Gas/gas and gas/wall average energy transfer from very low-pressure pyrolysis |
| |
Authors: | Robert G Gilbert Keith D King |
| |
Institution: | Department of Theoretical Chemistry, University of Sydney, N.S.W., 2006, Australia;Department of Chemical Engineering, University of Adelaide, Adelaide, S.A., 5001, Australia |
| |
Abstract: | It is shown that data obtained using very low-pressure pyrolysis (VLPP) on the pressure and temperature dependence of unimolecular rate coefficients of reactants with several reaction channels yield average energies transferred in gas/gas and gas/wall collisions (the wall being seasoned quartz at 800–1200 K). The downward average energy transferred, «ΔEå, for chlorocyclobutane/ethylene collisions is found to be 1600 cm?1 at 970 K; «ΔEå for chlorocyclobutane/wall collisions varies from 5000 cm?1 (wall efficiency βw = 0.8) at 930 K to 3500 cm?1 (βw = 0.4) at 1150 K; similar values are found from published data on cycloheptatriene and cyclopropane-d2. This indicates that the assumption of unit wall efficiency usually used in fitting VLPP experiments to RRKM theory needs revision. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|