Catalyst for producing sulfur trioxide from sulfur dioxide
A sulfur trioxide and sulfur dioxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve problems such as sulfur trioxide difficulties
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Embodiment 1
[0057] 1. Catalyst preparation
[0058] Put 1L silica spherical carrier (diameter is 6.5mm, BET comparison surface is 187m 2 / g, the pore volume is 0.78cm 3 / g) and 850ml ammonium metavanadate-zirconium nitrate mixed aqueous solution (wherein the mixed aqueous solution contains ammonium metavanadate with V 2 o 5 Calculated as 20g, zirconium nitrate as ZrO 2 6 g) were mixed, left to stand for 1 hour, dried at 70° C. for 6 hours, and calcined at 500° C. in an air atmosphere for 5 hours to obtain a catalyst. The composition of the catalyst is shown in Table 1.
[0059] 2. Catalyst evaluation
[0060] The reactor used for the catalyst evaluation reaction is a 100ml fixed-bed reactor, the catalyst loading capacity is 100ml, the reaction temperature is 340°C, and the total volume space velocity of air and sulfur dioxide is 5hr -1 , the molar ratio of air (calculated as oxygen) to sulfur dioxide is 10. For ease of comparison, the reaction results are listed in Table 1.
Embodiment 2
[0062] 1. Catalyst preparation
[0063] Put 1L silica spherical carrier (diameter is 6.5mm, BET comparison surface is 187m 2 / g, the pore volume is 0.78cm 3 / g) and 850ml ammonium metavanadate-bismuth nitrate mixed aqueous solution (wherein the mixed aqueous solution contains ammonium metavanadate with V 2 o 5 Calculated as 20g, bismuth nitrate as Bi 2 o 3 6 g) were mixed, left to stand for 1 hour, dried at 70° C. for 6 hours, and calcined at 500° C. in an air atmosphere for 5 hours to obtain a catalyst. The composition of the catalyst is shown in Table 1.
[0064] 2. Catalyst evaluation
[0065] The reactor used for the catalyst evaluation reaction is a 100ml fixed-bed reactor, the catalyst loading capacity is 100ml, the reaction temperature is 340°C, and the total volume space velocity of air and sulfur dioxide is 5hr -1 , the molar ratio of air (calculated as oxygen) to sulfur dioxide is 10. For ease of comparison, the reaction results are listed in Table 1.
Embodiment 3
[0067] 1. Catalyst preparation
[0068] Put 1L silica spherical carrier (diameter is 6.5mm, BET comparison surface is 187m 2 / g, the pore volume is 0.78cm 3 / g) and 850ml ammonium metavanadate-ammonium molybdate mixed aqueous solution (wherein the mixed aqueous solution contains ammonium metavanadate with V 2 o 5 Calculated as 20g, ammonium molybdate as MoO 3 6 g) were mixed, left to stand for 1 hour, dried at 70° C. for 6 hours, and calcined at 500° C. in an air atmosphere for 5 hours to obtain a catalyst. The composition of the catalyst is shown in Table 1.
[0069] 2. Catalyst evaluation
[0070] The reactor used for the catalyst evaluation reaction is a 100ml fixed-bed reactor, the catalyst loading capacity is 100ml, the reaction temperature is 340°C, and the total volume space velocity of air and sulfur dioxide is 5hr -1 , the molar ratio of air (calculated as oxygen) to sulfur dioxide is 10. For ease of comparison, the reaction results are listed in Table 1.
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