Hexaaluminate-doped oxide catalyst and preparing method and application thereof

A technology of hexaaluminate and catalyst, applied in the field of synthesis gas preparation, can solve problems such as low catalytic efficiency, and achieve the effects of simplifying preparation process, reducing cost, and improving catalytic performance and stability

Inactive Publication Date: 2018-07-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a doped hexaaluminate oxide catalyst, its preparation method and it

Method used

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  • Hexaaluminate-doped oxide catalyst and preparing method and application thereof
  • Hexaaluminate-doped oxide catalyst and preparing method and application thereof
  • Hexaaluminate-doped oxide catalyst and preparing method and application thereof

Examples

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Example Embodiment

[0030] In another typical embodiment of this application, a method for preparing a catalyst is provided, and the general formula of the catalyst is Re 0.8 Zr x M A Ni 1-A Al 11 O 19-δ , Where Re is La or Sr, M is Co, Fe, Mn or Cu, 0≤x≤0.2, 0≤A≤1, and the preparation method includes: formulating Re element, respectively according to the molar ratio of each element in the general formula, Salt solutions of Zr element, M element, Ni element and Al element; mix each salt solution with the isopropanol solution of polyethylene glycol to form a mixed system; the clarified mixed system is treated in a water bath to a gel state To obtain a gel; and sequentially drying and calcining the gel to obtain a catalyst.

[0031] The above-mentioned polyethylene glycol isopropanol solution is used as a dispersant, the salt solution of each element and the polyethylene glycol isopropanol solution are mixed, and then heated in a conventional water bath to obtain a gel; The catalyst of the present app...

Example Embodiment

[0043] Example 1

[0044] Hexaluminate catalyst with Zr partially substituted La 0.8 Zr x Co 0.5 Ni 0.5 Al 11 O 19-δ , Prepared by high temperature roasting nitrate method. Put La(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O, Co(NO 3 ) 2 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Al (NO 3 ) 3 ·9H 2 O is dissolved in distilled water at a molar ratio of 0.8:0:0.5:0.5:11 to prepare a mixed solution. Then slowly drop the mixed solution into 50 mL of hot isopropanol solution containing 3 g of polyethylene glycol 20000 to form a mixed system. Put the clarified mixed system in a water bath at 80°C and steam it to a gel to obtain a gel. Put the gel in an oven at 150°C for drying, and grind it into a powder. The powder is roasted in a low-temperature muffle furnace at 400°C for 2 hours, and then placed in a high-temperature muffle furnace at 1250°C for 5 hours, then reduced to room temperature, and compressed , Granulate, take granules with a particle size of 20-60 mesh as the catalyst in Example 1.

Example Embodiment

[0045] Example 2

[0046] The difference between this embodiment and the specific embodiment 1 is: La(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O, Co(NO 3 ) 2 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Al (NO 3 ) 3 ·9H 2 O is in a molar ratio of 0.8:0.02:0.5:0.5:11.

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Abstract

The invention provides a hexaaluminate-doped oxide catalyst and a preparing method and application thereof. The general formula of the hexaaluminate-doped oxide catalyst is Re0.8ZrxMANi1-AAl11O9-delta, wherein Re is La or Sr, M is Co, Fe, Mn or Cu, x is larger than or equal to 0 and smaller than or equal to 0.2, and A is larger than or equal to 0 and smaller than or equal to 1. Since M, Ni, Zr andrare earth metal La and the like are introduced into a hexaaluminate lattice, by controlling contents of all elements, full play is given to advantages of transition metal, rare earth elements and hexaaluminate, the catalysis performance and stability of the hexaaluminate oxide catalyst in a reforming reaction of methane and carbon dioxide are improved, temperature of the reforming reaction can be lowered, and then energy consumption and equipment requirements are lowered; meanwhile, the catalyst can be prepared simply by adopting a solution method and a high temperature calcination method which are common in the prior art, thus the preparing technology is simplified, the cost is lowered, and the catalyst is applicable to industrial application and popularization.

Description

technical field [0001] The invention relates to the field of synthesis gas preparation, in particular to a doped hexaaluminate oxide catalyst, its preparation method and its application. Background technique [0002] People began to study the reforming of methane and carbon dioxide to produce syngas in the 1920s. In recent years, people have paid great attention to the phenomenon of global warming caused by greenhouse gases. Both methane and carbon dioxide are greenhouse gases. Greenhouse gases are gaining more and more attention. Catalytic reforming of methane and carbon dioxide to synthesis gas is one of the most promising technologies for the utilization and conversion of carbon-containing greenhouse gases. The synthesis gas produced by the reforming of methane and carbon dioxide has higher purity than the synthesis gas produced by the steam reforming of methane, and the ratio of hydrogen and carbon monoxide in the synthesis gas is lower, 1:1, which is very suitable as a...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/40C10J1/20
CPCB01J23/002B01J23/83C01B3/40C01B2203/0238C01B2203/1058C10J1/20Y02P20/52
Inventor 李菁赵胤王洋刘春艳陈吉门李正彭建林刘春江
Owner PETROCHINA CO LTD
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