Fuel cell power generation system for hydrogen production by methanol reforming of trace CO

Abstract

The invention discloses a fuel cell power generation system for hydrogen production by methanol reforming of trace CO. The fuel cell power generation system comprises a control system, and a liquid storage bin, a liquid outlet pump, a vaporizer, a reactor, a condenser and a low-temperature proton exchange membrane fuel cell which are sequentially connected through pipelines. The fuel cell power generation system also comprises a plate heat exchanger; a catalyst for hydrogen production by methanol reforming is arranged in the reactor; the catalyst for hydrogen production by methanol reforming contains an active component containing NiO and Cr2O3, a carrier containing ZrO2 and Al2O and an auxiliary agent. The fuel cell power generation method for hydrogen production by methanol reforming oftrace CO and the low-temperature proton exchange membrane fuel cell are cooperatively used to avoid the step of hydrogen purification and the device module thereof, to be capable of using the mature low-temperature proton exchange membrane fuel cell system for power generation, and the device system is low in cost and reliable in performance, and can be applied to the fields of automobiles, shipsand base station power sources in a large scale.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a hydrogen-producing fuel cell power generation system for methanol reforming with a small amount of CO. Background technique [0002] Hydrogen is an element with abundant reserves and high combustion calorific value on the earth. After burning, only water will be produced without any other pollution products. It is the cleanest energy source. Therefore, hydrogen energy is also called the ultimate energy source for mankind. A hydrogen fuel cell is a device that converts chemical energy directly into electrical energy without going through the Carnot cycle of hydrogen and oxygen, and the energy conversion efficiency can reach more than 60%. The emergence of fuel cell technology makes hydrogen the best energy source to replace fossil energy. In recent years, with the development of proton exchange membrane fuel cells, especially the rapid development of its applicat...

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Problems solved by technology

Hydrogen production by methanol reforming has attracted widespread attention due to the characteristics of easy access to raw material methanol and easy decomposition to produce hydrogen. For example, the Chinese invention patent with application number CN201510476342.5 discloses a generator for hydrogen production by methanol water reforming, including an electronic control system , Methanol water inlet system, hydrogen production system and power generation system. The electric control system includes a control board, a power supply device and a power output port. The control board controls the methanol water inlet system, hydrogen production system and power generation system. It uses methanol reforming The hydrogen production device and the low-temperature proton exchange membrane fuel cell are the main structure of the power generation system, but the low-temperature proton exchange membrane fuel cell used in this invention requires the concentration of CO to be less than 2ppm. The produced hydrogen contains a high concentration of CO. Since CO is easy to poison the catalyst of the proton exchange membrane fuel cell, the hydrogen obtained from the reforming of methanol must be purified to remove CO and then sent to the proton exchange membrane fuel cell for use. The advanced hydrogen purification device not only increases the cost of the fuel cell power generation system, but also increases the volume space of the system equipment and the complexity of the system control, making the fuel cell power generation system unable to be used in occasions with high space requirements such as automobiles

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