A Study of White‐Spirit Vapor Combustion on Pt/Al₂O₃ Catalyst

Abstract

The objective of the work is to investigate the catalytic combustion of white spirit solvent vapors at low concentration in air, typical for depollution applications, on a commercial catalyst, Pt/c-Al 2 O 3 (0.5 wt-% Pt). To study the influence of the main variables on the process kinetics, experiments were performed under various operating conditions (temperature domain: 150-350°C; flow rates: 125-250 mL min -1 ; white spirit concentrations: 220-260 ppmv). The stoichiometry and kinetics of the vapor combustion was described globally by using a pseudo-compound, representing the average molecular weight and the carbon/hydrogen ratio of the mixture. Experimental data were reasonably well correlated by a first order rate expression with respect to the apparent concentration of the lumping pseudocomponent.