Enhanced selective catalytic reduction of NO with NH3 via porous microspherical aggregates of Mn-Ce-Fe-Ti mixed oxide nanoparticles

被引：46
作者：
Tian, Junqi [1 ]
Zhang, Ke [1 ]
Wang, Wei [1 ]
Wang, Fu [2 ]
Dan, Jianming [1 ]
Yang, Shengchao [1 ]
Zhang, Jinli [1 ]
Dai, Bin [1 ]
Yu, Feng [1 ]
机构：
[1] Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China
来源：
GREEN ENERGY & ENVIRONMENT | 2019年 / 4卷 / 03期
关键词：
Mn-Ce-Fe-Ti mixed oxide; Porous microspheres; Spray drying; Selective catalytic reduction; Denitration; LOW-TEMPERATURE SCR; CORE-SHELL STRUCTURE; CARBON NANOTUBES; PERFORMANCE; MECHANISM; MNXCO3-XO4; MNOX/TIO2; OXIDATION; FACILE; DESIGN;
D O I：
10.1016/j.gee.2019.05.001
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：
We rationally designed a high performance denitration (De-NOx) catalyst based on a micrometer-sized spherical Mn-Ce-Fe-Ti (CP-SD) catalyst for selective catalytic reduction (SCR). This was prepared by a co-precipitation and spray drying (CP-SD) method. The catalyst was systematically characterized, and its morphological structure and surface properties were identified. Compare with conventional Mn-Ce-Fe-Ti (CP) catalysts, the Mn-Ce-Fe-Ti (CP-SD) catalyst had superior surface-adsorbed oxygen leading to enhanced "fast NH3-SCR" reaction. The as-obtained Mn-Ce-Fe-Ti (CP-SD) catalyst offered excellent NO conversion and N-2 selectivity of 100.0% and 84.8% at 250 degrees C, respectively, with a gas hourly space velocity (GHSV) of 40,000 h(-1). The porous micro-spherical structure provides a larger surface area and more active sites to adsorb and activate the reaction gases. In addition, the uniform distribution and strong interaction of manganese, iron, cerium, and titanium oxide species improved H2O and SO2 resistance. The results showed that the Mn-Ce-Fe-Ti (CP-SD) catalyst could be used prospectively as a denitration (De-NOx) catalyst. (C) 2019, Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V.
引用
收藏
页码：311 / 321
页数：11
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