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Reductive Calcination of Mineral Magnesite: Hydrogenation of Carbon Dioxide without Catalysts
Author(s) -
BaldaufSommerbauer Georg,
Lux Susanne,
Aniser Wolfgang,
Siebenhofer Matthäus
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201600094
Subject(s) - magnesite , calcination , methane , carbon monoxide , catalysis , inorganic chemistry , magnesium , chemistry , carbon dioxide , hydrogen , electrochemical reduction of carbon dioxide , carbon fibers , oxide , materials science , organic chemistry , composite number , composite material
The conversion of mineral magnesite to magnesium oxide, methane, carbon dioxide, and carbon monoxide in a hydrogen atmosphere at ambient pressure and overpressure without catalysts is discussed. Low temperature and elevated pressure facilitate CH 4 formation whereas moderate to high temperature and low pressure facilitate CO formation. Methane is formed directly without any additional catalyst. CO 2 emissions are decreased substantially in reductive calcination. Additional experiments revealed that reductively calcined magnesium oxide is a highly active reverse water‐gas shift catalyst. CO formation from gaseous CO 2 and H 2 at catalytically active magnesium oxide was reproducibly confirmed. Further reduction of carbon monoxide to methane is not catalyzed by reductively calcined magnesium oxide.