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Preparation of N‐Doped Activated Carbon for Catalytic Pyrolysis of 1‐Chloro‐1,1‐difluoroethane to Vinylidene Fluoride
Author(s) -
Wang Zhikun,
Han Wenfeng,
Zhang Chunpeng,
Zhou Shenglan,
Wang Haili,
Tang Haodong,
Liu Huazhang
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701931
Subject(s) - pyrolysis , catalysis , activated carbon , calcination , fluoride , melamine , space velocity , carbon fibers , doping , materials science , inorganic chemistry , chemistry , organic chemistry , selectivity , adsorption , composite material , composite number , optoelectronics
Abstract N‐doped activated carbons were prepared by calcining the mixture of activated carbon and melamine at 700 o C for 4 h. 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∼700 o C, N‐doped activated carbon reduces the reaction temperature significantly (350 o 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.