Combination catalyst for the production of light olefins
A technology combining catalysts and carbon olefins, applied in the direction of carbon compound catalysts, catalysts, molecular sieve catalysts, etc., can solve the problems of high energy consumption and material consumption, low catalyst activity, long conversion path, etc.
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Embodiment 1
[0035] ZnCr 0.25 -Na0.06 Catalyst is prepared as follows:
[0036] Weigh 1 mol of zinc nitrate and 0.25 mol of chromium nitrate, dissolve them in 1000 mL of distilled water, then dissolve 4 mol of NaOH in 1000 mL of water, co-precipitate the two aqueous solutions, age at 70°C for 3 hours, and filter at 100°C Dry overnight at 400°C for 12 hours. After the calcination is completed, the catalyst intermediate supports 0.03mol of Na 2 CO 3 , dried overnight at 80°C, and fired at 400°C for 1 hour to obtain ZnCr 0.25 -Na 0.06 catalyst.
[0037] The SAPO-34 catalyst is prepared according to the following steps: phosphoric acid, pseudoboehmite, ethyl orthosilicate, and morpholine are respectively used as phosphorus source, aluminum source, silicon source, template agent, and the molar ratio Al 2 o 3 :P 2 o 5 : SiO 2 :MOR:H 2 O=1:1:0.6:3:100, add to the reactor and age for 2 hours, stir and crystallize at 200°C for 24 hours, wash the obtained solid with deionized water until ...
Embodiment 2
[0040] ZnCr 3 -Cu 0.08 Li 0.8 Catalyst is prepared as follows:
[0041] Weigh 0.1mol of zinc nitrate, 0.3mol of chromium nitrate, 0.008mol of copper nitrate, dissolve in 1000mL of distilled water, then dissolve 2mol of KOH in 1000mL of water, co-precipitate the two aqueous solutions, and age at 70°C 3h, dried at 100°C overnight after filtration, and calcined at 400°C for 12h. After the calcination is completed, the catalyst intermediate supports 0.04 mol of Li 2 CO 3 , dried overnight at 80°C, and fired at 400°C for 1 hour to obtain ZnCr 3 -Cu 0.08 Li 0.8 catalyst.
[0042] The SAPO-34 catalyst was prepared according to [Example 1].
[0043] 1 gram of prepared ZnCr 0.25 -Na 0.06 Catalyst and 0.5 gram of prepared SAPO-34 were mixed, and packed into a quartz reaction tube with an internal diameter of 6 mm, the (n 氢气 :n 一氧化碳 =50:50) into the reaction tube, into the catalytic bed reaction, the reaction temperature is 400 ℃, the reaction system pressure is 4MPa, the ga...
Embodiment 3-1
[0045] ZnCr 1.5 -Ga 0.4 Catalyst is prepared as follows:
[0046] Weigh 0.1mol of zinc nitrate, 0.15mol of chromium nitrate, 0.04mol of gallium nitrate, dissolve in 1000mL of distilled water, then dissolve 2mol of KOH in 1000mL of water, co-precipitate the two aqueous solutions, and age at 70°C 3h, filtered and dried overnight at 100°C, and roasted at 400°C for 12h to obtain ZnCr 1.5 -Ga 0.4 catalyst.
[0047] The SAPO-34 catalyst was prepared according to [Example 1].
[0048] 0.75 g of prepared ZnCr 1.5 -Ga 0.4 Catalyst and 0.75 gram of prepared SAPO-34 were mixed, and packed into a quartz reaction tube with an internal diameter of 6 mm, the (n 氢气 :n 一氧化碳 =50:50) into the reaction tube, into the catalytic bed reaction, the reaction temperature is 400 ℃, the reaction system pressure is 4MPa, the gas volume space velocity is 4,000h -1 The reaction of syngas to light olefins is carried out under the conditions. The activity evaluation results are shown in Table 1.
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