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Preparation method of catalyst for producing synthetic gas by methane and carbon dioxide reformation

A carbon dioxide and synthesis gas technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, bulk chemical production, etc., can solve the problems of poor stability and achieve high activity and stability

Inactive Publication Date: 2012-10-24
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still problems of poor stability in terms of carbon deposition and deactivation of catalysts, reaction mechanisms, and rate control steps that need to be solved urgently. Therefore, researchers are urgently needed to conduct further research through new experimental methods and new testing techniques, and strive to Find ways to improve the catalytic activity and stability of non-precious metal catalysts through the discussion and research on the reaction mechanism and reaction conditions

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  • Preparation method of catalyst for producing synthetic gas by methane and carbon dioxide reformation

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] Weigh 0.1-50g of nickel nitrate, dissolve it in 10-100ml of deionized water, stir at a constant temperature for 10-30min at 60-90°C, then add 0.1-50g of additives (ammonium molybdate, cobalt nitrate, oxychloride zirconium as an example), heating to fully dissolve the two, evaporate the water, dry in an oven at 110°C for 24h, place the dried solid powder in a muffle furnace, and bake in an air atmosphere at 300-900°C for 3-10h. The calcined catalyst precursor is pressed into tablets and sieved, and the precursor of 40-60 mesh is selected and placed in a fixed-bed quartz tube reactor, and the temperature is programmed to rise to 600-1000°C in a 1:2 ratio of H2:N2 atmosphere. After 0.5-15 hours, the catalyst for the production of synthesis gas by the reforming of methane and carbon dioxide in a fixed bed is obtained, and the methane and carbon dioxide gas in the ratio of 1:1 is fed into the catalyst for activity evaluation. The evaluation results are shown in Table 1.

[0...

Embodiment approach 2

[0021] Weigh 0.1-50g of nickel nitrate, dissolve it in 10-100ml of deionized water, stir at a constant temperature for 10-30min at 60-90°C, then add 0.1-50g of additives (ammonium molybdate, cobalt nitrate, oxychloride Zirconium as an example), stirring at constant temperature for 10-30min to fully dissolve the two, then add 1-50g carrier (take SBA-15 or MEM molecular sieve as an example) under stirring, stir at constant temperature for 10-12 hours, let it stand for 24h, and place it at 60- Evaporate water at 90°C and dry in an oven at 110°C for 24 hours. Other steps and conditions are the same as in Embodiment 1. The evaluation results are shown in Table 2.

[0022] Table 2. Evaluation results of Embodiment 2

[0023] temperature (k)

Embodiment approach 3

[0025] Weigh 0.1-50g of nickel nitrate and 0.1-50g of ammonium molybdate and dissolve them in 10-100ml of deionized water, and stir at a constant temperature for 10-30min at 60-90°C, then add 1-50g of carrier (based on SBA-15 or MEM molecular sieves as an example), stirring at constant temperature for 10-12 hours, standing for 24 hours, evaporating water at 60-90°C, drying in an oven at 110°C for 24 hours, other steps, conditions are the same as in Embodiment 1. The evaluation results are shown in Table 3.

[0026] Table 3. Evaluation results of Embodiment 3

[0027] temperature (k)

[0028] 873

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Abstract

A preparation method of a catalyst for producing synthetic gas by methane and carbon dioxide reformation belongs to the fields of organic chemical industry and catalyst preparation. The preparation method is characterized in that each active ingredient of the catalyst and auxiliary agents are loaded on carries through a one-step or multi-step immersion method, and that catalytical reforming of methane with carbon dioxide is carried at normal pressure to produce synthetic gas. Predecessors after one or multiple immersions are subjected to standing, drying, roasting and reducing, and can be directly used for producing the synthesis gas by reforming of the methane with the carbon dioxide in a fixed bed. With the catalyst prepared by the method in the conditions of 1 atm, 800 DEG C and GHSV=1.2*10<4>h-1, the conversion rate of the methane is maintained at or over 90% when the reforming is carried out for 860h, and the conversion rate of the carbon dioxide is maintained at or over 90% when the reforming is carried out 960h. When the reaction lasts for 1000h, the conversion rate of the methane by using the catalyst is 70%, and the conversion rate of the carbon dioxide by using the catalyst is 86%.

Description

technical field [0001] The invention discloses a method for preparing a catalyst for producing synthesis gas by reforming methane and carbon dioxide. The preparation method adopts a one-step or multi-step impregnation method to load active components and auxiliary agents of the catalyst on a carrier, and belongs to the field of organic chemical industry and catalyst preparation. Background technique [0002] CH 4 and CO 2 Both are cheap and resource-rich carbon-containing compounds in nature, using CH 4 and CO 2 The reforming reaction of synthetic gas to produce syngas is of great significance for alleviating the energy crisis and reducing global warming caused by greenhouse gas emissions. At present, the chemical application of natural gas is mainly divided into two basic ways, one is the direct conversion method, namely the oxidative coupling of methane to ethylene, and the selective oxidation of methane to basic organic chemical raw materials and products such as metha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/40B01J29/00
CPCY02P20/141Y02P20/52
Inventor 黄伟黄健黄涛栾春晖
Owner TAIYUAN UNIV OF TECH
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