Resumo

DE BORTOLI, A. L.  e  ANDREIS, G. S. L.. Asymptotic anaysis for coupled hydrogen, carbon monoxide, methanol and ethanol reduced kinetic. Lat. Am. appl. res. [online]. 2012, vol.42, n.3, pp. 299-304. ISSN 0327-0793.

Based on a mechanism composed by 372 reversible chemical reactions among 56 reactive species for the oxidation of ethanol, we propose a reduction strategy to obtain a sixstep kinetic mechanism for the methanol and a seven-step mechanism for the ethanol. A threestep kinetic mechanism results for the carbon monoxide and two-step for the hydrogen. The reduction strategy consists of four steps: 1) estimate the order of magnitude of the rates of chemical reaction, 2) define the main chain, 3) apply the steady-state and partial equilibrium assumptions and 4) justify the assumptions by asymptotic analysis. The main advantage of the obtained reduced mechanisms is the de-crease of the work needed to solve the system of chemical equations. Such decrease is proportional to the order of the number of elementary reactions present in the complete mechanism.

Palavras-chave : Hydrogen; Carbon Monoxide; Methanol; Ethanol; Reduced Mechanisms.