Effect of Molybdenum on the Activity Temperature Enlarging of Mn-Based Catalyst for Mercury Oxidation

被引：6

作者：

Zhao, Bo ^{[1
,2
]}

Zhao, Xiaojiong ^{[2
]}

Liang, Yangshuo ^{[1
]}

Wang, Yu ^{[1
]}

Qin, Linbo ^{[1
]}

Chen, Wangsheng ^{[1
]}

机构：

[1] Hubei Key Lab Efficient Utilizat & Agglomerat Met, Wuhan 430081, Peoples R China

[2] Wuhan Univ Sci & Technol, Ind Safety Engn Technol Res Ctr Hubei Prov, Wuhan 430081, Peoples R China

来源：

CATALYSTS | 2020年 / 10卷 / 02期

基金：

中国国家自然科学基金;

关键词：

mercury oxidation; MnO2-MoO3/TiO2; temperature; mars-maessen mechanism; FLUE-GAS COMPONENTS; ELEMENTAL MERCURY; COAL COMBUSTION; SCR CATALYST; REMOVAL; HG-0; PERFORMANCE; REDUCTION; NO; SPECIATION;

D O I：

10.3390/catal10020147

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The MnO2/TiO2 (TM5) catalyst modified by molybdenum was used for mercury oxidation at different temperatures in a fixed-bed reactor. The addition of molybdenum into TM5 was identified as significantly enlarging the optimal temperature range for mercury oxidation. The optimal mercury oxidation temperature of TM5 was only 200 degrees C, with an oxidation efficiency of 95%. However, the mercury oxidation efficiency of TM5 was lower than 60% at other temperatures. As for MnO2-MoO3/TiO2 (TM5Mo5), the mercury oxidation efficiency was above 80% at 200-350 degrees C. In particular at 250 degrees C, the mercury oxidation efficiency of TM5Mo5 was over 93%. Otherwise, the gaseous O-2, which could supplement the lattice oxygen in the catalytic reaction, played an important role in the process of mercury oxidation overTM(5)Mo(5). The results of X-ray photoelectron spectroscopy (XPS) suggested that mercury oxidized by O-2 over TM5Mo5 followed the Mars-Maessen mechanism.

引用

页数：12

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