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Structured oxygen carrier for hydrogen production by chemical-looping methane reforming and preparation method thereof

A technology for chemical chain methane, reforming hydrogen production, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of thermal shock, loss, and low strength of perovskite oxygen carriers, etc. To achieve the effect of strong stability, not easy to fall off, improve response speed and energy efficiency

Pending Publication Date: 2022-07-22
ZHEJIANG ZHENENG TECHN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the perovskite oxygen carrier material has good reaction selectivity and reactivity, but the perovskite oxygen carrier has the disadvantage of low strength, and the heat exchange during the reaction will bring obvious thermal shock to the oxygen carrier, and the air flow Washing also brings loss

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  • Structured oxygen carrier for hydrogen production by chemical-looping methane reforming and preparation method thereof

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Embodiment 1

[0025] Embodiment 1 of the present application provides a structured oxygen carrier for hydrogen production by chemical chain methane reforming, including a honeycomb carrier and an oxygen carrier active component, the oxygen carrier active component is loaded with a mass fraction of 10% to 30%, and the rest is honeycomb carrier; the honeycomb carrier contains alumina, silicon oxide and ferromagnetic materials, and the mass fractions are respectively 30% to 35%, 40% to 55%, and 10% to 30%; the active component of the oxygen carrier contains perovskite oxide and CeO 2 Active component, perovskite oxide is Ba-Sr-Co-based perovskite, CeO 2 Cerium oxide, perovskite oxide and CeO with a particle size of 100-150 mesh 2 The mass fractions are 10% to 40% and 60% to 90%, respectively.

Embodiment 2

[0027] On the basis of Embodiment 1, Embodiment 2 of the present application provides a method such as figure 1 The preparation method of the structured oxygen carrier for hydrogen production by chemical chain methane reforming comprises the following steps:

[0028] (1) Prepare a mixed solution of Ba, Sr and Co nitrates, the molar concentrations of Ba, Sr and Co are 0.03mol / L, 0.07mol / L, 0.1mol / L, and then add appropriate citric acid to the nitrate solution and ethylenediaminetetraacetic acid, so that the concentrations of citric acid and ethylenediaminetetraacetic acid in the mixed solution are respectively 0.3mol / L and 0.2mol / L, and then ammonia water is added to make the pH value of the mixed solution 8-9;

[0029] (2) CeO with a particle size of 100-150 mesh at a ratio of 51.6g / L 2 The powder is added to the mixed solution, and the mixed solution is heated to about 85°C under stirring conditions, and the heating and evaporation are continued until a sol-like product is f...

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Abstract

The invention relates to a preparation method of a structured oxygen carrier for hydrogen production by chemical-looping methane reforming, which comprises the following steps: preparing a nitrate solution containing Ba ions, Sr ions and Co ions, adding citric acid and ethylenediamine tetraacetic acid into the obtained mixed solution, and mixing; adding CeO2 powder with a set particle size into the prepared precursor mixed solution, heating the precursor mixed solution added with the CeO2 powder to a set temperature under a stirring condition, and continuously heating and evaporating until a sol-like product is formed; the method has the beneficial effects that preparation and coating modes of active components of the structured oxygen carrier are researched, and a honeycomb carrier material is adjusted, so that efficient and stable chemical-looping methane reforming hydrogen production reaction under induction heating is realized; by adopting an induction heating mode, the response speed and the energy utilization rate in the reaction process are improved, and meanwhile, the oxygen carrier has the advantages of high stability and good thermal shock resistance; and the oxygen carrier active component has good reaction activity and is not easy to fall off.

Description

technical field [0001] The invention belongs to the field of energy chemical devices, and in particular relates to a structured oxygen carrier for hydrogen production by chemical chain methane reforming under induction heating conditions and a preparation method. Background technique [0002] China is transforming its energy structure from high-carbon to low-carbon and then to zero-carbon. In this context, energy structure reform and the development of low-carbon renewable energy have become an inevitable trend. Fossil energy will continue to be the main energy source for the whole society for a long time due to its dominant position in global energy consumption, and the proportion of natural gas has been gradually increasing in recent years. If natural gas can be converted into zero-carbon energy and chemicals, it can not only reduce the carbon emissions of society, but also provide chemical raw materials at the same time. Therefore, in the field of clean conversion of fo...

Claims

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Application Information

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IPC IPC(8): C01B3/40C04B35/18B01J35/10
CPCC01B3/40C04B35/18C04B2235/3229C04B2235/3275C04B2235/3213C04B2235/40C01B2203/1082B01J35/60
Inventor 孙士恩丁浩然祁志福骆周扬韩龙秦刚华
Owner ZHEJIANG ZHENENG TECHN RES INST