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Method for co-production of acid and nitrogen-rich carbon-based oxygen reduction catalyst from lignocellulose biomass

A lignocellulosic and biomass technology, applied in the field of lignocellulosic biomass co-production acid and nitrogen-rich carbon-based oxygen reduction catalyst, to achieve the effect of easy control, low cost and developed pore structure

Pending Publication Date: 2022-03-01
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the preparation of porous carbon materials with high nitrogen content through biological process regulation

Method used

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  • Method for co-production of acid and nitrogen-rich carbon-based oxygen reduction catalyst from lignocellulose biomass
  • Method for co-production of acid and nitrogen-rich carbon-based oxygen reduction catalyst from lignocellulose biomass
  • Method for co-production of acid and nitrogen-rich carbon-based oxygen reduction catalyst from lignocellulose biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for utilizing mulberry to co-produce acid and high nitrogen-containing porous carbon materials, comprising the steps of:

[0036] S1: Crush the mulberry tree, mix it with water at a solid-to-liquid ratio of 1:20, and perform pretreatment in a hydrothermal reactor at 200°C for 6 hours.

[0037] S2: The material after pretreatment in step S1 is transferred to the acid production reactor by the sequential batch feeding method, the residence time of the material is 5d, and the poultry manure inoculum (VS 底物 : VS 接种物 =3:1), adjust the pH to 11, run at 55°C for 10 days, and then use a high-speed centrifuge for solid-liquid separation. The collected liquid is rich in volatile organic acids, and the content of organic acids can reach 10g / L.

[0038] S3: Dry the solid part collected in step S2 to a constant weight in an oven at 105° C. to obtain the raw material to be pyrolyzed.

[0039] S4: Combine the raw material to be pyrolyzed obtained in step S3 with K 2 CO 3 ...

Embodiment 2

[0051] A method for co-producing acid and high-nitrogen porous carbon materials by using hybrid pennisetum, comprising the steps of:

[0052] S1: Pulverize Pennisetum hybrida, mix it with water at a solid-to-liquid ratio of 1:15, and perform pretreatment in a hydrothermal reactor at 180°C for 4 hours.

[0053] S2: The material after pretreatment in step S1 is transferred to the acid production reactor by the sequential batch feeding method, the residence time of the material is 5d, and the poultry manure inoculum (VS 底物 : VS 接种物 =3:1), adjust the pH to 10, run at 35°C for 4 days, and then use a high-speed centrifuge for solid-liquid separation. The collected liquid is rich in volatile organic acids, and the content of organic acids can reach 5g / L.

[0054] S3: Dry the solid part collected in step S2 to a constant weight in an oven at 105° C. to obtain the raw material to be pyrolyzed.

[0055] S4: Combine the raw material to be pyrolyzed obtained in step S3 with ZnCl 2 Mix ...

Embodiment 3

[0060] A method for using crop stalks to co-produce acid and high-nitrogen porous carbon materials, comprising the following steps:

[0061] S1: Crush the straw, mix it with water at a solid-to-liquid ratio of 1:20, and perform pretreatment in a hydrothermal reactor at 200°C for 6 hours.

[0062] S2: The material after pretreatment in step S1 is transferred to the acid production reactor by the sequential batch feeding method, the residence time of the material is 5d, and the poultry manure inoculum (VS 底物 : VS 接种物 =3:1), adjust the pH to 10, run at 35°C for 6 days, and then use a high-speed centrifuge for solid-liquid separation. The collected liquid is rich in volatile organic acids, and the content of organic acids can reach 6g / L.

[0063] S3: Dry the solid part collected in step S2 to a constant weight in an oven at 105° C. to obtain the raw material to be pyrolyzed.

[0064] S4: Combine the raw material to be pyrolyzed obtained in step S3 with K 2 CO 3 Mix thoroughly ...

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Abstract

The invention discloses a method for co-production of acid and a nitrogen-rich carbon-based oxygen reduction catalyst from lignocellulose biomass. The method specifically relates to two processes of acid production and charcoal production of lignocellulose biomass. The method comprises the following steps: firstly, carrying out hydrothermal pretreatment on raw materials, then mixing the pretreated raw materials with an inoculum, directionally regulating and controlling the pH value of an acid production system to 10-11, and carrying out acid production. A solid-phase product in the acid production process is used for directional carbon production, the internal structure of biomass is opened due to the action of microorganisms, meanwhile, nitrogen-rich raw material microorganism thalli are introduced, nitrogen is introduced into a carbon skeleton through high-temperature pyrolysis in an inert atmosphere, rich nitrogen-containing functional groups are formed, nitrogen-rich pyrolysis and conversion of lignocellulose biomass are achieved, and the yield of the lignocellulose biomass is improved. Finally, the functional high-nitrogen-content porous carbon material rich in nitrogen-containing functional groups is formed and has a wide application prospect in the field of electro-catalysis, so that high-valued conversion and resource utilization of lignocellulose biomass are realized.

Description

technical field [0001] The invention belongs to the technical field of biomass utilization, and in particular relates to a method for co-producing acid and nitrogen-rich carbon-based oxygen reduction catalyst from lignocellulosic biomass. Background technique [0002] Lignocellulosic biomass is the most abundant biomass resource on earth, including wood (such as eucalyptus, beech, poplar, etc.) Features such as universality and accessibility. Lignocellulosic biomass is mainly composed of cellulose, hemicellulose and lignin, which are strongly meshed by covalent or non-covalent bonds, so that plants have a stable three-dimensional channel structure. This unique pore structure provides convenience for the construction of complex hierarchical porous carbon materials, but at the same time, the strong cross-linking effect makes it difficult to precisely control the morphology and structure of the product. [0003] The doping of heteroatoms (N, P, S, B, F, etc.) is an important ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/40C01B32/05
CPCC12P7/40C01B32/05C12P2201/00C12P2203/00
Inventor 杨改秀李连华孙永明甄峰李颖邢涛袁振宏王忠铭
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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