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Process for preparing high-purity hydrogen through reforming coupling chemical looping of methane-containing combustible gas and application

A chemical reaction and hydrogen production reactor technology, applied in the field of thermochemical hydrogen production, can solve the problems of low product purity and complex preparation process, and achieve the effects of safe and reliable operation, simple operation and improved reaction efficiency

Pending Publication Date: 2021-12-07
HYLOOP TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the existing problems such as complex preparation process of high-purity hydrogen and low product purity, this application provides a device and method for preparing high-purity hydrogen by coupling chemical chain reforming of combustible gas containing methane and a reforming catalyst for combustible gas containing methane. On the one hand, it can prepare High-purity hydrogen, on the other hand can achieve low-cost CO 2 Capture and heat recovery

Method used

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  • Process for preparing high-purity hydrogen through reforming coupling chemical looping of methane-containing combustible gas and application
  • Process for preparing high-purity hydrogen through reforming coupling chemical looping of methane-containing combustible gas and application

Examples

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Embodiment 1

[0075] This embodiment provides a method for preparing high-purity hydrogen by coupling chemical chain reforming of combustible gas containing methane and a reforming catalyst of combustible gas containing methane, such as figure 1 As shown, the methane-containing combustible gas is firstly reformed in a fixed-bed reforming reactor, and then the reformed gas is used as the fuel of the chemical looping hydrogen production reactor to prepare high-purity hydrogen. The specific method is as follows:

[0076] The preparation of the reforming catalyst in the present invention is specifically as follows: firstly, the water absorption rate of the commercial MgO powder is measured to be 4.72mL / gMgO. According to Pt: (Pt+Ni+MgO) mass percentage 1%, Ni: (Pt+Ni+MgO) mass percentage is 10%, take corresponding nickel nitrate hexahydrate and chloroplatinic acid, and corresponding deionized Make a solution with water. After the dissolution is completed, mix the salt solution and MgO powder at...

Embodiment 2

[0089] This example uses the same process as Example 1 to produce hydrogen, the only difference being that hydrogen is produced without the third step of air oxidation of the oxygen carrier.

[0090] The technical effect contrast of table 2 embodiment 1 and embodiment 2

[0091] craft The composition of the tail gas of the reduction reactor after cooling Process heat absorption and release Example 1 100%CO 2

energy self-sustaining Example 2 11% CO, H 2 、CH 4 and 89% CO 2

Need extra energy

[0092] As can be seen from the comparison of Example 1 and Example 2, when the oxygen carrier is iron, iron needs to be further oxidized to obtain better technical effects; There is no need to further oxidize the oxygen carrier;

[0093] After water vapor oxidation, only Fe can be produced 3 o 4 , Fe 3 o 4 When reacting with the reformed gas, part of the reformed gas does not participate in the reduction reaction, resulting in waste of fu...

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Abstract

The invention discloses a process for preparing high-purity hydrogen through reforming coupling chemical looping of methane-containing combustible gas and an application. A reforming reactor, a hydrogen production reactor and a controller are included. The reforming reactor comprises a first gas inlet pipeline and a first gas exhaust pipeline, and the first gas exhaust pipeline is configured to be communicated with the reforming reactor and the hydrogen production reactor; the hydrogen production reactor comprises a second gas inlet pipeline and a second gas exhaust pipeline; the hydrogen production reactor contains an oxygen carrier, and the reforming reactor contains a reforming catalyst; the controller controls gas entering the hydrogen production reactor; the controller is used for switching the gas entering the hydrogen production reactor, so that two chemical reactions are completed in the hydrogen production reactor; or three chemical reactions are completed in the hydrogen production reactor, and the controller controls the reaction to be carried out circularly. The process has the characteristics of high hydrogen purity, low carbon in process, simplicity in operation, high efficiency and the like.

Description

technical field [0001] This article involves but is not limited to the field of clean energy and thermochemical hydrogen production, especially involves but is not limited to a hydrogen production process and application of methane-containing combustible gas. Background technique [0002] As a chemical raw material and energy carrier, hydrogen does not produce CO2 when used compared to other fuels. 2 Therefore, hydrogen energy is an important medium for achieving the goal of global "carbon neutrality" in the future. However, hydrogen usually exists in the environment in the form of compounds such as H 2 O or C n h m , the preparation of elemental hydrogen requires a large input of energy. In addition, hydrogen fuel cells, as an important hydrogen-using unit, generally require hydrogen purity to be ≥99.9%. Therefore, the efficient preparation of high-purity hydrogen technology has become a crucial step to realize the large-scale promotion and application of hydrogen energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/40C01B3/50
CPCC01B3/40C01B3/506C01B2203/0238Y02P20/129
Inventor 王伟玉散·吐拉甫王振通沈威韩萍
Owner HYLOOP TECH (BEIJING) CO LTD
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