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High-selectivity biolipid hydrogenation decarboxylation catalyst as well as preparation method and application thereof

A high-selectivity technology for oil hydrogenation, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem that the selectivity of decarboxylation needs to be improved, so as to reduce hydrogen consumption and increase specific Surface, the effect of improving dispersion

Pending Publication Date: 2022-05-13
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 105944750 prepared a catalyst with cobalt, molybdenum, nickel, and tungsten as active components for decarboxylation of oils and fats, but its decarboxylation selectivity needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Put 20g of silicon carbide in a tube furnace and treat it with a mixed gas of hydrogen fluoride and argon at 500°C for 10 minutes, wherein the volume fraction of hydrogen fluoride in the mixed gas is 0.1%; The surface-modified silicon carbide was treated in a nitric acid solution with a mass fraction of 50% for 2 hours, the surface was washed to neutral with distilled water, and dried at 100°C for 24 hours. Dissolve chloroplatinic acid in a solution of water and ethanol, then immerse the dried surface-modified silicon carbide carrier in the solution of chloroplatinic acid at 20°C for 12h, dry at 120°C for 12h; finally bake at 200°C After 24 hours, a highly selective oil hydrodecarboxylation catalyst 1 was obtained, and the mass fraction of the active component Pt in the catalyst 1 prepared in this example was 0.5% of the catalyst.

[0032] Put the catalyst A reduced with hydrogen into a high-temperature and high-pressure reactor, and then add cottonseed oil. The mass ra...

Embodiment 2

[0034] Put 20g of silicon carbide in a tube furnace and treat it with a mixed gas of chlorine and nitrogen for 10 minutes at 700°C, wherein the volume fraction of chlorine in the mixed gas is 0.5%; then roast it at 400°C for 10h, and The final surface-modified silicon carbide was treated with 50% nitric acid solution for 2 hours, its surface was washed to neutral with distilled water, and dried at 200°C for 5 hours; palladium chloride was dissolved in a solution of water and ethanol, and then dried The surface-modified silicon carbide carrier was immersed in a solution of palladium chloride at 30°C for 10h, dried at 200°C for 8h, and the dried sample was calcined at 300°C for 8h to obtain a highly selective oil hydrogenation decarboxylation catalyst 2. Example The mass fraction of the noble metal Pd in ​​the prepared catalyst 2 is 0.8% of the catalyst.

[0035] The reaction evaluation method of Catalyst 2 is the same as that of Catalyst 1. Reaction conditions: reaction temper...

Embodiment 3

[0037] Put 20g of silicon carbide in a tube furnace and treat it with a mixed gas of hydrogen chloride and neon at 800°C for 20 minutes, wherein the volume fraction of hydrogen chloride in the mixed gas is 5%; then bake it at 700°C for 24h, and The calcined silicon carbide was treated in a nitric acid solution with a mass fraction of 50% for 2 hours, its surface was washed to neutral with distilled water, and dried at 150°C for 12 hours; the ruthenium nitrate was dissolved in a solution of water and ethanol, and the dried The silicon carbide was immersed in a solution of ruthenium nitrate at 35°C for 8h, dried at 150°C for 12h, and finally calcined at 700°C for 2h to obtain a highly selective oil hydrogenation decarboxylation catalyst 3. In the catalyst 3 prepared in this example, Ru The mass fraction of the catalyst is 1%.

[0038] The reaction evaluation method of Catalyst 3 is the same as that of Catalyst 1. Reaction conditions: reaction temperature 380°C; hydrogen pressur...

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Abstract

The invention discloses a high-selectivity biolipid hydrogenation decarboxylation catalyst as well as a preparation method and application thereof, and belongs to the field of preparation of biofuels by taking biolipid as a raw material. According to the catalyst, surface modified silicon carbide is used as a carrier, precious metal is used as an active component, and the mass of the precious metal accounts for 0.5-2% of the mass of the catalyst; the preparation method comprises the following steps: treating silicon carbide with a mixed gas of a halogen compound and an inert gas to obtain surface modified silicon carbide; and finally, loading noble metal by taking the surface-modified silicon carbide as a carrier to obtain the noble metal catalyst taking the modified silicon carbide as the carrier. The catalyst is applied to hydrodecarboxylation reaction of biological oil and fat. The catalyst improves the interaction between silicon carbide and precious metal, improves the dispersity of the precious metal, and reduces the content of the precious metal in the catalyst without affecting the activity of the catalyst; the catalyst has high selectivity on a biological oil and fat decarboxylation reaction, and hydrogen consumption and water generation in the reaction process are reduced.

Description

technical field [0001] The invention relates to the field of preparing biofuel from bio-oil as a raw material, in particular to a bio-oil hydrodecarboxylation catalyst, a preparation method and an application. Background technique [0002] With the rapid development of the national economy, my country's demand for energy is increasing year by year. Due to the characteristics of my country's energy structure, the dependence on foreign crude oil exceeds 70%. Therefore, the research and development of renewable, economically feasible, and alternative clean energy has become a hot issue, among which biodiesel has become the focus of research because of its environmental friendliness and renewable advantages. The first-generation biodiesel has problems such as relatively high freezing point and cloud point, poor chemical stability, high density, high viscosity, and incomplete compatibility with petrochemical diesel, which limit its wide application. The second-generation biodies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J37/02C10G3/00
CPCB01J27/24B01J37/0207C10G3/48C10G3/44B01J35/394Y02P30/20
Inventor 李德宝马中义贾丽涛侯博张伟肖勇
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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