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Method for preparing synthetic gas through dry reforming of methane

A technology for dry reforming of methane and synthesis gas, which is applied in hydrogen/syngas production, chemical instruments and methods, and bulk chemical production, etc., can solve the problem of poor anti-coking performance of catalysts, low reaction space velocity, and short service life of catalysts and other problems, to achieve the effect of improving catalytic stability, uniform temperature distribution, and high catalytic activity

Active Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the short service life of the catalyst due to the low reaction space velocity or the poor anti-coking performance of the catalyst in the methane dry reforming reaction of the prior art, and to provide a catalyst with a relatively high reaction space velocity and New long-lived methane dry reforming method to synthesis gas

Method used

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  • Method for preparing synthetic gas through dry reforming of methane
  • Method for preparing synthetic gas through dry reforming of methane
  • Method for preparing synthetic gas through dry reforming of methane

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Embodiment approach

[0023] According to a preferred embodiment of the present invention, the carrier is La and / or Mg modified Al 2 o 3 carrier, and relative to 100 parts by weight of Al modified with additives 2 o 3 As for the carrier, the content of additives La and / or Mg is 3-13 parts by weight, preferably 6-12 parts by weight, based on oxides.

[0024] According to a preferred embodiment of the present invention, relative to 100 parts by weight of the catalyst, the content of the active metal component is 4.5-6.5 parts by weight in terms of metal elements.

[0025] In the present invention, the impregnation method in the carrier modification method is not particularly limited, for example, it can be an equal-volume impregnation method commonly used in the art, or a supersaturated impregnation method, or a combination of the above methods. The temperature and time of the immersion treatment are not particularly limited, as long as the desired auxiliary ingredients can be loaded on the carrie...

Embodiment 1

[0043] This example is used to illustrate the method for producing synthesis gas by dry reforming of methane provided by the present invention.

[0044] (1) Preparation of catalyst carrier

[0045] Weigh 5.53g of Mg(NO 3 ) 2 ·6H 2 O was dissolved in 14g of deionized water to prepare carrier impregnation solution; after the dissolution was completed, it was impregnated in 10g of Al 2 o 3 On the carrier, the immersion temperature is 25°C, and it is allowed to stand for 2 hours. The strips are then extruded on an extruder. The obtained wet strip was dried at 120° C. for 8 hours, and then put into a muffle furnace for sintering at 800° C. for 3 hours. The resulting support is denoted as 8Mg-Al 2 o 3 .

[0046] (2) Preparation of catalyst

[0047] Weigh 1.06g of Ni(NO 3 ) 2 ·6H 2 O and 0.211g of P123 were dissolved in 5.2g of deionized water and stirred to dissolve, and the impregnating solution was impregnated in 4g of the above carrier 8Mg-Al 2 o 3 After standing f...

Embodiment 2

[0051] This example is used to illustrate the method for producing synthesis gas by dry reforming of methane provided by the present invention.

[0052] (1) Preparation of catalyst carrier

[0053] Weigh 1.7g of La(NO 3 ) 3 ·6H 2 O was dissolved in 14g of deionized water to prepare carrier impregnation solution; after the dissolution was completed, it was impregnated in 10g of Al 2 o 3 On the carrier, the immersion temperature is 35°C, and it is allowed to stand still for 1 hour. The strips are then extruded on an extruder. The obtained wet strip was dried at 90° C. for 10 hours, and then put into a muffle furnace for sintering at 1000° C. for 2 hours. The resulting support is denoted as 6La-Al 2 o 3 .

[0054] (2) Preparation of catalyst

[0055] Weigh 0.84g of Ni(NO 3 ) 2 ·6H 2 O and 0.166g of P123 were put into 5.2g of deionized water and stirred and dissolved; this catalyst impregnation solution was impregnated in 4g of the above-mentioned carrier 6La-Al 2 o ...

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Abstract

The invention relates to the field of preparation of synthetic gas through dry reforming of methane, and discloses a method for preparing synthetic gas through dry reforming of methane. The loading amount of an active metal component Ni in a catalyst in a catalyst bed of a dry reforming reaction of methane is controlled, and a Al2O3 carrier and / or a Al2O3 carrier modified with an auxiliary agent is adopted. Even in relatively high reaction velocity, temperature dispersion of the catalyst bed is basically uniform, and an area where carbon is easily thermodynamically accumulated can be avoided, so that the catalytic stability of a catalyst is greatly improved and the service life of the catalyst can be prolonged.

Description

technical field [0001] The invention relates to the research field of producing synthesis gas by dry reforming of methane, in particular to a method for producing synthesis gas by dry reforming of methane. Background technique [0002] Methane dry reforming is CH 4 and CO 2 Under the action of a catalyst, the reaction produces CO and H 2 (synthesis gas) reaction process, the reaction formula is as follows: [0003] CH 4 +CO 2 →2CO+2H 2 , ΔH 298K =247.3kJ / mol (1) [0004] CO 2 +H 2 →CO+H 2 O,ΔH 298K =40.96kJ / mol (2) [0005] Among them, the reaction formula (1) is the main reaction, and the reaction formula (2) is the side reaction, that is, the reverse water gas shift reaction, and it is because of the existence of the reverse water gas shift reaction that the H in the product 2 / CO ratio is less than 1. [0006] The methane dry reforming reaction converts two of the cheapest carbon-containing compounds in nature, CH 4 and CO 2 It is transformed into chemical...

Claims

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Application Information

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IPC IPC(8): C01B3/40
CPCY02P20/52C01B3/40C01B2203/0238C01B2203/08C01B2203/1058C01B2203/1241C01B2203/169
Inventor 张荣俊夏国富李明丰侯朝鹏晋超聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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