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Nano-carbon loaded atomic-scale dispersion copper-based catalyst, and preparation method and application thereof

A copper-based catalyst, nano-carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as environmental pollution, high price, loss, etc. To achieve the effect of simple preparation method, low cost and good stability

Pending Publication Date: 2019-05-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lindlar catalyst uses noble metal palladium as the active metal component, which is expensive
At the same time, Lindlar contains sulfur and lead components, which will be lost into the environment with the product, causing pollution to the environment

Method used

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  • Nano-carbon loaded atomic-scale dispersion copper-based catalyst, and preparation method and application thereof
  • Nano-carbon loaded atomic-scale dispersion copper-based catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put 200 mg of nano-diamond / graphene carrier in a 100-mL round-bottomed flask filled with 30 mL of water, and after ultrasonic dispersion, adjust the pH value to 11 with 0.25 mol / L sodium carbonate solution to obtain a nano-carbon carrier dispersion. Calculate the amount of copper nitrate solution based on the load of 0.25wt%, then add 0.016mol / L copper nitrate solution to the nano-carbon carrier solution, keep stirring at 100°C in an oil bath for 1 hour, then cool down to room temperature, and filter with suction and washing to obtain a nickel-based nano-diamond / graphene composite catalyst precursor. Then 200 mg of nano-carbon-supported copper-based catalyst precursor was placed in a quartz tube, treated at 200 ° C for 1 hour with a flow rate of 50 mL / min of hydrogen and helium (hydrogen gas fraction was 10%), and then heated at 50 mL / min of helium The atmosphere is lowered to room temperature, and the nano-carbon-supported atomic-level dispersed copper-based catalyst i...

Embodiment 2

[0036] The catalysts obtained in Example 1 and Comparative Example 1 were added to the fixed-bed reactor. The mixed raw material gas is: 1% acetylene, 10% hydrogen, 20% ethylene, helium as the balance gas, the space velocity is 6000mL / g h, and the percentage is volume percentage, catalyzing the hydrogenation of acetylene to generate ethylene, the catalyst The use temperature is 100°C-200°C; the reaction product is detected by gas chromatography. where Cu n / ND@G ethylene selectivity below 60%, while atomically dispersed Cu 1 / ND@G has an acetylene conversion rate of 95% and an ethylene selectivity of 98% at 200°C. The performance of the catalyst does not decrease significantly when it is continuously used for 60 hours, indicating that the nano-carbon-supported atomically dispersed copper-based catalyst prepared by the method of the present invention can obviously obtain higher acetylene catalytic reaction activity and ethylene selectivity.

[0037] Correct the transmission ...

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Abstract

The invention discloses a nano-carbon loaded atomic-scale dispersion copper-based catalyst, and a preparation method and application thereof, and belongs to the technical field of catalysts applied toacetylene selective hydrogenation reaction. Acetylene is subjected to hydrogenation to generate ethylene in mixed feed gas through the atomic-scale dispersion copper-based catalyst, and the using temperature of the catalyst is 100-200 DEG C; and copper is dispersed on a nano-carbon material in an atomic-scale mode, compared with a traditional palladium-based carbon material and a commercial palladium catalyst, the nano-carbon loaded atomic-scale dispersion copper-based catalyst can effectively catalyze the acetylene to be converted into the ethylene, and acetylene hydrogenation selectivity isobviously improved. The nano-carbon loaded atomic-scale dispersion copper-based catalyst is low in cost, good in stability performance and not prone to inactivation in the reaction process.

Description

technical field [0001] The invention relates to the technical field of acetylene hydrogenation reaction catalysts, in particular to a nano-carbon-supported atomically dispersed copper-based catalyst and a preparation method and application thereof. Background technique [0002] Ethylene (C 2 h 2 ) as a basic chemical raw material for synthetic plastics, fibers, rubber, etc., has very important industrial application value. However, ethylene products obtained from petroleum cracking usually contain a small amount of acetylene, the presence of acetylene reduces the quality of downstream polymer products, and also poisons catalysts for downstream polymerization reactions. Therefore, the selective hydrogenation of a small amount of acetylene in ethylene raw materials to prepare ethylene is of great significance in the production process of fine chemical industry and polymer industry. [0003] The most widely used traditional acetylene selective hydrogenation catalyst in indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C07C5/05C07C11/04
CPCY02P20/52
Inventor 刘洪阳黄飞
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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