Zero-carbon-emission hydrogen production system by methanol water reforming as well as application and hydrogen production method thereof

Abstract

The invention discloses a zero-carbon-emission hydrogen production system by methanol water reforming and application and a hydrogen production method thereof. The hydrogen production system comprises a methanol water storage vessel, a delivery pump, a first heat exchanger, a reformer and a carbon dioxide recovery device, wherein the reformer is provided with a reforming chamber, an electromagnetic heater and a hydrogen purification device; the electromagnetic heater provides heat energy for the reforming chamber; the reforming chamber is used for hydrogen production reaction of methanol and water by reforming to obtain carbon dioxide and hydrogen; carbon dioxide and hydrogen are mixed with water vapor to form high-temperature mixed gas, and the high-temperature mixed gas is delivered into the hydrogen purification device; after purification and separation, hydrogen is delivered out, at the same time carbon dioxide and unreacted water vapor mixed gas are also delivered out, and then carbon dioxide and unreacted water vapor mixed gas are delivered into the carbon dioxide recovery device after passing through the first heat exchanger; the carbon dioxide recovery device is a replaceable modular carbon dioxide recovery device and used for recovering carbon dioxide and part of the water vapor. The zero-carbon-emission hydrogen production system provided by the invention can recover carbon dioxide, has no impact on the environment and causes no harm to the hydrogen production system self and is beneficial for popularization and application in the field of new energy resources such as fuel cell cars.

Description

technical field [0001] The invention relates to the technical field of hydrogen preparation equipment, in particular to a zero-carbon emission methanol-water reforming hydrogen production system and its application and hydrogen production method. Background technique [0002] Hydrogen is one of the most ideal energy sources in the 21st century. When burning the same weight of coal, gasoline and hydrogen, hydrogen produces the most energy, and the product of its combustion is water without ash and waste gas. pollute the environment; while coal and oil combustion mainly produce CO 2 and SO 2 , which can produce the greenhouse effect and acid rain respectively. The reserves of coal and oil are limited, while hydrogen is mainly stored in water, and the only product after combustion is water, which can continuously produce hydrogen and never run out. The distribution of hydrogen is very wide, and water is a large "warehouse" of hydrogen, which contains 11% hydrogen. There is ...

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Problems solved by technology

[0005] However, because carbon dioxide is the main greenhouse gas, the greenhouse effect caused by it affects the original balance between the atmosphere and the biosphere, causing a series of problems closely related to the human living environment and threatening the survival of human beings. Therefore, the above-mentioned methanol water system Hydrogen system directly vents CO 2 Not conducive to environmental protection

And, since CO 2 It can also be developed and utilized as a carbon resource, and has a wide range of application values ​​in various sectors of industry and the national economy, while the CO directly discharged from the above-mentioned methanol water hydrogen production system 2 Usually higher purity CO 2 (The main impurity is water vapor), therefore, it is a waste of resources to discharge directly in this way

In addition, the carbon dioxide directly discharged from the methanol-water hydrogen production system has a relatively high temperature (between 405-570°C), which is likely to affect the operation of various parts of the hydrogen production system, especially when the methanol-water hydrogen production system is applied to fuel cell vehicles and other new In the field of energy, fuel cell vehicles also need to set up special chimneys for emitting carbon dioxide, which is extremely unfavorable for the promotion and application of fuel cell vehicles

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