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N-doped porous carbon supported metal catalyst, and preparation method and application thereof

A nitrogen-doped porous carbon and metal catalyst technology is applied in the preparation of heterocyclic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc. Low price, excellent catalytic activity and stability, water and thermal stability effects

Active Publication Date: 2017-05-10
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because furfural contains conjugated C=C, C=O and five-membered heterocyclic rings that are easy to open, hydrogenation reactions may occur at different positions, such as C=O hydrogenation to generate furfuryl alcohol; C=O hydrogenation to generate 2- Methyl furan; decarboxylation to generate furan; hydrogenation rearrangement to generate cyclopentanone or cyclopentanol, etc., so it is difficult to control the selectivity of hydrogenation products in the reaction
In addition, bio-based furfural is obtained through hydrolysis of biomass raw materials, and the obtained bio-based furfural is partially dissolved in water, and the later separation and purification will also increase the cost of the product

Method used

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  • N-doped porous carbon supported metal catalyst, and preparation method and application thereof
  • N-doped porous carbon supported metal catalyst, and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation Embodiment 1

[0039] Preparation Example 1: Preparation of nitrogen-doped porous carbon material-supported Pt catalyst

[0040] 1 kg of cleaned bamboo shoots was cut into pieces, heated to dryness in an oven at 70° C., and the obtained solid was ground into powder. Take 2g of powder and add it to 20mL of dilute sulfuric acid with a weight percentage of 1.5%, stir and mix evenly, then move to a hydrothermal reaction kettle, react at 180°C for 8 hours, filter, wash, and dry to obtain a brown solid. Afterwards, the obtained dried solid was calcined in a tube furnace in a nitrogen gas atmosphere, and kept at 550° C. for 5 hours. After the tube furnace was lowered to room temperature, the sample was taken out to obtain a nitrogen-doped porous carbon material with a nitrogen content of about 7.0at% and a specific surface area of ​​180m 2 / g. Take 1.0 g of the prepared nitrogen-doped porous carbon material, mix with 50 mL deionized water, 5 mL H 2 PtCl 6 The solutions (Pt concentration 0.01g / m...

preparation Embodiment 2

[0042] Except that the carbonization temperature was changed to 850° C., the nitrogen-doped carbon material and the Pt-supported catalyst were prepared according to the same method as Preparation Example 1. The elemental analysis results show that the nitrogen content of the material is 2.8at%, and the BET test results show that the specific surface area is about 650m 2 / g, figure 2 It is the TEM picture of the Pt catalyst supported by nitrogen-doped porous carbon prepared according to the present example, such as figure 2 As shown, the Pt nanoparticles in the material are uniformly dispersed on the surface of the carbon material, and the particle size is about 3.5nm.

preparation Embodiment 3

[0043] Preparation Example 3: Preparation of nitrogen-doped porous carbon material-supported Au catalyst

[0044] The nitrogen-doped porous carbon material-supported Au catalyst was prepared according to the same method as in Preparation Example 1.

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Abstract

The invention relates to a catalyst which using N-doped porous carbon as a carrier to support metal. The catalyst is composed of 0.1wt%-30wt% of metal particles and 70wt%-99.9wt% of bio-N-doped porous carbon carrier, and can be used for catalyzing aqueous phase hydrogenation of bio-furfural to highly selectively prepare furfural alcohol or cyclopentanone. The catalyst uses the raw materials which are renewable resources, wide in distribution, green and environmental, simple and easy to obtain, rich in resource, low in cost, free from inactivation when recycled for more than 50 times, and stable to air, water and heat. For example, in reaction of catalyzing the hydrogenation of the furfural to prepare the furfural alcohol, conversion rate of the supported metal catalyst can reach 100% and selectivity of the furfural alcohol is larger than 99% in an aqueous phase system.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and relates to a catalyst that uses nitrogen-doped porous carbon as a carrier to support metals. The catalyst can be used to catalyze the aqueous phase hydrogenation of bio-based furfural to prepare furfuryl alcohol or cyclopentanone with high selectivity, and the catalyst uses Preparation method and use. Background technique [0002] Cyclopentanone is an important fine chemical raw material, which can be used in the production of spices such as alkyl cyclopentanone, spirone, anticancer drugs, herbicides and rubber. At present, the industry mainly uses the downstream products of petroleum cracking as raw materials to produce cyclopentanone by adipic acid decarboxylation cyclization method and cyclopentene oxidation method. The raw materials of these two routes are highly dependent on petroleum, and there are problems such as complicated reaction steps and low theoretical yield (less than 60...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C07D307/44C07C45/59C07C49/297
CPCC07C45/59C07D307/44B01J27/24B01J35/618B01J35/617B01J35/615C07C49/297
Inventor 陈秀芳牟新东费本华刘秀云张波米冰冰
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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