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Preparation method of highly-dispersed Ni catalyst used for producing synthesis gas through carbon dioxide reforming of methane

A carbon dioxide and catalyst technology, applied in the fields of natural gas chemical industry and catalyst manufacturing engineering, can solve the problems of complex preparation process and no stable results

Inactive Publication Date: 2016-03-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the Ni-SBA15 / Al 2 o 3 / FeCrAl catalyst, the preparation process is extremely complicated, and there is no clear stability result

Method used

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  • Preparation method of highly-dispersed Ni catalyst used for producing synthesis gas through carbon dioxide reforming of methane
  • Preparation method of highly-dispersed Ni catalyst used for producing synthesis gas through carbon dioxide reforming of methane
  • Preparation method of highly-dispersed Ni catalyst used for producing synthesis gas through carbon dioxide reforming of methane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of carrier SBA-15:

[0032] Weigh 12.00g triblock copolymer P123 (polyethylene glycol-polypropylene glycol-polyethylene glycol, (PEG)x -(PPG) y -(PEG) z , M n ≈5800, Sigma-Aldrich), which was dissolved in a mixed solution of 51 ml of commercially available concentrated hydrochloric acid with an HCl content of 36.0-38.0% and 366 ml of deionized water. Add 28.5ml tetraethyl orthosilicate dropwise to the above homogeneous solution, and then stir at 35°C for 20h. Seal the flask containing the above mixed solution and place it in an oven at 80°C for 24 hours to age to obtain a liquid-solid mixture. Finally, the above-mentioned liquid-solid mixture was suction-filtered to separate the solid, and the solid was repeatedly washed with deionized water until neutral, and then dried in an oven at 40°C for 48 hours to obtain a solid mesoporous silica powder containing a template. The above solid powder was placed in a muffle furnace, calcined at 500° C. for 6 hou...

Embodiment 2

[0048] (1) Preparation of carrier SBA-15:

[0049] Each step is with embodiment 1.

[0050] (2) Preparation of catalyst Ni / SBA15-P123 (1 / 500):

[0051] In addition to adding the amount of P123 is 0.0099g (n P123 / n Ni =1 / 500), other with embodiment 1. The resulting catalyst was labeled Ni / SBA15-P123 (1 / 500). The loading amount (mass percentage) of Ni is 4.76wt%.

[0052] (3) Analysis and characterization of the catalyst

[0053] Cryogenic N 2 The structural characteristics of the fresh catalyst were characterized by adsorption-desorption and small-angle X-ray diffraction (XRD), and the results are listed in figure 1 (b) and figure 2 (b). The results show that the freshly prepared Ni / SBA15-P123(1 / 500) catalyst maintains the two-dimensional hexagonal ordered mesoporous structure of SBA-15. In addition, the catalyst was also characterized by wide-angle XRD, and the results are listed in image 3 (b), no diffraction peak attributed to the NiO crystal phase was detecte...

Embodiment 3

[0057] (1) Preparation of carrier SBA-15:

[0058] Each step is with embodiment 1.

[0059] (2) Preparation of catalyst Ni / SBA15-P123 (1 / 50):

[0060] In addition to adding the amount of P123 is 0.0988g (n P123 / n Ni =1 / 50), other with embodiment 1. The resulting catalyst was labeled Ni / SBA15-P123 (1 / 50). The loading amount (mass percentage) of Ni is 4.76wt%.

[0061] (3) Analysis and characterization of the catalyst

[0062] Cryogenic N 2 The texture properties of fresh catalysts were characterized by adsorption-desorption and small-angle X-ray diffraction (XRD), and the results are listed in figure 1 (c) and figure 2 (c). The results showed that the freshly prepared Ni / SBA15-P123(1 / 50) catalyst maintained the mesoporous structure of SBA-15. The characterization results of wide-angle XRD are listed in image 3 (c), the results show that no diffraction peaks attributed to the NiO crystal phase are detected, indicating that the Ni component on the calcined Ni / SBA15...

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Abstract

The present invention relates to a preparation method of a highly-dispersed supported Ni catalyst used for producing synthesis gas through carbon dioxide reforming of methane, and belongs to the technical fields of nature gas chemical industry and catalyst manufacturing engineering. The preparation method is characterized by comprising the following steps: adopting a tri-block copolymer P123 (polyethylene glycol-polypropylene glycol-polyethylene glycol, PEG-PPG-PEG) as an auxiliary additive in a Ni catalyst preparation process; using an aqueous solution of Ni(NO3)2-6H2O and P123 as impregnation liquid; using mesoporous silica SBA-15 as a carrier; and carrying out the process of impregnation, drying and calcinations to prepare the supported Ni catalyst Ni / SBA15-P123(1 / X). The addition amount of P123 in the preparation process of the supported Ni catalyst is that the molar ratio 1 / X of P123 to Ni being 1 / 750-1 / 3, preferably 1 / 500-1 / 50. The synthesis gas is prepared after a reaction under a normal pressure by using the supported Ni / SBA15-P123 (1 / X) as a catalyst and using methane and carbon dioxide as raw material gas. The Ni / SBA15-P123 (1 / X) catalyst prepared by using the process method of the present invention has high activity and excellent stability in the reaction of reforming the methane with the carbon dioxide.

Description

technical field [0001] The invention relates to a method for carbon dioxide reforming methane to produce synthesis gas (CO and H 2 The preparation method of the mixed gas) highly dispersed Ni catalyst belongs to the technical field of natural gas chemical industry and the technical field of catalyst manufacturing engineering. Background technique [0002] As an extremely important fossil energy, natural gas has more application prospects than oil and coal. The depletion of petroleum resources, the pollution to the environment caused by the mining of coal resources and the use of them have made the rational development and utilization of clean and cheap resources the focus of research by scientists from all over the world; as a clean and cheap resource, natural gas has a large reserve and Its abundance, especially with the development and utilization of shale gas, will greatly change the current energy structure. The use of fossil energy inevitably produces carbon dioxide, ...

Claims

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Application Information

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IPC IPC(8): B01J31/06C01B3/40
CPCY02P20/52
Inventor 贺德华杨维维刘会敏
Owner TSINGHUA UNIV
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