Extreme Enhancement of Carbon Hydrogasification via Mechanochemistry
Abstract
Carbon hydrogasification is the slowest reaction among all carbon-involved small molecule
transformations. Here, we demonstrate a mechanochemical method that results in both a faster reaction rate and
a new synthesis route. The reaction rate was dramatically enhanced by up to 4 orders of magnitude compared to
the traditional thermal method. Simultaneously, the reaction exhibited a very high selectivity (99.8% CH4, versus
80% under thermal conditions) with a cobalt catalyst. Our study demonstrated that this extreme increase in
reaction rate originates from the continuous activation of reactive carbon species via mechanochemistry. The high
selectivity is intimately related to the activation at low temperature, at which higher hydrocarbons are difficult to
form. This work is expected to advance studies of carbon hydrogasification, and other solid-gas reactions.
Origin : Files produced by the author(s)
Licence : CC BY - Attribution
Licence : CC BY - Attribution