Preparation method of spherical MOFs derived carbon-coated nickel catalyst for catalytic conversion of guaiacol

A guaiacol, catalytic conversion technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrogenation preparation, etc., can solve the problem of low dispersion of metal active centers, guaiac The problems of high conversion cost of phenol and low product selectivity, etc., achieve the effects of high selectivity, easy operation, simple and unique method

Active Publication Date: 2021-02-19
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a simple and unique preparation, which can solve the problem that the dispersion of metal active centers is not high and easy to agglomerate, and to apply it to the hydrodeoxygenation reaction of guaiacol has great advantages. It has good catalytic activity, and has high selectivity to

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of spherical MOFs-derived carbon-coated nickel catalysts for catalytic conversion of guaiacol:

[0025] A method for preparing a spherical MOFs-derived carbon-coated nickel metal catalyst. The preparation method comprises first weighing 0.58g of nickel nitrate hexahydrate and 0.42g of trimesic acid into 70ml of methanol and fully mixing and dissolving to form a green solution. The above solution was transferred to a reactor and sealed, and reacted at 100°C for 24h. After the reaction, it was lowered to room temperature. The obtained product was ultrasonically washed 3 times with methanol, and vacuum-dried at 75 °C for 14 h to obtain a light green solid Ni-MOF. Grind the above-mentioned light green solid Ni-MOF to a uniform powder, put it in a quartz boat, put it into a tube furnace, pass it into a nitrogen atmosphere, heat it at a heating rate of 5°C per minute, stop heating when it reaches 500°C, and keep it warm. 3h, after the calcination was completed, ...

Embodiment 2

[0028] Preparation of spherical MOFs-derived carbon-coated nickel catalysts for catalytic conversion of guaiacol:

[0029] A method for preparing a spherical MOFs-derived carbon-coated metal nickel catalyst. The preparation method comprises first weighing 1.27g of nickel nitrate hexahydrate and 0.50g of trimesic acid into 70ml of methanol and fully mixing and dissolving to form a green solution. The above solution was transferred to a reactor and sealed, and reacted at 150°C for 24h. After the reaction, it was lowered to room temperature. The obtained product was ultrasonically washed 3 times with methanol, and vacuum-dried at 70 °C for 12 h to obtain a light green solid Ni-MOF. Grind the above-mentioned light green solid Ni-MOF to a uniform powder, put it in a quartz boat, put it into a tube furnace, pass it into a nitrogen atmosphere, heat it at a heating rate of 5°C per minute, stop heating when it reaches 450°C, and keep it warm. 3h, after the calcination was completed, ...

Embodiment 3

[0032] Preparation of spherical MOFs-derived carbon-coated nickel catalysts for catalytic conversion of guaiacol:

[0033]A method for preparing a spherical MOFs-derived carbon-coated nickel metal catalyst. The preparation method comprises first weighing 0.87g of nickel nitrate hexahydrate and 0.32g of trimesic acid into 70ml of methanol and fully mixing and dissolving to form a green solution. The above solution was transferred to a reaction kettle, sealed, and reacted at 130° C. for 24 hours. After the reaction, it was lowered to room temperature. The obtained product was ultrasonically washed 3 times with methanol, and vacuum-dried at 60 °C for 10 h to obtain a light green solid Ni-MOF. Grind the above-mentioned light green solid Ni-MOF to a uniform powder, put it in a quartz boat, put it into a tube furnace, pass it into a nitrogen atmosphere, heat it at a heating rate of 5 °C per minute, stop heating when it reaches 400 °C, and keep it warm. After 3 hours, the temperatu...

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Abstract

The invention relates to a preparation method of a catalyst applied to the field of preparation of high-added-value fine chemicals by catalytic conversion of biomass, and in particular, relates to a preparation method of a spherical MOFs derived carbon-coated nickel catalyst for catalytic conversion of guaiacol, wherein the preparation method of the catalyst comprises the following steps that: firstly, trimesic acid is used as an organic ligand; nickel nitrate hexahydrate provides metal ions, methanol is used as a reaction solvent, a spherical Ni-MOF precursor is prepared through a hydrothermal method, then a dried precursor is calcined at high temperature in an inert gas atmosphere, and a carbon-coated metal nickel nanoparticle catalyst is obtained. The catalyst is used for a catalytic conversion reaction of guaiacol in a lignin structural unit, the conversion rate can reach 98%-99.9%, the cyclohexanol in the product is a main product, by-products are few, the selectivity of cyclohexanol can reach 68.2%-72.7%, the main product is widely applied in industry, and the method has a good industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method of a catalyst applied in the field of biomass catalytic conversion to prepare high value-added fine chemicals, in particular to a preparation method of a spherical MOFs-derived carbon-coated nickel catalyst used for catalytic conversion of guaiacol . Background technique [0002] Facing the decrease of non-renewable energy such as petroleum, biomass energy, as a renewable clean energy with large reserves, has received more and more attention. In wood fiber, lignin accounts for about 40% of the total energy. It is a macromolecular compound composed of structural units such as guaiacol. It contains a large number of aromatic ring structures and is the only renewable aromatic ring in nature. Resources, the effective use of lignin can alleviate the world's energy shortage and promote the sustainable development of energy. At present, bio-oil products mainly composed of guaiacol can be obtained by catalytic de...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/08C07C29/19C07C35/08
CPCB01J35/08B01J35/0073B01J23/755C07C29/19C07C2601/14C07C35/08Y02P30/20
Inventor 马玉龙朱颖博孙永刚
Owner NINGXIA UNIVERSITY
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