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A nickel-based catalyst for reverse water gas shift reaction and its preparation method

A technology of nickel-based catalysts and transformation reactions, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the problems of poor selectivity of nickel-based catalysts and achieve guaranteed Effects of catalytic activity, improvement of dispersion, and reduction of loss of specific surface area

Active Publication Date: 2020-06-16
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a nickel-based catalyst for reverse water gas shift reaction and its preparation method, which solves the problem of poor CO selectivity of nickel-based catalysts and obtains a catalyst suitable for reverse water gas shift reaction. Ni-based catalyst with high activity and high selectivity

Method used

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  • A nickel-based catalyst for reverse water gas shift reaction and its preparation method
  • A nickel-based catalyst for reverse water gas shift reaction and its preparation method
  • A nickel-based catalyst for reverse water gas shift reaction and its preparation method

Examples

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Effect test

Embodiment 1

[0026] Weigh 0.0496g of Ni(NO 3 ) 3 ·6H 2 O, 2.6314 La(NO 3 ) 3 ·6H 2 O, 0.6g glycine, measure 6.3ml of H 2 O, sonicate for 20 minutes until completely dissolved. Add 1.0ml of silica sol (neutral), and ultrasonically vibrate for 20min. Pour the above solution into a 250ml beaker, and heat it to 230°C on a hot plate until the glycine and nitrate react completely. After cooling to room temperature, in the muffle furnace, the heating rate was set at 2°C / min, and the temperature was increased from room temperature to 600°C for calcination for 4h. The obtained calcined product was dissolved in 2 mol / L NaOH solution, and stirred at 80° C. for 4 h under constant magnetic force. Multiple centrifugal washings (water→water→ethanol→water→ethanol) yielded solid powder. Transfer to a small beaker, dry in a blast oven at 100°C for 6 hours, and cool to room temperature to obtain 1% Ni-La 2 o 3 .

Embodiment 2

[0028] In addition to Ni(NO 3 ) 3 ·6H 2 The amount of O is 0.1g, La(NO 3 ) 3 ·6H 2 The amount of O is 2.60g, and the rest of the preparation method is exactly the same as in Example 1 to obtain 2%Ni-La 2 o 3 .

Embodiment 3

[0030] In addition to Ni(NO 3 ) 3 ·6H 2 The amount of O is 0.248g, La(NO 3 ) 3 ·6H 2 The amount of O is 2.53g, and the rest of the preparation method is exactly the same as in Example 1 to obtain 5% Ni-La 2 o 3 .

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Abstract

The invention relates to the field of catalysts and discloses a nickel-based catalyst for a reversed water gas shift reaction and a preparation method of the nickel-based catalyst. The catalyst is prepared from the following raw materials in a formula: 0.2 to 4.5 weight percent of Ni(NO3)3.6H2O, 23 to 25 weight percent of La(NO3)3. 6H2O, 5 to 6 weight percent of glycine, 50 to 60 weight percent ofdeionized water and 9 to 15 weight percent of neutral silica sol, wherein the content of Ni in the catalyst is 0.5 to 10 weight percent. According to the preparation method disclosed by the invention, by adding lanthanum into the catalyst, the dispersity of the nickel is greatly improved, the occurrence of methanation side reaction is reduced and the disadvantage of poor selectivity of a traditional nickel-based catalyst is overcome. According to the preparation method disclosed by the invention, a mesoporous nickel-lanthanum catalyst is prepared by using a silica sol method; with a mesoporous structure, the nickel-based catalyst has good catalytic activity and thermal stability. Compared with a catalyst containing precious metal, the nickel-based catalyst has the advantage of lower costand is suitable for industrial application.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a nickel-based catalyst for reverse water gas shift reaction and a preparation method thereof. Background technique [0002] In recent years, with the CO 2 The greenhouse effect caused by massive emissions is becoming more and more serious, CO 2 The conversion and application research of carbon dioxide is becoming more and more active, in which the reverse water gas shift reaction of carbon dioxide (CO 2 +H 2 =CO+H 2 O) is considered to be one of the most promising reactions, so the development of reverse water gas shift reaction catalysts with high activity, high stability and high selectivity is of great significance for the utilization of carbon dioxide and the production of energy. [0003] The reverse water gas shift reaction is a reversible reaction. In general, the catalysts suitable for the water gas shift reaction are also suitable for the reverse water gas shift reaction. S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C01B32/40
Inventor 王路辉刘辉汤国丽
Owner ZHEJIANG OCEAN UNIV
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