In situ reactivation of passivated Ni-on-alumina catalysts for toluene hydrogenation in a dielectric field
In situ reactivation of passivated Ni-on-alumina catalysts for toluene hydrogenation in a dielectric field
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介电场中甲苯加氢钝化镍载氧化铝催化剂的原位再活化
DOI：
10.1006/jcat.2001.3487
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发表时间：
2002
影响因子：
7.3
通讯作者：
A. Bliek
中科院分区：
文献类型：
--
作者：
B. Vos;E. Poels;A. Bliek
近年来，在微波辅助催化和微波辅助催化剂合成方面进行了大量的研究。目前，我们已经测试了使用电介质场原位活化钝化镍氧化铝使用电介质场。作为一个模型催化反应，甲苯加氢。使用介电加热和常规加热来研究反应本身，从而评估介电加热对催化剂结构和活性的影响。此外，我们还研究了应用介电场再生失活焦炭形成的氧化铝上的镍。结果表明，在原位活化的钝化催化剂在介电场中确实是可能的，但在原位除焦是不太可能是可行的，因为对于中等电场强度的焦炭颗粒所达到的温度是不够的，以实现碳甲烷化。
In recent years quite some research has been carried out in microwave-assisted catalysis and in microwave-assisted catalyst synthesis. Presently we have tested the use of dielectric fields for in situ reactivation of passivated Ni-on-alumina using dielectric fields. As a model catalytic reaction, hydrogenation of toluene was employed. The reaction itself was studied using both dielectric and conventional heating, thereby assessing the impact of dielectric heating on catalyst structure and activity. Further, we have studied the application of a dielectric field to regenerate Ni-on-alumina deactivated by coke formation. It is shown that in situ activation of a passivated catalyst in a dielectric field is indeed possible, but in situ decoking is not likely to be feasible, because for moderate electric field strengths the temperatures attained by coke particles are insufficient to realize carbon methanation.