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Cobalt-based compounded catalyst and preparing method and application thereof

A catalyst and Tropsch synthesis technology, applied in the field of preparation of cobalt-based Fischer-Tropsch synthesis catalysts, can solve the problems of complex preparation process, increased catalyst cost, etc., and achieve the effects of high selectivity, promotion of adsorption and dissociation, and high reaction activity

Inactive Publication Date: 2010-04-28
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole preparation process is relatively complicated. After the catalyst is reduced and passivated, it still needs to be activated again before use, which greatly increases the cost of the catalyst.

Method used

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  • Cobalt-based compounded catalyst and preparing method and application thereof

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preparation example Construction

[0040] The preparation method of described cobalt-based Fischer-Tropsch synthesis catalyst is as follows:

[0041] Step (1) will predetermine the amount of Al 2 O 3 The carrier is put into a muffle furnace, calcined at 350~550℃ for 4~10h, taken out and placed in a desiccator for use;

[0042] Step (2) take by weighing the nitrates of cobalt nitrate, the second metal component and the third metal component of the calculated consumption, and dissolve them in deionized water together, so that they are fully dissolved and mixed uniformly;

[0043] Step (3) adopts the full-hole impregnation method, and the solution of step (2) is immersed in Al on a rotary evaporator. 2 O 3 On the carrier, vacuum drying at 70~110℃;

[0044] Step (4) The dried catalyst is aged at room temperature for 4-24 hours, then dried at 100-120° C. for 6-24 hours, and calcined at 300-500° C. for 2-24 hours to obtain a finished catalyst.

[0045] The preparation method of the described cobalt-based Fischer...

Embodiment 1

[0057] Weigh an appropriate amount of Al 2 O 3 For the carrier, 100 g of the carrier was pre-baked in a muffle furnace at 550° C. for 4 h and used for later use. Weigh 53.6g of cobalt nitrate hexahydrate, 1.7g of cerium nitrate hexahydrate, and 11.8g of ruthenium nitrosyl nitrate, dissolve them in deionized water, stir to fully dissolve and mix well, and dilute the solution volume to 110ml. The solution was impregnated to 100 g Al using the full pore impregnation method. 2 O 3on the carrier. The impregnated catalyst was vacuum-dried in a water bath at 80°C, and then aged at room temperature for 24h. After aging, it was placed in a muffle furnace and slowly heated to 120 °C, dried at 120 °C for 6 hours, and then heated to 500 °C for 8 hours. The composition of the prepared catalyst is: Co: Ce: Ru: Al 2 O 3 =10:0.5:3:86.5.

[0058] Catalyst activation was carried out on a pressurized fixed-bed reactor: take 20 ml of the prepared catalyst, put it into the reactor, and use...

Embodiment 2

[0061] Weigh an appropriate amount of Al 2 O 3 For the carrier, 100 g of the carrier was pre-baked at 350° C. in a muffle furnace for 10 h and used for later use. Weigh 93.8g of cobalt nitrate hexahydrate, 39.1g of lanthanum nitrate hexahydrate, and 4.65g of platinum nitrate, dissolve them in deionized water, stir to fully dissolve and mix them evenly, and dilute the solution volume to 90ml. Using the full pore dipping method, the solution was dipped into 95g Al 2 O 3 on the carrier. The impregnated catalyst was vacuum-dried in a water bath at 90°C, and then aged at room temperature for 4h. After aging, it was placed in a muffle furnace and slowly heated to 110 °C, dried at 110 °C for 6 h, and then heated to 400 °C for 16 h. The composition of the prepared catalyst is: Co:La:Pt:Al 2 O 3 =15:10:1:74.

[0062] Catalyst activation was carried out on a pressurized fixed-bed reactor: take 20ml of the prepared catalyst, put it into the reactor, pure H 2 (purity>99.9%) is a ...

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Abstract

The invention provides a cobalt-based compounded catalyst and preparing method and application thereof, comprising a carrier component and a metal component; the carrier uses spherical powder Al2O3; the metal component comprises a first metal component Co; a second metal component is one of Ce, La and Zr; a third metal component is one of Pt, Ru, Rh and Re; the weight percentage of each metal component in the finished catalyst is as follows: the first metal component is 10-35%; the second metal component is 0.5-10%; the third metal component is 0.05-3%; and the rest is aluminum oxide carrier. The invention is cobalt-based compounded catalyst with the diesel oil and paraffin as the main products; and the catalyst is applied for slurry bubble column reactor or continuous-stirring reactor with simple preparing method, less selectivity in methane, high reacting activity and good selectivity in C5+.

Description

technical field [0001] The invention relates to a cobalt-based Fischer-Tropsch synthesis catalyst and a preparation method and application thereof, in particular to a preparation method and application of a cobalt-based Fischer-Tropsch synthesis catalyst used in a slurry bed reactor. Background technique [0002] Fischer-Tropsch synthesis refers to syngas (CO+H 2 ) The reaction of converting into hydrocarbons on a catalyst, the products include various alkanes and alkenes, and by-product CO 2 , H 2 O and organic oxygenates such as alcohols, aldehydes, ketones, acids and esters can be obtained through deep processing to obtain high-quality liquid fuels such as gasoline, diesel, aviation kerosene, etc. It was invented by German scientists Frans Fischer and Hans Tropsch in 1923, so it is referred to as Fischer-Tropsch synthesis or F-T synthesis. [0003] In recent years, with the increasing shortage of crude oil resources in the world and the fluctuation of crude oil prices,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/889B01J21/04C10G2/00
Inventor 宋德臣郑申棵张金桥刘倩倩许莉龚焱
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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