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The catalytic activities and thermal stabilities of Li/Na/K carbonates for diesel soot oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
53110 46911 2007 5 PDF Available
Title
The catalytic activities and thermal stabilities of Li/Na/K carbonates for diesel soot oxidation
Abstract

The alkali carbonates displayed a good catalytic activity for soot oxidation and their catalytic performances follow the order K2CO3 > Na2CO3 > Li2CO3 with soot ignition onset temperatures (IOTs) of 310 °C, 320 °C and 320 °C respectively. Na/K and Li/Na/K carbonate catalysts produced by combinations of the three alkali carbonates displayed the lowest IOT of about 320 °C that was higher than that of pure K2CO3. It was found that the variation of Li:Na:K molar ratios has very limited effect on the catalytic activity, but considerable effect on the thermal stability of the catalysts.Thermal treatment at 700 °C caused a limited change of IOT, but the deterioration of catalytic performance. In the Li/Na/K catalyst system, the formation of crystalline phases with low melting temperature was observed.

Keywords
Alkali carbonate; Diesel soot oxidation; Catalytic activity; Thermal stability
First Page Preview
The catalytic activities and thermal stabilities of Li/Na/K carbonates for diesel soot oxidation
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 5, May 2007, Pages 760–764
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis