title: Pd/Nb2O5/SiO2 catalyst for the direct hydrodeoxygenation of biomass-related compounds to liquid alkanes under mild conditions.
abstract: A simple Pd-loaded Nb2 O5 /SiO2 catalyst was prepared for the hydrodeoxygenation of biomass-related compounds to alkanes under mild conditions. Niobium oxide dispersed in silica (Nb2 O5 /SiO2 ) as the support was prepared by the sol-gel method and characterized by various techniques, including N2 adsorption, XRD, NH3 temperature-programmed desorption (TPD), TEM, and energy-dispersive X-ray spectroscopy (EDAX) atomic mapping. The characterization results showed that the niobium oxide species were amorphous and well dispersed in silica. Compared to commercial Nb2 O5 , Nb2 O5 /SiO2 has significantly more active niobium oxide species exposed on the surface. Under mild conditions (170 °C, 2.5 MPa), Pd/10 %Nb2 O5 /SiO2 was effective for the hydrodeoxygenation reactions of 4-(2-furyl)-3-buten-2-one (aldol adduct of furfural with acetone), palmitic acid, tristearin, and diphenyl ether (model compounds of microalgae oils, vegetable oils, and lignin), which gave high yields (>94 %) of alkanes with little CC bond cleavage. More importantly, owing to the significant promotion effect of NbOx species on CO bond cleavage and the mild reaction conditions, the CC cleavage was considerably restrained, and the catalyst showed an excellent activity and stability for the hydrodeoxygenation of palmitic acid with almost no decrease in hexadecane yield (94-95 %) in a 150 h time-on-stream test.
authors: Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, No. 130 Meilong Road, Shanghai (PR China), Fax: (+86) 21-64253824.
authors: Yi
authors: Y
authors: Shao
authors: Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, No. 130 Meilong Road, Shanghai (PR China), Fax: (+86) 21-64253824.
authors: Qineng
authors: Q
authors: Xia
authors: Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, No. 130 Meilong Road, Shanghai (PR China), Fax: (+86) 21-64253824.
authors: Xiaohui
authors: X
authors: Liu
authors: Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, No. 130 Meilong Road, Shanghai (PR China), Fax: (+86) 21-64253824. gzhlu@ecust.edu.cn.
authors: Guanzhong
authors: G
authors: Lu
authors: Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, No. 130 Meilong Road, Shanghai (PR China), Fax: (+86) 21-64253824. wangyanqin@ecust.edu.cn.
authors: Yanqin
authors: Y
authors: Wang
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D018533:Biomass; D002074:Butanones / Q000737:chemistry; D002384:Catalysis; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D019308:Palmitic Acid / Q000737:chemistry; D010647:Phenyl Ethers / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D014280:Triglycerides / Q000737:chemistry
chemical_list: D000473:Alkanes; D002074:Butanones; D010087:Oxides; D010647:Phenyl Ethers; D014280:Triglycerides; D009556:Niobium; D019308:Palmitic Acid; C031538:phenyl ether; D010165:Palladium; D012822:Silicon Dioxide; C073337:niobium pentoxide; C022618:tristearin
keywords: alkanes; biomass; heterogeneous catalysis; hydrodeoxygenation; niobium