a hg 0 Oxidation catalyst and its preparation method and application
A technology of catalyst and oxide, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. Problems such as the difficulty of gas application, etc., to achieve the effect of high cost performance, simple composition and low cost
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Embodiment 1
[0048] Embodiment 1 prepares cobalt metal oxide catalyst
[0049] Prepare cobalt metal oxide according to the following steps:
[0050] Will Co(NO 3 ) 2 ·6H 2 O normal temperature (25 ℃) is dissolved in the deionized water preparation cobalt ion concentration and is the cobalt nitrate solution of 2mol / L, (NH 4 ) 2 CO 3 Dissolve in deionized water to prepare 3mol / L ammonium carbonate solution. Under the condition of stirring (the rotation speed is 250 rpm), the ammonium carbonate solution was dropped into the cobalt nitrate solution to carry out the precipitation reaction, and the pH of the precipitation solution was maintained at 10. The precipitate was separated by centrifugation and washed with water until the filtrate was neutral, and dried in an oven at 110° C. for 14 hours to obtain cobalt metal hydroxide. Then put it into a muffle furnace and bake at 500° C. for 4 hours to prepare cobalt metal oxide. as a catalyst for Hg 0 oxidation reaction.
[0051] The catal...
Embodiment 2
[0054] Embodiment 2, preparation anti-NH 3 Interfering Modified Cobalt Metal Oxide Catalysts
[0055] Follow the steps below to prepare anti-NH 3 Interfering Modified Cobalt Metal Oxide Catalysts:
[0056] 1) Co(NO 3 ) 2 ·6H 2 O normal temperature is dissolved in the deionized water preparation cobalt ion concentration and is the cobalt nitrate solution of 2mol / L, (NH 4 ) 2 CO 3 Dissolve in deionized water to prepare 3mol / L ammonium carbonate solution. The ammonium carbonate solution was dropped into the cobalt nitrate solution under stirring condition (rotating speed: 250 rpm) to carry out precipitation reaction, and the pH=10 of the precipitation solution was maintained. The precipitate was separated by centrifugation, washed with water until the filtrate was neutral, and dried at 110°C for 14 hours to obtain cobalt metal hydroxide. Calcined at 500°C for 4 hours to obtain cobalt metal oxide.
[0057] 2) According to Cs / (Cs+Co)=0.01 (ratio of the amount of substance...
Embodiment 3
[0061] Embodiment 3, preparation anti-NH 3 Interfering Modified Cobalt Metal Oxide Catalysts
[0062] Follow the steps below to prepare anti-NH 3 Interfering Modified Cobalt Metal Oxide Catalysts:
[0063] 1) Co(NO 3 ) 2 ·6H 2 O normal temperature is dissolved in the deionized water preparation cobalt ion concentration and is the cobalt nitrate solution of 2mol / L, (NH 4 ) 2 CO 3 Dissolve in deionized water to prepare 3mol / L ammonium carbonate solution. The ammonium carbonate solution was dropped into the cobalt nitrate solution under stirring condition (rotating speed: 250 rpm) to carry out precipitation reaction, and the pH=10 of the precipitation solution was maintained. The precipitate was separated by centrifugation, washed with water until the filtrate was neutral, and dried at 110°C for 14 hours to obtain cobalt metal hydroxide. Calcined at 500°C for 4 hours to obtain cobalt metal oxide.
[0064] 2) According to Cs / (Cs+Co)=0.05 (the ratio of the amount of subst...
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