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Preparation method of nitrogen-doped carbon catalyst and application of nitrogen-doped carbon catalyst in bio-oil hydrogenation

A catalyst and bio-oil technology, applied in catalyst activation/preparation, preparation of organic compounds, preparation of carbon-based compounds, etc., can solve the problem that the active metal loading, dispersion degree, and stability are difficult to accurately control, biomass-based nitrogen doping The problems of less application of carbon catalysts and high cost of raw materials can achieve the effects of easy control, low cost and simple operation

Pending Publication Date: 2020-04-21
武汉热解无限能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current research is mainly to prepare nitrogen-doped carbon materials through nitrogen-containing modulant compounds. The cost of raw materials is high, and the loading, dispersion and stability of active metals on the surface of nitrogen-doped carbon materials are still difficult to accurately control. Biomass-based Nitrogen-doped carbon catalysts are less used in bio-oil hydroconversion

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  • Preparation method of nitrogen-doped carbon catalyst and application of nitrogen-doped carbon catalyst in bio-oil hydrogenation

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Embodiment 1

[0040] The embodiment of the present invention describes a method of using biomass to prepare nitrogen-doped carbon catalyst, and the method specifically includes the following steps:

[0041] S1: After pulverizing and drying the sawdust waste, it is fully mixed with KAC green activator and urea by dipping. The ratio of the three is 1:1:1. After soaking for 24 hours, evaporate the water in it at 100°C to obtain mixed samples;

[0042] S2: Put the mixed sample in step S1 into a fixed bed reactor to perform rapid pyrolysis activation nitrogen doping reaction under an inert atmosphere. The reaction temperature is 500°C, the reaction time is 60min, the reaction atmosphere is argon, and the gas flow rate is 200mL / min, biomass interacts with green activator and urea to obtain pyrolytic carbon with developed porosity and rich in nitrogen;

[0043] S3: Put the pyrolytic carbon obtained in step S2 into 1mol / L hydrochloric acid solution and soak for 24h, then rinse with deionized wate...

Embodiment 2

[0048] S1: After pulverizing and drying the sawdust waste, it is fully mixed with KAC green activator and urea by dipping. The ratio of the three is 1:1:1. After soaking for 24 hours, evaporate the water in it at 100°C to obtain mixed samples;

[0049] S2: Put the mixed sample in step S1 into a fixed bed reactor to perform rapid pyrolysis activation nitrogen doping reaction under an inert atmosphere. The reaction temperature is 500°C, the reaction time is 30min, the reaction atmosphere is argon, and the gas flow rate is 200mL / min, biomass interacts with green activator and urea to obtain pyrolytic carbon with developed porosity and rich in nitrogen;

[0050] S3: Put the pyrolytic carbon obtained in step S2 into 1mol / L hydrochloric acid solution and soak for 24h, then rinse with deionized water until the filtrate is neutral to remove the activator in the pyrolytic carbon, and obtain nitrogen-doped carbon after drying Material;

[0051] S4: Immerse the nitrogen-doped carbon o...

Embodiment 3

[0055] S1: After pulverizing and drying the sawdust waste, it is fully mixed with KAC green activator and urea by dipping. The ratio of the three is 1:1:1. After soaking for 24 hours, evaporate the water in it at 100°C to obtain mixed samples;

[0056] S2: Put the mixed sample in step S1 into a fixed bed reactor to perform rapid pyrolysis activation nitrogen doping reaction under an inert atmosphere. The reaction temperature is 500°C, the reaction time is 30min, the reaction atmosphere is argon, and the gas flow rate is 200mL / min, biomass interacts with green activator and urea to obtain pyrolytic carbon with developed porosity and rich in nitrogen;

[0057] S3: Put the pyrolytic carbon obtained in step S2 into 1mol / L hydrochloric acid solution and soak for 24h, then rinse with deionized water until the filtrate is neutral to remove the activator in the pyrolytic carbon, and obtain nitrogen-doped carbon after drying Material;

[0058] S4: Immerse the nitrogen-doped carbon o...

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Abstract

The invention discloses a preparation method of a nitrogen-doped carbon catalyst and an application of the nitrogen-doped carbon catalyst in bio-oil hydrogenation. The preparation method of the nitrogen-doped carbon catalyst loaded with the active metal comprises the following steps: crushing and drying biomass waste, uniformly mixing the waste powder, an eco-friendly activating agent and urea, carrying out a pyrolysis activation nitrogen doping reaction process in an inert atmosphere to a nitrogen-doped carbon material with a developed pore structure and rich active functional groups under the synergistic effect of the biomass, the eco-friendly activating agent and the urea, and respectively capturing and anchoring active metals by utilizing developed pores and active nitrogen-containingfunctional groups of the nitrogen-doped carbon so that a stable coordination bond is formed and the highly-dispersed active metal-loaded nitrogen-doped carbon catalyst is obtained. The catalyst is applied to the catalytic hydrogenation conversion process of bio-oil derivatives, so that cyclohexanone with high selectivity can be obtained and the high-value nitrogen-doped carbon catalyst and high-efficiency and high-quality catalytic hydrogenation conversion of bio-oil can be simply and efficiently prepared from biomass.

Description

technical field [0001] The invention relates to the field of biomass utilization, in particular to a preparation method of a nitrogen-doped carbon catalyst and its application in bio-oil hydrogenation. Background technique [0002] Biomass is the only renewable carbon source, and its conversion into high-addition fuels and chemicals is an important research hotspot at present. However, the bio-oil obtained by direct pyrolysis of biomass has complex components, including hundreds or thousands of organic compounds, and it is difficult to Direct high-value utilization. Bio-oil catalytic hydrogenation conversion can obtain a large number of high-value chemical raw materials, and bio-oil catalytic hydrogenation usually requires heterogeneous catalysts, commonly used as noble metal catalysts. However, noble metal catalysts are prone to agglomeration, which reduces their catalytic activity. Therefore, it is usually necessary to support noble metal catalysts on porous materials wit...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C07C45/00B01J37/02B01J37/08B01J37/00
CPCB01J27/24B01J37/0018B01J37/084B01J37/0209C07C45/006C07C2601/14B01J35/618C07C49/403
Inventor 陈伟
Owner 武汉热解无限能源科技有限公司
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