α-MnO2/Mn2O3/AISI304丝网整体式催化剂的制备及催化燃烧碳烟性能研究  

Preparation of α-MnO/MnO/AISI304 wire-mesh monolithic catalyst and its performance in catalytic combustion of soot

作　　者：刘经伟[1] 陈力 管国锋[2] LIU Jing-wei;CHEN Li;GUAN Guo-feng(Sinopec Yangzi Petrochemical Co.,Ltd.,Nanjing 210048,China;College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]中国石化扬子石油化工有限公司,江苏南京210048 [2]南京工业大学化工学院,江苏南京211816

出　　处：《现代化工》2020年第11期173-177,共5页Modern Chemical Industry

基　　金：中国石化项目(320005)。

摘　　要：采用两步水热法制备α-MnO2/Mn2O3/AIS304丝网整体式催化剂,首先通过尿素水热法在AISI304丝网上生长Mn2O3涂层;然后在涂层表面原位生成以α-MnO2为活性组分的催化剂。利用XRD、SEM、N2吸附-脱附、H2-TPR等对催化剂进行表征考察了不同焙烧温度对整体式催化剂结构和碳烟催化燃烧性能的影响。结果表明,培烧温度为700℃时,Mn-Nit-700的活性组分以α-MnO2纳米棒为主具有更加丰富的表面活性氧物种(焙烧温度<500℃),有利于碳烟的催化燃烧反应。在O2/N2氛围下,Mn-Nit-700催化剂的催化燃烧碳烟性能最佳(T50=388℃),CO2选择性为100%同时具有较佳的抗水性能。A two-step hydrothermal method is utilized to prepare α-MnO2/Mn2 O3/AISI304 wire-mesh monolithic catalyst.Firstly,Mn2 O3 coating grows on AISI304 wire-mesh through urea hydrothermal method,then the catalyst with aMnO2 as active component generates in situ on the coating surface.The as-prepared catalyst is characterized by XRD,SEM,N2 adsorption-desorption,and H2-TPR,et al.Effects of different roasting temperatures on the monolithic catalyst s structure and catalytic combustion performance for soot are investigated.It is shown that α-MnO2 nanorods are the main active components of Mn-Nit-700 when the roasting temperature is 700℃.Mn-Nit-700 has more abundant surface active oxygen species(<500 ℃),which is beneficial to the catalytic combustion of soot.In an O2/N2 atmosphere,Mn-Nit-700 catalyst shows the best catalytic performance for soot combustion(T50=388℃) with excellent water tolerance,and CO2 selectivity can reach 100%.

关 键 词：整体式催化剂 催化燃烧 碳烟 焙烧温度 α-MnO2 

分 类 号：O643.3[理学—物理化学]