ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Reaction mechanisms of carbon dioxide methanation

Erlisa Baraj, Stanislav Vagaský, Tomáš Hlinčik, Karel Ciahotný, and Viktor Tekáč

^aDepartment of Gas, Coke and Air Protection, University of Chemistry and Technology, Technická 5, 160 00, Prague, Czech Republic

E-mail: baraje@vscht.cz

Abstract: Constant increase of carbon dioxide emissions from anthropogenic activities leads to the search of options for its recycling and utilization. Although recycled CO₂ utilization as a raw material for the production of chemicals and propellants can be challenging, it is the most sustainable way to mitigate its emissions. Among the most promising applications of CO₂ is its catalytic fixation with hydrogen via the methanation reaction to methane. CO₂ methanation, depending on the used catalyst and overall reaction conditions, can proceed through different mechanism or pathways. A literature review on the methanation reaction mechanism shows that CO₂ can be converted to methane either by direct methanation or through the formation of a CO intermediate. This article analyses the proposed reaction mechanisms of CO₂ methanation.

Keywords: carbon dioxide – methanation – hydrogenation – catalysis, methane

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2015-0216

Chemical Papers 70 (4) 395–403 (2016)