Ethanol as a Fuel Additive: High-Pressure Oxidation of Its Mixtures with Acetylene

An experimental and
modeling study of the oxidation of acetylene–ethanol
mixtures under high-pressure conditions (10–40 bar) has been
carried out in the 575–1075 K temperature range in a plug-flow
reactor. The influence on the oxidation process of the oxygen inlet
concentration (determined by the air excess ratio, λ) and the
amount of ethanol (0–200 ppm) present in the reactant mixture
has also been evaluated. In general, the predictions obtained with
the proposed model are in satisfactory agreement with the experimental
data. For a given pressure, the onset temperature for acetylene conversion
is almost the same independent of the oxygen or ethanol concentration
in the reactant mixture but is shifted to lower temperatures when
the pressure is increased. Under the conditions of this study, the
ethanol presence does not modify the main reaction routes for acetylene
conversion, with its main effect being the modification of the radical
pool composition.