Potassium-Activated Wire Mesh: A Stable Monolithic Catalyst for Diesel Soot Combustion

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• 作者：Guolu Qi ; Yexin Zhang ; Aibing Chen and Yifeng Yu
• 刊名：Chemical Engineering & Technology
• 出版年：2017
• 出版时间：January, 2017
• 年：2017
• 卷：40
• 期：1
• 页码：50-55
• 全文大小：636K
• ISSN：1521-4125

文摘

Potassium-modified FeCrAl alloy wire mesh was developed as a catalytic diesel particulate filter to suppress the emission of soot from a diesel engine. Potassium species were deposited on wire mesh by a chemical vapor deposition method, in which a model soot was used to convert KOH into metallic K at high temperatures to subsequently activate the wire mesh. Tests showed that metallic K reacted with the enriched Al₂O₃ component on the surface derived from segregation and successive oxidation during precalcination. The resulting layer of K-O-Al species offers remarkable activity and stability for the catalytic oxidation of diesel soot. The K-activated wire mesh could lower the initial temperature of soot combustion and maintain the activity for several cycles.