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

Paper ID Volume ID Publish Year Pages File Format Full-Text
51032 46826 2013 7 PDF Available
Title
Catalysts of alkaline nitrates supported on oxides for the diesel soot combustion. Deactivation by hydro-treatment and CO2
Abstract

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/O2 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.

► Catalysts presented in this work are efficient in the soot combustion with NO/O2. ► The CO2 presence in the feed does not modify substantially the activity of catalysts. ► The hydro-treatment process causes a great deactivation of cesium nitrate catalysts. ► Catalysts prepared from lithium nitrate show high resistance to hydro-treatment.

Keywords
Diesel soot; Alkali nitrates; Deactivation; Catalytic combustion
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Catalysts of alkaline nitrates supported on oxides for the diesel soot combustion. Deactivation by hydro-treatment and CO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 34, 5 April 2013, Pages 45–51
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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