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Monatomic catalyst and application thereof in carbon dioxide hydrogenation reaction

A carbon dioxide and catalyst technology, which is applied to a single-atom catalyst and its application field in carbon dioxide hydrogenation, and achieves the effect of a simple preparation method

Active Publication Date: 2020-08-14
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no application of single-atom catalysts in carbon dioxide hydrogenation to methanol. In the reaction of carbon dioxide hydrogenation, there are three main hydrogenation products, CO, methanol and methane. The key to research is to obtain a certain product with high selectivity. where the

Method used

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  • Monatomic catalyst and application thereof in carbon dioxide hydrogenation reaction
  • Monatomic catalyst and application thereof in carbon dioxide hydrogenation reaction
  • Monatomic catalyst and application thereof in carbon dioxide hydrogenation reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Add 1 g of palladium acetylacetonate and 200 g of cerium acetylacetonate into a ball mill, and ball mill at 500 rpm for 10 h. The resulting solid was then calcined at 450°C for 3 h in an air atmosphere to obtain a Pd / CeO with a Pd content of 0.4%. 2 catalyst.

[0032] figure 1 In the transmission electron microscope image of the catalyst prepared for this example, no Pd particles were found in this image, only lattice fringes of the carrier, indicating that Pd was in a highly dispersed state on the catalyst carrier. In addition, the dispersion of Pd was measured by the CO pulse adsorption method, and the dispersion of Pd was as high as 98.1%. It is considered that Pd on the catalyst is in a monodisperse state, and the catalyst is a single-atom catalyst.

[0033] (2) Activity test: with reference to the aforementioned "catalyst performance evaluation", the prepared catalyst is evaluated for catalytic activity in a fixed-bed reactor, and the reaction conditions are:...

Embodiment 2

[0035](1) Add 1 g of palladium acetylacetonate and 400 g of cerium acetylacetonate into a ball mill, and ball mill at 500 rpm for 10 h. The resulting solid was then calcined at 450°C for 3 h in an air atmosphere to obtain a Pd / CeO with a Pd content of 0.2%. 2 For the catalyst, the dispersion degree of Pd was measured by the CO pulse adsorption method, and the measured dispersion degree of Pd was 99.3%.

[0036] (2) The reaction conditions of the activity test are the same as in Example 1, and the results of the activity test are shown in Table 1.

Embodiment 3

[0038] (1) Add 1 g of palladium acetylacetonate and 600 g of cerium acetylacetonate into a ball mill, and ball mill at 500 rpm for 10 h. The resulting solid was then calcined at 450°C for 3 h in an air atmosphere to obtain a Pd / CeO with a Pd content of 0.1%. 2 For the catalyst, the dispersion degree of Pd was measured by the CO pulse adsorption method, and the measured dispersion degree of Pd was 99.5%.

[0039] (2) The reaction conditions of the activity test are the same as in Example 1, and the results of the activity test are shown in Table 1.

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Abstract

The invention discloses a monatomic catalyst and application thereof in a carbon dioxide hydrogenation reaction, and belongs to the technical field of carbon dioxide conversion. Cerium dioxide, zinc oxide, zirconium dioxide, chromium sesquioxide and the like are used as carriers, and monoatomic Pd, In, Cu and Au are used as active components; the weight of the catalyst carriers accounts for 95-99.9% of the total weight of the catalyst, and the weight of the active components accounts for 0.01-5% of the total weight of the catalyst. The preparation method of the catalyst is simple, methanol orcarbon monoxide can be selectively generated by adjusting reaction conditions, the selectivity of the methanol or carbon monoxide is very high and can reach 90% or above, and the catalyst has wide industrial application prospects.

Description

technical field [0001] The invention relates to a single-atom catalyst and its application in carbon dioxide hydrogenation reaction, belonging to the technical field of carbon dioxide conversion. Background technique [0002] CO 2 It is an important greenhouse gas, which will cause a series of severe environmental problems, such as climate anomalies, global warming, ocean acidification, glacier melting, ecological destruction, etc. Its emission reduction and catalytic conversion have attracted the attention of the whole world. The use of renewable energy such as solar energy to produce hydrogen through photocatalysis and photoelectric catalysis, and use it for hydrogenation of carbon dioxide to synthesize CO, methanol and other chemical raw materials is the use of carbon dioxide. one of the effective ways. CO is the most common carbon-based raw material, and its hydrogenation can directly synthesize basic chemicals and fuels such as olefins, aromatics, gasoline, diesel, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/60B01J23/68B01J23/83B01J23/10B01J37/08C07C29/154C07C29/157C07C31/04C01B32/40
CPCB01J23/63B01J23/60B01J23/685B01J23/83B01J23/10B01J37/0036B01J37/086C07C29/154C07C29/157C01B32/40B01J35/394B01J35/23B01J35/40C07C31/04Y02P20/52
Inventor 刘小浩姜枫胥月兵刘冰
Owner JIANGNAN UNIV
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