Catalyst composition and application thereof in direct preparation of low-carbon olefin from synthesis gas
A composition and catalyst technology, applied in the direction of producing hydrocarbons from carbon oxides, hydrocarbons, hydrocarbons, etc., can solve the problems of low isobutene selectivity and low CO conversion rate, and achieve high CO conversion rate, high low carbon Effects of olefin selectivity, excellent butene selectivity
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Embodiment 1
[0032] ZnAl 1.3 Oxides are prepared as follows:
[0033] Weigh 1.0 mol of zinc nitrate and 1.3 mol of aluminum nitrate, dissolve them in 2000 mL of distilled water, then dissolve 6.0 mol of NaOH in 2000 mL of water, co-precipitate the two aqueous solutions, age at 70°C for 3 hours, and filter at 100 Dry overnight at ℃, calcined at 400℃ for 12h to get ZnAl 1.3 oxide.
[0034] AlPO 4 -14 molecular sieves are prepared as follows:
[0035] Pseudoboehmite, phosphoric acid, and isopropylamine are used as aluminum source, phosphorus source, and template agent respectively, and the molar ratio of Al 2 o 3 :P 2 o 5 :Isopropylamine:H 2 O=1:1:1:50, add to the reaction kettle and age for 2 hours, stir and crystallize at 200°C for 72h, 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 -14 molecular sieves. See XRD figure 1 .
[0036] 0.75 g of prepared ZnAl 1.3 ox...
Embodiment 2
[0038] InAl 0.8 Oxides are prepared as follows:
[0039] Weigh 1.0 mol of indium nitrate and 0.8 mol of aluminum nitrate, dissolve them in 2000 mL of distilled water, then dissolve 5.5 mol of NaOH in 2000 mL of water, co-precipitate the two aqueous solutions, age at 70°C for 3 hours, and filter at 100 °C dried overnight, then fired at 400 °C for 12 hours to obtain InAl 0.8 oxide.
[0040] AlPO 4 -14 molecular sieves were prepared according to [Example 1].
[0041] GaPO 4 -14 molecular sieves are prepared as follows:
[0042] With gallium nitrate, phosphoric acid, and isopropylamine (Isopropylamine) as the gallium source, phosphorus source, and template agent, the molar ratio of Ga(NO 3 ) 3 :P 2 o 5 :Isopropylamine:H 2 O=2:1:1:50, put into the reaction kettle and age for 2 hours, stir and crystallize at 200°C for 72h, 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 t...
Embodiment 3
[0045] Zn 0.75 Cr oxides are prepared as follows:
[0046] Weigh 0.75 mol of zinc nitrate and 1 mol of chromium nitrate, dissolve them in 1500 mL of distilled water, then dissolve 4.8 mol of NaOH in 1500 mL of water, co-precipitate the two aqueous solutions, age at 70°C for 3 hours, and filter at 100 It was dried overnight at ℃ and calcined at 400℃ for 12h. Get Zn 0.75 Cr oxide.
[0047] ZnO is prepared as follows:
[0048] Weigh 1mol of zinc nitrate, dissolve it in 1000mL of distilled water, then dissolve 2mol of NaOH in 1000mL of water, co-precipitate the two aqueous solutions, age at 70°C for 3h, filter and dry at 100°C overnight, at 400°C Baking at ℃ for 12h. Obtain ZnO oxide.
[0049] Al-GaPO 4 -14 molecular sieves are prepared as follows:
[0050] Pseudoboehmite, gallium nitrate, phosphoric acid, and isopropylamine are used as aluminum source, gallium source, phosphorus source, and template respectively, and the molar ratio of Al 2 o 3 : Ga(NO 3 ) 3 :P 2 o ...
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