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Catalyst for hydrogen production by methane catalytic cracking and preparation method thereof

A technology of methane catalysis and catalyst, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc.

Inactive Publication Date: 2007-09-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ni / CeO 2 / SiO 2 Catalyst and Ni / Ce (1-x) Zr x o 2 / SiO 2 Catalysts used in catalytic cracking of methane to produce hydrogen have not yet been reported

Method used

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  • Catalyst for hydrogen production by methane catalytic cracking and preparation method thereof
  • Catalyst for hydrogen production by methane catalytic cracking and preparation method thereof
  • Catalyst for hydrogen production by methane catalytic cracking and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Preparation of 50wt% Ni / 1wt% CeO 2 / SiO 2 catalyst. According to the preparation method of the present invention, according to the formula (1), (2') and (4), the amount of raw materials used to prepare 4 grams of catalyst is as shown in Table 1. Weigh 0.10 g of analytically pure Ce(NO 3 ) 3 ·6H 2 Dissolve O in 2ml of distilled water and impregnate in 1.96g of 40-60 mesh SiO 2 , placed at room temperature for 12 hours, dried at 80°C to 100°C for 3 hours, and calcined at 400°C for 5 hours to produce CeO 2 / SiO 2 Composite carrier; then weigh 9.91 grams of analytically pure Ni(NO 3 ) 2 6H 2 O dissolved in 5 ml of distilled water, impregnated in CeO 2 / SiO 2 In the composite carrier, place at room temperature for 12 hours, dry at 80°C to 100°C for 10 hours, bake at 300°C for 5 hours, and bake at 600°C for 3 hours to obtain 50wt% Ni / 1wt% CeO 2 / SiO 2 catalyst. The hydrogen production reaction temperature of methane catalytic cracking is 600℃, the reaction press...

Embodiment 2

[0047] Preparation of 20wt% Ni / 20wt% CeO 2 / SiO 2catalyst. According to the preparation method of the present invention, according to the formula (1), (2') and (4), the amount of raw materials used to prepare 4 grams of catalyst is as shown in Table 1. Operation method is the same as embodiment 1, with 2.02 grams of Ce (NO 3 ) 3 ·6H 2 O was dissolved in 3 ml of distilled water and impregnated in 2.40 g of SiO 2 In, made CeO 2 / SiO 2 Composite carrier; 3.96 g Ni(NO 3 ) 2 ·6H 2 O dissolved in 4 ml of distilled water, impregnated in CeO 2 / SiO 2 In the composite support, 20wt% Ni / 20wt% CeO was prepared 2 / SiO 2 catalyst. The hydrogen production reaction temperature of methane catalytic cracking is 575°C, the reaction pressure is normal pressure, and the space velocity of methane is 24,000h -1 Under the condition of , measure the methane conversion rate of different reaction times and list in table 4. The X-ray powder diffraction pattern is shown in line B in Fig. ...

Embodiment 3

[0049] Preparation of 10wt% Ni / 40wt% CeO 2 / SiO 2 catalyst. According to the preparation method of the present invention, according to the formula (1), (2') and (4), the amount of raw materials used to prepare 4 grams of catalyst is as shown in Table 1. The preparation method is the same as in Example 1, with 4.04 grams of Ce (NO 3 ) 3 ·6H 2 O dissolved in 5 ml of distilled water and impregnated in 2.00 g of SiO 2 In, made CeO 2 / SiO 2 Composite carrier; 1.98 g Ni(NO 3 ) 2 ·6H 2 O dissolved in 3 ml of distilled water, impregnated in CeO 2 / SiO 2 In the composite support, 10wt% Ni / 40wt% CeO was prepared 2 / SiO 2 catalyst. The hydrogen production reaction temperature of methane catalytic cracking is 550℃, the reaction pressure is normal pressure, and the space velocity of methane is 24,000h -1 Under the condition of , measure the methane conversion rate of different reaction times and list in table 5.

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Abstract

The present invention is one kind of catalyst for catalytically cracking methane to prepare hydrogen and its preparation process. The catalyst contains Ce and has the structural expression of Ni / Ce(1-x)ZrxO2 / SiO2. When Zr=0 and X=0, the catalyst is Ni / CeO2 / SiO2 and contains Ni in 10-50 wt%, CeO2 in 1-40 wt% and SiO2 the rest. When Zr is not 0 and X=0.2-0.8, the catalyst is Ni / Ce(1-x)ZrxO2 / SiO2 and contains Ni in 10-50 wt%, Ce(1-x)ZrxO2 in 5-50 wt% and SiO2 the rest. Compared with common Ni / SiO2 catalyst for catalytically cracking methane to prepare hydrogen, the catalyst of the present invention has the advantages of small grain of surface active component, high methane converting rate and high catalyst stability.

Description

technical field [0001] The invention relates to a catalyst for producing high-purity hydrogen by catalytic cracking of methane and a preparation method. The catalyst is Ni as the main active component, containing Ce, SiO 2 Supported catalysts. Background technique [0002] Hydrogen is a clean fuel without environmental pollution. The traditional hydrogen production method is hydrocarbon steam reforming method or methane partial oxidation method, CO is produced in these hydrogen production processes, although CO can be converted into hydrogen and CO through shift reaction 2 , but the purity of hydrogen used in fuel cells is high, and its CO content generally needs to be reduced to below 20ppm, which greatly increases the cost of hydrogen purification. [0003] The hydrogen produced by the catalytic cracking of methane contains almost no CO, so it can be directly used in H 2 -O 2 Fuel cells, so the hydrogen production process has attracted great attention at home and abro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C01B3/26
Inventor 季生福李成岳张美丽陈标华
Owner BEIJING UNIV OF CHEM TECH