Pyrolysis of 1,1-Dichloro-1-Fluoroethane in the Absence and Presence of Added Propene or CCl_4: A Computer-Aided Kinetic Study

摘要

The thermal dehydrochlorination CCI2FCH3 -CCIF=CH2 + HCI has been studied in a static system between 610 and 700 K at pressures ranging from 14 to 120 torr. The experiments were performed in the absence and presence of an added inhib~or (0.5 to 7 torr :>f C3H6) or catalyst (2 to 8 torr of CCI4). The evolution of the reaction was followed by measuring the pressure rise in the quartz reaction vessel and analyzing the products by gas chromatog- raphy. All the experimental results can be explained quantitatively in terms of a reaction model both radical and molecular. The molecular dehydrochlorination has an activation energy of 57.05 kcal/mol and a preexponential factor of 101402 S-I.