NiMoW/MCM-41 composite catalyst for hydrodeoxygenation of octanoic acid and preparation and application thereof

A technology of MCM-41 and composite catalyst, which is applied in physical/chemical process catalysts, molecular sieve catalysts, hydrocarbons, etc., can solve the problems of limitation, low selectivity, difficult recovery, etc., and achieve good recycling rate and high stability , the effect of good catalytic activity

Inactive Publication Date: 2019-09-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the catalysts currently used for octanoic acid hydrodeoxygenation mainly have the d

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Weigh 0.743g of nickel nitrate, 1.932g of ammonium molybdate and 0.041g of tungstic acid to form a 100mL aqueous solution, add 3g of MCM-41 powder that has been dried through a 200 mesh sieve to the mixed solution, stir at room temperature for 24h, and Vacuum rotary evaporation at 60°C, drying at 110°C for 12 hours, and roasting at 550°C for 5 hours to obtain a solid powder sample.

[0028] 2) Weigh 1 g of the solid powder calcined in step 1), and reduce in a hydrogen atmosphere at a flow rate of 60-80 min / mL at 450° C. for 4 h to obtain a NiMoW / MCM-41 composite catalyst.

[0029] Get 1g of the catalyst prepared by the above-mentioned method and put it into a 100mL autoclave, add 1g octanoic acid and 26g hexane, mix well, seal the kettle, and use N 2 Replace the air in the kettle with gas for 3 times, and then use H 2 Replacement of N in the kettle 2 3 times, then filled with 3MPa H 2 , start stirring at 600rpm, and heat to 270°C for 7h. The catalyst was removed...

Embodiment 2

[0031] 1) Weigh 0.743g of nickel nitrate, 1.932g of ammonium molybdate and 0.204g of tungstic acid to form a 100mL aqueous solution, add 3g of MCM-41 powder that has been dried through a 200 mesh sieve to the mixed solution, stir at room temperature for 24h, and Vacuum rotary evaporation at 60°C, drying at 110°C for 12 hours, and roasting at 550°C for 5 hours to obtain a solid powder sample.

[0032] 2) Weigh 1 g of the solid powder calcined in step 1), and reduce in a hydrogen atmosphere at a flow rate of 60-80 min / mL at 450° C. for 4 h to obtain a NiMoW / MCM-41 composite catalyst.

[0033] Get 1g of the catalyst prepared by the above-mentioned method and put it into a 100mL autoclave, add 1g octanoic acid and 26g hexane, mix well, seal the kettle, and use N 2 Replace the air in the kettle with gas for 3 times, and then use H 2 Replacement of N in the kettle 2 3 times, then filled with 3MPa H 2 , start stirring at 600rpm, and heat to 270°C for 7h. The catalyst was removed...

Embodiment 3

[0035]1) Weigh 0.743g of nickel nitrate, 1.932g of ammonium molybdate and 0.408g of tungstic acid to form a 100mL aqueous solution, add 3g of MCM-41 powder that has been dried through a 200 mesh sieve to the mixed solution, stir at room temperature for 24h, and Vacuum rotary evaporation at 60°C, drying at 110°C for 12 hours, and roasting at 550°C for 5 hours to obtain a solid powder sample.

[0036] 2) Weigh 1 g of the solid powder calcined in step 1), and reduce in a hydrogen atmosphere at a flow rate of 60-80 min / mL at 450° C. for 4 h to obtain a NiMoW / MCM-41 composite catalyst.

[0037] Get 1g of the catalyst prepared by the above-mentioned method and put it into a 100mL autoclave, add 1g octanoic acid and 26g hexane, mix well, seal the kettle, and use N 2 Replace the air in the kettle with gas for 3 times, and then use H 2 Replacement of N in the kettle 2 3 times, then filled with 3MPa H 2 , start stirring at 600rpm, and heat to 270°C for 7h. The catalyst was removed ...

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PUM

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Abstract

The invention relates to a NiMoW/MCM-41 composite catalyst for hydrodeoxygenation of octanoic acid, a preparation and an application thereof. The NiMoW/MCM-41 composite catalyst comprises MCM-41 molecular sieve and active metal elements such as nickel, molybdenum and tungsten supported on the molecular sieve, wherein the loading amount of tungsten is 1wt%-15wt% of the mass of the carrier, and theratio of the loading amount of other metals to the mass of tungsten is 1:5-1:1. As that catalyst is prepared by adopting a co-impregnation method, the preparation method is simple, the reproducibilityis good, and the catalyst has high activity and stability; when the catalyst is used for hydrodeoxygenation of octanoic acid, under the conditions of 270 DEG C, hydrogen initial pressure of 3MPa andreaction time of 7h, the conversion of octanoic acid is 97.1%, and the selectivity of octane in the product distribution is 72.0% and the practical meaning is obtained.

Description

technical field [0001] The invention designs a preparation method and application of a NiMoW / MCM-41 supported composite catalyst, belonging to the technical field of catalysts. Background technique [0002] At present, with regard to the method for preparing liquid fuels by hydrodeoxygenation of fats and oils, long-chain carbon fatty acids (C 16 -C 22 ) as a model compound. However, the physical properties of fatty acids with different carbon chain lengths are different, such as acidity, polarity and steric hindrance. These different physical properties will also make the performance of the required catalysts different. Therefore, it is of great theoretical and practical value to study the hydrodeoxygenation performance of medium-chain fatty acids, such as octanoic acid. [0003] Laszlo B (Laszlo B, Gyoergy O, Hanna S, et al.Catalytic hydroconversion of tricaprylin and caprylic acid as model reaction for biofuel production from triglycerides[J].Applied Catalysis A:Genera...

Claims

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Application Information

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IPC IPC(8): B01J29/04B01J35/10C07C1/207C07C9/15
CPCB01J29/045B01J35/1004C07C1/2078C07C9/15
Inventor 魏瑞平朱艳丽肖国民高李璟范敬登缪亚男杨红美徐宁宁张佳慧王华政
Owner SOUTHEAST UNIV
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