Nitrogen-doped porous carbon-supported bimetallic catalyst and preparation method and application thereof

A technology of nitrogen-doped porous carbon and bimetallic catalysts, which is applied in catalyst activation/preparation, chemical instruments and methods, preparation of hydroxyl compounds, etc. It can solve the problems of low efficiency, unfavorable catalyst synthesis, cumbersome steps, etc., and achieves broad application prospects , excellent catalytic activity, simple separation effect

Active Publication Date: 2019-07-12
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the reported literature, heterogeneous catalysts are mainly synthesized by multiple steps such as coprecipitation method and equal volume impregnation method. The steps are cumbersome and the efficiency is low, which is not conducive to the synthesis of catalysts required for industrial scale-up in the future.

Method used

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  • Nitrogen-doped porous carbon-supported bimetallic catalyst and preparation method and application thereof
  • Nitrogen-doped porous carbon-supported bimetallic catalyst and preparation method and application thereof
  • Nitrogen-doped porous carbon-supported bimetallic catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0037] Preparation Example 1: One-pot synthesis of nitrogen-doped porous carbon material-supported Ru-W catalyst (Ru-W / NC-800)

[0038] 1 kg of cleaned bamboo shoots was cut into pieces, dried, and the solids obtained were ground into powders. Take 2g powder, mix with 18mL deionized water, 0.28mL RuCl 3 Mix the solution (5wt%), add 0.0972g ammonium metatungstate (AMT), mix the above mixture evenly, transfer it to a hydrothermal kettle, react at 180°C for 6h, filter, wash, and dry to obtain a brown solid. Then put the obtained solid in a tube furnace and bake it to 800°C under a nitrogen atmosphere, and keep it warm for 1 hour to obtain a nitrogen-doped porous carbon-supported catalyst, represented by Ru-W / NC-800.

[0039] figure 1 It is the TEM image of the Ru-W catalyst supported by nitrogen-doped porous carbon prepared according to the present example, such as figure 1 As shown, the Ru nanoparticles in the material are uniformly dispersed on the surface of the carbon mate...

preparation Embodiment 4

preparation Embodiment 2

[0040] Preparation Example 2: Preparation of Multi-step Synthesis of Nitrogen-doped Porous Carbon Material Supported Ru-W Catalyst (HRu-W / NC)

[0041] Take 2g of bamboo powder, mix evenly with 18mL of deionized water, transfer to a hydrothermal kettle, react at 180°C for 6h, filter, wash, and dry to obtain a brown solid hydrothermal carbon.

[0042] Take 1g of hydrothermal carbon, mix with 4mL deionized water, 0.28mL RuCl 3 The solution (5wt%) was mixed with 0.0972g AMT, and stood at 25°C for 3h. Dry at 50°C for 12h, grind the above mixture and put it in a tube furnace for roasting under nitrogen atmosphere, keep it at 800°C for 1 hour. After the tube furnace dropped to room temperature, the sample was taken out to obtain a nitrogen-doped porous carbon-supported catalyst synthesized by a multi-step method, represented by HRu-W / NC.

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Abstract

The invention discloses a thermometal-nitrogen-doped carbon-based bifunctional catalyst synthesized through a one-pot method by using nitrogen-doped bio-based porous carbon as a carrier, and a preparation method and application thereof. The catalyst can be used for catalyzing efficient selective hydrogenation of biomasses such as bio-based sorbitol, xylitol, cellulose, lignocellulose, etc. for thepreparation of low-carbon alcohol such as diol, etc. since cheap and renewable biomasses are used as raw materials for preparation of a porous nitrogen-dope carbon material without adding nitrogenousorganic compounds as the nitrogen-doped element, the catalyst of the invention is green and environmentally-friendly and the cost is low. When being used for selective hydrogenation of biomasses in awater-phase system, the prepared metal supported catalyst has excellent of catalytic activity, stability and selectivity. In addition, the separation of products and the catalyst is simple; yield ofglycol and propylene glycol in the products can reach up to 85% and above; the reaction steps are less, the condition is mild, and the operation is simple; and the catalyst has a broad application prospect.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and relates to a bifunctional catalyst synthesized by a one-pot method using nitrogen-doped bio-based porous carbon as a carrier, and the catalyst is used to catalyze bio-based sorbitol and xylose Alcohol, cellulose, lignocellulose and other biomass are efficiently and selectively hydrogenated to prepare diol and other low-hydric alcohols, and the preparation method and application of the catalyst. Background technique [0002] Ethylene glycol and propylene glycol, as a kind of high value-added chemicals, are widely used in synthetic polyester resin, cosmetics, medical industry and pharmaceutical industry and other fields. At present, the industry mainly uses the downstream products of petroleum cracking and coal as raw materials to produce ethylene glycol and propylene glycol through harsh conditions such as traditional catalytic hydrogenolysis. The raw materials of traditional industrial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J35/10B01J37/10C07C29/00C07C31/20
CPCB01J27/24B01J37/10B01J35/006B01J35/0073B01J35/1019B01J35/1023C07C29/00C07C31/202C07C31/205Y02P20/52
Inventor 陈秀芳李庆林徐国强刘秀云李正
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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