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Preparation method of catalyst for methane reforming reaction by using carbon dioxide

A carbon dioxide and catalyst technology, applied in the field of catalyst preparation, can solve the problems of increasing catalyst cost and technical difficulty, demanding equipment requirements, etc., and achieve the effect of good industrial application prospects

Inactive Publication Date: 2003-03-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, supercritical drying needs to be carried out under high pressure, which requires harsh equipment and increases the cost and technical difficulty of the catalyst.

Method used

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  • Preparation method of catalyst for methane reforming reaction by using carbon dioxide
  • Preparation method of catalyst for methane reforming reaction by using carbon dioxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: take by weighing 13.7g ZrOCl 2 ·gH 2 O was prepared as a 0.17M aqueous solution, diluted 10 times with 25% ammonia water and placed in a beaker as a precipitant, and slowly dropped into ZrOCl under vigorous stirring 2 aqueous solution, and control the pH value of the solution to 10. After the dropwise addition, continue to stir for 0.5 hours, then age for 2 hours, filter, and wash with deionized water until there is no Cl - Then wash twice with absolute ethanol, after suction filtration or centrifugation, place the alcohol gel in a quartz tube, and pass N at a flow rate of 30ml / min at 270°C 2 Dry for 3 hours to produce ultrafine ZrO 2 carrier. Weigh a certain amount of Ni(NO 3 ) 2 ·6H 2 O, prepared as a 10% aqueous solution, with this Ni(NO 3 ) 2 Solution impregnation of 2g prepared ultrafine ZrO 2 The carrier, after stirring at room temperature for 2 hours, was rotary evaporated to dryness, and dried at 110°C for 12 hours. The dried sample was m...

Embodiment 2

[0015] Embodiment 2: Carrier ZrO 2 Preparation of Ni / ZrO 2 The preparation of catalyst and activity evaluation method are with embodiment 1, and difference is that alcohol gel is in N 2 The drying / calcination temperature in the atmosphere was 650°C. The reaction results showed that the initial conversion rates of methane and carbon dioxide were 84.2% and 85.9% respectively, and the catalyst was used continuously for 200 hours without any decline in activity.

Embodiment 3

[0016] Embodiment 3: Carrier ZrO 2 Preparation of Ni / ZrO 2 The preparation of catalyst and activity evaluation method are with embodiment 1, and difference is that alcohol gel is in N 2 The drying / calcination temperature in the atmosphere was 350°C. The reaction results show that the initial conversion rate of methane and carbon dioxide is close to the equilibrium conversion, and the catalyst has been used continuously for 1100 hours without any decline in activity. The relationship curve of the conversion rate of methane over time is shown in the attached figure 1 shown.

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Abstract

The present invention relates to a prepn. method of catalyst for reforming carbon dioxide to methane: firstly prepare ZrOCl2 solution, use ammonia water as precipitating agent, drip the prepared ZrOCl2 solution into the precipitating agent, stand still for ageing, wash with deionized water, wash with absolute alcohol several times alcoholic gel is obtained, dry and calcine to obtain superfine ZrO2 powder, immerse ZrO2 carrier in nickel nitrate, stir and dry, and calcine to obtain the invented catalyst. The invented method is convenient in operation and simple in equipment.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for carbon dioxide reforming methane to produce synthesis gas, and belongs to the technical field of chemical catalyst preparation. Background technique [0002] Due to ZrO 2 It has acidic, basic, oxidizing and reducing properties at the same time and is widely used in the field of catalytic technology (Materials Chem. Phys., 1985, 133: 47). ZrO 2 It can be used alone as a catalyst (Catal.Today, 1994, 20:185) or as a catalyst carrier. For example: Japanese patent 4613700 report, ZrO 2 It can be used as a catalyst for the hydrogenation of aromatic carboxylic acids to prepare aldehydes, and the hydrogenation of p-tert-butylbenzoic acid and p-toluic acid to prepare the corresponding aldehydes has been industrialized; German patent DE9400513 reported that Pt / ZrO 2 The catalyst used for carbon dioxide reforming methane to produce synthesis gas can be used continuously for 500 hours without chang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/755B01J37/00B01J37/03C01G25/02
Inventor 徐柏庆魏俊梅张法智朱起鸣
Owner TSINGHUA UNIV
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