A ZSM-5-based Catalyst for Efficient Production of Light Olefins and Aromatics from Fluidized-bed Naphtha Catalytic Cracking |
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Authors: | Jinlong Wan Yingxu Wei Zhongmin Liu Bing Li Yue Qi Mingzhi Li Peng Xie Shuanghe Meng Yanli He Fuxiang Chang |
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Affiliation: | 1. Applied Catalysis Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 110, Dalian, 116023, P.R. China 2. Graduate School of Chinese Academy of Sciences, Beijing, 100039, P.R. China
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Abstract: | A ZSM-5-based catalyst was prepared by spray-dry method for fluidized-bed naphtha catalytic cracking. Multi-techniques, such as X-ray diffraction, scanning electron microscope, 27Al MAS NMR, and NH3–TPD, were employed for the investigation of ZSM-5 framework stability, framework dealumination, and catalyst acidity variation in hydrothermal treatment. Catalytic performances of fluidized-bed naphtha catalytic cracking at 630–680 °C indicated that light olefins and other value-added products could be more efficiently produced compared with the commercial process of thermal steam cracking. Long-term catalytic evaluation implied that naphtha catalytic cracking over the catalyst prepared with spray-dry method and hydrothermal treatment can be carried out at a variable reaction condition with a relatively high and stable light olefins yield. |
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