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Method for preparing hydrogen-blended natural gas by using biomass raw materials

A biomass raw material and natural gas technology, applied in the direction of waste fuel, fermentation, etc., can solve the problems of low and limited energy recovery efficiency, achieve the effects of easy control of hydrogen doping ratio, simple production process, and promotion of application

Inactive Publication Date: 2011-11-23
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The current research results show that carbohydrate raw materials are suitable for anaerobic fermentation to produce hydrogen, and the hydrogen production rate of protein and lipid raw materials is extremely limited, and the hydrogen production process of carbohydrate anaerobic fermentation is accompanied by a large amount of organic acids and other by-products generation, the energy recovery efficiency is low ((Li dong, Yuan Zhenhong, Sun Yongming, Kong Xiaoying, Zhang Yu. Hydrogen production characteristics of the organic fraction of municipal solid wastes by anaerobic mixed culture fermentation. International Journal of Hydrogen Energy, 2009, 34(2), 812-820)

Method used

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  • Method for preparing hydrogen-blended natural gas by using biomass raw materials

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Embodiment 1

[0028] Using slaughterhouse waste as biomass raw material, the anaerobic activated sludge from the biogas tank was treated at 80°C for 60 minutes to obtain the hydrogen-producing inoculum. After the slaughterhouse waste was crushed, it entered the anaerobic hydrogen-producing reaction together with the hydrogen-producing inoculum. control the pH in the anaerobic hydrogen production reactor to be 4.5-6.5 for anaerobic hydrogen production fermentation; the hydrogen production residue discharged from the anaerobic hydrogen production reactor is mixed with anaerobic activated sludge Methane reactor, control the pH in the anaerobic methanogenesis reactor to 6.5-7.8 for anaerobic methanogenesis fermentation; complete the residue of methanogenesis fermentation for environmental standard treatment; H from the anaerobic hydrogen production fermentation reactor 2 , CO 2 、H 2 S, H 2 O(g) mixed gas, remove H through the desulfurization and decarburization process of alcohol amine chemic...

Embodiment 2

[0031] Using food waste as biomass raw material, take the anaerobic activated sludge from the sewage treatment plant and treat it at 100°C for 30 minutes to obtain the hydrogen-producing inoculum. Hydrogen production reactor, control the pH in the anaerobic hydrogen production reactor to 4.5-6.5 for anaerobic hydrogen production fermentation; the hydrogen production residue discharged from the anaerobic hydrogen production reactor is mixed with the anaerobic activated sludge of the sewage treatment plant Enter the anaerobic methanogenesis reactor, control the pH in the anaerobic methanogenesis reactor to 6.5-7.8 to carry out anaerobic methanogenesis fermentation; complete the residue of methanogenesis fermentation and apply it to the farmland after simple processing; from the anaerobic hydrogen production fermentation reaction H 2 , CO 2 、H 2 S, H 2 O(g) mixed gas, through the desulfurization and decarburization process of polyethylene glycol dimethyl ether physical absorpt...

Embodiment 3

[0034] Using sugar wastewater as biomass raw material, the anaerobic activated sludge from the biogas tank was treated at 115°C for 15 minutes to obtain hydrogen-producing inoculum. Sugar wastewater and hydrogen-producing inoculum entered the anaerobic hydrogen-producing reactor to control the The pH in the hydrogen production reactor is 4.5 to 6.5 for anaerobic hydrogen production fermentation; the hydrogen production residue discharged from the anaerobic hydrogen production reactor is mixed with the anaerobic activated sludge of the biogas tank and then enters the anaerobic methane production reactor. The pH in the anaerobic methanogenic reactor is 6.5-7.8 for anaerobic methanogenic fermentation; 2 , CO 2 、H 2 S, H 2 O(g) mixed gas, through molecular sieve pressure swing adsorption desulfurization and decarburization process to remove H 2 S and CO 2 , and then get pure hydrogen through molecular sieve adsorption and deep dehydration; CH from the anaerobic methanogenic fe...

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Abstract

The invention provides a method for preparing hydrogen-blended natural gas by using biomass raw materials, which comprises the following steps: (1) pretreatment of the biomass raw materials; (2) anaerobic hydrogen-generating fermentation and hydrogen purification; (3) anaerobic methane fermentation and methane purification; and (4) gas blending. In the method, the raw materials are widely available, the production process is simple, the anaerobic fermentation hydrogen and methane producing processes are accomplished at normal temperature and under normal pressure, the energy consumption is low, the hydrogen and methane are generated at the same, the production of the hydrogen-blended natural gas is convenient, and the hydrogen mixing ratio can be controlled easily. The method disclosed by the invention is suitable for treating various biomass resources and using the various biomass resources to produce clean energy. When the method disclosed by the invention is used, the fossil energy can be saved, the hydrogen production cost can be lowered, and the use of the hydrogen-blended natural gas and even the use of the hydrogen can be promoted.

Description

technical field [0001] The invention belongs to the field of clean energy development, and in particular relates to a method for preparing hydrogen-doped natural gas by utilizing biomass raw materials. technical background [0002] Hydrogen-enriched natural gas, also known as hydrogen-enriched natural gas (HNG), hydrogen / natural gas mixture, and hythane, is a gaseous fuel made by mixing hydrogen and natural gas in a certain proportion. It can be used as domestic fuel, industrial fuel or distributed through existing compressed natural gas (CNG) filling stations as vehicle fuel. [0003] Adding an appropriate amount of hydrogen to natural gas can increase the combustion speed of the mixture and expand the lean burn limit, thereby improving the thermal efficiency of the engine and reducing emissions. Compared with CNG, hydrogen-doped natural gas with a hydrogen-doped ratio of 20% (calculated by volume percentage, the same below) can reduce the emission of carbon monoxide by 40...

Claims

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Application Information

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IPC IPC(8): C12P3/00C12P5/02
CPCY02E50/343Y02E50/30
Inventor 李东孙永明李连华孔晓英袁振宏
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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