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

页码：45 / 51

页数：7

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