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One‐Step Hydrotreatment of Vegetable Oil to Produce High Quality Diesel‐Range Alkanes
Author(s) -
Wang Congxin,
Tian Zhijian,
Wang Lei,
Xu Renshun,
Liu Qianhe,
Qu Wei,
Ma Huaijun,
Wang Bingchun
Publication year - 2012
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201200219
Subject(s) - deoxygenation , bifunctional , hydrodeoxygenation , chemistry , catalysis , bifunctional catalyst , decarbonylation , vegetable oil refining , diesel fuel , pyridine , selectivity , organic chemistry , yield (engineering) , biodiesel , materials science , metallurgy
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.