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A nickel-based catalyst for methane-carbon dioxide reforming to reduce gas and its preparation method

A carbon dioxide and catalyst technology, applied in the field of nickel-based catalysts and their preparation, can solve the problems of lack of reforming catalyst parameters and reports, and achieve the effects of reducing production costs and operating risks, reducing reaction energy consumption, and good catalytic effects

Inactive Publication Date: 2020-05-26
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reforming catalyst used in this patent is still in the development stage, and there is no report on any parameters of the reforming catalyst in this patent

Method used

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  • A nickel-based catalyst for methane-carbon dioxide reforming to reduce gas and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this embodiment, a nickel-based catalyst used for methane-carbon dioxide reforming to produce reducing gas mainly includes active components, auxiliary agents and carriers, wherein:

[0027] The mixture of X-type molecular sieve and diatomaceous earth is used as raw material, and short fibers with a mass fraction of 3% are added as a pore-enlarging agent. After ball milling and forging, a honeycomb catalyst carrier can be obtained. The active components are nickel and rare earth metal lanthanum. As auxiliary agent: the mass fraction of nickel oxide in the catalyst is 10%, the mass fraction of lanthanum oxide is 3%, and the rest is carrier.

[0028] A kind of nickel-based catalyst used in the reforming of methane-carbon dioxide to produce reducing gas in this example is prepared through the following main steps:

[0029] (1) Carrier obtained by high-temperature calcination: X-type molecular sieve and diatomite (the mass ratio of X-type molecular sieve and diatomite is...

Embodiment 2

[0034] In this embodiment, a nickel-based catalyst used for methane-carbon dioxide reforming to produce reducing gas mainly includes active components, auxiliary agents and carriers, wherein:

[0035] The mixture of X-type molecular sieve and montmorillonite is used as raw material and pore-enlarging short fibers with a mass fraction of 5% are ball-milled and forged to obtain a honeycomb-type catalyst carrier. The active component is nickel, and the rare earth metal lanthanum is used as an auxiliary agent: The mass fraction of nickel oxide is 15%, the mass fraction of additives is 5%, and the rest is carrier. A kind of nickel-based catalyst used in the reforming of methane-carbon dioxide to produce reducing gas in this example is prepared through the following main steps:

[0036] (1) Carrier obtained by high-temperature calcination: X-type molecular sieve and montmorillonite (the mass ratio of X-type molecular sieve and montmorillonite is 1:1.5) and pore-enlarging short fiber...

Embodiment 3

[0043] In this embodiment, a nickel-based catalyst used for methane-carbon dioxide reforming to produce reducing gas mainly includes active components, auxiliary agents and carriers, wherein:

[0044] The mixture of Y-type molecular sieve and kaolin is used as the raw material, and the pore-enlarging agent lignin with a mass fraction of 3% can be forged by ball milling to obtain a honeycomb-type catalyst carrier. The active component is nickel, and the rare earth metal cerium is used as an auxiliary agent: Among them The mass fraction of nickel oxide is 20%, the mass fraction of auxiliary agent cerium oxide is 5%, and the rest is carrier. A kind of nickel-based catalyst used in the reforming of methane-carbon dioxide to produce reducing gas in this example is prepared through the following main steps:

[0045] (1) Carrier obtained by high-temperature calcination: the raw material Y-type molecular sieve and kaolin (the mass ratio of Y-type molecular sieve and kaolin is 1:1.5) a...

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Abstract

The invention belongs to the field of chemical engineering, and particularly relates to a nickel-based catalyst for preparing reducing gas by reforming methane-carbon dioxide and a preparation method of the nickel-based catalyst. The catalyst takes a molecular sieve modified with clay and a pore-enlarging agent as a carrier and takes nickel oxide as an active component and further comprises auxiliaries. With reference to the total weight of the catalyst, the catalyst comprises 10 to 30 weight percent of nickel oxide, 3 to 20 weight percent of one or several of rare earth metals such as La, Nd and Ce, 3 to 5 weight percent of the pore-enlarging agent and the balance of the modified molecular sieve. The catalyst has the characteristics of high carbon deposition resistance, high temperature stability, high intensity and the like, and is suitable for carbon dioxide reforming preparation of reducing gas from methane-enriched gas such as natural gas, coke-oven gas and coal bed gas.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a nickel-based catalyst used for methane-carbon dioxide reforming to produce reducing gas and a preparation method thereof. Background technique [0002] Direct Reduced Iron (DRI-Direct Reduced Iron) is a low-carbon porous substance formed by fine iron powder or iron oxide reduced in a furnace at low temperature. Its chemical composition is stable and its impurity content is low. It is one of the substitutes for scrap steel. Reduced iron is mainly used as a raw material for electric furnace steelmaking, and also as a coolant for converter steelmaking. It can also be used for powder metallurgy after secondary reduction. According to statistics, in 2011, the output of direct reduced iron in the world reached 73.3 million tons, setting a record high. At present, direct reduced iron has been listed as one of the main directions for the development of my country's iron and steel indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/14B01J29/84C01B3/40
CPCB01J29/143B01J29/146B01J29/84B01J2229/14C01B3/40C01B2203/0238C01B2203/1023C01B2203/1058C01B2203/1241Y02P20/52
Inventor 徐华龙李泽军
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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