Catalysts of alkaline nitrates supported on oxides for the diesel soot combustion. Deactivation by hydro-treatment and CO2

被引：9
|
作者：
Lucia Ruiz, Maria [1 ]
Daniela Lick, Ileana [2 ]
Isabel Ponzi, Marta [1 ]
Natalia Ponzi, Esther [2 ]
机构：
[1] CONICET UNSL, INTEQUI, RA-5730 San Luis, Argentina
[2] CCT La Plata CONICET UNLP, CINDECA, Dept Quim, Fac Ciencias Exactas, RA-1900 La Plata, Buenos Aires, Argentina
来源：
CATALYSIS COMMUNICATIONS | 2013年 / 34卷
关键词：
Diesel soot; Alkali nitrates; Deactivation; Catalytic combustion; ACTIVE OXYGEN; OXIDATION; CEO2;
D O I：
10.1016/j.catcom.2013.01.011
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 deactivation of supported catalysts CsNO3 and LiNO3 for diesel soot combustion is studied in this work. The effect of hydro-treatment at high temperature and presence of CO2 in feed flow were investigated. Catalysts were characterized by means of X ray diffraction, DSC technique and FTIR. A fixed bed reactor was used to measure activity of fresh and deactivated catalysts with NO2/O-2 feed. Thermogravimetrical system with air/CO2 feed was used to study the deactivation with CO2. Catalysts with LiNO3 were the most resistant to deactivation by hydro-treatment, and they are not deactivated by CO2. It is postulated that the cesium nitrate solubilizes in water and is eliminated during the hydro-treatment, instead, lithium species interacted more strongly with the support and generate more resistance species. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：45 / 51
页数：7
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