Oxidative catalytic cracking of n-butane to lower alkenes over layered BiOCl catalyst

• Published in: Applied catalysis. A, General Vol. 206; no. 2; pp. 237 - 244
• Main Authors: Kijima, Norihito, Matano, Koichi, Saito, Masao, Oikawa, Tomo, Konishi, Tomohiro, Yasuda, Hiroyuki, Sato, Toshio, Yoshimura, Yuji
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.01.2001; Elsevier
• Subjects: Alkenes; Applied sciences; BiOCl catalyst; Crude oil, natural gas and petroleum products; Energy; Exact sciences and technology; Fuels; LaOCl catalyst; n-Butane; Oxidative cracking; Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units; SmOCl catalyst; Alkenes; Oxidative cracking; n-Butane; BiOCl catalyst; LaOCl catalyst; SmOCl catalyst; Lanthanum compound; Butane; Oil industry; Bismuth compound; Propene; Alkene; Refining; Ethylene; Samarium compound; Oxidation; Catalytic cracking
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/S0926-860X(00)00598-6

Catalytic performance of BiOCl catalyst has been investigated for the oxidative cracking of n-butane to lower alkenes. Results are compared with those of isostructural LaOCl and SmOCl catalysts. On the BiOCl catalyst, oxidative dehydrogenation and combustion were major reactions at ∼500°C; above ∼600°C oxidative cracking reaction to produce ethylene and propylene began to be significant. At the temperature as low as 625°C, 52% yield of overall C 2–C 4 alkenes was achieved, and then decreased above this temperature. The conversions of n-butane and oxygen were maintained constants within 6 h periods at the reaction temperatures of 550 and 600°C. However, both conversions decreased slightly with time-on-stream at 650°C. BiOCl catalyst shows rather high alkenes’ selectivity and suppresses deep oxidation reactions for the oxidative cracking of n-butane, as compared to the LaOCl and SmOCl catalysts. The overall yield of C 2–C 4 alkenes for the BiOCl catalyst is higher than the values for the LaOCl and SmOCl catalysts over the temperature range of 500–600°C.