Jump to main content
Jump to site search

Issue 14, 2017
Previous Article Next Article

Minireview: direct catalytic conversion of sour natural gas (CH4 + H2S + CO2) components to high value chemicals and fuels

Author affiliations

Abstract

The abundance of natural gas reserves can facilitate the transition from fossil derived to fully renewable chemical and fuel generation. Natural gas, however, can contain more than 10% sour gas molecules (chiefly CO2 and H2S), especially in the Middle East and Russia. Currently, the most common sour natural gas separation technologies rely on the use of various amine-based absorption–desorption cycles in absorption towers, membrane separation and cryogenic processes. However, these processes are quite expensive and, unfortunately, result in the necessity for further processing of the sour gas stream. We feel that the implementation of catalytic activation of the sour gas stream, so as to form useful products, has been underexplored and thus has yet to be fully developed. In this paper, we present a series of catalytic reactions for the sour gas components so as to obtain useful chemicals or fuels, such as carbon disulfide (CS2), hydrogen (H2), ethylene (C2H4), ammonium sulfate ((NH4)2SO4) and ammonium thiosulfate ((NH4)2S2O3). Particular catalytic reactions which can form those products are (a) CH4 reforming with H2S on supported metal oxide catalysts, (b) CO2 + H2S + H2 catalytic reaction on K2O/WO3/Al2O3 to yield a CH3SH intermediate, (c) olefin production via CH3SH coupling on zeolites and supported metal oxides and (d) H2S + NH3 catalytic reaction to yield ammonium sulfate ((NH4)2SO4) and ammonium thiosulfate ((NH4)2S2O3) on partial oxidation catalysts. Thermodynamic considerations, together with catalyst design techniques, are discussed for each reaction.

Graphical abstract: Minireview: direct catalytic conversion of sour natural gas (CH4 + H2S + CO2) components to high value chemicals and fuels

Back to tab navigation

Article information


Submitted
13 Feb 2017
Accepted
14 May 2017
First published
15 May 2017

Catal. Sci. Technol., 2017,7, 2919-2929
Article type
Minireview

Minireview: direct catalytic conversion of sour natural gas (CH4 + H2S + CO2) components to high value chemicals and fuels

W. Taifan and J. Baltrusaitis, Catal. Sci. Technol., 2017, 7, 2919
DOI: 10.1039/C7CY00272F

Social activity

Search articles by author

Spotlight

Advertisements