The reactions of NO with diesel soot, fullerene, carbon nanotubes and activated carbons doped with transition metals

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• 作者：Christopher J. Tighe ; John S. Dennis ; Allan N. Hayhurst ; Martyn V. Twigg
• 关键词：NO reduction ; Oxidation of carbon ; Transition metals
• 刊名：Proceedings of the Combustion Institute
• 出版年：2009
• 出版时间：2009
• 年：2009
• 卷：32
• 期：2
• 页码：1989-1996
• 全文大小：588 K

文摘

This work investigates the reactions of NO with eight different types of carbon particles: activated pinewood charcoal, activated charcoals doped with iron, nickel, copper or platinum nitrates, fullerene, carbon nanotubes and soot produced from a heavy duty diesel engine. For this mixtures of NO and argon were passed through a fixed bed of carbonaceous particles mixed with quartz sand, held at a temperature between 25 and 850 °C. The concentrations of CO, CO₂, NO, NO₂ and N₂O in the off-gases were measured; the concentration of N₂ was inferred by atomic balance. The balance on atomic oxygen closed well for all the materials studied. The results are discussed in terms of an elementary reaction mechanism; estimates are made of apparent activation energies for the overall reactions forming CO and CO₂.