Catalyst for isobutane dehydrogenation to isobutene
A catalyst, isobutane technology, applied in the direction of catalyst, molecular sieve catalyst, carbon compound catalyst, etc., can solve the problem of low catalyst conversion rate
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Embodiment 1
[0036] 1. Catalyst preparation
[0037] Dissolve chromium nitrate equivalent to 5 grams of Cr2O3, gallium nitrate equivalent to 1.0 grams of Ga2O3, and magnesium nitrate equivalent to 2.5 grams of MgO in 100 ml of deionized water, mix with 91.5 grams of SBA-15 carrier, and stand at room temperature for 6 hours, then dried at 110°C for 30 hours, and finally roasted in a muffle furnace at 620°C for 5 hours to obtain the required catalyst. For the convenience of comparison, the composition of the catalyst is listed in Table 1.
[0038] 2. Catalyst evaluation
[0039] The catalyst prepared by the above-mentioned method carries out activity evaluation in the fixed-bed reactor, and the process is as follows:
[0040] The reactor is a stainless steel tube with an internal diameter of 8 mm and a length of 400 mm. The molar ratio of carbon dioxide and isobutane is 4.5, the reaction temperature is 595° C., the mass space velocity of isobutane is 1.2 hours −1 , and the reaction pressur...
Embodiment 2
[0057] 1. Catalyst preparation
[0058] Dissolve chromium nitrate equivalent to 5 grams of Cr2O3, gallium nitrate equivalent to 1.0 grams of Ga2O3, and calcium nitrate equivalent to 2.5 grams of CaO in 100 ml of deionized water, mix with 91.5 grams of SBA-15 carrier, and stand at room temperature for 6 hour, then dried at 110°C for 30 hours, and finally roasted in a muffle furnace at 620°C for 5 hours to obtain the required catalyst. For the convenience of comparison, the composition of the catalyst is listed in Table 1.
[0059] 2. Catalyst evaluation
[0060] The catalyst prepared by the above-mentioned method carries out activity evaluation in the fixed-bed reactor, and the process is as follows:
[0061] The reactor is a stainless steel tube with an internal diameter of 8 mm and a length of 400 mm. The molar ratio of carbon dioxide and isobutane is 4.5, the reaction temperature is 595° C., the mass space velocity of isobutane is 1.2 hours −1 , and the reaction pressure i...
Embodiment 3
[0064] 1. Catalyst preparation
[0065] Dissolve chromium nitrate equivalent to 5 g of Cr2O3, gallium nitrate equivalent to 1.0 g of Ga2O3, magnesium nitrate equivalent to 1.0 g of MgO, and calcium nitrate equivalent to 1.5 g of CaO in 100 ml of deionized water and mixed with 91.5 g of SBA-15 Carriers were mixed and allowed to stand at room temperature for 6 hours, then dried at 110°C for 30 hours, and finally calcined in a muffle furnace at 620°C for 5 hours to obtain the desired catalyst. For comparison, the composition of the catalyst is listed in Table 1.
[0066] 2. Catalyst evaluation
[0067] The catalyst prepared by the above-mentioned method carries out activity evaluation in the fixed-bed reactor, and the process is as follows:
[0068] The reactor is a stainless steel tube with an internal diameter of 8 mm and a length of 400 mm. The molar ratio of carbon dioxide and isobutane is 4.5, the reaction temperature is 595° C., the mass space velocity of isobutane is 1.2...
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