Microorganism-photoelectrochemistry-thermoelectrochemistry coupling hydrogen production system

Abstract

The invention provides a microorganism-photoelectrochemistry-thermoelectrochemistry coupling hydrogen production system. The system comprises a microbial anode, a photocathode and a thermochemical battery; the thermochemical battery is located between the microbial anode and the photocathode, and ion exchange membranes are arranged between the cathode of the thermochemical battery and the microbial anode and between the anode of the thermochemical battery and the photocathode; the photocathode is connected with the anode of the thermochemical battery through an insulating heat-conducting material, so that the heat of the photocathode is effectively transferred to the anode of the thermochemical battery; the microbial anode and the photocathode are connected to an external circuit and equipment through wires; and the anode and the cathode of the thermochemical battery are directly connected through an external circuit to form an internal loop and a formed voltage drop. The thermochemical cell is coupled into the near microorganism-photoelectrocatalysis system, so that on one hand, the solar energy conversion and utilization efficiency of the system is improved; and meanwhile, the influence of photo-thermal on the microbial anode is reduced.

Description

Technical field [0001] The present invention belongs to the novel energy source technology, and specific relates to microbial-photochemical-thermochemical coupling hydrogen production systems. Background technique [0002] The energy and environment is two major problems facing the world's sustainable development. Energy issues and environmental problems have an interaction, and a large amount of fossil energy has produced severe air and water pollution, and on the other hand, it also leads to a shortage of supply. Develop renewable energy technology has important actual value for energy shortage and environmental pollution. Microbial - Photoelectric Chemical Technology has received wide concern at home and abroad in recent years, which can simultaneously degrade degradation of organic matter in sewage and achieve hydrogen energy generation. During the system operation, the photocathode produces carriers (electrons and holes) under solar light irradiation, producing electrons to ...

AI Technical Summary

Problems solved by technology

However, in the prior art, photoelectrodes can only use high-energy sunlight to excite carriers to maintain the electrode reaction. Most of the light energy is converted into heat in the form of photothermal on the electrode surface and enters the electrolyte, and then radiates to the environment. In the current technology, the light energy conversion utilization rate of the system is low

In addition, since most of the solar energy is converted into heat on the surface of the electrode, the temperature of the electrolyte in the system will rise; since the reaction kinetics of the microbial anode depends on the microorganism, its activity is greatly affected by external conditions such as temperature and pH. The temperature rise of the electrolyte will directly affect the reaction rate of the anode. Excessively high temperature will inhibit the activity of the anode biofilm and even lead to the deactivation of the anode.

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