Catalyst used in preparation of long-chain alkane through catalytic hydrodeoxygenation of biomass

A long-chain alkane, biomass technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbon production from oxygen-containing organic compounds, etc. The problems of harsh reaction conditions and low energy efficiency can achieve the effect of improving selectivity, high reactivity and simple preparation method.

Active Publication Date: 2014-08-13
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst of the present invention realizes the high-selectivity preparation of long-chain alkanes under relatively mild conditions, and solves the problem of harsh r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of Nb by Sol-Gel Method 2 o 5 -SiO 2 (Nb:Si=1:10) carrier, loaded with 5%Pd by impregnation method.

[0019] Put 1.5g of stearic acid (octadecanoic acid) and 6g of solvent n-hexane into a batch-type autoclave with a 50ml polytetrafluoroethylene liner, then add 0.4g of 5%Pt / Nb 2 o 5 -SiO 2 Catalyst, under 1.5MPa hydrogen pressure, high-speed stirring, heating up to 160 o C was reacted for 24 hours, the conversion rate of C18 was 100%, the yield of octadecane was 92%, and the rest was mainly heptadecane.

Embodiment 2

[0021] Preparation of NbOPO by Hydrothermal Method 4 , and then prepared 4%Pt / NbOPO by plasma sputtering 4 catalyst.

[0022] Put 1g of microalgal oil (triglyceride) and 5g of solvent tetrahydrofuran into a batch-type autoclave with a 50ml polytetrafluoroethylene liner, and then add 0.3g of 4%Pt / NbOPO 4 Catalyst, under 2.5MPa hydrogen pressure, high-speed stirring, heating up to 170 o C reacted for 24 hours, the conversion rate of triglyceride was 100%, and the yield of long-chain alkanes was 90%.

Embodiment 3

[0024] The Ir-W / C catalyst was prepared by co-supporting method.

[0025] Put 1g of palm oil (hexadecanoic acid) and 5g of solvent tetrahydrofuran into a batch-type autoclave with a 50ml polytetrafluoroethylene liner, then add 0.3g of the above catalyst, stir at a high speed under 2.0MPa hydrogen pressure, and heat up to 170 o C reacted for 16 hours, the conversion rate of palmitic acid was 100%, and the yield of hexadecane was 91%.

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Abstract

The invention relates to a catalyst used in preparation of long-chain alkane through catalytic hydrodeoxygenation of biomasses such as microalgae oil, palm oil and plant oil. The catalyst mainly comprises two active ingredients: an acid center of a carrier containing a transition metal and a hydrogenation activity center of the metal, wherein the acid center of the carrier containing the transition metal is used for dewatering an intermediate product generated in biomass hydrogenation, is used as a strong Lewis acid center simultaneously, and has the very strong oxyphilic capacity, so that an important role in hydrogenolysis of a C-O bond is developed. According to the catalyst disclosed by the invention, for example, in the hydrodeoxygenation process of the palm oil, the plant oil and the microalgae oil, the raw material conversion rate can reach 100 percent and the alkane selectivity is more than 90 percent. According to the catalyst disclosed by the invention, the high-selectivity preparation of the long-chain alkane is realized under a relative mild condition, and the problems of rigorous reaction conditions, low energy efficiency, and low high-carbon alkane selectivity in the process of preparing the long-chain alkane from the biomasses are solved.

Description

technical field [0001] This patent relates to a catalyst and reaction process for the efficient preparation of long-chain alkanes by catalyzing the hydrodeoxygenation of biomass (palm oil, vegetable oil, microalgae oil) under relatively mild conditions. It belongs to the use of biomass and its derivatives to synthesize fuel and chemical product research field. Background technique [0002] With the increasingly prominent energy and environmental issues, the development of renewable new energy has become a top priority. Due to the characteristics of low cost, renewable, low pollution and sustainable development of biomass resources, new technologies for preparing fuel oil and fine chemicals from biomass resources have attracted widespread attention at home and abroad. [0003] Lignocellulose is the cheapest and most abundant source of biomass, including cellulose, hemicellulose, and lignin. Currently, monosaccharides, furfural, 5-hydroxymethylfurfural, levulinic acid, pheno...

Claims

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Application Information

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IPC IPC(8): B01J23/648B01J23/652C07C9/22C07C1/22
Inventor 王艳芹邵益夏启能卢冠忠刘晓晖王筠松龚学庆郭耘郭杨龙
Owner EAST CHINA UNIV OF SCI & TECH
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