CrHZSM-5 Zeolites – Highly Efficient Catalysts for Catalytic Cracking of Isobutane to Produce Light Olefins |
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Authors: | Jiangyin Lu Zhen Zhao Chunming Xu Aijun Duan Pu Zhang |
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Affiliation: | (1) Faculty of Chemical Science and Engineering, State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18#, Fuxue Road, Chang Ping District, Beijing, 102249, China |
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Abstract: | The CrHZSM-5 catalysts with trace amount of Cr were firstly used for catalytic cracking of isobutane, and the effect of Cr-loading
on the catalytic performances of CrHZSM-5 catalysts for the cracking of isobutane was also studied. The results suggested
that when the loading of Cr in the CrHZSM-5 catalysts was less than 0.038 mmol/g Cr, especially at Cr loading of 0.004 mmol/g,
both the reactivity of isobutane cracking and the selectivity to light olefins of CrHZSM-5 samples were greatly enhanced compared
with the unpromoted HZSM-5, and very high yields of olefins(C2+C3) and ethylene were obtained. For instance, the yield of olefins(C2+C3) and ethylene reached 56.1% and 30.8%, respectively, at 625 °C when 0.004 mmol/g Cr was loaded on HZSM-5 sample. |
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Keywords: | CrHZSM-5 zeolite catalytic cracking isobutane light olefins |
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