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A copper-based catalyst for reverse water gas shift reaction and preparation method thereof

A technology of copper-based catalysts and reverse water gas, which is 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, improved conversion rate, low cost effect

Active Publication Date: 2020-08-18
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A copper-based catalyst for reverse water gas shift reaction and preparation method thereof
  • A copper-based catalyst for reverse water gas shift reaction and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Weigh 0.038g of Cu(NO 3 ) 2 ·3H 2 O, 2.50g Ce(NO 3 ) 3 ·6H 2 O and 0.6g of glycine were placed in a 10ml beaker, and 6.3ml of deionized water was added, and ultrasonically oscillated for 20min until completely dissolved. Then add 1.26ml of silica sol (neutral), and again ultrasonically shake for 20min. The above solution was poured into a 250ml 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 sample was placed in a muffle furnace and set to be calcined at a rate of 2 °C / min at room temperature from 25 °C to 600 °C for 4 h. Afterwards, use 2mol / L NaOH solution at 80°C for 4 hours to remove the silica sol template, and centrifuge and wash several times (water→water→ethanol→water→ethanol) to obtain a solid powder that is placed in a beaker and dried at 100°C Dry in oven for 6h, cool to room temperature to get 1% Cu-CeO 2 .

Embodiment 2

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

Embodiment 3

[0029] In addition to Cu(NO 3 ) 2 The amount is 0.38g, Ce(NO 3 ) 3 ·6H 2 The amount of O is 2.27g, and the rest of the preparation method is exactly the same as 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 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
CPCB01J23/83
Inventor 王路辉刘辉杨继亮
Owner ZHEJIANG OCEAN UNIV
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