Fuel cell power generation system with partial oxidization, reforming, conversion and direct coupling of chemical chains

Abstract

The invention especially discloses a fuel cell power generation system with partial oxidization, reforming, conversion and directly coupling of chemical chains in view of poor adaptability of solid oxide fuel cells to carbon-bearing fuel. The system follows the scheme of a high-temperature solid oxide fuel cell with reforming, conversion and direct internal coupling of chemical chains, directly arranges the cathode and the anode of the high-temperature solid oxide fuel cell in exhaust spaces at the tail parts of an oxidization reactor and a reduction reactor for reforming and conversion of thechemical chains respectively to form a cathode chamber and an anode chamber which are tightly connected, a hydrogen-rich gas generated by the reforming and conversion of methane chemical chains and oxygen in reaction air are directly supplied to the anode and the cathode of the high-temperature solid oxide fuel cell. The system enables the heat and mass transfer and utilization in the two processes to be efficiently connected, reasonably utilizes low-grade heat energy in the process, reduces the process exergy loss of chemical energy-heat energy exchange, and realizes the cascade utilizationof energy; and meanwhile, the thermodynamic limit in the reaction process is broken through. Finally, the high-efficiency power generation of methane is realized, and carbon dioxide is enriched.

Description

technical field [0001] The invention belongs to the field of environmental protection energy utilization, in particular to a chemical chain partial oxidation reforming conversion direct coupling fuel cell power generation system. Background technique [0002] Global climate change has a profound impact on the survival and development of human beings. It is a major challenge faced by all countries, and no country can stay out of it. Electricity supply based on traditional fossil energy will remain the main source of electricity for countries around the world for a long time to come, but the sustainable supply of energy will face many common challenges in the environment, and industrial processes based on fossil energy will all Facing the common pressure to reduce carbon emissions, it has become an international consensus to change energy utilization patterns, improve energy conversion efficiency, and reduce emissions of harmful substances during energy utilization. Countries...

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Problems solved by technology

[0008] Aiming at the problem of poor adaptability of solid oxide fuel cells to carbon-containing fuels, the present invention proposes to establish a new system of methane chemical chain reforming directly coupled with high-temperature fuel cells for high-efficiency power generation, and solves the following two key scientific problems: (1) promote methane Partial oxidation on the surface of oxygen carrier and in situ catalytic reforming transformation to produce hydrogen-rich gas reaction oxygen migration and evolution of carbon and hydrogen elements; (2) Methane chemical chain reforming directly coupled with heat and mass transfer coupling in high temperature solid oxide fuel cell systems Mechanism and directional regulation of gas and solid components

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