One-step method for producing olefins from syngas
A technology for synthesis gas and olefin production, which can be used in chemical instruments and methods, hydrocarbon production from carbon oxides, physical/chemical process catalysts, etc., and can solve the problems of low selectivity, long conversion path, and high energy and material consumption.
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Embodiment 1
[0045] In 2 o 3 +Cr 2 o 3 Catalyst is prepared as follows:
[0046] Weigh 1 mol of indium nitrate, dissolve it in 1000 mL of distilled water, then dissolve 3.2 mol of NaOH in 1000 mL of water, co-precipitate the two aqueous solutions, age at 70 °C for 3 h, filter and dry overnight at 100 °C, Calcined at 400°C for 12h to obtain In 2 o 3 catalyst.
[0047] Weigh 1mol of chromium nitrate, dissolve it in 1000mL of distilled water, then dissolve 3.2mol of NaOH in 1000mL of water, co-precipitate the two aqueous solutions, age at 70°C for 3h, filter and dry overnight at 100°C, Calcined at 400°C for 12 hours to obtain Cr 2 o 3 catalyst.
[0048] AlPO 4 -5 catalyst is prepared as follows:
[0049] Pseudoboehmite, phosphoric acid, and tri-n-propylamine (TPA) were used as aluminum source, phosphorus source, and template agent respectively, and the molar ratio of Al 2 o 3 :P 2 o 5 :TPA:Ethanol:H 2 O=1:1.2:2.66:80:1000, add to the reactor and age for 2 hours, stir and cryst...
Embodiment 2
[0052] Cr 2 o 3 The catalyst was prepared according to [Example 1].
[0053] AlPO 4 -17 catalyst is prepared as follows:
[0054] Pseudoboehmite, phosphoric acid, and cyclohexylamine were used as aluminum source, phosphorus source, and template respectively, and the molar ratio of Al 2 o 3 :P 2 o 5 :CHA:HF:H 2 O=1:1:1:1:40, add to the reactor and age for 2 hours, stir and crystallize at 200°C for 72 hours, wash the obtained solid with deionized water until neutral, separate the solid, dry it, and put it in a muffle furnace Calcined at 550°C for 6 hours to obtain AlPO 4 -17 molecular sieves.
[0055] 0.77 g of prepared Cr 2 o 3 Catalyst and 0.7 g of prepared AlPO 4 -17 mixed, packed into a quartz reaction tube with an inner 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 ...
Embodiment 3
[0057] ZnGa 0.3 Catalyst is prepared as follows:
[0058] Weigh 1 mol of zinc nitrate and 0.3 mol of gallium nitrate, dissolve them in 1000 mL of distilled water, then dissolve 3 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 and bake at 400°C for 12 hours to obtain ZnGa 0.3 catalyst.
[0059] AlPO 4 -18 catalyst is prepared as follows:
[0060] Pseudoboehmite, phosphoric acid, and N,N-diisopropylethylamine are used as aluminum source, phosphorus source, and template agent respectively, and the molar ratio of Al 2 o 3 :P 2 o 5 :TPA:H 2 O=1:1:1:50, add to the reactor and age for 2 hours, stir and crystallize at 200°C for 48 hours, wash the obtained solid with deionized water until neutral, separate the solid, dry it, and put it in a muffle furnace for 550 ℃ roasting for 6 hours to get AlPO 4 -18 molecular sieve, its XRD spectrum is shown in figure 1 .
[0061] 0.77 g of p...
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