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Cobalt-based Fischer-Tropsch synthesis catalyst and preparation method thereof

A technology for Tropsch synthesis and catalyst, which is applied in the field of cobalt-based Fischer-Tropsch synthesis catalyst and its preparation, can solve the problems of affecting the activity and increasing the production cost, and achieves the effects of improved stability and outstanding comprehensive performance.

Active Publication Date: 2015-04-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned prior art has made significant progress in certain aspects such as improving the activity of cobalt-based Fischer-Tropsch synthesis catalysts, long-term operation stability, and controlling production costs, but it does not take into account the performance of various aspects at the same time. For example, although CN200580043067.2 improves The stability of the catalyst is improved, but the activity is affected, and the production cost is also greatly increased

Method used

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  • Cobalt-based Fischer-Tropsch synthesis catalyst and preparation method thereof

Examples

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example 1

[0022] Prepare a mixed solution of lanthanum nitrate and ferric nitrate, the molar concentration of lanthanum ions and iron ions is 2mol / L. Weigh commercially available silica gel (the pore volume is 1.06ml / g, the specific surface area is 386.81m 2 / g, the silica gel used in the following examples) 30g, distilled water was added dropwise to initial moistening, and the volume of consumed water was 48ml. The mixed solution of lanthanum nitrate and ferric nitrate was impregnated by the over-volume impregnation method, the impregnation temperature was 50°C, and the impregnation time was 3 hours. After impregnation, the excess solution was filtered off, dried at 120°C for 5 hours, and roasted in pure oxygen for 6 hours at a roasting temperature of 850°C. Based on the final catalyst zirconium content of 1wt%, weigh 1.41g of zirconium nitrate trihydrate, add distilled water to 48g, wait for complete dissolution, add to the above-mentioned roasted carrier for impregnation, aging for 3...

example 2

[0025] Prepare the mixed solution of cerium nitrate and nickel nitrate, the molar concentration of cerium ion and nickel ion is 3mol / L. Weigh 30 g of the commercially available silica gel used in Example 1, and impregnate the mixed solution of cerium nitrate and nickel nitrate above by the over-volume impregnation method. The impregnation temperature is 60°C, and the impregnation time is 2h. After impregnation, the excess solution is filtered off and dried at 90°C for 10h. , Calcined in pure oxygen for 4h, the calcining temperature is 900℃. The rest are the same as in Example 1, and the obtained catalyst is denoted as CFT-2, and the evaluation results are shown in Table 1.

example 3

[0027] Prepare a mixed solution of neodymium nitrate and zinc nitrate, the molar concentration of neodymium ions and zinc ions is 1mol / L. Weigh 30 g of the commercially available silica gel used in Example 1, and impregnate the mixed solution of neodymium nitrate and zinc nitrate by using the over-volume impregnation method. The impregnation temperature is 40°C, and the impregnation time is 5h. After impregnation, the excess solution is filtered off and dried at 90°C for 10h. , calcined for 4 hours in a nitrogen-oxygen mixture with an oxygen volume fraction of 70%, and the calcining temperature was 800°C. The rest are the same as in Example 1, and the obtained catalyst is denoted as CFT-3, and the evaluation results are shown in Table 1.

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Abstract

The invention discloses a preparation method of a cobalt-based Fischer-Tropsch synthesis catalyst, and the preparation method comprises the following steps: (1) preparing a mixed solution containing a rare earth metal and a transition metal; (2) dipping silica as a carrier in the mixed solution of the step (1), drying, roasting at 700 DEG C ~ 1000 DEG C for 1h-10h, preferably roasting at 800 DEG C ~ 900 DEG C for 2h-8h; and (3) loading active component cobalt and metal additives onto the roasted carrier of the step (2), and drying and roasting to prepare the final cobalt-based Fischer-Tropsch synthesis catalyst. The catalyst prepared by the preparation method has the advantages of high activity stability, low cost and good comprehensive performances.

Description

technical field [0001] The invention relates to a cobalt-based Fischer-Tropsch synthesis catalyst and a preparation method thereof, in particular to a low-cost, high-activity and stable cobalt-based Fischer-Tropsch synthesis catalyst and a preparation method thereof. Background technique [0002] It is an indisputable fact that my country is a net oil importer. As of 2010, my country's imported crude oil has exceeded 50% of the domestic processing volume. With the development of the national economy and increasingly stringent environmental protection regulations, the gap between the supply and demand of clean and high-quality fuel oil in my country is getting bigger and bigger. Fuel producers must seek new energy supply methods. The core of F-T synthesis technology is to process coal, natural gas, biomass and other raw materials into synthesis gas (CO, H 2 ), and then converted into liquid fuel through the action of catalyst. This technology can not only produce clean fuel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C10G2/00
Inventor 袁长富李杰张舒冬倪向前尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP