论文部分内容阅读
本文以四极质谱作为过渡应答测量中的分析手段,连续快速跟踪和分析被测物种,测量了H_2和CO在改性Rh/Al_2O_3催化剂上的吸附和脱附性能。结果发现,507K时H_2或CO的吸附中存在着部份不可逆吸附。CO和H_2吸附在相同的活性位上,且存在竞争吸附。CO的吸附作用略强於H_2。钾元素的改性使催化剂对H_2或CO的吸附量均减少,然而相对于H_2而言,CO的吸附作用更强了。
In this paper, quadrupole mass spectrometry was used as an analytical tool in the measurement of transient response, the tested species were continuously and rapidly tracked and the adsorption and desorption performance of H_2 and CO on the modified Rh / Al_2O_3 catalyst were measured. The results showed that there was some irreversible adsorption of H 2 or CO at 507K. CO and H 2 adsorbed on the same active site, and there is competitive adsorption. The adsorption of CO is slightly stronger than that of H 2. The modification of potassium element decreased the amount of H 2 or CO adsorbed by the catalyst, however, the adsorption of CO was stronger than that of H 2.