Isomerization of n-butane over sulfated zirconia catalyst under supercritical conditions
Isomerization of n-butane over sulfated zirconia catalyst under supercritical conditions
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DOI：
10.1016/j.apcata.2005.03.005
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发表时间：
2005-05-26
影响因子：
5.5
通讯作者：
Segawa, K
中科院分区：
文献类型：
--
作者：
Funamoto, T;Nakagawa, T;Segawa, K
超临界流体中的多相催化过程为当前催化剂技术提供了环境友好的替代方案。在常压下固体酸催化剂上轻质烷烃异构化的情况下，催化剂由于催化剂表面上的焦炭形成而迅速失活。为了解决这个问题，我们研究了正丁烷在硫酸化氧化锆上在正丁烷超临界条件下的异构化反应物和产物。在超临界条件下，没有观察到明显的失活，并且保持了稳态活性。此外，通过FT-IR光谱对硫酸化氧化锆的活性位点进行了表征：发现硫酸化氧化锆上的路易斯酸位点在正丁烷的异构化过程中发挥着重要作用。 (c) 2005 Elsevier B.V. 保留所有权利。
Heterogeneous catalytic processes in supercritical fluids offer environmentally benign alternatives to current catalyst technologies. In the case of isomerization of light alkanes over solid acid catalysts at atmospheric pressure, the catalysts deactivate rapidly due to coke formation on the catalyst surface. To solve this problem, we studied the isomerization of n-butane over sulfated zirconia in a n-butane supercritical condition of reactant and products. Under the supercritical condition, no significant deactivation was observed, and the steady state activity was maintained. Furthermore, the active sites of sulfated zirconia were characterized by FT-IR spectroscopy: it was found that Lewis acid sites on sulfated zirconia play an important role in the isomerization of n-butane. (c) 2005 Elsevier B.V. All rights reserved.