Iron-cobalt-potassium-loading zirconium dioxide catalyst, preparation method and applications thereof

A technology of zirconium dioxide and iron cobalt potassium, which is applied in the field of selective reduction of carbon dioxide to ethylene, can solve the problems of low conversion rate and poor activity, achieve good catalytic performance, maintain catalytic performance, excellent ethylene selectivity and The effect of carbon dioxide conversion

Active Publication Date: 2020-03-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the difficulty of commercial application of existing noble metal catalysts, non-noble metal catalysts CO 2 The problem of low conversion rate and poor activity, the present invention provides a high surface oxygen vacancy loaded iron cobalt potassium zirconia catalyst, preparation method and its application in selective catalytic reduction of carbon dioxide to ethylene

Method used

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  • Iron-cobalt-potassium-loading zirconium dioxide catalyst, preparation method and applications thereof
  • Iron-cobalt-potassium-loading zirconium dioxide catalyst, preparation method and applications thereof
  • Iron-cobalt-potassium-loading zirconium dioxide catalyst, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Fe 3.33 co 1.67 K 5 / ZrO 2 The catalyst was prepared by a one-step hydrothermal method, and Fe(NO 3 ) 3 9H 2 O, Co(NO 3 ) 3 ·6H 2 O. KNO 3 and ZrO 2 (The mass ratio is 5:2:5:100) were dissolved in deionized water together, and stirred for 12 hours to obtain a mixed precursor solution. Pour the mixed precursor solution into the reaction kettle, hydrothermally react at 140°C for 12h, centrifuge, and dry at 110°C to obtain Fe 3.33 co 1.67 K 5 / ZrO 2 catalyst.

Embodiment 2

[0031] Preparation of FeCoK with total Fe and Co loadings of 0, 1, 3, 5, 7, 9 wt% 5 / ZrO 2 catalyst. In the same method as in Example 1, different mass ratios of Fe(NO 3 ) 3 9H 2 O and Co(NO 3 ) 3 ·6H 2 O dissolved.

Embodiment 3

[0033]Preparation of FeCoK / ZrO with K loadings of 0, 1, 3, 5, 7, 10 wt% 2 catalyst. In the same way as in Example 1, change KNO 3 the dissolution quality.

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Abstract

The invention discloses an iron-cobalt-potassium-loading zirconium dioxide catalyst and a preparation method thereof, and applications in preparation of ethylene through selective catalytic reductionof carbon dioxide. According to the method, a mixed solution of a Fe salt, a Co salt, a K salt and ZrO2 is subjected to a hydrothermal reaction at a temperature of 120-160 DEG C through a one-step hydrothermal method to obtain the iron-cobalt-potassium-loading zirconium dioxide catalyst. According to the iron-cobalt-potassium-loading zirconium dioxide catalyst of the invention, ZrO2 is used as a carrier so as to provide high surface oxygen vacancy, promote the conversion from CO2 to CO and increase the conversion rate of CO2; and through the synergistic promotion of iron-cobalt-potassium and zirconium dioxide, the catalyst has high catalytic activity, maintains good catalytic performance after continuous reaction is conducted for 250 h, and has high stability.

Description

technical field [0001] The invention belongs to the technical field of thermal catalytic reduction of carbon dioxide to produce ethylene, and relates to a zirconium dioxide catalyst loaded with iron, cobalt and potassium, a preparation method and its application in selective reduction of carbon dioxide to produce ethylene. Background technique [0002] Due to CO 2 The impact of global climate change, carbon dioxide utilization has become a research hotspot. In addition, CO 2 As an important carbon source, it can be converted into hydrocarbons on the catalyst through photocatalysis, electrocatalysis, and thermocatalysis. CO 2 Thermocatalytic hydrogenation to ethylene is an efficient and commercially viable route. Ethylene is one of the chemical products with the largest output in the world, and is the core of the petrochemical industry, accounting for more than 75% of petrochemical products, and occupies an important position in the national economy. At present, catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C07C1/12C07C11/04
CPCB01J23/78C07C1/12C07C2523/78C07C11/04Y02P20/52
Inventor 钟秦顾浩丁杰
Owner NANJING UNIV OF SCI & TECH
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