Co-pyrolysis of 1, 1, 2-Trichloroethane and Diethyl Ether on Activated Alumina

The co-pyrolysis of 1, 1, 2-trichloroethane (TCE) and diethyl ether on activated alumina wascarried out in order to elucidate the catalytic mechanism for the reaction of CH2ClCHCl2+Et2O = CH2=CCl2+EtCl+EtOH (1) Reaction (1) was found to proceed according to Rideal-Eley's mechanism . The elementaryreactions consist of the following three process : A+ l[Lef-right arrow] Al ( 4 ) Al+B[Lef-right arrow] Rl+S ( 5 ) Rl[Lef-right arrow] R+l ( 6 ) The symbols A, B, R, S and l represent TCE, diethyl ether, dichloroethylenes, ethyl chloride andthe active vacant site on alumina, respectively. The kinetic data are in agreement with the equation based on the desorption controlling stepon a single-site of the catalyst: where k is the rate constant, and PA, PB, PR and PS are the partial pressures of TCE, diethylether, dichloroethylenes and ethyl chloride, respectively. K and KS in equation ( 9 ) represent the equ ilibrium constants denoting KA·Kr·KR and KA·Kr, in which KA, Kr and KR are the equilibrium constants for equations ( 4 ), ( 5 ) and (6).