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Catalyst used for increasing selectivity of higher carbon alcohol production via Fischer-Tropsch synthesis, and preparation method and applications thereof

A catalyst and selective technology, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, etc., can solve problems such as lack of high added value, restricted economy, and high proportion of methanol

Active Publication Date: 2014-02-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, the carbon number of mixed alcohols produced by Fischer-Tropsch synthesis is relatively low, generally C 1 ~C 6 , basically can not get high added value C 6 The high-carbon alcohol above, and methanol with low added value has a large proportion, reaching more than 40%, which restricts the economical efficiency of this technology

Method used

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  • Catalyst used for increasing selectivity of higher carbon alcohol production via Fischer-Tropsch synthesis, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The specific surface area and pore size distribution of coconut shell activated carbon were measured on the AS-1 adsorption instrument of QUANTACHROME Company. The sample was first degassed at 573K for 3 hours, and nitrogen adsorption test was carried out at the temperature of liquid nitrogen, N 2 Molecular cross-sectional area is taken as 0.162nm 2 . The BET method was used to calculate the specific surface area of ​​the samples, and the BJH method was used to calculate the pore distribution. The measured specific surface area of ​​coconut shell activated carbon is 1012m 2 / g, the average pore diameter is 3.5nm, and the pore volume is 0.42mL / g.

[0069] Take 1000 grams of coconut shell activated carbon carrier, and use deionized water to boil and wash for three times. The specific method is: take 1000 grams of coconut shell activated carbon, add 5000 grams of deionized water, boil together for 0.5 hours, and then separate the activated carbon from the boiling water....

Embodiment 2

[0072] Catalyst B has a composition of 15Co0.5Al / AC1. Using the coconut shell activated carbon treated in Example 1 as a carrier, the catalyst was prepared according to the following steps. Weigh 10 grams of processed activated carbon and place it in a suction filter bottle. Weigh 0.822 g of Al(NO 3 ) 3 9H 2 O and 8.7 g Co(NO 3 ) 2 ·6H 2 O, they were dissolved in 10 mL deionized water to make a solution, and placed in a separatory funnel. Use a rubber stopper with a hole in the middle to seal the separatory funnel with the conical suction flask. The prepared solution is impregnated on the activated carbon by vacuum impregnation, that is, at room temperature, close the separatory funnel plunger, first treat the activated carbon under vacuum (0.01MPa) for 20 minutes, then open the plunger to remove the solution in the separatory funnel Flow into the activated charcoal in the suction flask so that it soaks in the solution. The prepared sample was dried in the shade at ro...

Embodiment 3

[0074] The composition of catalyst C is 15Co1Al / AC1. Using the coconut shell activated carbon treated in Example 1 as a carrier, the catalyst was prepared according to the following steps. Take by weighing 10 grams of activated carbon, take by weighing 1.65 grams of Al(NO 3 ) 3 9H 2 O and 5.53 g CoC 2 o 4 2H 2 O was prepared into a solution in 13 mL of deionized water, and the prepared solution was impregnated on activated carbon by the above-mentioned conventional impregnation method. Dry in the shade at room temperature, the drying time is based on the time when the catalyst reaches a dry state, then dry in an air atmosphere at 343K for 24 hours, then dry in an argon atmosphere at 383K for 4 hours; finally dry in an argon atmosphere at 623K Calcined for 4 hours to obtain a catalyst C oxide precursor with a Co weight content of 15% and an Al weight content of 1%. The BET determination of catalyst C oxide precursor is the same as above, and its specific surface area is ...

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Abstract

The invention provides a catalyst used for increasing selectivity of higher carbon alcohol production via Fischer-Tropsch synthesis, and a preparation method and applications thereof, and specifically relates to a catalyst used for increasing selectivity of high carbon primary alcohols (more than 6 carbon atoms) in mixed primary alcohols prepared via hydrogenation of CO, and a preparation method and applications of the catalyst. According to the catalyst, active carbon is taken as a carrier, Co element is taken as an active component, one or more elements selected from Al, B or Ga are taken as auxiliary agents. The catalyst comprises 1 to 30wt% of the active component (based on the content of Co), and 0.01 to 5wt% of the auxiliary agents. The catalyst is capable of increasing selectivity of the high carbon primary alcohols (more than 6 carbon atoms) in the mixed primary alcohols prepared via hydrogenation of CO. The high carbon primary alcohols can be used as main raw materials of washing agents, plasticizers, and the like.

Description

technical field [0001] The present invention relates to improving CO hydrogenation to generate high-carbon primary alcohols in mixed primary alcohols (C 6 Above) selective catalyst and preparation method and application thereof. Specifically, the present invention relates to a Co-based catalyst supported by activated carbon, in which additives such as Al, B or Ga are added to improve CO hydrogenation to synthesize high-carbon primary alcohols (C 6 above) optional. technical background [0002] C 6 ~C 18 High-carbon primary alcohols have unique and excellent properties and are widely used in many fields of the national economy. Among them, C 6 ~C 11 Higher carbon alcohols can be used as plasticizers, and C 12 ~C 18 Higher alcohols can be used as raw materials for surfactants. Compared with synthetic oil, synthetic high-carbon primary alcohols have larger output value per unit weight and higher added value. The market price of even-numbered high-carbon straight-chain p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C10G2/00
Inventor 丁云杰裴彦鹏朱何俊王涛吕元
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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