A kind of carbon monoxide oxidation method
A carbon monoxide and oxidation catalyst technology, applied in the field of oxidation, can solve the problems of poor stability, high reaction temperature, poor water resistance, etc., achieve high activity stability, and reduce the effect of reaction temperature
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preparation example Construction
[0013] The preparation method of the catalyst comprises calcining the nano-diamond at 900-1200 DEG C in an inert gas, impregnating it with a solution containing a platinum compound, drying it in the air and then reducing it.
[0014] In the above method, the calcining temperature of the nano-diamond in an inert gas is preferably 1000-1200°C. The inert gas is preferably nitrogen. The firing time is preferably 2-20 hours, more preferably 4-18 hours.
[0015] After the nano-diamond is baked in an inert gas, it is impregnated with a platinum-containing compound, and the platinum-containing compound is selected from platinum nitrate, chloroplatinic acid, potassium chloroplatinate, dichlorotetraammine platinum or platinum acetylacetonate. The liquid / solid ratio during immersion is preferably 50 to 70 mL / g, and the immersion temperature is preferably 15 to 45°C. The platinum content in the platinum-containing compound solution used for impregnation is preferably 0.05-2.0 mg / mL, mor...
example 1
[0023] Preparation of catalyst of the present invention and performance evaluation of carbon monoxide oxidation
[0024] (1) Preparation of catalyst
[0025] Take nano-diamond ND-30 with a particle size of 30nm, in N 2 Baking at 1100°C for 18 hours. Take 1.0g in N 2 The nano-diamonds after medium roasting were put into 8.6mL of chloroplatinic acid solution with a Pt content of 5.8mg / mL and 55.4mL of deionized water, treated with ultrasonic waves at 25°C for 3h, stirred for another 48h, and dried at 110°C for 24h; Reduction in a sodium formate solution with a concentration of 15mg / mL for 1 hour at 100°C, the molar ratio of sodium formate to Pt used was 15:1, and dried at 60°C for 18 hours to obtain catalyst A with a pore diameter of 11.7nm and a specific surface area of 340m 2 / g, the total pore volume is 0.796cm 3 / g (according to nitrogen absorption-desorption curve, adopt BET equation to obtain specific surface area, adopt BJH equation to obtain pore diameter and total...
example 2
[0030] Catalyst is prepared by the method of example 1, and difference is (1) step with nano-diamond in N 2 The catalyst D was calcined at 1100°C, and the chloroplatinic acid solution used for impregnating platinum was 2.6 mL. The contents of platinum and oxygen in the prepared catalyst D are shown in Table 1.
[0031] Evaluate the oxidation performance of catalyst by example 1 (2) step method, the average value of 30 ℃ of reaction 1 hour gained carbon monoxide conversion rates is shown in Table 1, changes reaction temperature, reacts 1 hour under each reaction temperature, and the results are shown in Table 3.
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