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Hydrophobic organic modification of Co group Fischer-Tropsch synthesized catalyst, preparing and applications thereof

A cobalt-based catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbon production from carbon oxides, etc., can solve the problem of complex preparation, high cost, and supported cobalt catalysts. problems such as low reduction degree, to achieve the effect of simple preparation, low cost and easy operation

Inactive Publication Date: 2008-07-23
中科潞安能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, mesoporous silicon molecular sieves are easy to form cobalt silicate species with cobalt oxides, resulting in a lower reduction degree of supported cobalt catalysts; although mesoporous zirconium molecular sieves do not form compounds with cobalt, their preparation is complicated and costly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.22g RuCl 3 and 5.35g Co(NO 3 ) 2 ·6H 2 O is made into 18ml aqueous solution, impregnated with 20g porous silica gel (specific surface area 300m 2 / g), let stand for 12h, dry at 100°C, and bake at 300°C for 10h to prepare a cobalt sample supported on porous silica gel.

[0030] Weigh 10.0g of the above-mentioned porous silica gel-loaded cobalt sample, put it into a dry and clean Erlenmeyer flask, and add 40ml of toluene to it, slowly add 2ml of methyltriethoxysilane dropwise under stirring, and then put the above reaction system Enter into an ultrasonic cleaner, vibrate with ultrasonic waves (working frequency 30KHz) for 2h, filter with suction, extract with toluene and acetone for 24h respectively, vacuum dry at 50°C for 20h, press into tablets, and sieve to obtain 5 (wt%) Co, Hydrophobically modified cobalt-supported porous silica gel catalyst with 0.5 (wt%) Ru and 0.7 (wt%) methyl silicon (expressed by R1) 5%Co0.5%Ru0.7%R1 / SiO 2 .

[0031] Fill a pressurized f...

Embodiment 2

[0033] 0.54g H 2 PtCl 6 and 18.84g Co(NO 3 ) 2 ·6H 2 O is made into 30ml solution, impregnated with 20g porous silica gel (specific surface area 200m 2 / g), let stand for 12h, dry at 100°C, and bake at 350°C for 8h to prepare a cobalt sample supported on porous silica gel.

[0034] Weigh 10.0g of the above-mentioned porous silica gel-loaded cobalt sample, put it into a round bottom flask, and add 40ml of toluene to it, slowly add 2.5ml of dimethyldiethoxysilane dropwise under stirring, continue to shake for a while, and heat to reflux for 12~ For 48 hours, extract with toluene and acetone respectively, vacuum dry at 60°C for 20 hours, press into tablets, and sieve to obtain a compound containing 15 (wt%) of Co, 0.8 (wt%) of Pt and dimethyl silicon (represented by R2) ) is 0.8 (wt%) hydrophobically modified cobalt supported porous silica catalyst 15%Co0.8%Pt0.8%R2 / SiO 2 .

[0035] Fill a pressurized fixed bed reactor (Φ0×500mm) with 1.5ml of the above-mentioned catalyst ...

Embodiment 3

[0037] 1.68g Re 2 o 7 and 12.6g Co(NO 3 ) 2 .6H 2 O is made into 23ml solution, impregnated with 20g porous silica gel (specific surface area 180m 2 / g), let stand for 12h, dry at 100°C, and bake at 350°C for 8h to prepare a cobalt sample supported on porous silica gel.

[0038] Weigh 10.0g of the above-mentioned porous silica gel-loaded cobalt sample, spread evenly on a piece of filter paper, then place the filter paper on a self-made small shelf, and move it into the reaction kettle together, and then add 3ml of trimethylchlorosilane to the reaction kettle , after the reaction kettle was covered and sealed, it was moved into an oven, and the temperature was raised to 50°C to accelerate the occurrence of the silanization reaction. After 2 hours of reaction, the sample was taken out, vacuum-dried at 60°C for 30 hours, pressed into tablets, and sieved to obtain a Co-containing 10 (wt%), Re is 0.5 (wt%) and trimethylsilane (represented by R3) is 0.9 (wt%) hydrophobically mo...

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Abstract

A Cobalt catalyst for the Fischer-Tropsch synthesis of Hydrophobic and organic modification comprises an active component, a promoter, a carrier and a grafted hydrophobic radical, wherein the weight percentages of the components are that metal cobalt takes 3-35%, porous silica gel takes 53-96%, noble metal takes 0.01-2%, and the hydrophobic radical takes 0.05-10%. The cobalt nitrate and noble metal nitrate or chloride water solution is applied to impregnate the porous silica gel to produce porous silica gel supported cobalt sample; then the hydrophobic radical on the organosilane are grafted onto the sample surface by applying a back grafting method. The invention can synthesize middle distillate oil (C5-C11 alkane) by the synthesis gas through a high selective step, shorten process flow and reduce production cost.

Description

technical field [0001] The invention belongs to a catalyst and its preparation and application, in particular to a hydrophobic organically modified cobalt-based Fischer-Tropsch synthesis catalyst and its preparation and application. Background technique [0002] With the development of the economy and the improvement of environmental awareness, especially the depletion of oil resources, it is decided that the technology of producing clean and environmentally friendly liquid fuels via the GTL route will be developed rapidly. Fischer-Tropsch synthesis is an important way for indirect conversion of coal or natural gas into clean liquid fuels through synthesis gas. The hydrocarbon products obtained in this process can be further processed to obtain liquid fuel products with low sulfur, low nitrogen, low aromatics and low metal content. Therefore, In recent years, research and application in this field have attracted more and more attention. However, the distribution of hydrocar...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C1/04
Inventor 孙予罕石利红李德宝侯博
Owner 中科潞安能源技术有限公司
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