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

This work investigates the reactions of NO with eight different types of carbon particles: activated pine-wood 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 degrees C. The concentrations of CO, CO2, NO, NO2 and N2O in the off-gases were measured the concentration of N-2 was inferred by atomic balance. The balance oil atomic oxygen closed well for all the materials studied. The results are discussed in terms of in elementary reaction mechanism. estimates are made of apparent activation energies for the overall reactions forming CO and CO2. (C) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.