A Fischer-Tropsch synthesis process suitable for trickle bed reactor
A technology of Fischer-Tropsch synthesis and reactors, which is applied in the petroleum industry and the preparation of liquid hydrocarbon mixtures, etc. It can solve the problems of low effective utilization of reactor space, difficulty in controlling the supercritical state, and poor wetting rate of process catalysts. , achieve the effect of high target product yield, high production capacity, and avoid overheating
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Embodiment 1
[0029] Prepare catalyst by the method described in patent CN1463794: take Fe(NO 3 ) 3 9H 2 O194.07g, Ca(NO 3 ) 2 4H 2 Og and 50% Mn(NO 3 ) 2 85.99 g of the solution was prepared with deionized water to form a mixed solution with a total concentration of 0.3 mol / L, and the mixed solution was heated in a water bath at 50°C; the ammonia solution with a concentration of 0.5mol / L was prepared and heated in a water bath at 50°C; Slowly add the above ammonia solution into the salt solution, stir, and the precipitation process takes about 35 minutes. When the precipitation ends, the pH=8.5, let it stand for 12 hours, and filter with suction. The filter cake is washed with deionized water until pH=7.5, and then filtered with suction. Dry at 110-120°C for 24 hours; grind the dried filter cake finely, impregnate with 16ml of potassium carbonate with a concentration of 0.91mol / L for 3 hours, dry at 75°C; then roast at 500°C for 5 hours, and press at 50MPa to tablet. The atomic rati...
Embodiment 2
[0032] The catalyst is prepared according to the method described in the patent CN101269336: the porous carbon material is used as a template, and the biomass material corn is used as a carbon source, and it is processed in a microwave oven for 3 minutes to obtain popcorn with good expansion. The treated popcorn was placed in a high-temperature tube furnace and carbonized at 900°C for 4 hours in a nitrogen atmosphere. A carbon template with a honeycomb macroporous structure and a uniform microporous structure is obtained. Preparation solution TEOS:EtOH:NH 3 : H2O=1:30:0.15:2, the solution was stirred at room temperature for 6h, and then impregnated into the pores of porous carbon in three steps (porous carbon / porous carbon+solution=30(wt)%). Immerse each step for 24 hours and dry at 100°C for 24 hours. Finally, it was calcined at 600° C. under an air atmosphere for 6 hours to remove the carbon template to obtain a hierarchically porous silica carrier. Weigh 9.3gCo(NO 3 ) ...
Embodiment 3
[0035] Prepare catalyst 30%Co / SiO by the method described in patent CN101269329 2 , weighed 7.4 grams of cobalt nitrate hexahydrate, dissolved in 20 mL of deionized water to obtain a uniform solution, and used commercial silica gel as a carrier (specific surface area 176m 2 / g, average pore diameter 11.32nm), impregnated by ordinary impregnation method, left at room temperature for 24h, dried in a vacuum oven at 60°C for 24h, after the dried solid was fully ground, baked in air at 500°C for 10h, and roasted The solid powder was slowly heated to 300°C for 10 hours for reduction treatment in a hydrogen atmosphere, and then cooled naturally. After cooling down to room temperature, it was switched to CO passivation gas for passivation for 10 hours, and it was pressed into tablets for use.
[0036] Take 300ml of the catalyst of 20-40 mesh and put it in a trickle bed reactor, the inner diameter of the reactor is 35mm, the height of the reactor is 500mm, and the effective bed height ...
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