A kind of preparation method of cobalt-based catalyst for reforming hydrogen production with CO reduction modification

A cobalt-based catalyst, reforming hydrogen production technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of large particle size of cobalt species

Inactive Publication Date: 2019-08-02
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of excessive particle size of cobalt species on the cobalt-based catalyst prepared by the impregnation method, the present invention provides a method for preparing a cobalt-based catalyst for hydrogen production through reduction modification and reforming

Method used

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  • A kind of preparation method of cobalt-based catalyst for reforming hydrogen production with CO reduction modification
  • A kind of preparation method of cobalt-based catalyst for reforming hydrogen production with CO reduction modification
  • A kind of preparation method of cobalt-based catalyst for reforming hydrogen production with CO reduction modification

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Embodiment 1

[0027] 1.H 2 Reduction treatment: Weigh 500 mg of the ground catalyst precursor, put it into the reactor, and control the introduction of H 2 The flow rate is 20ml / min, the reduction treatment is carried out at 500°C for 200min, and the hydrogen is cut off. The particle size and dispersion of metal cobalt particles are shown in Table 1.

[0028] 2. Hydrogen production by steam reforming of ethanol: Introduce nitrogen, the flow rate of nitrogen gas is controlled at 80ml / min, and the aqueous ethanol solution with a molar ratio of water to ethanol of 9:1 is pumped into the reactor at a flow rate of 0.2ml / min at 500°C Under the conditions of the reaction to produce hydrogen. The reaction results are shown in Table 2.

Embodiment 2

[0030] 1.H 2 Reduction treatment: Weigh 500 mg of the ground catalyst precursor, put it into the reactor, and control the introduction of H 2 The flow rate is 100ml / min, the reduction treatment is carried out at 500°C for 200min, and the hydrogen is cut off. The particle size and dispersion of metal cobalt particles are shown in Table 1.

[0031] 2. Hydrogen production by steam reforming of ethanol: Introduce nitrogen, the flow rate of nitrogen gas is controlled at 80ml / min, and the aqueous ethanol solution with a molar ratio of water to ethanol of 9:1 is pumped into the reactor at a flow rate of 0.2ml / min at 500°C Under the conditions of the reaction to produce hydrogen. The reaction results are shown in Table 2.

Embodiment 3

[0033] 1. CO reduction treatment: Weigh 500 mg of the ground catalyst precursor, put it into the reactor, control the flow rate of CO to 20ml / min, and perform reduction treatment at 500°C for 200 minutes to cut off carbon monoxide. The particle size and dispersion of metal cobalt particles are shown in Table 1.

[0034] 2. Hydrogen production by steam reforming of ethanol: Introduce nitrogen, the flow rate of nitrogen gas is controlled at 80ml / min, and the aqueous ethanol solution with a molar ratio of water to ethanol of 9:1 is pumped into the reactor at a flow rate of 0.2ml / min at 500°C Under the conditions of the reaction to produce hydrogen. The reaction results are shown in Table 2.

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Abstract

The invention relates to a preparation method of a hydrogen cobalt-base catalyst with CO reduction modification and reforming. The method includes the following steps of (1) preparation of a catalyst precursor with an impregnation method, wherein the catalyst precursor is obtained after impregnation of an alumina carrier and a dissoluble cobalt salt solution, the catalyst precursor is dried and then calcined in a muffle furnace, and the catalyst precursor after combustion is ground into fine particles; (2) CO reduction, wherein the ground catalyst precursor is put in a reactor, and by control over reaction conditions, CO is reacted with reduced cobalt on the surface of the catalyst to produce carbonyl cobalt; through reallocation of gaseous carbonyl cobalt on the surface of the catalyst, carrying of cobalt species is achieved, so that the particle size of the cobalt species on the surface of the catalyst is effectively reduced, which is beneficial to ethanol water vapor reforming hydrogen production. By the control over the reaction conditions, carbonyl cobalt is produced in the CO reduction process of the catalyst, so that self-dispersal of the cobalt species is achieved, and dispersity of cobalt on the surface of the catalyst is improved.

Description

technical field [0001] The invention relates to the technical field of catalysts for hydrogen production by steam reforming of ethanol, in particular to a method for preparing a cobalt-based catalyst for reforming hydrogen production by reduction modification with CO. Background technique [0002] With the rapid development of society, the consumption of energy is increasing day by day, and the extensive use of traditional fossil energy has caused many serious environmental problems, such as air pollution, acid rain, and global warming. Due to the clean and efficient properties of hydrogen and the advancement of fuel cell technology, the development and application of hydrogen energy has become an important path to solve current environmental problems. Traditional industrial hydrogen production is mainly through steam reforming of natural water gas. The raw materials of this process are derived from fossil fuels, which consume a lot of energy and emit a large amount of CO. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75C01B3/32
CPCB01J23/75B01J35/006B01J35/0066B01J35/1019B01J35/1042B01J35/1061B01J37/16C01B3/326C01B2203/0227C01B2203/1052C01B2203/1229
Inventor 李娇娇胡勋张丽君贾鹏
Owner UNIV OF JINAN
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