Biomethanation system for coupling renewable energy hydrogen production with power plant to capture carbon dioxide

Abstract

The invention relates to a biological methanation system for coupling renewable energy hydrogen production with power plant carbon dioxide capture. The system comprises a renewable energy hydrogen production subsystem used for receiving renewable energy power generation and electrolyzing water to obtain oxygen and hydrogen serving as a substrate gas; a carbon dioxide trapping subsystem which is used for trapping and recovering carbon dioxide serving as substrate gas by taking the flue gas of the power plant as a source; and a H2 / CO2 biological methanation subsystem which is used for generating methane through the metabolism of methanogens by taking hydrogen and carbon dioxide as substrate gases and merging the methane into a natural gas pipeline network. Compared with the prior art, the system has the advantages of better methane reaction effect, higher carbon dioxide conversion efficiency, smaller energy loss, high efficiency, reliability, modular construction, high expansibility, great popularization and application potential and the like. A novel green energy recycling system is constructed by applying various green low-carbon technologies. Thus, deep consumption of renewable energy sources and reduction treatment of carbon dioxide are realized.

Description

technical field [0001] The invention relates to electrolysis of water to produce hydrogen and CO 2 The field of capture and resource utilization of energy, especially involving a biomethanation system that captures carbon dioxide in a renewable energy hydrogen production coupled power plant. Background technique [0002] The green production and utilization of energy is closely related to the improvement of the climate environment, and comprehensively improving resource utilization efficiency and effectively solving the problem of carbon dioxide emission reduction in the energy and power industry is an important part of ensuring the sustainable development of my country's economy and society. Hydrogen production from renewable energy, carbon dioxide capture, and biomethanation synthesis are one of the key technologies for optimizing my country's energy structure, developing renewable energy on a large scale, and promoting green and low-carbon development, helping my country ...

AI Technical Summary

Problems solved by technology

[0012] Chinese invention CN104651412 A of Su Youyong, Li Zhen, Li Simei, Liao Xiaohua, Ma Wenjuan, and Li Guanyan of Kunming University of Science and Technology discloses a carbon dioxide and hydrogen biomethanation method. Methane synthesis is carried out, but the reaction substrate gas is mixed with impurity gas, which leads to the decrease of the overall operation effect of the system and the methane production is not high enough. At the same time, 80% of the CH in the mixed gas 4 The content purity fails to meet the standard of natural gas, lack of purification means and lack of back-end application scenarios

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