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A medium-low temperature coal tar hydrodeoxygenation catalyst and its preparation and application

A low-temperature coal tar and deoxidation catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of inability to efficiently remove oxygen and break C-O bonds The weak ability and other problems, to achieve the effect of short production cycle, promote adsorption, and no pollution to the environment

Active Publication Date: 2022-01-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, efficient oxygen removal cannot be achieved due to the weak ability of the active metal Ni to break the C–O bond.

Method used

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  • A medium-low temperature coal tar hydrodeoxygenation catalyst and its preparation and application
  • A medium-low temperature coal tar hydrodeoxygenation catalyst and its preparation and application
  • A medium-low temperature coal tar hydrodeoxygenation catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Under constant temperature conditions of 32°C, dissolve 3.2g of F127 and 0.4g of citric acid in 20ml of absolute ethanol, add 1.6g of 37wt% concentrated hydrochloric acid, seal with PE film and keep stirring for 30min.

[0036] Then add 3.26g of aluminum isopropoxide, 0.2050g of cerium nitrate, 0.4729g of zirconium nitrate and 0.2688g of nickel nitrate under rapid stirring, seal with PE film and keep stirring for 24h to form a sol.

[0037] The formed sol was transferred to a watch glass and kept in an oven at 45°C for 48h and at 100°C for 24h to form a light green film-like sample.

[0038] The sample was placed in a muffle furnace, the heating rate was controlled to be 1 °C / min, and the temperature was raised to 400 °C for 4 h for calcination.

[0039] After calcination, the sample was placed in a vacuum tube furnace, heated and reduced in a hydrogen atmosphere, controlled at a heating rate of 2°C / min, and kept at 500°C for 4 hours, and finally prepared ordered mesopo...

Embodiment 2

[0041]Under constant temperature conditions of 32°C, dissolve 3.2g of F127 and 0.4g of citric acid in 20ml of absolute ethanol, add 1.6g of 37wt% concentrated hydrochloric acid, seal with PE film and keep stirring for 30min.

[0042] Then add 3.26g aluminum isopropoxide, 0.2640g cerium nitrate, 0.3915g zirconium nitrate and 0.2688g nickel nitrate under rapid stirring, seal with PE film and continue stirring for 24h to form a sol.

[0043] The formed sol was transferred to a watch glass and kept in an oven at 45°C for 48h and at 100°C for 24h to form a light green film-like sample.

[0044] The sample was placed in a muffle furnace, the heating rate was controlled to be 1 °C / min, and the temperature was raised to 400 °C for 4 h for calcination.

[0045] After calcination, the sample was placed in a vacuum tube furnace, heated and reduced in a hydrogen atmosphere, controlled at a heating rate of 2°C / min, and kept at 500°C for 4 hours, and finally prepared ordered mesoporous 5Ni / ...

Embodiment 3

[0047] Under constant temperature conditions of 32°C, dissolve 3.2g of F127 and 0.4g of citric acid in 20ml of absolute ethanol, add 1.6g of 37wt% concentrated hydrochloric acid, seal with PE film and keep stirring for 30min.

[0048] Then add 3.26g of aluminum isopropoxide, 0.3190g of cerium nitrate, 0.3154g of zirconium nitrate and 0.2688g of nickel nitrate under rapid stirring, seal with PE film and keep stirring for 24h to form a sol.

[0049] The formed sol was transferred to a watch glass and kept in an oven at 45°C for 48h and at 100°C for 24h to form a light green film-like sample.

[0050] The sample was placed in a muffle furnace, the heating rate was controlled to be 1 °C / min, and the temperature was raised to 400 °C for 4 h for calcination.

[0051] After calcination, the sample was placed in a vacuum tube furnace, heated and reduced in a hydrogen atmosphere, controlled at a heating rate of 2°C / min, and kept at 500°C for 4 hours, and finally prepared ordered mesopo...

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PUM

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Abstract

The invention discloses a medium-low temperature coal tar hydrodeoxygenation catalyst, which uses transition metal Ni as an active component and ordered mesoporous Al 2 o 3 As a carrier, Ce and Zr are doped into it to form Ce containing a large number of oxygen vacancies 1‑x Zr x o 2 The solid solution is formed as an auxiliary agent and has an ordered mesoporous structure, with the structural formula aNi / bCe 1‑x Zr x o 2 ‑cOMA (x=0.4~0.7) means. The catalyst of the invention has good catalytic performance and high deoxygenation rate, can promote the breaking of C-O bonds in oxygen-containing compounds, and improve the hydrodeoxygenation performance of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of hydrodeoxygenation catalysts in coal chemical industry, and relates to a catalyst for hydrodeoxygenation reaction of medium and low temperature coal tar components, and a preparation method of the catalyst. Background technique [0002] my country is a large coal country, among which low metamorphic coal such as lignite and long-flame coal account for 45.68% of the total coal reserves. Low-rank coals can be classified and utilized through medium and low temperature pyrolysis, and coal tar is one of the main products of medium and low temperature pyrolysis, which has great utilization value. [0003] Medium and low temperature coal tar contains a large amount of aromatic oxygen-containing compounds. A higher oxygen content (5-10wt%) will reduce the calorific value and stability of the oil, and at the same time make the oil have higher viscosity and corrosiveness, which cannot Use as high-quality automotiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10C10G45/06
Inventor 杜朕屹郭良刘迪李文英冯杰
Owner TAIYUAN UNIV OF TECH
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