Preparation of N-Doped Activated Carbon for Catalytic Pyrolysis of 1-Chloro-1,1-difluoroethane to Vinylidene Fluoride

摘要

abstract_textpN-doped activated carbons were prepared by calcining the mixture of activated carbon and melamine at 700 degrees C for 4h. Then they were evaluated as the catalysts for the pyrolysis of 1-chloro-1,1-difluoroethane (HCFC-142b) to vinylidene fluoride (VDF). Reactions were carried out under 350(o)C and space velocity of 600 h(-1). Doping of N into the activated carbon increases the conversion of HCFC-142b significantly. Compared with the temperatures of industrial manufacture for VDF at 600 similar to 700(o)C, N-doped activated carbon reduces the reaction temperature significantly (350 degrees C). It is suggested that pyridinic N and pyrrolic N are responsible for the dehydrochlorination of HCFC-142b. The N-doped activated carbon catalyst provides a promising pathway to produce VDF through a low-temperature and energy-saving process via catalytic dehydrochlorination of 1-chloro-1,1-difluoroethane./p/abstract_text