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Method for determining content of tar in gas produced during biomass pyrolysis

A technology of biomass pyrolysis and determination method, which is applied in the field of determination of tar content in gas, and can solve problems such as inability to measure and inaccurate determination of tar content

Active Publication Date: 2017-10-10
HUAZHONG NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the determination of tar content in biomass gas is inaccurate or even impossible to measure at present, and develops a method for indirect determination of tar content in gas produced by biomass pyrolysis by gravimetric method

Method used

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  • Method for determining content of tar in gas produced during biomass pyrolysis
  • Method for determining content of tar in gas produced during biomass pyrolysis
  • Method for determining content of tar in gas produced during biomass pyrolysis

Examples

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Effect test

Embodiment 1

[0034]Accurately weigh 2.0293 husks and put them into the pyrolyzed quartz tube 3, then put the quartz tube 3 into the muffle furnace 4, and make the part of the pyrolyzed substance sample 5 temporarily not in the heating zone, and heat through the heating device. The control instrument 6 controls the heating temperature of the muffle furnace. After the heating of the muffle furnace reaches the specified pyrolysis temperature, the inert gas in the inert gas cylinder 1 is passed through the quartz tube 3, and the appropriate flow rate is controlled by the rotameter 2. In order to use the inert gas nitrogen to replace the air in the quartz tube 3 cleanly, to prevent the biomass from being oxidized by air during pyrolysis, after the air in the quartz tube 3 is driven out, stop the introduction of the inert gas, and then put the biomass to be heated The section of quartz tube that decomposes the biomass sample is pushed into the heating zone in the muffle furnace 4, and at the same...

Embodiment 2

[0041] Accurately weigh 2.0247 husks and put them into the pyrolyzed quartz tube 3, then put the quartz tube 3 into the muffle furnace 4, and make the part of the pyrolyzed substance sample 5 temporarily not in the heating zone, and heat it through the heating device. The control instrument 6 controls the heating temperature of the muffle furnace. After the heating of the muffle furnace reaches the specified pyrolysis temperature, the inert gas in the inert gas cylinder 1 is passed through the quartz tube 3, and the appropriate flow rate is controlled by the rotameter 2. In order to use the inert gas nitrogen to replace the air in the quartz tube 3 cleanly, to prevent the biomass from being oxidized by air during pyrolysis, after the air in the quartz tube 3 is driven out, stop the introduction of the inert gas, and then put the biomass to be heated The section of quartz tube that decomposes the biomass sample is pushed into the heating zone in the muffle furnace 4, and at the ...

Embodiment 3

[0045] Accurately weigh 2.0347 husks and put them into the pyrolyzed quartz tube 3, then put the quartz tube 3 into the muffle furnace 4, and make the part that is put into the pyrolyzed substance sample 5 temporarily not in the heating zone, and heat through the heating device. The control instrument 6 controls the heating temperature of the muffle furnace. After the heating of the muffle furnace reaches the specified pyrolysis temperature, pass the inert gas in the inert gas cylinder 1 into the quartz tube 3, and control the appropriate flow rate through the flow meter 2 , so that the air in the quartz tube 3 is completely replaced with inert gas nitrogen to prevent the biomass from being oxidized by air during pyrolysis. The section of quartz tube to be pyrolyzed is pushed into the heating zone of the muffle furnace. At the same time, the generated gas passes through the ice bath to wash the gas cylinder 7, and then passes into the gas cylinder 7 that has exhausted the air b...

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Abstract

The invention relates to a method for determining the content of tar in gas produced during biomass pyrolysis. Biomass mbiomass with accurate mass is pyrolyzed under the set pyrolysis condition, the normal-temperature and normal-pressure gas production volume of biomass pyrolysis gas is obtained, thus, the volume V0 of the pyrolysis gas produced during biomass pyrolysis under the standard condition is obtained through conversion, the volume composition yi of the pyrolysis gas is analyzed and determined, and the gas mass mgas of the pyrolysis gas produced during biomass pyrolysis is calculated; the carbon residue weight mC after biomass pyrolysis is obtained; the tar content motar is calculated according to the following formula shown in the specification. The content of tar in gas produced during biomass pyrolysis or gasification can be determined accurately with the method, so that broad prospects are opened up for development and utilization of bioenergy and increase of the added value of bioenergy.

Description

technical field [0001] The invention belongs to the technical field of energy, and in particular relates to a method for measuring tar content in gas generated by pyrolysis of biomass. Background technique [0002] The tar content in biomass gas is an important process index for the protection of gas generating units and the application of further deep processing of gas, and its measurement accuracy is of great significance. [0003] At present, the determination method of tar content in biomass gas mainly adopts the cold trap method, which is to dissolve the tar in the gas in the organic solvent through the gas washing bottle with organic solvent in the ice bath. In the process, by measuring the weight of the gas washing bottle before and after washing, we can know the amount of tar in the corresponding gas. This method has the following problems: when the gas with tar passes through the organic solvent gas washing bottle, the solvent is taken away by the gas in the form o...

Claims

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Application Information

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IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 吴正舜田江米铁易春雄吴海波
Owner HUAZHONG NORMAL UNIV