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A kind of biomass hydrothermal carbon carrier catalyst and its preparation method and application

A hydrothermal carbon and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of complex process, high cost, etc. low effect

Active Publication Date: 2022-05-10
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

E.Pérez-Mayoral et al. reviewed the current carbon-based materials and concluded that carbon materials are easy to use chemical or heat treatment to adjust the chemical properties and structure of the material surface. Their main disadvantages are higher cost and more complex technology, thereby delaying the full breakthrough of the industrial level of production

Method used

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  • A kind of biomass hydrothermal carbon carrier catalyst and its preparation method and application
  • A kind of biomass hydrothermal carbon carrier catalyst and its preparation method and application
  • A kind of biomass hydrothermal carbon carrier catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1 different biomass raw materials

[0058] 1. Take 30g of rice husk, bamboo powder, corn stalk powder and eucalyptus sawdust powder raw materials crushed to 80 mesh, mix them with 300ml of deionized water respectively, and add them to a 500ml stainless steel reaction kettle, stir evenly, seal it, and put it into the rotor Let it stir, and place it in a heating mantle, heat up to 240°C at a rate of 2°C / min, react for 30 minutes, cool at room temperature, take out the hydrothermal liquid mixture and perform suction filtration, wash with ethanol and suction filtration once, and then wash with water And suction filtration once, and finally repeat the operation of ethanol cleaning suction filtration-water cleaning suction filtration twice. The dried hydrothermal carbon was dried in an oven at 80° C. for 12 hours to obtain hydrothermal carbon.

[0059] 2. Put the hydrothermal carbon in step 1 in a tube furnace under a nitrogen flow rate of 150ml / min, and pyrolyze ...

Embodiment 2

[0066] Embodiment 2 Acidification, pyrolysis treatment

[0067] 1. Add 30 g of raw rice husk to 300 ml of nitric acid solution with a mass concentration of 45% for acidification and stirring for 5 hours, filter, wash until neutral and dry to obtain the acidified rice husk raw material.

[0068] 2. Mix 30g of rice husk raw material with 300ml of deionized water, add it to a 500ml stainless steel reaction kettle, seal it after stirring evenly, put it into a rotor to stir it, and place it in a heating mantle to raise the temperature at a rate of 2°C / min After reaching 240°C, react for 30 minutes, cool at room temperature, take out the hydrothermal liquid mixture and filter with suction, use ethanol and deionized water to exchange, wash and filter 3 times, then use ethanol to wash and filter once, then wash with water and filter once, Finally, the operation of ethanol cleaning and suction filtration-water cleaning and suction filtration was repeated twice; the dried hydrothermal c...

Embodiment 3

[0077] Embodiment 3pH variable experiment

[0078] 1. Use low-concentration NaOH or HCl aqueous solution to obtain five aqueous solutions with pH=2, 4, 7, 10, and 12 by titration.

[0079] 2. Add 300ml of the five aqueous solutions of step 1 to the high-pressure hydrothermal reaction kettle, and then add 30g of rice husk raw materials crushed to 80 meshes, start from room temperature and heat up to 240°C at a heating rate of 1.5°C / min, and then heat up to 240°C at 240°C Reaction 0.5h. Let cool at room temperature. The hydrothermal mixture obtained after cooling was removed and filtered off with suction. Wash with ethanol and filter once, then wash with water and filter once, and finally repeat the operation of washing with ethanol and filtering with water-washing and filtering twice, and drying at 80°C for 24 hours to obtain five kinds of hydrothermal carbons.

[0080] 3. All the five kinds of hydrothermal carbons in step 2 were placed in a tube furnace, and after pyrolysis...

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Abstract

The invention discloses a biomass hydrothermal carbon carrier catalyst, a preparation method and application thereof. The preparation method of the biomass hydrothermal carbon-supported catalyst comprises the following steps: (1) dispersing the solid biomass raw material in the hydrothermal liquid, then performing a hydrothermal reaction at 150-300°C for 30-240min, washing, and drying to obtain Hydrothermal carbon; hydrothermal carbon is pyrolyzed in nitrogen or inert gas atmosphere at 500-800°C for 30-300min to obtain pyrolyzed hydrothermal carbon; the hydrothermal carbon or pyrolyzed hydrothermal carbon is biomass hydrothermal Carbon carrier; (2) Immerse the biomass hydrothermal carbon carrier in the active metal salt solution for 7‑24h to obtain a catalyst precursor, and use a reducing gas or reducing agent to reduce the active metal in the catalyst precursor to obtain biomass water Thermal carbon-supported catalysts. The method has low cost and wide sources of raw materials, and the prepared biomass hydrothermal carbon carrier catalyst has better catalytic efficiency of hydrodeoxygenation.

Description

technical field [0001] The invention belongs to the field of utilization of catalysts and biomass raw materials, and in particular relates to a biomass hydrothermal carbon carrier catalyst and its preparation method and application. Background technique [0002] In today's world, with the rapid consumption of fossil energy and the increase in energy demand, biomass is considered to be a promising alternative energy due to its low cost of ownership, abundant raw materials and renewable advantages. Pyrolysis is a common method for processing biomass materials and has been extensively studied. Biomass can be converted into bio-oil by pyrolysis under high-temperature and anaerobic conditions, but raw bio-oil cannot be directly used as fuel oil. Because of strong acidity, high oxygen content, low calorific value and instability. Due to the defects of raw bio-oil, the quality of raw oil can be improved by chemical treatment, and hydrodeoxygenation (HDO) can improve bio-oil by re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J23/755C10G45/06
CPCB01J23/755B01J21/18C10G45/06C10G2300/202
Inventor 许细薇蒋恩臣范旭东
Owner SOUTH CHINA AGRI UNIV
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