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Catalyst for preparing synthetic gas by reforming methane and carbon dioxide and preparation method thereof

A carbon dioxide and catalyst technology, applied in the field of NiO/γ-Al2O3 catalyst and its preparation, can solve the problems of metal particle migration, inability to form strong interaction, difficulty in breaking high aggregation degree, etc., and achieve the effect of long stability and service life

Inactive Publication Date: 2016-10-26
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 102188976A has reported that catalysts prepared by impregnation are affected by the surface tension of the impregnation solution and the solvation effect during the drying stage. The metal active component precursors are often deposited on the surface of the carrier in the form of aggregates, which are difficult to break during the subsequent roasting process. This high degree of aggregation; in addition, the active metal species and the carrier cannot form a strong interaction after impregnation, and high-temperature calcination easily leads to the migration and aggregation of metal particles to form large metal grains
The occurrence of the above two phenomena directly leads to poor dispersion of the active components of the catalyst, which in turn affects the performance of the catalyst and the repeatability of the preparation, which virtually increases the production cost of the entire process.

Method used

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  • Catalyst for preparing synthetic gas by reforming methane and carbon dioxide and preparation method thereof
  • Catalyst for preparing synthetic gas by reforming methane and carbon dioxide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Weigh 6g of urea and dissolve it in deionized water to prepare a 40ml solution, add 5g of alumina to the above solution, and stir at 100°C for 12h;

[0023] Weigh 12g of nickel nitrate and dissolve it in deionized water to prepare 20ml of solution, add it to the above-mentioned urea solution containing alumina, shake well and soak for 1-2h, put it into the reaction kettle, and crystallize it at 110°C for 14h, Cool and filter, wash with deionized water, and dry at 80°C to obtain a catalyst precursor.

[0024] Put the precursor in a muffle furnace and roast at 500°C for 8 hours, then cool to room temperature to obtain the desired catalyst NiO / γ-Al for reforming methane and carbon dioxide to produce synthesis gas 2 o 3 .

[0025] 50 mg of the catalyst was taken, mixed evenly with 50 mg of quartz sand, and packed into a fixed-bed reactor to carry out reforming experiments of methane and carbon dioxide. Into the CO in two ways 2 and CH 4 raw material gas, the total spac...

Embodiment 2

[0027] Weigh 8g of urea and dissolve it in deionized water to prepare a 30ml solution, add 5g of alumina to the above solution, and stir at 80°C for 13h;

[0028] Weigh 12g of nickel sulfate and dissolve it in deionized water to prepare 25ml of solution, add it to the above-mentioned urea solution containing alumina, shake well and soak for 1h, then put it into the reaction kettle, crystallize at 120°C for 13h, cool and filter , washed with deionized water, and dried at 80°C to obtain a catalyst precursor.

[0029] Put the precursor in a muffle furnace and roast at 700°C for 4h, then cool to room temperature to obtain the desired catalyst NiO / γ-Al for reforming methane and carbon dioxide into synthesis gas 2 o 3 .

[0030]Take 50 mg of the catalyst, mix it with 50 mg of quartz sand evenly, and carry out the methane carbon dioxide reforming experiment. CH was measured by gas chromatography 4 The conversion rate reaches 63%, CO 2 The conversion rate reached 78%, and the rea...

Embodiment 3

[0032] Weigh 4g of urea and dissolve it in deionized water to prepare a 20ml solution, add 5g of alumina to the above solution, and stir at 60°C for 12h;

[0033] Weigh 20g of nickel sulfate and dissolve it in deionized water to prepare 50ml of solution, add it to the above-mentioned urea solution containing alumina, shake well and soak for 1h, then put it into the reaction kettle, crystallize at 130°C for 10h, cool and filter , washed with deionized water, and dried at 80°C to obtain a catalyst precursor.

[0034] Put the precursor into a muffle furnace and roast at 800°C for 3.5h, then cool to room temperature to obtain the desired catalyst NiO / γ-Al for reforming methane and carbon dioxide into synthesis gas 2 o 3 .

[0035] Take 50 mg of the catalyst, mix it with 50 mg of quartz sand evenly, and carry out the methane carbon dioxide reforming experiment. CH was measured by gas chromatography 4 The conversion rate reaches 78%, CO 2 The conversion rate reached 65%, and th...

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Abstract

The invention provides a catalyst for preparing synthetic gas by reforming methane and carbon dioxide and a preparation method thereof. The catalyst related herein is obtained by: synthesizing nickel-containing hydrotalcite lamellar precursor NiAl-LDH / Gamma-Al2O3 in situ in surface pores of a support, and calcining at 500-800 DEG C; a chemical formula of the catalyst is NiO / Gamma-Al2O3, wherein NiO is distributed evenly on the inner surface of the Gamma-Al2O3 support, Ni accounts for 0.5-5% of total weight of the catalyst, and the support is spherical Gamma-Al2O3, having a specific surface area of 100-300 m<2> / g and a particle size of 0.84-2 mm.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a NiO / γ-Al used for reforming methane and carbon dioxide to produce synthesis gas 2 o 3 Catalyst and method for its preparation. Background technique [0002] With global warming, the emission of carbon dioxide has attracted the attention of the international community. Reforming of methane and carbon dioxide to synthesis gas using CH 4 and CO 2 As a reactant, it can not only solve the problem of greenhouse gas emissions, but also make CO 2 Turning waste into treasure. Reformed CO and H 2 It can be directly used in Fischer-Tropsch synthesis to produce high value-added chemicals. Furthermore, reforming of methane and carbon dioxide is a reversible and strongly endothermic process that can serve as an energy transport system. Therefore, the research on this reaction is of great significance. [0003] Scholars at home and abroad have done a lot of theoretical and practica...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/10
CPCB01J23/755B01J23/007B01J35/40B01J35/615
Inventor 姚元根崔国静周张锋乔路阳宗珊珊吴小满吴娟
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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