Alkane cracking and fuel cell compound power generation system

Abstract

The invention pertains to the energy field, in particular to an n-alkane cracking and fuel cell hybrid power system which comprises an alkane catalytic cracking system (A), a palladium membrane filter system (B) and a proton exchange membrane fuel cell power system (C). The invention cracks alkane to generate hydrogen and separates and purifies palladium membrane and the fuel cell is in power connection, thus preparing a set of hybrid system which applies alkane to generate power directly. The system of the invention has high integration degree, is easy to generate power for small and medium movable power stations and is also suitable for generating power for movable power supplies such as vehicles and submarines. The system of the invention reduces the unstable effect of feed gas on the fuel cell, decreases the cost, simplifies preparation technique and avoids poison deactivation of the fuel cell which can be caused by the cracking gas containing CO.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to an alkane cracking and fuel cell compound power generation system, that is, a compound power generation device in which hydrogen is prepared by catalytic cracking of alkane, hydrogen purification is connected with a fuel cell. Background technique [0002] With the development of economy, human beings urgently need to develop environmentally friendly new energy sources. Hydrogen energy, as an efficient and clean secondary energy source, has been highly valued by people as early as the mid-1970s. Recently, hydrogen has found new uses as fuel for fuel cells. Proton exchange membrane fuel cell is a device that directly converts the chemical energy of the fuel into electrical energy without burning, using the noble metal platinum as the electrode catalyst and pure hydrogen as the fuel. It has the advantages of high energy conversion efficiency, no pollution, fast start-up, and hig...

AI Technical Summary

Problems solved by technology

However, because methanol is less electrochemically active than hydrogen, and it is easy to permeate through the proton exchange membrane, the performance of the battery is low

For the second method, the cracking of methanol or ammonia is mainly used to produce hydrogen, but because the cracking gas of methanol contains CO, CO gas has a strong poisoning effect on the platinum catalyst, and a small amount of CO will lead to poisoning of the catalyst. Seriously affect the service life of the battery

Methane, ethane, propane and other alkanes do not produce CO during the direct cracking process, and will not cause poisoning to the catalyst of the fuel cell, but in the process of directly passing into the fuel cell, due to the large amount of raw material gas, it will affect the hydrogen on the catalyst. Adsorption, resulting in large fluctuations in the performance of the fuel cell, and easy to cause waste of fuel gas

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