高压脉冲放电协同复合型催化剂去除甲醛的实验

发布时间：2018-02-27 17:50

本文关键词： 脉冲放电复合型催化剂去除甲醛　出处：《电工技术学报》2017年08期 　论文类型：期刊论文

【摘要】：采用高压脉冲放电协同复合型催化剂对甲醛进行去除实验。通过溶胶凝胶法、分步浸渍-溶胶凝胶法制备Ti-Mn基等一系列催化剂,并对催化剂进行XRD、SEM、FT-IR表征。考察催化剂中Ti添加量、Ti和Mn的负载顺序对甲醛去除率的影响,分析脉冲放电对催化剂结构、形貌的影响。结果显示:在放电电压24k V,放电频率40Hz,同时添加含量比为1∶4的Ti和Mn制备的TiO_2-MnO_x/γ-Al_2O_3催化剂与放电等离子体协同去除甲醛效果最好,去除率可达97.5%。脉冲放电能够改变催化剂的结构和晶形,放电之后的TiO_2-Mn Ox/γ-Al_2O_3催化剂表面粗糙度降低,细小的微孔增多,且放电低温等离子体能提高催化剂的活性,使催化剂活性吸附位增加,进一步加强了对甲醛的去除。
[Abstract]:A series of catalysts such as Ti-Mn were prepared by sol-gel method and step by step dip-sol-gel method. The catalyst was characterized by XRDX SEMT-IR, and the effect of loading order of Ti and mn on the formaldehyde removal rate was investigated, and the structure of catalyst was analyzed by pulse discharge. The results show that at the discharge voltage of 24 kV, the discharge frequency of 40 Hz, and the addition of Tio _ 2-MnO _ (x) / 纬 -Al _ 2O _ 3 catalyst prepared by Ti and mn with a content ratio of 1: 4, the best results of formaldehyde removal can be obtained by using the discharge plasma and the Tio _ 2-MnO _ x / 纬 -Al _ 2O _ 3 catalyst. The removal rate can reach 97.5.The pulse discharge can change the structure and crystal shape of the catalyst. After discharge, the surface roughness of TiO_2-Mn _ x / 纬 -Al _ 2O _ 3 catalyst decreases, the number of tiny micropores increases, and the activity of the catalyst can be improved by discharge plasma at low temperature. The adsorption sites of the catalyst increased and the removal of formaldehyde was further strengthened.
【作者单位】：江西理工大学资源与环境工程学院;江西理工大学机电学院;
【基金】：国家自然科学基金(51167007) 江西省教育厅项目(GJJ11455)资助
【分类号】：X51;O643.36

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