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Nitrogen-doped activated carbon catalyst and application thereof

A technology of activated carbon and nitrogen doping, applied in the direction of physical/chemical process catalysts, organic chemistry, dehydrohalogenation preparation, etc., can solve environmental pollution and other problems, and achieve good catalytic performance, high conversion rate and high selectivity

Active Publication Date: 2015-04-01
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a nitrogen-doped activated carbon catalyst and its application to solve the technical problem of serious environmental pollution in the production process of chemical products in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 1.5g of acrylamide and add 40ml of deionized water to dissolve in a beaker, weigh 30g of coal-based activated carbon and add it to the acrylamide solution, soak it at 25°C for 2 hours, dry the impregnated activated carbon at 40°C for 24 hours, dry The final activated carbon was calcined at 600° C. under a nitrogen atmosphere for 6 hours to obtain a nitrogen-doped activated carbon catalyst. Using the obtained nitrogen-doped activated carbon catalyst to catalyze the synergistic reaction of tetrachloroethane and acetylene to form trichlorethylene and vinyl chloride, the reaction temperature is 230 ° C, the space velocity is 30 / h, the conversion rate of tetrachloroethane is 81.5%, and the conversion rate of acetylene is 75.5%. , The selectivity of trichlorethylene is 98.3%, and the selectivity of vinyl chloride is 98.9%.

Embodiment 2

[0022] Weigh 5.0g of pyrrole and add 30ml of deionized water to dissolve in a beaker, weigh 25g of coconut shell-based activated carbon and add it to the pyrrole solution, soak at 25°C for 12 hours, dry the impregnated activated carbon at 120°C for 12 hours, after drying The activated carbon was calcined at 500°C for 7 hours under a nitrogen atmosphere to obtain a nitrogen-doped activated carbon catalyst. Using the obtained nitrogen-doped activated carbon catalyst to catalyze the synergistic reaction of tetrachloroethane and acetylene to form trichlorethylene and vinyl chloride, the reaction temperature is 260 ° C, the space velocity is 50 / h, the conversion rate of tetrachloroethane is 98.6%, and the conversion rate of acetylene is 88.6%. , The selectivity of trichlorethylene is 97.9%, and the selectivity of vinyl chloride is 98.1%.

Embodiment 3

[0024] Weigh 4.5g of pyridine and add 40ml of deionized water to dissolve in a beaker, weigh 30g of coal-based activated carbon and add it to the pyridine solution, soak it at 0°C for 24 hours, dry the impregnated activated carbon at 140°C for 6 hours, and the dried Activated carbon was calcined at 800°C for 4 hours under a nitrogen atmosphere to obtain a nitrogen-doped activated carbon catalyst. Using the obtained nitrogen-doped activated carbon catalyst to catalyze the synergistic reaction of tetrachloroethane and acetylene to form trichlorethylene and vinyl chloride, the reaction temperature is 240 ° C, the space velocity is 100 / h, the conversion rate of tetrachloroethane is 89.6%, and the conversion rate of acetylene is 82.3%. , The selectivity of trichlorethylene is 98.7%, and the selectivity of vinyl chloride is 98.4%.

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Abstract

The invention discloses a nitrogen-doped activated carbon catalyst and application thereof. The preparation method of the nitrogen-doped activated carbon catalyst comprises the following steps: adding a nitrogen-containing compound into water to dissolve to obtain a nitride solution, wherein the nitrogen-containing compound is one or more of ammonia water, ammonia gas, pyridine, pyrrole, imidazole, acrylamide, polyacrylamide and polyvinylpyrrolidone; adding activated carbon into the nitride solution to soak; completely drying the soaked activated carbon, and calcining in nitrogen atmosphere, thereby preparing the nitrogen-doped activated carbon catalyst. The nitrogen-doped activated carbon catalyst disclosed by the invention has very good catalysis property in reaction of catalyzing tetrachloroethane and acetylene to generate trichloro ethylene and chloroethylene and catalyzing tetrachloroethane gas phase cracking to generate trichloro ethylene.

Description

technical field [0001] The invention relates to an activated carbon catalyst, in particular to a nitrogen-doped activated carbon catalyst and its application. Background technique [0002] As an important chemical product, trichlorethylene (TCE) is mainly used as a raw material for the production of refrigerant HCF-134a, cleaning agent and chemical intermediates. The demand for chemical intermediates is increasing year by year. As of 2012, the foreign production capacity was 480,000 tons / a, and the actual output was less than 200,000 tons / a; the total domestic production capacity of trichlorethylene was 400,000 tons / a, and nearly 20 manufacturers developed low-cost, low-pollution high-efficiency catalysts Has a huge market prospect. [0003] The synthetic method of trichlorethylene (TCE) includes acetylene method and ethylene method, what adopt the earliest is to first generate tetrachloroethane with acetylene as raw material, tetrachloroethane and calcium hydroxide saponif...

Claims

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Application Information

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IPC IPC(8): B01J27/24C07C21/06C07C21/10C07C17/25
Inventor 姜标沈兆兵
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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