Selective Synthesis of Isobutane from CO2-Containing Synthesis Gas

作者：Li Congming; Fujimoto Kaoru^*

来源：Energy & Fuels, 2014, 28(2): 1331-1337.

DOI：10.1021/ef402393j

A stable and selective process for the synthesis of isobutane-rich light hydrocarbon from CO2-containing synthesis gas was developed using a Cu-Zn-containing hybrid catalyst. The CO2/COx ratio (COx = CO + CO2) in feed was found to show a significant effect on the activity, selectivity, and stability. It was revealed that the stability of the catalyst operated with the syngas of CO2/COx = 0.25 showed almost constant activity and selectivity over 600 h. In combination with the reaction and characterization results, the CO2/COx ratio in feed has obvious effects on the activity and selectivity and every composition of the hybrid catalyst. Under suitable conditions, CO conversion was as high as 80%, hydrocarbon selectivity was near 70%, and C-4 paraffin was 85% [while keeping the dry gas (C-1 + C-2 paraffins) selectivity of 1-2%] with the isobutane/n-butane ratio of 30-35.

• 出版日期2014-2