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Method and system for hydrogen production and biochar co-production through biomass pyrolysis gasification

A technology of pyrolysis gasification and biochar, applied in combustible gas purification, combustible gas purification/transformation, hydrogen separation, etc., can solve the problems of energy consumption and treatment cost advantages, catalyst carbon deposition inactivation, and affecting process effectiveness and other problems, to achieve the effect of reducing the dust carried by the gas, uniformly dispersing the gas flow, and solving the large fluctuation of the pressure drop

Active Publication Date: 2022-07-19
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Further patent 201910137183.4 discloses a method for producing hydrogen from biomass. The pretreatment unit is used to wash the alkali metal in the biomass ash to prepare an alkali metal salt solution and spray it to the conversion unit, which is used as a catalyst for the steam shift reforming process. The use of exogenous catalysts is reduced, but this method needs to add an additional pretreatment unit in order to obtain the alkali metal salt solution, and the energy consumption and treatment cost advantages of the whole process are not obvious
[0005] Aiming at the problem that it is difficult to remove tar in biomass first pyrolysis and then steam gasification technology, patent 201610657380.5 discloses a biomass pyrolysis-reforming hydrogen production method, which directly converts the oil and gas products produced after biomass pyrolysis Reforming gasification to obtain hydrogen products saves the process of bio-oil production and re-gasification, and reduces the cost of biomass utilization. However, a large amount of carbon particles carried in bio-oil and gas will put higher demands on the reforming process. requirements, often resulting in rapid carbon deposition and deactivation of the catalyst, which greatly affects the effectiveness of the process

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  • Method and system for hydrogen production and biochar co-production through biomass pyrolysis gasification

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Effect test

Embodiment 1

[0048] The larch molding raw material with a size of 20mm was sent into the microwave pyrolysis reactor, and the microwave power density of the microwave pyrolysis reactor was set to 1 × 10 5 W / m 3 , the temperature is 700 ℃, react in the microwave pyrolysis reactor for 10 minutes, the generated gaseous volatile matter is discharged from the gaseous volatile matter outlet, and the generated biocoke falls into the gasification reactor by gravity; Under the action of passing the activator water vapor and stirring, the biocoke was heated to 800℃, the reaction time was 20 minutes and the power density was 2×10 5 W / m 3 Activated under conditions, the water vapor flow is controlled at 2m 3 / h, the gas product generated during the activation process is discharged from the gaseous volatile outlet, and the generated biochar is divided into two parts, of which the formed biochar as a product accounts for 40wt% of the biochar, with a specific surface area of ​​800m 2 / g, this part of ...

Embodiment 2

[0050] The larch molding raw material with a size of 10mm was sent into the microwave pyrolysis reactor, and the microwave power density of the microwave pyrolysis reactor was set to 2 × 10 5 W / m 3 , the temperature is 800 ° C, the reaction is carried out in the microwave pyrolysis reactor for 20 minutes, the generated gaseous volatiles are discharged from the gaseous volatiles outlet, and the generated biocoke falls into the gasification reactor by gravity; the biological coke falling into the gasification reactor Under the action of introducing activator water vapor and oxygen and stirring, the coke was heated to 850℃, the reaction time was 20 minutes and the power density was 2×10 5 W / m 3 Activated under conditions, the water vapor flow is controlled at 1m 3 / h, the oxygen flow is controlled at 0.1m 3 / h, the gas product generated during the activation process is discharged from the gaseous volatile outlet, and the generated biochar is divided into two parts, of which th...

Embodiment 3

[0052] The larch molding raw material with a size of 10mm was sent into the microwave pyrolysis reactor, and the microwave power density of the microwave pyrolysis reactor was set to 2 × 10 5 W / m 3 , the temperature is 800 ° C, the reaction is carried out in the microwave pyrolysis reactor for 20 minutes, the generated gaseous volatiles are discharged from the gaseous volatiles outlet, and the generated biocoke falls into the gasification reactor by gravity; the biological coke falling into the gasification reactor Under the action of introducing activator water vapor and oxygen and stirring, the coke was heated to 850℃, the reaction time was 20 minutes and the power density was 2×10 5 W / m 3 Activated under conditions, the water vapor flow is controlled at 1m 3 / h, the oxygen flow is controlled at 0.1m 3 / h, the gas product generated during the activation process is discharged from the gaseous volatile outlet, and the generated biochar is divided into two parts, of which th...

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Abstract

The invention discloses a method and a system for producing hydrogen and co-producing charcoal through biomass pyrolysis gasification. The system comprises a microwave pyrolysis reactor, a gasification reactor, a reforming transformation reactor and a combustion regenerator, the method comprises the following steps: feeding a biomass raw material into a microwave pyrolysis reactor for pyrolysis to generate gaseous volatile components and biochar; activating the biochar in a gasification reactor to obtain a biochar product; and the generated gaseous volatile component enters a reforming transformation reactor to react to obtain a hydrogen product. According to the method, reaction characteristics and product distribution characteristics in the pyrolysis process are fully utilized, synchronous production of high-quality hydrogen and activated carbon is realized through controllable coupling of pyrolysis, gasification and reforming transformation processes, the economical efficiency of the process is greatly improved, and the method has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and in particular relates to a biomass pyrolysis gasification method and system. Background technique [0002] Hydrogen energy is a new type of high-quality and clean energy. Compared with conventional energy sources such as oil, natural gas, and coal, it can effectively reduce the emission of greenhouse gases and toxic substances such as sulfur, nitrogen, and particulate matter. An important sign of the transition to the era of the "hydrogen economy". However, hydrogen in nature mostly exists in the form of compounds, which requires other energy sources to be prepared. At present, about 96% of the hydrogen source comes from fossil fuels, but fossil energy is not renewable. There is an urgent need to develop sustainable and environment-friendly hydrogen production technology, and the use of cheap biomass resources to replace fossil raw materials to produce hydrogen will be the only way. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/64C10J3/72C10J3/84C10K1/20C10K1/26C01B3/56
CPCC10J3/64C10J3/723C10J3/84C10K1/20C10K1/26C10K1/003C01B3/56C10J2300/0916C10J2300/0906C10J2300/0909C10J2300/0976C10J2300/1603C10J2300/1807
Inventor 王鑫吴斯侃张长安肖彬张彪王博宋永一
Owner CHINA PETROLEUM & CHEM CORP
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