A method for controlling the atomic ratio of metals in supported Cu-PD/AC alloy catalysts
An alloy catalyst and metal atom technology, which is applied in the field of Cu-Pd/AC alloy catalyst, can solve the problems of affecting the stability and life of the catalyst, affecting the activity of the catalyst catalyst, and being unable to control palladium and other metal elements well, etc. Excellent selectivity, good catalytic activity, and low production cost
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Embodiment 1
[0030] Take 0.95ml 0.1mol / L H 2 PdCl 4 The solution was diluted and loaded on 1g of activated carbon. After standing and drying, it was roasted at 600°C for 2 hours under nitrogen atmosphere, and then switched to ammonia gas at 600°C for 1.5 hours. After cooling down, it was taken out and soaked in an appropriate amount of ammonia solution, and then filtered. Then take 0.95ml 0.5mol / L Cu(NO 3 ) 2 ·3H 2 The O solution was diluted and mixed with the above catalyst, filtered and dried, then loaded into a fixed bed reactor, fed with a mixture of nitrogen and ammonia for 2 hours at 400°C, and then fed with hydrogen for reduction at 250°C for 2 hours, and then passed into R- 12 gas at a reaction temperature of 300°C and a space velocity of 720h -1 The reaction is carried out under the conditions, and the molar ratio of raw material to hydrogen is 1:1.5. The conversion rate, selectivity and catalyst efficiency of the reaction are shown in Table 1.
[0031] attached figure 1 Th...
Embodiment 2
[0033] Take 0.47ml 0.1mol / L H 2 PdCl 4 The solution was diluted and loaded on 1g of activated carbon. After standing and drying, it was roasted at 500°C for 4 hours under a nitrogen atmosphere, then switched to ammonia gas and roasted at 500°C for 3 hours. The temperature was lowered, taken out, immersed in an appropriate amount of ammonia solution, and filtered. Then take 0.95ml 0.5mol / L Cu(NO 3 ) 2 ·3H 2 The O solution was diluted and mixed with the above catalyst, filtered and dried, then loaded into a fixed bed reactor, fed with a mixture of nitrogen and ammonia for 2 hours at 400°C, and then fed with hydrogen for reduction at 250°C for 2 hours, and then passed into R- 12 Gas reacts at a reaction temperature of 300°C and a space velocity of 720h-1, and the molar ratio of raw materials to hydrogen is 1:1.5. The conversion rate, selectivity and catalyst efficiency of the reaction are shown in Table 1.
Embodiment 3
[0035] Take 0.47ml 0.1mol / L H 2 PdCl 4 The solution was diluted and loaded on 1g of activated carbon. After standing and drying, it was roasted at 700°C for 1.5h under a nitrogen atmosphere, and then switched to ammonia gas at 700°C for 1h. The temperature was lowered, taken out, soaked in an appropriate amount of ammonia solution, and filtered. Then take 1.26ml 0.5mol / L Cu(NO 3 ) 2 ·3H 2 The O solution was diluted and mixed with the above catalyst, filtered and dried, then loaded into a fixed bed reactor, fed with a mixture of nitrogen and ammonia for 2 hours at 400°C, and then fed with hydrogen for reduction at 250°C for 2 hours, and then passed into R- 12 Gas reacts at a reaction temperature of 300°C and a space velocity of 720h-1, and the molar ratio of raw materials to hydrogen is 1:1.5. The conversion rate, selectivity and catalyst efficiency of the reaction are shown in Table 1.
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