Production of Synthetic Diesel by Hydrotreatment of Jatropha Oils Using Pt−Re/H-ZSM-5 Catalyst

Abstract

Renewable green diesel-type alkanes can be produced by hydrotreating jatropha oil and vegetable oils at standard hydrotreating conditions (i.e., 543−573 K) with Pt/H-ZSM-5 catalysts, which are active under the weight ratio of jatropha or vegetable oil/catalyst of 1. The carbon molar yield of straight chain C15−C18 alkanes was ∼80% for hydrotreating pure jatropha oil. However, under the jatropha oil/catalyst weight ratio of 10, being important from a practical point of view, the alkanes yield falls to only 2.3%. Under a high jatropha oil/catalyst ratio of 10, rhenium-modified Pt/H-ZSM-5 catalyst is found to be effective for raising the C15−C18 alkanes yield. The yield of C15−C18 alkanes is 67% at an optimun Re/Al molar ratio of 0.8. Investigation of catalyst natures indicates that metallic Pt and Re are independently present on the surface, but synergism of these two metals could play an important role in the hydrotreating reaction, even at a high ratio of jatropha oil/catalyst of 10. The reaction pathway involves hydrogenation of the CC bonds of the jatropha oils followed by mainly hydrodeoxygenation with decarbonylation and decarboxylation to form C15−C18 straight chain alkane mixtures.

Rational Formulation of Alternative Fuels using QSPR Methods: Application to Jet Fuels

“…Alternative fuels are synthetic fuels originating from FT synthesis, Hydrotreated of Vegetable Oils (HVO), also called HEFA. HVO and FT products contain normal and iso-paraffins [8,9]. Naphthenic and aromatic compounds can be obtained from the liquefaction or the pyrolysis of biomass [10,11].…”

Catalytic Activity of a Bifunctional Catalyst for Hydrotreatment of Jatropha curcas L. Seed Oil

“…In this work, we use the γ-alumina which is the most commonly used as support on which the active component in this case is dispersed the zeolite USY which presents activity acid. In addition, in the form of dispersion are incorporated platinum particles that act as a function of hydrogenation in the catalyst for the hydrotreatment of Jatropha curcas seed oil [17].…”

Effect of Arene and Naphthene Concentration on Spray Characteristics of Biomass Jet Fuel

“…With the development of bio-based fuel production level, the subsequent treatment of the follow-up products cannot be ignored. For example, we can obtain n-alkanes and isoparaffins by F-T synthesis or vegetable oil hydrotreating [2,3], also we can get naphthenes and aromatic hydrocarbons [4,5] by pyrolysis biomass, as well as through the fermentation process and the esterification process of the vegetable oil, the alcohols and lipids are obtained respectively [6] and so on, and the effects of these subsequent products on the fuel atomization performance are to be studied in depth.…”