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本文以TPSR为主要实验手段,结合X-射线衍射图谱分析,孔隙结构分析,TPD及TPR的实验结果,对以Cu/ZnO/Al_2O_3为催化剂的低变反应体系进行了研究。结果表明:在CO变换为CO_2的过程中,有一甲酸型中间络合物生成。这一络合物是由吸附在Cu/ZnO/Al_2O_3上的CO和H_2O(g)相互结合而生成的,其生成部位由催化剂组元ZnAl_2O_4所提供,且其生成后在催化剂表面上发生了转移,而后分解,分解产物脱附形成了CO_2和H_2。
In this paper, TPSR as the main experimental means, combined with the X-ray diffraction pattern analysis, pore structure analysis, TPD and TPR experimental results, Cu / ZnO / Al_2O_3 catalyst for the low-temperature reaction system was studied. The results show that during the conversion of CO to CO_2, a formic acid intermediate complex is formed. The complex is formed by the combination of CO and H_2O (g) adsorbed on Cu / ZnO / Al_2O_3, and its formation site is provided by the catalyst element ZnAl_2O_4, and after the formation of the complex, it is transferred on the surface of the catalyst , And then decomposition, decomposition products formed by the desorption of CO_2 and H_2.