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Highly Selective Silica‐supported Copper Catalysts Derived from Copper Phyllosilicates in the Hydrogenation of Adipic Acid to 1,6‐hexanediol
Author(s) -
Jiang JiaWei,
Tu ChengChieh,
Chen ChaoHuang,
Lin YuChuan
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201801580
Subject(s) - copper , catalysis , adipic acid , chemistry , adsorption , yield (engineering) , inorganic chemistry , nuclear chemistry , polymer chemistry , materials science , organic chemistry , metallurgy
Abstract Hydrogenation of adipic acid (AA) is a potential way to prepare 1,6‐hexanediol (HDOL). Herein, silica‐supported copper catalysts derived from copper phyllosilicates were synthesized, characterized, and tested in the hydrogenation of AA to HDOL. In a full conversion of AA, a high yield of HDOL (approximately 90 %) was obtained through the use of each Cu‐based catalyst. The turnover frequency calculated according to the consumption rate of AA was discovered to be dependent on the Cu + /(Cu 0 +Cu + ) ratio and the reduction condition. Moreover, recycling tests showed that a catalyst derived from a copper phyllosilicate had better stability compared with Cu/SiO 2 made through impregnation due to a stronger interaction between Cu and silica. The kinetic analyses based on the global rate expression and Langmuir−Hinshelwood−Hougen−Watson (LHHW) formalism of AA conversion were conducted. The possible competitive adsorption between AA and its derivatives, including hydroxycaproic acid and ϵ‐caprolactone, was thereby revealed.