运用频率响应技术研究乙烯在氢型丝光沸石(HMor)上的吸附机理。在温度252K、压力27~200 Pa下测定乙烯在HMor上的频率响应谱,并据此计算每个吸附过程的动力学参数。研究结果表明,在27~200Pa压力范围内,乙烯在氢型丝光沸石上的吸附由高频吸附和低频吸附同时控制,高频吸附是乙烯的Ⅱ电子进入到H^+的空轨道形成Ⅱ电子的吸附过程,低频吸附是乙烯与SiOH形成氢键的吸附过程。吸附过程以高频吸附为主,低频吸附比高频吸附对平衡压力更敏感。
The frequency response(FR) technique was applied to study the adsorption mechanism of ethylene on H mordenite. The FR spectra of ethylene adsorbed on H-mordenite were recorded at a pressure range of 27-200 Pa and a temperature of 252 K. The dynamics parameters of each adsorption process were derived from the FR spectra. The results showed that the adsorptions of ethylene under said pressure range were controlled by two adsorption processes, i. e. low frequency adsorption and high frequency adsorption. Combining the information from FR spectra and adsorption isotherms, it can be seen that the high frequency adsorption was the main process and the low frequency adsorption process was more sensitive to equilibrium pressure.