| 朱全力.程序升温技术考察镍在钼基催化剂中的作用[J].分子催化,2011,(6):527-533 |
| 程序升温技术考察镍在钼基催化剂中的作用 |
| Investigation to the Effect of Nickel on Molybdenum-based Catalyst using TP Technique |
| 投稿时间：2011-10-10 修订日期：2011-12-26 |
| DOI： |
| 中文关键词: 程序升温加氢 程序升温氧化 加氢脱硫 钼基催化剂 |
| 英文关键词:TPH TPO HDS Molybdenum-based Catalyst |
| 基金项目: |
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| 摘要点击次数: 1570 |
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| 中文摘要: |
| 利用程序升温技术考察了Ni促进的和未促进的钼基催化剂上进行噻吩加氢脱硫（HDS），苯、环己烯的程序升温加氢反应（TPH），通过对硫化态催化剂的程序升温还原（TPR）、程序升温脱附（TPD）以及程序升温氧化（TPO）等表征，发现添加Ni之后调变了Mo－S键合行为，使得催化剂在反应过程中易于形成或者维持更多的S配位空位数目，从而促进了对反应底物的吸附与反应。添加镍还调变了硫化态钼基催化剂中所储存氢的键合行为，有利于在催化剂表面形成H的溢流，促进氢转移反应。镍的这些促进作用在噻吩与环己烯的加氢反应中得到了证实。 |
| 英文摘要: |
| The unpromoted- and the nickel promoted-molybdenum-based catalysts were investigated using temperature-programmed technique. Temperature programmed hydrogenation of thiophene, benzene, and cyclohexene were carried out. In order to probe the surface properties of sulfided molybdenum-based catalyst, temperature-programmed reduction (TPR), temperature-programmed desorption (TPD) and temperature programmed oxidation (TPO) of sulfide catalyst, were conducted. The results showed that the added nickel adjusted Mo-S bond of sulfide phase in catalyst, which led to the easy formation of the coordinatively unsaturated sites—active sites for hydrodesulfurization (HDS), thus facilitated adsorption of substrates, followed by the successful reaction. Also the added nickel weakened the binding force of H atoms stored in sulfide catalyst, which led to the easy formation of spillover hydrogen. These promotions were confirmed by the hydrogenation of thiophene and cyclohexene. |
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