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SAPO-11, Pd/SAPO-11 分子體 觸媒上에서 MTO( Methnol to Olefin ) 反應活性에 關한 硏究
金昌大,林相潤,丁碩鎭 慶熙大學校 材料科學技術硏究所 1993 材料科學技術硏究論集 Vol.6 No.-
In order to suggest an efficient catalyst system for methnol-to-olefin(MTO), various catalysts, SAPO-11, ion exchanged Pd/SAPO-11, HZSM-5, SAPO-34 and Mordenite, were prepared, and then characterized with various characterization techniques and evaluated for its ability of MTO. By chemisorbed NH_(3) TPD, we consider that the acid amount and strength could be controlled by the optimum number of ion exchange trials. From the activity test. It was found that the main product was C3 olefin onall of the tested catalysts. In the comparison of the C3 olefin selectivity, SAPO-11 showed the highest selectivity (>80%) in broad temperature region. In case of ion exchanged Pd/SAPO-11 catalyst system, the C3 olefin selectivity was promoted with the number of ion-exchange level until 2, which means that the optimum ion exchange level for the highest yield of C3 olefin from methanol is 2. In case of water addition effect, the C3 olefin selectivity on SAPO-34 was improved dramatically more than 90%, but there was no appearence of selectivity change on SAPO-11 before and after water addition.