High-dispersion heavy-hydrocarbon Fischer-Tropsch synthetic catalyst based on carbonization processing method and preparation method thereof

A technology of Fischer-Tropsch synthesis and highly dispersed cobalt-based charges, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. It can solve difficult-to-reduce compounds and reduce catalyst activity and selectivity, poor dispersion and other issues

Active Publication Date: 2018-07-06
SYNFUELS CHINA INNER MONGOLIA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above-mentioned modification methods have made significant progress in improving the activity of cobalt-based Fischer-Tropsch synthesis catalysts, product selectivity, long-term operation stability and reactor adaptability, but still have not taken into account the performance of the above aspects at the same t

Method used

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  • High-dispersion heavy-hydrocarbon Fischer-Tropsch synthetic catalyst based on carbonization processing method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, preparation catalyst cat1, carbonization treatment and application

[0042] (1) Weigh 0.5g of nitric acid (according to HNO 3 ), weighed 1.5g of citric acid, and dissolved the two together in 30mL of deionized water; weighed 50g of commercially available Al 2 o 3 , add 2g of scallop powder and mix evenly; mix the above-mentioned powder with the solution thoroughly, extrude into strips, dry at 100°C for 8 hours, and roast at 500°C for 6 hours.

[0043] (2) Weigh 50g of the above-mentioned carrier, the final catalyst is calculated by (Ag+Ce) / Co=2 / 100, Ag / Ce=1 / 1, and weigh AgNO 3 and Ce(NO 3 ) 3 ·6H 2 O was dissolved in 50 mL of water, added to the above carrier for impregnation, impregnated for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 6 hours.

[0044] (3) Weigh 50 g of the above-mentioned Ag and Ce-containing carrier, the final catalyst is based on the Co content of 20wt%, the final catalyst is based on the total content of ethyl...

Embodiment 2

[0047] Embodiment 2, preparation catalyst cat2, carbonization treatment and application

[0048] (1) Weigh 2 g of citric acid and dissolve it in 30 mL of deionized water; weigh 40 g of Al 2 o 3 and 10gSiO 2 Mix evenly, and then add 2 g of scallop powder and mix evenly; mix the above powder and solution thoroughly, extrude, dry at 90°C for 8 hours, and roast at 500°C for 8 hours.

[0049] (2) Weigh 50g of the above-mentioned carrier, and the final catalyst is calculated according to Ru / Co=0.5 / 100, and Ru(NO)(NO 3 ) 3 , dissolved in 50mL of water, added to the above carrier for impregnation, impregnated for 4 hours, dried at 90°C for 8 hours, and calcined at 500°C for 8 hours.

[0050] (3) Weigh 50 g of the above-mentioned Ru-containing carrier, the final catalyst is based on the Co content of 22wt%, the final catalyst is based on the total content of ethylenediamine and citric acid / carrier=0.065, ethylenediamine: citric acid=1:1, weigh Cobalt nitrate, ethylenediamine and c...

Embodiment 3

[0053] Embodiment 3, preparation catalyst cat3, carbonization treatment and application

[0054] (1) Weigh 0.5g of nitric acid (according to HNO 3 ), weighed 1.5g of citric acid, and dissolved the two together in 30mL of deionized water; weighed 50g of commercially available Al 2 o 3 , add 2g of scallop powder and mix evenly; mix the above-mentioned powder with the solution thoroughly, extrude into strips, dry at 100°C for 8 hours, and roast at 500°C for 6 hours.

[0055] (2) Weigh 50g of the above-mentioned carrier, the final catalyst is calculated by (Ag+Ce) / Co=2 / 100, Ag / Ce=1 / 1, and weigh AgNO 3 and Ce(NO 3 ) 3 ·6H 2 O was dissolved in 50 mL of water, added to the above carrier for impregnation, impregnated for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 6 hours.

[0056] (3) Weigh the above-mentioned carrier containing Ag and Ce 50g, the final catalyst is based on the Co content of 20wt%, the final catalyst is based on the total content of ethylened...

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Abstract

The invention discloses a high-dispersion heavy-hydrocarbon Fischer-Tropsch synthetic catalyst based on a carbonization processing method and a preparation method thereof. The preparation method of the high-dispersion heavy-hydrocarbon Fischer-Tropsch synthetic catalyst comprises the following steps: loading a soluble salt of a metal additive on a formed carrier by using an impregnation method, drying and roasting to obtain a pre-processed carrier; loading a soluble cobalt salt and an organic matter on the pre-processed carrier by using the impregnation method, and drying to obtain the catalyst. According to the preparation method, a process of carbonization processing is introduced into a conventional evaluation step of reduction-Fischer-Tropsch synthesis of the catalyst, and the evaluation step is optimized as a step of reduction - synthesis gas processing - carbonization - H2 reprocessing, so the Co average grain size of the catalyst through the above actions is reduced. The secondary reduction is performed on the carbonized catalyst, the excess carbon deposition is eliminated, and thereby the Fischer-Tropsch reactivity of the catalyst is improved. Through the secondary reduction, the grain size is reduced, the activity point location is increased, and the reduction degree of the catalyst is further improved, so the performance of the catalyst is improved.

Description

technical field [0001] The invention relates to a highly dispersed heavy hydrocarbon Fischer-Tropsch synthesis catalyst based on a carbonization treatment method and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] The Fischer-Tropsch synthesis (FTS) process is a chemical process that converts synthesis gas into hydrocarbons, and is one of the most important ways to efficiently convert and utilize non-petroleum carbon-containing resources (natural gas, coal, residual oil, and biomass, etc.). Syngas generates a series of hydrocarbons with different carbon numbers under the action of catalysts (C 1 ~C 200 ), mainly straight-chain alkanes, and some low-carbon olefins and alcohols are obtained at the same time. The initial product is further processed (such as separation, hydrocracking or hydroisomerization, etc.) to obtain certain specifications of gasoline, diesel and other oil fuels, as well as chemicals s...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/83B01J37/02B01J37/08B01J37/18C10G2/00
CPCB01J23/83B01J23/8913B01J23/894B01J37/0201B01J37/0207B01J37/084B01J37/088B01J37/18C10G2/332C10G2/333
Inventor 燕来周建强郜文斌索海云王晓婷白皓宇杨勇李永旺
Owner SYNFUELS CHINA INNER MONGOLIA CO LTD
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