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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Experimental program
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Effect test

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 method for preparing a cobalt-based catalyst for hydrogen production using CO reduction modification reforming, which includes the following steps: 1) Preparing a catalyst precursor by an impregnation method: impregnating an alumina carrier and a soluble cobalt salt solution to obtain a catalyst precursor , dry the catalyst precursor and then calcine it in a muffle furnace, and grind the burned catalyst precursor into fine particles; 2) CO reduction: Put the ground catalyst precursor into the reactor, and control the reaction conditions to make CO and the catalyst The surface-reduced metallic cobalt reacts to form cobalt carbonyl; through the redistribution of gaseous cobalt carbonyl on the catalyst surface, cobalt species are transported, thereby effectively reducing the particle size of cobalt species on the catalyst surface, which is beneficial to hydrogen production by ethanol steam reforming. progress of the reaction. By controlling the reaction conditions, the present invention causes the catalyst to generate cobalt carbonyl during the CO reduction process, thereby realizing the self-dispersion of cobalt species and improving the dispersion of cobalt on the surface of the catalyst.

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
CPCC01B3/326B01J23/75B01J37/16C01B2203/0227C01B2203/1052C01B2203/1229B01J35/393B01J35/394B01J35/635B01J35/647B01J35/615
Inventor 李娇娇胡勋张丽君贾鹏
Owner UNIV OF JINAN
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