Oxidative catalytic cracking of n-butane to lower alkenes over layered BiOCl catalyst
Oxidative catalytic cracking of n-butane to lower alkenes over layered BiOCl catalyst
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DOI：
10.1016/s0926-860x(00)00598-6
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发表时间：
2001-01-22
影响因子：
5.5
通讯作者：
Yoshimura, Y
中科院分区：
文献类型：
--
作者：
Kijima, N;Matano, K;Yoshimura, Y
研究了 BiOCl 催化剂在正丁烷氧化裂解制低级烯烃中的催化性能。结果与同构 LaOCl 和 SmOCl 催化剂的结果进行了比较。 BiOCl催化剂上，在500℃左右的温度下，氧化脱氢和燃烧是主要反应；以上类似600℃氧化裂解反应生成乙烯和丙烯开始显着。在低至625℃的温度下，C-2-C-4烯烃的总产率达到52%，然后在该温度以上下降。在550和600℃的反应温度下，正丁烷和氧气的转化率在6小时内保持恒定。然而，随着 650 摄氏度下的运行时间，两种转化率均略有下降。与 LaOCl 和 SmOCl 催化剂相比，BiOCl 催化剂表现出相当高的烯烃选择性，并抑制正丁烷氧化裂解的深度氧化反应。在500-600℃的温度范围内，BiOCl催化剂的C-2-C-4烯烃的总产率高于LaOCl和SmOCl催化剂的值。 (C) 2001 Elsevier Science B.V. 保留所有权利。
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 similar to 500 degreesC; above similar to 600 degreesC oxidative cracking reaction to produce ethylene and propylene began to be significant. At the temperature as low as 625 degreesC, 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 degreesC. However, both conversions decreased slightly with time-on-stream at 650 degreesC. 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 degreesC. (C) 2001 Elsevier Science B.V. All rights reserved.