刘阳

个人信息Personal Information

副教授

硕士生导师

主要任职:无

性别:男

出生日期:1986-12-12

毕业院校:大连理工大学

学位:博士

所在单位:化工海洋与生命学院

学科:环境工程

办公地点:大连理工大学盘锦校区D06-403

联系方式:liuyang20180129@dlut.edu.cn

电子邮箱:liuyang20180129@dlut.edu.cn

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Heat treatment of MnCO3: An easy way to obtain efficient and stable MnO2 for humid O3 decomposition

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论文类型:期刊论文

第一作者:Liu, Yang

通讯作者:Zhang, PY (reprint author), Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China.

合写作者:Zhang, Pengyi,Zhan, Jingjing,Liu, Lifen

发表时间:2019-01-01

发表刊物:APPLIED SURFACE SCIENCE

收录刊物:SCIE

卷号:463

页面范围:374-385

ISSN号:0169-4332

关键字:Catalytic removal; Ozone; Manganese carbonate; Heat treatment; Water resistance

摘要:The competitive water adsorption in the practical environment usually causes severe deactivation of the O-3 decomposition catalysts. In this study, MnCO3 was used as precursor to prepare efficient and stable MnO2 catalyst for gaseous O-3 decomposition in humid stream. The sample S-300, prepared by calcining MnCO3 at 300 degrees C for 6 h, exhibited 63% (80%) of removal efficiency for 120 (43) ppm of O-3 under a high space velocity of 600 L g(-1) h(-1) and 50% (40%) of relative humidity at 25 degrees C, which is superior to the commercial O-3 scrubber (oxide compound of Cu and Mn) and alpha-MnO2. However, even lower or higher treatment temperature did not further promote humid O-3 decomposition. Thorough characterizations, especially by the temperature programmed and in situ DRIFTs experiments, demonstrate that the large amount of active oxygen vacancies and strong Lewis-acid sites together with the easy recovery of the occupied oxygen vacancies and weak interaction with water molecules accounted for the excellent O-3 decomposition activity in humid stream. Besides, the developed pores by thermal decomposition of MnCO3 might also facilitate O-3 removal. This study provides an easy and rational design of affordable and efficient catalysts for environmental application.