**Recent Advances in Heterogeneous Catalytic Hydrogenation of CO2 to Methane Recent Advances in Heterogeneous Catalytic Hydrogenation of CO2 to Methane**

Zuzeng Qin, Yuwen Zhou, Yuexiu Jiang, Zili Liu and Hongbing Ji Zuzeng Qin, Yuwen Zhou, Yuexiu Jiang, Zili Liu and Hongbing Ji

Additional information is available at the end of the chapter Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/65407

#### **Abstract**

With the accelerating industrialization, urbanization process, and continuously upgrading of consumption structures, the CO2 from combustion of coal, oil, natural gas, and other hydrocarbon fuels is unbelievably increased over the past decade. As an important carbon resource, CO2 gained more and more attention because of its converting properties to lower hydrocarbon, such as methane, methanol, and formic acid. Among them, CO2 methanation is considered to be an extremely efficient method due to its high CO2 conversion and CH4 selectivity. However, the CO2 methanation process requires high reaction temperatures (300–400°C), which limits the theoretical yield of methane. Thus, it is desirable to find a new strategy for the efficient conversion of CO2 to methane at relatively low reaction temperature, and the key issue is using the catalysts in the process. The advances in the noble metal catalysts, Ni-based catalysts, and Co-based catalysts, for catalytic hydrogenation CO2 to methane are reviewed in this paper, and the effects of the supports and the addition of second metal on CO2 methanation as well as the reaction mechanisms are focused.

**Keywords:** catalytic hydrogenation, carbon dioxide, methanation, heterogeneous catalysis, noble metal catalyst, Ni-based catalyst, Co-based catalyst
