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Composite catalyst for hydrodeoxygenation reaction and preparation method thereof

A technology of composite catalyst and deoxidation reaction, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, hydrocarbons, etc., can solve the problems of metal particles easy to agglomerate, become larger, and break the ring, so as to avoid metal particle agglomeration and operation Simple, large surface area effect

Active Publication Date: 2019-04-26
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of this type of catalyst is mainly to use the impregnation method to load the metal on the carrier, and then obtain it through high-temperature calcination and hydrogen reduction. However, in the metal-support catalyst prepared by this method, the metal particles are easy to agglomerate and become larger, and hydrogen reduction will break the catalyst. Episulfide composition structure

Method used

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  • Composite catalyst for hydrodeoxygenation reaction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 0.1g of ammonium molybdate and 1.5g of thiourea in 100mL of water, and conduct a hydrothermal reaction at 200°C for 24h to prepare MoS 2-x . In a stoppered Erlenmeyer flask, 0.3 g MoS 2-x The powder was dispersed in 50 mL of water, and after ultrasonic vibration for 1 h, chloroplatinic acid was added according to the mass content of 2.5% Pt in the composite catalyst. °C and vacuum-dried for 6 hours to obtain a black catalyst.

[0023] Add 12.5 g of n-dodecane, 2.4 g of p-cresol, a typical oxygen-containing compound in biomass oil, and 0.05 g of the above-mentioned catalyst in the autoclave, install the device, use the replacement method to get rid of the air in the autoclave, and then use 10 The rate of ℃ / min was raised from room temperature to 160 ℃, the rotation speed was adjusted to 900 r / min, and the hydrogen pressure was 5.0 MPa. After 3 h of reaction, the conversion rate of p-cresol reached 100%, and the selectivity of methylcyclohexane The hydrodeoxy...

Embodiment 2

[0025] The catalyst was prepared according to the method in Example 1, only the standing temperature and time were changed to 20°C and 24h, and other conditions remained unchanged.

[0026] Add 12.5 g of n-dodecane, 2.4 g of p-cresol, a typical oxygen-containing compound in biomass oil, and 0.05 g of the above-mentioned catalyst in the autoclave, install the device, use the replacement method to get rid of the air in the autoclave, and then use 10 The rate of ℃ / min was raised from room temperature to 140 ℃, the rotation speed was adjusted to 900 r / min, and the hydrogen pressure was 5.0 MPa. After 4 h of reaction, the conversion rate of p-cresol reached 100%, and the selectivity of methylcyclohexane The hydrodeoxygenation activity of the catalyst remained basically unchanged after 5 cycles of reaction.

Embodiment 3

[0028] The catalyst was prepared according to the method in Example 1, except that the mass content of Pt in the composite catalyst was changed to 5%, and the standing temperature and time were changed to 60°C and 12h.

[0029] Add 12.5 g of n-dodecane, 2.4 g of p-cresol, a typical oxygen-containing compound in biomass oil, and 0.05 g of the above-mentioned catalyst in the autoclave, install the device, use the replacement method to get rid of the air in the autoclave, and then use 10 The rate of ℃ / min was increased from room temperature to 140 ℃, the rotation speed was adjusted to 900 r / min, and the hydrogen pressure was 5.0 MPa. After 2 hours of reaction, the conversion rate of p-cresol reached 97.7%, and the selectivity of methylcyclohexane was 94.5%, after 5 cycles of reaction, the hydrodeoxygenation activity of the catalyst remained basically unchanged.

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Abstract

The invention discloses a composite catalyst for hydrodeoxygenation reaction and a preparation method thereof. The catalyst comprises metal and MoS2-x, wherein the mass content of the metal is 0.5 to10 percent. The preparation method of the catalyst comprises the following steps: regulating reaction conditions through a hydrothermal method or a solvothermal method, firstly preparing the MoS2-x containing sulphur vacancy, dispersing the MoS2-x into a solvent, adding a metal salt solution, performing dispersing and mixing, reducing metal ion into metal through in-situ reduction, and anchoring the metal to the surface of the MoS2-x. The method is simple in preparation processes, and avoids high-temperature hydrogen reduction, and the formed catalyst has the advantages of high dispersion degree of metal, large specific surface area and high hydrodeoxygenation activity.

Description

technical field [0001] The invention belongs to the technical field of catalyst development, and in particular relates to a composite catalyst for hydrodeoxidation, upgrading and modification of biomass oil and a preparation method thereof. Background technique [0002] Biomass oil is considered to be the most potential energy alternative to petroleum because of its green, environmentally friendly and renewable characteristics. The development and utilization of biomass oil energy to deal with the increasingly serious problems of fossil energy depletion and environmental pollution has attracted widespread attention from the international community. However, there are a large number of oxygen-containing organic compounds in biomass oil. These compounds will not only reduce the combustion calorific value and stability of bio-oil, but also increase the viscosity of oil and corrode storage equipment. Hydrodeoxygenation is currently the most direct and effective technology to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/10C07C5/00C07C13/18C07C15/06
CPCC07C5/00B01J27/051B01J35/394B01J35/61C07C13/18C07C15/06Y02P20/52
Inventor 王威燕仵奎杨运泉王超杨晓峰
Owner XIANGTAN UNIV
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