CaO guided technology for producing hydrogen through steam reforming and chemical looping combustion of methane

Abstract

The invention discloses a CaO guided technology for producing hydrogen through steam reforming and chemical looping combustion of methane. The technology mainly comprises an air reactor, a fuel reactor, a reforming reactor and a calcinator. Methane and steam are taken as the raw materials for producing hydrogen, an oxygen carrier with NiO as the active component circulates continuously in the air reactor and the fuel reactor, the fuel methane can be completely oxidized by crystal oxygen provided by NiO, reducing-state Ni-based oxygen carrier is oxidized by air in the air reactor, a large quantity of heat released by oxidization is provided for the reforming reactor through wall heat transfer, CaO is added into the reforming reactor for absorbing CO2 generated in reaction, so as to enhance the reforming reaction to generate high-purity hydrogen, CaO adsorbs CO2 so as to form solid CaCO3 in the reforming reactor, and solid CaCO3 is pyrolyzed in the calcinator for CaO regeneration. Compared with the traditional methane steam reforming technology, the technology disclosed by the invention can be used for producing high-purity hydrogen at low temperature under normal pressure; the products at the outlet of the fuel reactor are only CO2 and H2O, so that high-purity CO2 can be obtained by condensing, the separation and collection technologies for CO2 are simplified, and the cost for producing hydrogen is sharply saved.

Description

Technical field: [0001] The invention relates to a CaO-guided methane steam reforming chemical looping combustion hydrogen production process, especially a hydrogen production process with CO 2 Efficient hydrogen production systems and methods for capture and collection. Background technique: [0002] With the increasingly prominent problems of energy crisis and environmental pollution, the development of clean and environmentally friendly new energy has attracted widespread attention. As a clean and efficient energy source, hydrogen is increasingly favored by people. At present, methane steam reforming is the most widely used industrial hydrogen production process. The related technologies of this process are very mature, but the process reaction conditions are harsh (above 800 ° C), and the production process is complicated. Although the reformed gas contains a large amount of hydrogen, further operations such as separation, compression and purification are still require...

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Problems solved by technology

Zhao Haibo and others published in the "Chinese Journal of Electrical Engineering" (Zhao Haibo, Chinese Journal of Electrical Engineering, 2012, Vol. 32, No. 11, pp. 87-94) simulated the chemical chain reforming hydrogen production system, but the system did not consider the content of adsorption-enhanced reforming

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