大气污染NOx治理催化剂的制备及其催化性能
Preparation and catalytic performance of catalysts for NOx control in air pollution
刘明龙1
作者信息
- 1. 德州蓝德再生资源有限公司,山东德州 253000;深高蓝德环保科技集团股份有限公司,河南郑州 450000
- 折叠
摘要
汽车尾气中氮氧化物(NOx)是大气污染的主要污染物之一.选择催化还原消除NOx是一种具有较好应用前景的技术.ZSM-5分子筛用于C2H2-SCR反应消除NOx过程出现的扩散控制问题.通过用NaOH溶液处理微孔NaZSM-5分子筛制备微孔/介孔复合的ZSM-5分子筛催化剂,并用XRD、SEM、N2吸附-脱附和FT-IR等对催化剂进行表征,对1 mol·L-1的NaOH溶液65 ℃下处理90 min的样品进行水热处理疏通孔道,研究表明,介孔的存在可以明显提高ZSM-5分子筛C2H2-SCR的活性.
Abstract
Nitrogen oxides(NOx)in car exhaust are one of the main pollutants of air pollution.Selective catalytic reduction of nitrogen oxides(SCR)is a technology with promising application prospects.ZSM-5 molecular sieve is used for diffusion control issues in the C2H2-SCR reaction to eliminate NOx.Based on this,a microporous/mesoporous composite ZSM-5 molecular sieve catalyst was prepared by treating micro-porous NaZSM-5 molecular sieve with NaOH solution,and the catalyst was characterized by XRD,SEM,N2 adsorption-desorption,and FT-IR.Treat the sample with 1 mol·L-1NaOH solution at 65 ℃ for 90 minutes and then perform hydrothermal treatment to clear the pores,the presence of mesopores can obvi-ously enhance the C2H2-SCR activity of ZSM-5 molecular sieve.
关键词
催化化学/氮氧化物消除/ZSM-5分子筛/碱处理/介孔Key words
catalytic chemistry/nitrogen oxide elimination/ZSM-5 molecular sieve/alkaline treatment/mesoporous引用本文复制引用
出版年
2024
NETL
NSTL
万方数据