title: Efficient and product-controlled depolymerization of lignin oriented by metal chloride cooperated with Pd/C.
abstract: An efficient lignin depolymerization process with highly controllable product distribution was presented using metal chloride (MClx) cooperated with Pd/C. The catalytic performances of MClx were investigated. The effect of reaction conditions on the lignin depolymerization and products distribution were also studied. Results showed that more than 35.4% yield of phenolic monomer including 7.8% phenols and 1.1% guaiacols could be obtained under optimized condition. And the product distribution can be efficiently controlled by the modification of the metal cation through different pathway of Lewis acid catalysis and coordination catalysis. Furthermore, the Pd/C catalyst showed an excellent recyclability, where no significant loss of the catalytic activity was exhibited after 3 runs. Moreover, the product control mechanism was proposed.
authors.affiliation: Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Riyang
authors.initials: R
authors.lastname: Shu
authors.affiliation: Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Jinxing
authors.initials: J
authors.lastname: Long
authors.affiliation: Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Zhengqiu
authors.initials: Z
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China. Electronic address: zhangqi@ms.giec.ac.cn.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Tiejun
authors.initials: T
authors.lastname: Wang
authors.affiliation: Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Chenguang
authors.initials: C
authors.lastname: Wang
authors.affiliation: Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Longlong
authors.initials: L
authors.lastname: Ma
mesh_terms: D001272:Atmosphere; D002384:Catalysis; D002712:Chlorides / Q000494:pharmacology*; D006859:Hydrogen / Q000737:chemistry; D058116:Lewis Acids / Q000737:chemistry; D008031:Lignin / Q000737:chemistry*; D010165:Palladium / Q000494:pharmacology*; D010636:Phenols / Q000032:analysis; D058105:Polymerization / Q000187:drug effects*; D011312:Pressure; D012997:Solvents; D013696:Temperature; D013997:Time Factors; D014835:Volatilization
chemical_list: D002712:Chlorides; D058116:Lewis Acids; D010636:Phenols; D012997:Solvents; D010165:Palladium; D006859:Hydrogen; D008031:Lignin
keywords: Guaiacols; Lignin; Phenolic monomer; Phenols; Product-controlled