Efficient and product-controlled depolymerization of lignin oriented by metal chloride cooperated with Pd/C. (March 2015)

• Record Type: Journal Article
• Authors: Shu, Riyang; Long, Jinxing; Yuan, Zhengqiu; Zhang, Qi; Wang, Tiejun; Wang, Chenguang; Ma, Longlong
• Is Part Of: Bioresource technology. Volume 179(2015)
• Page Start: 84
• Page End: 90
• Publication Date: 2015-03
• Subjects: Lignin -- Product-controlled -- Guaiacols -- Phenols -- Phenolic monomer; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2014.12.021
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Lignin depolymerization was presented using metal chloride cooperated with Pd/C. 85.6% lignin liquefaction with 35.4% phenolic monomer yield was shown. Highly controllable product distribution could be realized. Both the acid catalytic and coordination catalytic mechanism were proposed. Abstract: An efficient lignin depolymerization process with highly controllable product distribution was presented using metal chloride (MCl x ) cooperated with Pd/C. The catalytic performances of MCl x 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.