Ru/Al2O3催化剂上二氧化碳甲烷化反应的原位红外光谱研究  

In-situ Infrared Spectroscopy Study of CO2 Methanation over Ru/Al2O3 Catalyst

作　　者：鲁树亮[1] 张齐[1] 彭晖[1] Lu Shuliang;Zhang Qi;Peng Hui(SINOPEC Beijing Research Institute of chemical industry,Beijing 100013,China)

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京100013

出　　处：《广东化工》2020年第9期61-62,54,共3页Guangdong Chemical Industry

摘　　要：利用原位红外光谱研究了Ru/Al2O3催化剂上CO2单物种吸附的稳态反应以及CO2和H2共吸附的稳态反应,并分别与CO的单物种吸附以及CO和H2共吸附的稳态反应进行了比较,结果表明,CO2会与吸附态氢发生解离反应生成CO,CO2在甲烷化过程中被解离生成CO,并产生大量的含碳吸附态和含氧酸根吸附态,含氧酸根吸附态不参与甲烷化反应,含碳吸附态中的桥式吸附态(1865 cm^-1)是生成甲烷的中间态。The steady-state behavior of CO2 adsorption and CO2+H2 adsorption on Ru/Al2O3 catalyst were studied by in-situ infrared spectroscopy. The steady-state behavior was also compared with that of CO adsorption and CO+H2 adsorption. The results showed that CO2 would be dissociate with the adsorbed hydrogen to form CO in the presence of hydrogen. CO2 was dissociated to form CO, and a large number of carbon containing adsorbed state and oxygen containing acid radical adsorbed state were produced. The adsorbed state of oxygen containing acid radical did not participate in the methanation reaction. The bridge adsorbed state(1865 cm^-1) may be the intermediate state before the formation of methane.

关 键 词：二氧化碳 甲烷化 钌 原位红外光谱 

分 类 号：TQ[化学工程]