Recent progress in CO<sub>2</sub> catalytic reduction to high value-added chemicals

Abstract

CO2 is a kind of greenhouse gas, which has an important influence on the atmospheric environment, and it is also a kind of cheap carbon resource. The production of urea and ammonium bicarbonate by the reaction of NH3 and CO2 in the synthetic ammonia industry is a model for the large-scale utilization of CO2. Recent studies show that with the effect of high efficiency catalyst, CO2 can be used as a raw material to participate in the synthesis of fine chemicals. For example, CO2, H2 (or organosilane) and amines can generate N- formamide and N , N- dimethylamine. H2 (or organosilane) can reduce CO2 to form formic (acetic) acid. CO2 can also be used as a raw material to participate in the synthesis of basic chemicals. CO2 and H2 can produce high value-added chemicals such as light olefins and methanol under different reaction conditions, which opens up some new ways for the conversion and utilization of CO2. In this article, we summarize, review and forecast the high efficiency catalyst system, process conditions of catalytic system and mechanism of catalytic reaction about the catalytic reduction of CO2 with H2 in recent years. Specifically, we focus on three types of chemical reactions: CO2, H2 (or organosilane) and amines generate N- formamide and N , N- dimethylamine; H2 (or organosilane) reduce CO2 to form formic (acetic) acid; CO2 and H2 produce high value-added chemicals such as light olefins and methanol. We expect to provide a reference for the development of new technology about the catalytic reduction of CO2 to produce high value-added chemicals.