新型石墨型氮化碳负载氧化钒催化剂的设计及其丙烷氧化脱氢研究

项目名称： 新型石墨型氮化碳负载氧化钒催化剂的设计及其丙烷氧化脱氢研究

项目编号： No.21203014

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 许杰

作者单位： 常州大学

项目金额： 25万元

中文摘要： 丙烯是一种重要的基本化工原料。随着石油资源的短缺，传统的石脑油蒸气裂解和催化裂化生产工艺已远远满足不了丙烯的市场需求。将资源丰富的丙烷脱氢合成丙烯具有重要的研究价值。其中，丙烷氧化脱氢合成丙烯工艺具有热力学有利和催化剂不易失活等优点。负载型钒氧催化体系是丙烷氧化脱氢较为理想的催化剂，然而丙烯选择性和催化活性无法同时提高的局面成为了该催化研究的重点和难点。本项目拟制备高比表面的类石墨型氮化碳，以其为载体，利用其特殊的富N主体结构络合分散钒氧物种，提高钒氧催化剂的分散程度和活性位数量以提高催化活性。同时，利用氮化碳的碱性和高导热能力分别促进丙烯的脱附和缓解反应中的热点效应以提高产物选择性。在此基础上，通过原位谱学研究VO物种对丙烷分子的催化活化行为以及与产物选择性的构效关系。目的是构筑高选择性的丙烷氧化脱氢的新型钒氧催化体系，为设计和合成丙烷活化及定向转化成丙烯的高性能催化剂提供新途径。

中文关键词： 氮化碳；氧化钒；丙烷；氧化脱氢；

英文摘要： Propylene is major building block in petrochemical industry. With the increasing shortage of oil resource, the traditional propylene-productions, i.e. steam pyrolysis of naphtha and fluid catalytic cracking in oil refining have not meet the significantly growing demand of propylene. The dehydrogenation of resource-rich propane to high-value propylene is a promising alternative and has attracted tremendous attention. Among the several dehydrogenation routes, oxidative dehydrogenation (ODH) can be operated in lower temperature and would not be equilibrium limited. Supported vanadia has been widely considered as a promising catalyst for the ODH of propane. However, the fact that it is difficult to improve simultaneously the catalytic activity along with selectivity of propylene, has become the core of the catalysis. This project is to prepare g-CN materials with high surface areas as novel supports for vanadia catalysts. The intrinsic properties of N-rich g-CN materials will be employed to disperse coordinatively the vanadia species, which aims to improve the degree of dispersion and increase the amount of active sites. Meanwhile, the basic property and high thermal conduction of g-CN materials will be applied to enhance the desorption rate of propylene and alleviate the hot spot effect, thus improving the selectiv

英文关键词： Carbon Nitride；Vanadia；Propane；Oxidative dehydrogenation；