Nitrogen-doped activated carbon supported noble metal catalyst and application thereof
A precious metal catalyst, activated carbon technology, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, organic chemistry, etc., can solve the problems of high preparation cost, waste gas generation, low yield, etc. The effect of low catalyst dosage, lower use cost and high metal utilization rate
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[0047] Example 1
[0048] Activated carbon physical parameters and treatment: ash content is 6.0wt%, specific surface area is 500m 2 / g, 150-1000 mesh activated carbon, made of coconut shell. Each gram of the activated carbon is soaked in 5ml, 0.1mol / L hydrochloric acid, boiled for 1h, then treated with 3.5ml concentrated nitric acid (10%), stirred at 35°C for 1h, and dried for later use.
[0049] Dissolve 0.08g of dicyandiamide in 40mL of water at 75℃, add 0.56g of activated carbon to the nitrogen source solution under stirring (at this time the mass ratio of nitrogen to activated carbon is 0.1:1), ultrasonic treatment for 10min, during which the temperature is 75 ℃, keep the temperature and continue mechanical stirring for 1h. The obtained slurry was transferred to a hydrothermal kettle, filled with air and sealed under normal pressure, and heat-treated at 80°C for 2 hours. After cooling to room temperature, the nitrogen-containing activated carbon slurry was washed with a volum...
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[0051] Example 2
[0052] The physical parameters and treatment of the carrier activated carbon: ash content is 1.0wt%, specific surface area is 1500m 2 / g, 200-800 mesh activated carbon, made of coconut shell. Each gram of the activated carbon is soaked in 10ml, 1.0mol / L hydrochloric acid, boiled for 1h, then treated with 15ml concentrated nitric acid (10%), stirred at 35°C for 1h, and dried for later use.
[0053] Dissolve 0.34g of dicyandiamide in 40mL of water at 95°C. Under stirring, add 0.238g of activated carbon to the nitrogen source solution. At this time, the mass ratio of nitrogen to activated carbon is 1:1. Ultrasonic treatment is performed for 50 minutes. The temperature is 75℃, keep the temperature and continue mechanical stirring for 10h. The obtained slurry was transferred to a hydrothermal kettle, filled with air and sealed under normal pressure, and heat-treated at 120°C for 10 hours. After cooling to room temperature, the nitrogen-containing activated carbon slu...
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[0055] Example 3
[0056] The physical parameters and treatment of the carrier activated carbon: the ash content is 3.0wt%, and the specific surface area is 1500m 2 / g, 200-800 mesh activated carbon, made of coconut shell. Each gram of the activated carbon is soaked in 10ml, 3.0mol / L hydrochloric acid, boiled for 4h, and then treated with 15ml of hydrogen peroxide (15wt%), stirred at 35°C for 15h, and dried for later use.
[0057] Dissolve 0.67 g of dicyandiamide in 40 mL of water at 95°C, add 0.45 g of activated carbon to the nitrogen source solution, at this time, the mass ratio of nitrogen to activated carbon is 1:1, ultrasonic treatment for 20 minutes, the temperature is 75°C, then Raise the temperature to 95°C, keep the temperature and continue mechanical stirring for 24h. The obtained slurry was transferred to a hydrothermal kettle, filled with nitrogen and sealed under normal pressure, heat-treated at 180°C for 12 hours, cooled to room temperature, and washed with a volume ...
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