HCHO Removal by MnO2(x)-CeO2: Influence of the Synergistic Effect on the Catalytic Activity

被引：44

作者：

Guan, Shengnan ^{[1
]}

Huang, Qifu ^{[2
]}

Ma, Jianru ^{[1
]}

Li, Wenzhi ^{[1
]}

Ogunbiyi, Ajibola T. ^{[1
]}

Zhou, Zean ^{[1
]}

Chen, Kun ^{[1
]}

Zhang, Qi ^{[3
]}

机构：

[1] Univ Sci & Technol China, Sch Engn Sci, Dept Thermal Sci & Energy Engn, Basic Res Lab Biomass Convers, Hefei 230026, Anhui, Peoples R China

[2] Beijing Mech Equipment Inst, 50 Yongding Rd, Beijing 100854, Peoples R China

[3] Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2020年 / 59卷 / 02期

基金：

中国国家自然科学基金;

关键词：

BIRNESSITE-TYPE MNO2; FORMALDEHYDE OXIDATION; TEMPERATURE OXIDATION; EFFICIENT CATALYSTS; SURFACE-CHEMISTRY; CO; COMBUSTION; OXIDES; PHOTOCATALYST; NANOPARTICLES;

D O I：

10.1021/acs.iecr.9b05191

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The catalytic performance of MnO2(x)-CeO2 (x = Mn/Ce molar ratio) and the synergistic effect have been investigated in formaldehyde removal. The results showed that formaldehyde achieved 100% conversion at 60 degrees C for MnO2(1.5)-CeO2, with the gas hourly space velocity = 120 000 mL h(-1) g(cat)(-1). It was lower than the formaldehyde removal temperature of MnO2 (130 degrees C) and CeO2 (170 degrees C). The apparent activation energy for HCHO oxidation with MnO2(1.5)-CeO2 was 34.2 kJ mol(-1). The partial mutual replacement of Mnx+ and Cex+ decreases the crystallite size due to the MnO2/CeO2 interaction. The X-ray photoelectron spectroscopy and the Raman analyses show that the Mn3+/Mn and O-ads/G(latt) ratios and the relative concentrations of oxygen vacancies for MnO2(1)-CeO2 and MnO2(1.5) CeO2 were higher than those of the rest of the catalysts. Thus, the lattice oxygen (O-latt) from CeO2 readily transfers to the oxygen vacancy, achieving O-latt activation to surface-adsorbed oxygen (O-ads).

引用

页码：596 / 608

页数：13

共 38 条

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