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Fixed bed Fischer-Tropsch method for preparing liquid hydrocarbon

A technology of fixed bed and liquid hydrocarbons, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry. It can solve the problems of reducing device production capacity, unfavorable high cost of reactors, and economic disadvantages, so as to prevent accumulation, increase yield, and reduce The effect of hotspots

Active Publication Date: 2012-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods reduce the production capacity of the plant and are economically unfavorable
Other methods can also be used, such as reducing the diameter of the reaction tube to improve heat transfer efficiency, but this method will be limited in industrial production, and the high cost of the reactor is also unfavorable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 500g γ-Al 2 O 3 Carrier (product of Changling Catalyst Factory, particle size 16-26 mesh), the carrier is placed in a muffle furnace and calcined at 600°C for 3 hours.

[0037] Weigh the above γ-Al 2 O 3 Carrier 30g, take 5.5g of cobalt nitrate and dissolve it into 8.1ml solution, spray the solution on the carrier with agitation using spray method, then bake in an oven at 120℃ for 4 hours, and then in a muffle furnace Calcined at 500°C for 4 hours and repeated the operation twice to obtain catalyst A.

[0038] The catalyst B was prepared by the same method as the above catalyst A, except that the repeated operations of spraying, drying and roasting were three times. The purpose was to change the content of cobalt in the general formula CoXO to obtain catalyst B with different activities. . It can be seen from the CO conversion results of Comparative Examples 1 and 2 given later that the activity level of Catalyst B is 3.78% higher than that of Catalyst A.

[0039] Load...

Embodiment 2

[0048] Weigh 500g γ-Al 2 O 3 Carrier (product of Changling Catalyst Factory, particle size 16-26 mesh), the carrier is placed in a muffle furnace and calcined at 600°C for 3 hours.

[0049] Weigh the above γ-Al 2 O 3 30 g carrier, take 8.3 g cobalt nitrate and dissolve it into 13.5 ml solution, spray the solution on the carrier with agitation, and then bake it in an oven at 120°C for 4 hours, and then in a muffle furnace Calcined at 500°C for 4 hours and repeated the operation twice to obtain catalyst C.

[0050] The catalyst D was prepared by the same method as the above catalyst C, except that the number of repetitions of spraying, drying, and calcination was three times. The purpose was to change the content of cobalt in the general formula CoXO to obtain catalyst D with different activities. From the CO conversion results of Comparative Examples 3 and 4 given later, it can be seen that the activity level of catalyst D is higher than that of catalyst C by 3.21%.

[0051] Load the...

Embodiment 3

[0060] Weigh 500g γ-Al 2 O 3 Carrier (product of Changling Catalyst Factory, particle size 16-26 mesh), the carrier is placed in a muffle furnace and calcined at 600°C for 3 hours.

[0061] Weigh the above γ-Al 2 O 3 30 grams of carrier, take 8.3 grams of cobalt nitrate and 0.05 grams of RuCl 3 ·3H 2 O was dissolved into 13.5 ml of solution, and the solution was sprayed onto the carrier under agitation by spraying, and then baked in an oven at 120°C for 4 hours, followed by baking in a muffle furnace at 500°C for 4 hours, and repeat the operation Three times, catalyst E was obtained.

[0062] Weigh the above γ-Al 2 O 3 30 grams of carrier, take 8.3 grams of cobalt nitrate and 0.04 grams of Pd(NH 3 ) 2 Cl 2 Dissolve into 13.5 ml of solution, spray the solution on the above carrier with agitation, and then bake in an oven at 120°C for 4 hours, followed by baking in a muffle furnace at 500°C for 4 hours, and repeat the operation three times , To obtain the catalyst F, the purpose is t...

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Abstract

The invention discloses a fixed bed Fischer-Tropsch method for preparing a liquid hydrocarbon. The fixed bed Fischer-Tropsch method for preparing a liquid hydrocarbon is characterized in that mixed gas containing hydrogen and carbon monoxide undergoes a contact reaction with a catalyst bed layer in a fixed bed tubular reactor under Fischer-Tropsch synthesis reaction conditions; the interior of the fixed bed tubular reactor is divided into 2 to 3 reaction zones along an axial direction; the reaction zones are filled with catalysts with different activity levels; and the activity levels of the catalysts are increased progressively from a gas inlet end of the fixed bed tubular reactor to a gas outlet end of the fixed bed tubular reactor. The fixed bed Fischer-Tropsch method for preparing a liquid hydrocarbon can remove reaction heat effectively, avoid phenomenons of reaction heat accumulation and overtemperature, realize stable operation of a reaction system, guarantee smooth development of reaction processes, make a whole catalyst bed layer perform effectively reaction effects, and improve a C5+ liquid hydrocarbon yield.

Description

Technical field [0001] The invention relates to a Fischer-Tropsch synthesis method, in particular to a fixed-bed Fischer-Tropsch synthesis method. Background technique [0002] Using natural gas, asphalt, coal, biomass and other carbon and hydrogen-containing resources as raw materials to produce synthesis gas, and then using the synthesis gas as the raw material to produce liquid hydrocarbons through Fischer-Tropsch synthesis, it is a good alternative to petroleum technology. The Fischer-Tropsch synthesis reactor can have many forms, such as fixed bed, gas-solid fluidized bed and slurry bed. Among them, the gas-solid fluidized bed is complicated to operate and easy to deposit carbon, and it is rarely used now. Slurry bed has the advantages of good heat transfer effect and easy control of reaction temperature. It is the mainstream of Fischer-Tropsch synthesis reactor development. However, the solid-liquid separation of the slurry-bed reactor is difficult and is only suitable fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G2/00
Inventor 李猛胡志海聂红徐润吴昊田鹏程夏国富
Owner CHINA PETROLEUM & CHEM CORP
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