石化丙烯腈尾气催化燃烧净化的高N2选择性分子筛催化剂设计

本项目基于石化丙烯腈生产过程中所释放的含氰工艺废气尚未得到根本治理的现状而申请，尝试借助选择性催化燃烧的手段，实现废气中丙烯腈、乙腈、HCN等污染物的净化脱除。拟通过活性组分配伍、拓扑结构的调控、酸性调变，制备出一系列孔径尺度的分子筛催化剂；研究其孔结构、比表面积、硅铝比、表面活性组分的分散度及电子价态；采用红外、程序升温等表面敏感技术，辅以分子模拟手段，认知反应机理；明确织构特性、组成配方与含氰废气的脱除效率以及CN-→N2选择性间的关系；继而，对废气净化技术的经济和环境效益进行综合分析；为其产业化推广奠定理论基础。

The applied proposal focuses on catalytic removal of nitrile gases including acrylonitrile, acetonitrile, and HCN coming from the acrylonitrile plant in petrochemical industry. A series of zeolite catalysts for selectively catalytic combustion of these nitriles would be achieved based on active component screening, topological control, and acid/base adjustment. The pore structure, specific surface area, Si/Al ratio, diversity and status of active component were investigated. Reaction mechanism was studied by experimental FTIR and TPD techniques as well as theoretical molecular simulation. The correlation among textural properties, composition, nitrile removal efficiency, and selectivity towards N2 was clarified. The economical and environmental benefit on this post-treatment technology was evaluated aiming at its practical application.