DOIs
StatePublished - May 10 2016

Bibliographical note

Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

  • Monte Carlo simulations
  • hydrogen sulfide
  • natural gas
  • zeolite

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