Dehydrogenative cracking of n-butane using double-stage reaction
Dehydrogenative cracking of n-butane using double-stage reaction
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DOI：
10.1016/s0926-860x(01)01014-6
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发表时间：
2002-04
影响因子：
5.5
通讯作者：
Kenichi Wakui;K. Satoh;G. Sawada;Koji Shiozawa;Koichi Matano;Kunio Suzuki;T. Hayakawa;Y. Yoshimura;K. Murata;F. Mizukami
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文献类型：
--
作者：
Kenichi Wakui;K. Satoh;G. Sawada;Koji Shiozawa;Koichi Matano;Kunio Suzuki;T. Hayakawa;Y. Yoshimura;K. Murata;F. Mizukami
采用Pt-Sn型脱氢催化剂和负载稀土的HZSM-5型裂化催化剂，研究了正丁烷的脱氢-裂化双级（串联）反应。在反应器上部装载的Pt-Sn催化剂上，正丁烷首先脱氢成正丁烯（1-丁烯和2-丁烯）。然后在反应器下部装载的裂解催化剂上，将正丁烯依次转化为乙烯和丙烯。650℃时，轻烯烃（乙烯+丙烯）的收率为58%。如何抑制烯烃与芳烃和重质产物的双分子反应是高产乙烯和丙烯的关键。结果表明，稀土在抑制双分子反应中起着重要的作用。
Dehydrogenation-cracking double-stage (tandem) reaction of n-butane was studied using a Pt-Sn type dehydrogenation catalyst and a cracking catalyst (rare earth-loaded HZSM-5). n-Butane was firstly dehydrogenated to n-butene (1- and 2-butene) over the Pt-Sn catalyst loaded at the upper part of the reactor. Then n-butene was successively converted to ethylene and propylene over the cracking catalyst loaded at the lower part of the reactor. The yield of light olefins (ethylene+propylene) was 58% at 650°C. The key to obtaining ethylene and propylene in high yield was to determine how the bimolecular reactions of olefins to aromatic and heavier products can be inhibited. It was proved that the loaded rare earths played an important role in inhibiting the bimolecular reactions.