Dehydrogenative Cracking of n-Butane over Modified HZSM-5 Catalysts |
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Authors: | K Wakui K Satoh G Sawada K Shiozawa K Matano K Suzuki T Hayakawa Y Yoshimura K Murata F Mizukami |
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Affiliation: | (1) Japan Chemical Industry Association, Japan;(2) Present address: Chemicals Research Laboratory, Idemitsu Petrochemical Co. Ltd., 1-1 Shingu-cho, Tokuyama-city, 745-8691, Japan;(3) National Institute of Advanced Industrial Science and Technology, Japan |
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Abstract: | Dehydrogenative cracking reaction of n-butane was studied using HZSM-5 catalyst modified with various metal oxides. Alkaline earth (magnesium), transition metal (cobalt) and rare earth (lanthanum) elements are used for the modification. The selectivity of the products was studied at low conversion ( 20%). Methane, ethane, ethylene, propylene, butenes and butadiene were the main products. With the use of the cobalt- or magnesium-containing HZSM-5, dehydrogenative cracking was observed and the selectivity of ethylene was much larger than that of ethane. On the other hand, the selectivity of ethylene and ethane were almost the same in the reaction using the lanthanum-containing HZSM-5. It is considered that the cobalt- and magnesium-loaded sites on HZSM-5 played an important role in the dehydrogenative cracking. |
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Keywords: | HZSM-5 butane cracking cobalt dehydrogenation ethylene propylene olefin |
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