GreenChem 2015-17-2647

CO2 methanation over heterogeneous catalysts:
recent progress and future prospects

Catalytic approaches for CO2 fixation can play an important role, because CO2 can be artificially converted
into reusable chemicals. Among the catalytic reactions of CO2, hydrogenation of CO2, the socalled
methanation reaction, is a suitable technique for the fixation of CO2. This technique can be used to
convert exhausted CO2 into methane (CH4), which can be recycled for use as a fuel or a chemical as well
as by contributing to the reduction of CO2 emissions. Heterogeneous catalysts have been used to hydrogenate
CO2 to methane. Heterogeneous catalysts are preferable to homogenous catalysts in terms of
stability, separation, handling, and reuse, which reflects in lower costs for large-scale production. Significant
progress has been made in this direction, the exploitation of novel heterogeneous catalysts. In this
review, we discussed recent developments in this area, with emphases on catalytic reactivity and its
physicochemical properties and reaction mechanism. Apart from materials aspects and catalytic performance,
we also discuss fundamental strategies for the rational design of materials for effective transformation of
CO2 to methane with the help of H2 and power sources.