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Room Temperature Conversion of Carbon Dioxide into Fuel Gases by Mechanochemically Reacting with Metal Hydrides
Author(s) -
Pu Kaichao,
Yang Yaxiong,
Qu Xiaolei,
Gao Mingxia,
Liu Yongfeng,
Pan Hongge
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700834
Subject(s) - carbon dioxide , molar ratio , ball mill , alkali metal , materials science , metal , chemical engineering , inorganic chemistry , alkaline earth metal , syngas , carbon fibers , chemistry , catalysis , metallurgy , organic chemistry , composite material , composite number , engineering
Carbon dioxide has attracted more and more attention as a promising C1 resource. Herein, we demonstrate a new, facile mechanochemical strategy for converting CO 2 to fuel (CH 4 , CO and H 2 ) by ball milling carbon dioxide with alkali and alkaline earth metal hydrides (LiH, MgH 2 and CaH 2 ) at room temperature. The resultant products are dependent on the ratio of CO 2 to LiH, and a conversion efficiency of 100% is achieved when the molar ratio of CO 2 to LiH is less than 4:5. These results are due to the thermodynamically favourable but kinetically unfavourable reactions between CO 2 and LiH/MgH 2 /CaH 2 , and the high collision energy allows for initiation of the reactions by ball milling.