title: One-step hydrotreatment of vegetable oil to produce high quality diesel-range alkanes.
abstract: A one-step hydrotreatment of vegetable oil combining deoxygenation and isomerization to directly produce low cloud point, high quality diesel is devised. The Pt/zeolite bifunctional catalysts prepared by using SAPO-11 and ZSM-22 zeolites as supports are used in this process. Catalytic reactions are conducted in a fixed-bed reactor under a hydrogen atmosphere. Over the bifunctional catalyst, 100 % conversion of soybean oil is obtained at 357 °C, 4 MPa, and 1 h(-1), and 80 % organic liquid yield is achieved, which is close to the maximum theoretical liquid yield. In the organic products, the alkanes selectivity is 100 % with an i-alkanes selectivity above 63 %. NH(3)-temperature programmed desorption (TPD), pyridine IR spectroscopy, and other characterization techniques are used to study the effect of the support acidity on the reaction pathway. Over the Pt/zeolite bifunctional catalyst with less strong Lewis acid sites, the reaction proceeds via the decarboxylation plus decarbonylation pathway. This one-step method provides a new strategy to produce low cloud point, high quality diesel from biomass feedstock in a more economic and attractive way.
authors: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China.
authors: Congxin
authors: C
authors: Wang
authors: Zhijian
authors: Z
authors: Tian
authors: Lei
authors: L
authors: Wang
authors: Renshun
authors: R
authors: Xu
authors: Qianhe
authors: Q
authors: Liu
authors: Wei
authors: W
authors: Qu
authors: Huaijun
authors: H
authors: Ma
authors: Bingchun
authors: B
authors: Wang
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D056804:Biofuels; D006865:Hydrogenation; D010938:Plant Oils / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry; D013696:Temperature; D014280:Triglycerides / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry
chemical_list: D000473:Alkanes; D056804:Biofuels; D010938:Plant Oils; D014280:Triglycerides; D017641:Zeolites; D010984:Platinum