乙炔、丙烯在多种分子筛上的吸附和脱附性质

在80℃下研究了ZSM5、13X、Y、MOR、5A、SAPO34等多种分子筛和常见载体上乙炔和丙烯的吸附和脱附性能。结果表明，乙炔和丙烯在SiO2、γ-Al2O3上不吸附，而与分子筛存在较强的相互作用。对于同类型的分子筛，两者的饱和吸附量均随分子筛硅铝比的增大而减小。在同一种分子筛上，以摩尔计的丙烯吸附量均明显高于乙炔。在80℃改性β分子筛上乙炔和丙烯饱和吸附量可分别达到0.11mmol/g和4.89mmol/g，该结果明显高于文献报道的结果。

Adsorption and desorption of acetylene and propylene on zeolites

Adsorption and desorption of acetylene and propylene on zeolites ZSM-5, 13X, Y, MOR, 5A, SAPO-34 as well as on catalyst supports SiO2 and γ-Al2O3 were investigated at 80℃. The results illustrated that there exist strong interaction between the adsorbates and the zeolites, but SiO2 and γ-Al2O3 absorb little acetylene and propylene under the conditions here. On the zeolites with the same topological structure framework, the adsorption capacity for propylene and acetylene decreases with an increase of Si/Al ratio; while the adsorption capacity for propylene is always higher than that for acetylene on the same zeolite. Modification of zeolite may enhance its adsorption capacity; over a chemically modified β zeolite, the saturation adsorption amounts for acetylene and propylene at 80℃ reached 0.11mmol/g and 4.89mmol/g, respectively, which were much higher than the values reported in literature up to now.