Copper-based catalyst for reverse water-gas shift reaction and preparation method therefor

A technology of copper-based catalysts and conversion reactions, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve problems such as copper-based catalyst instability and achieve overcoming Poor thermal stability, reduced high temperature sintering, and continuously adjustable pore size

Active Publication Date: 2017-12-22
ZHEJIANG OCEAN UNIV
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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a copper-based catalyst for reverse water gas shift reaction and its preparation method, which solves the problem of copper-based catalyst instability at high temperature and obtains a copper-based catalyst suitable for high temperature reverse water gas shift reaction. Copper-based catalyst with high activity, high stability and high selectivity

Method used

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  • Copper-based catalyst for reverse water-gas shift reaction and preparation method therefor
  • Copper-based catalyst for reverse water-gas shift reaction and preparation method therefor

Examples

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Effect test

Embodiment 1

[0025] Weigh 0.038g of Cu(NO 3 ) 2 ·3H 2 O, 2.50 g of Ce (NO 3 ) 3 ·6H 2 O and 0.6g of glycine were placed in a 10ml beaker, 6.3ml of deionized water was added, and sonicated for 20min until completely dissolved. Then 1.26 ml of silica sol (neutral) was added, and ultrasonically oscillated again for 20 min. The above solution was poured into a 250 ml beaker and heated to 170°C on a hot plate until the reaction of glycine and nitrate was complete. After cooling to room temperature, the samples were placed in a muffle furnace set at a rate of 2 °C / min and calcined at room temperature from 25 °C to 600 °C for 4 h. After that, the silica sol template was removed by constant-temperature magnetic stirring at 80 °C for 4 h with 2 mol / L NaOH solution, and centrifuged and washed (water → water → ethanol → water → ethanol) for several times to obtain a solid powder, which was placed in a beaker and dried at 100 °C. Dry in the box for 6h, then cool to room temperature to obtain 1%...

Embodiment 2

[0027] Except for Cu(NO 3 ) 2 The amount of 0.19g, Ce (NO 3 ) 3 ·6H 2 The amount of O was 2.40 g, and the rest of the preparation method was exactly the same as that in Example 1 to obtain 5% Cu-CeO 2 .

Embodiment 3

[0029] Except for Cu(NO 3 ) 2 The amount of 0.38g, Ce (NO 3 ) 3 ·6H 2 The amount of O was 2.27 g, and the rest of the preparation method was exactly the same as that in Example 1 to obtain 10% Cu-CeO 2 .

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Abstract

The invention relates to the field of catalysts and discloses a copper-based catalyst for a reverse water-gas shift reaction and a preparation method therefor. The catalyst is prepared from the following raw materials: 0.3wt% to 5.4wt% of Cu(NO3)2.3H2O, 14wt% to 24wt% of Ce(NO3)3.6H2O, 4wt% to 7wt% of glycine, 53wt% to 71wt% of deionized water and 7wt% to 12wt% of neutral silica sol, wherein the content of Cu in the obtained Cu-CeO2 catalyst is 1wt% to 20wt%. According to the copper-based catalyst for the reverse water-gas shift reaction and the preparation method therefor, the mesoporous Cu-CeO2 catalyst is prepared by using a silica sol method and has good thermal stability due to a mesoporous structure, and the disadvantage of the traditional copper-based catalysts that the thermal stability is poor is overcome. In a reaction process, the production of a byproduct, i.e., methane is not discovered, the catalyst selectivity is high, and the copper-based catalyst for reverse water-gas shift has high activity and good stability and has an extremely high industrial application value.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a copper-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 a large amount of emissions is becoming more and more serious, CO 2 The transformation and application research of carbon dioxide is increasingly active, in which carbon dioxide reverse water gas shift reaction (CO 2 +H 2 =CO+H 2 O) is considered to be one of the most promising reactions, so it is of great significance to develop a catalyst for the reverse water gas shift reaction with high activity, high stability and high selectivity 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B32/40
CPCB01J23/83
Inventor 王路辉刘辉杨继亮
Owner ZHEJIANG OCEAN UNIV
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