Catalyst for aromatization of low-carbon mixed hydrocarbons in Fischer-Tropsch synthesis tail gas and its preparation method and use
A technology of catalysts and mixed hydrocarbons, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve good selectivity, low carbon deposition, and good stability
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Embodiment 1
[0026] Prepare ZSM-5 molecular sieve according to the method described in patent CN102874843A: mix 8g aluminum isopropoxide, 20g tetraethyl orthosilicate, 25g tetrapropylammonium hydroxide (25%wt), and 120g water evenly, then stir and age After 12 hours, dry the aged sol-gel into dry glue, then grind the dry glue into powdery dry glue powder to obtain dry glue seed crystals; mix 30g of aluminum nitrate, 1200g of water glass (27.5wt%) and Prepare a mixed solution with 600g of water, stir evenly, then add all the above-mentioned dry glue seeds to the mixed solution, stir evenly, put the above-mentioned mixed solution with dry glue seeds into the reaction kettle, and statically crystallize at 120°C After 72 hours, the crystallized product was obtained; the crystallized product was taken out, washed with water, dried, and roasted at 600°C for 2 hours to obtain a nano-sized ZSM-5 molecular sieve with a relative crystallinity of 90.7%, a single crystal grain size of 1.5 μm, and stati...
Embodiment 2
[0030] Prepare ZSM-5 molecular sieve according to the method described in patent CN102874843A: 8g of aluminum isopropoxide, 22g of tetraethyl orthosilicate, 27g of tetrapropylammonium hydroxide (25%wt), and 125g of water are evenly mixed, then stirred and aged After 4 hours, dry the aged sol-gel into dry glue, then grind the dry glue into powdery dry glue powder to obtain dry glue seed crystals; mix 30g of aluminum nitrate, 1100g of water glass (27.5wt%) and Make a mixed solution with 570g of water, stir evenly, then add all the above-mentioned dry glue seeds to the mixed solution, stir evenly, put the above-mentioned mixed solution with dry glue seeds into the reaction kettle, and statically crystallize at 130°C After 60 hours, the crystallized product was obtained; the crystallized product was taken out, washed with water, dried, and roasted at 580°C for 4 hours to obtain a nano-sized ZSM-5 molecular sieve with a relative crystallinity of 92.3%, a single crystal grain size of...
Embodiment 3
[0034] Prepare ZSM-5 molecular sieve according to the method described in patent CN102874843A: mix 8g aluminum isopropoxide, 24g tetraethyl orthosilicate, 30g tetrapropylammonium hydroxide (25%wt), and 135g water evenly, then stir and age After 8h, dry the aged sol-gel into dry glue, then grind the dry glue into powdery dry glue powder to obtain dry glue seed; 28g aluminum nitrate, 1050g water glass (27.5wt%) and Make a mixed solution with 450g of water, stir evenly, then add all the above-mentioned dry glue seeds to the mixed solution, stir evenly, put the above-mentioned mixed solution with dry glue seeds into the reaction kettle, and statically crystallize at 150°C After 48 hours, the crystallized product was obtained; the crystallized product was taken out, washed with water, dried, and roasted at 570°C for 6 hours to obtain a nano-sized ZSM-5 molecular sieve with a relative crystallinity of 95.5% and a single crystal grain size of 1.2 μm. The adsorption is 12.2%, the pore...
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