Carbon-nitrogen material loaded nickel catalyst with adjustable mesoporous aperture as well as preparation method and application of carbon-nitrogen material loaded nickel catalyst

A carbon-nitrogen material and nickel-loaded technology, which is applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, etc., can solve problems such as low catalytic efficiency, low catalyst service life, and poor mass transfer effect. Achieve the effects of high cycle stability, high specific surface area, and large specific surface area

Inactive Publication Date: 2021-03-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, most of the catalyst supports currently used for lignin depolymerization are microporous structures, which are easy to block during the reaction process, and the mass transfer effect is poor, which leads to the repolymerization of the reaction products and the low service life of the catalyst. Or the catalytic efficiency is low, and the selected mesoporous molecular sieves, such as HZSM-5 and SBA-15, have small mesoporous apertures, are prone to clogged pores, and have poor hydrothermal stability

Method used

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  • Carbon-nitrogen material loaded nickel catalyst with adjustable mesoporous aperture as well as preparation method and application of carbon-nitrogen material loaded nickel catalyst
  • Carbon-nitrogen material loaded nickel catalyst with adjustable mesoporous aperture as well as preparation method and application of carbon-nitrogen material loaded nickel catalyst
  • Carbon-nitrogen material loaded nickel catalyst with adjustable mesoporous aperture as well as preparation method and application of carbon-nitrogen material loaded nickel catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) In a 100ml beaker, weigh 4g of LUDOX@AS-40, add 4g of glucosamine hydrochloride into 50ml of distilled water, and stir for 2 hours at a speed of 300rpm-500rpm to form a uniform transparent mixture.

[0047] 2) Transfer the mixture into a hydrothermal reaction kettle, raise the temperature to 160° C. at a rate of 10° C. / min and react for 12 hours to obtain a black-brown mixture.

[0048] 3) Put the black-brown mixture in an oven at 50°C and dry for 24 hours to obtain a composite of carbon-nitrogen precursor and template agent.

[0049] 4) transfer the obtained compound into the tube furnace, under N 2 Under an atmosphere of 5°C / min, the temperature was raised to 800°C for 2h at a constant temperature to obtain a black solid.

[0050] 5) Add the obtained black solid powder to a 200ml beaker, add 150ml deionized water and 10g sodium hydroxide, wash until neutral, put the obtained filter residue in an oven at 50°C and dry for 24h to obtain a nitrogen-doped carbon carrie...

Embodiment 2

[0059] 1) In a 100ml beaker, weigh 4g of LUDOX@HS-40, add 4g of glucosamine hydrochloride into 50ml of distilled water, and stir for 2 hours at a speed of 300rpm-500rpm to form a uniform transparent mixture.

[0060] 2) Transfer the mixture into a hydrothermal reaction kettle, raise the temperature to 160° C. at a rate of 10° C. / min and react for 12 hours to obtain a black-brown mixture.

[0061] 3) Put the black-brown mixture in an oven at 50°C and dry for 24 hours to obtain a composite of carbon-nitrogen precursor and template agent.

[0062] 4) transfer the obtained compound into the tube furnace, under N 2 Under an atmosphere of 5°C / min, the temperature was raised to 800°C for 2h at a constant temperature to obtain a black solid.

[0063] 5) Add the obtained black solid powder into a 200ml beaker, add 150ml deionized water and 10g sodium hydroxide, wash until neutral, put the obtained filter residue in an oven at 50°C and dry for 24h to obtain a nitrogen-doped carbon carr...

Embodiment 3

[0070] 1) In a 100ml beaker, weigh 4g of LUDOX@SM, add 4g of glucosamine hydrochloride into 50ml of distilled water, and stir for 2 hours at a speed of 300rpm-500rpm to form a uniform transparent mixture.

[0071] 2) Transfer the mixture into a hydrothermal reaction kettle, raise the temperature to 160° C. at a rate of 10° C. / min and react for 12 hours to obtain a black-brown mixture.

[0072]3) Put the black-brown mixture in an oven at 50°C and dry for 24 hours to obtain a composite of carbon-nitrogen precursor and template agent.

[0073] 4) transfer the obtained compound into the tube furnace, under N 2 Under an atmosphere of 5°C / min, the temperature was raised to 800°C for 2h at a constant temperature to obtain a black solid.

[0074] 5) Add the obtained black solid powder to a 200ml beaker, add 150ml deionized water and 10g sodium hydroxide, wash until neutral, put the obtained filter residue in an oven at 50°C and dry for 24h to obtain a nitrogen-doped carbon carrier, d...

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PUM

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Abstract

The invention belongs to the technical field of metal solid catalysts, and particularly discloses a carbon-nitrogen material loaded nickel catalyst with adjustable mesoporous aperture as well as a preparation method and application of the carbon-nitrogen material loaded nickel catalyst. A hydrothermal synthesis process is adopted to pretreat a carbon source precursor and a template agent, and thetemplate agent is well doped into a carbon carrier through a self-assembly process. The synthesized nickel-based composite nitrogen-doped carbon material nano-catalyst carrier has the advantages of adjustable pore size, small metal particles, large specific surface area, uniform dispersion and no obvious agglomeration. Lignin can be efficiently depolymerized to prepare a single-benzene-ring compound, the selectivity to propyl syringol and propyl guaiacol is high, the cycling stability of the catalyst is high, and the yield of monophenol reaches 28.21%.

Description

technical field [0001] The invention belongs to the technical field of metal solid catalysts, and in particular relates to a carbon-nitrogen material-loaded nickel catalyst with adjustable mesopore diameter and a preparation method and application thereof. Background technique [0002] In today's society, the depletion of fossil resources and the environmental burden caused by their use require society to seek sustainable alternatives, and the large-scale development and efficient use of biomass energy is an effective way to solve the global energy crisis and environmental problems. Great challenge for science and industry. Lignin is a renewable natural aromatic ring polymer composed of phenylpropane structural units. The efficient depolymerization of lignin to prepare monophenolic compounds has great potential in replacing fossil liquid fuels and bulk chemicals. The development of catalysts with high catalytic activity, high product selectivity and good cycle stability is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/10C07C41/01C07C43/23C10G1/00
CPCB01J27/24B01J35/023B01J35/1014B01J35/1019B01J35/1023C07C41/01C10G1/00C07C43/23
Inventor 欧阳新平郭岳钱勇邱学青饶睿恒樊荻谢心怡楼宏铭
Owner SOUTH CHINA UNIV OF TECH
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