Being the most abundant and cheap C-1 carbon resource, the CO2 fixation and utilization were one of the most important researching subjects in CO2 Chemistry. Many products such as methane, methanol, dimethyl ether, formaldehyde, formic acid, low hydrocarbon, glycol etc. can be synthesized via CO2 hydrogenation. Effective conversion this abundant resource of carbon dioxide into useful chemical resources bears an extreme significance to the exploit of chemical materials and environmental protection.

Contents
1 Introduction
2 CO2 fixation separation technologies
2.1 Physical separation technologies
2.2 Chemical fixation technologies
2.3 Biological fixation technologies
3 CO2 utilization technique
3.1 Status of CO2 utilization technique
3.2 CO2 chemical utilization technique
4 Key problems and expectation