氢化改性钒基催化剂降解氯苯的机理研究
Mechanism studies on degradation of chlorobenzene over hydrogenation-modified vanadium-based catalysts
陈士杰 1宗建成 1傅一枭 2罗京 2秦恒飞2
作者信息
- 1. 常州刘国钧高等职业技术学校,江苏 常州 213025
- 2. 江苏理工学院资源与环境工程学院,江苏 常州 213001
- 折叠
摘要
为了在低温下高效、稳定地降解挥发性氯代有机污染物(CVOCs),以偏钒酸铵为VOx 前驱体制备2D纳米片与3D纳米结构的互穿多孔网络结构的L-V2O5 催化剂,并通过氢化技术对催化剂中部分V5+进行还原(H-V2O5).结果表明,该氢化技术降低了催化剂中部分V5+的化学价态,增加了V—O(Ⅱ)和V—O(Ⅳ)上的氧空位数量和催化剂表面活性氧数量.在275℃时,相较于L-V2O5,H-V2O5 对氯苯催化降解的效率提高了约40%.
Abstract
To efficiently and stably degrade chlorine-containing volatile organic compounds(CVOCs)at low temperature,L-V2O5 catalysts with interpenetrating porous network structures of 2D nanosheets and 3D nanostructures are prepared by using ammonium metavanadate as a VOx precursor.Furthermore,part of V5+in the catalysts is reduced through hydrogenation to form H-V2O5.Results show that this hydrogenation technique decreases the chemical valence of some V5+in the catalyst,increases the number of oxygen vacancies on V-O(Ⅱ)and V-O(Ⅳ),and increases the amount of active oxygen on the catalyst surface.The catalytic degradation efficiency of chlorobenzene by H-V2O5 at 275℃is around 40%higher than that by L-V2O5.
关键词
多孔网络结构/钒基催化剂/氢化技术/氯苯降解/含氯挥发性有机物Key words
porous network structure/vanadium-based catalyst/hydrogenation technology/degradation of chlorobenzene/chlorine-containing volatile organic compounds引用本文复制引用
基金项目
教育部高等学校科学研究发展中心专项课题(ZJXF2022320)
出版年
2024
NETL
NSTL
万方数据