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Fischer-Tropsch synthesis method for increasing liquid hydrocarbon selectivity

A technology of Fischer-Tropsch synthesis and liquid hydrocarbons, which is applied in the direction of producing hydrocarbons from carbon oxides. It can solve problems such as complexity, reduced processing capacity, and affecting operational stability, and achieves the effect of simple operation and improved selectivity.

Active Publication Date: 2008-05-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under the action of Co-based catalyst, the selectivity of heavy hydrocarbons can be improved by reducing the space velocity, continuously removing the catalyst from the reactor and replenishing fresh catalyst, and its stable C 5 + Selectivity is higher (about 85% by weight), but, the obvious defect of this method is, because the reduction of space velocity not only has influence on the stability of operation, makes processing capacity reduce simultaneously, constantly removes catalyzer and replenishes fresh catalyzer and also makes this method getting complicated

Method used

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  • Fischer-Tropsch synthesis method for increasing liquid hydrocarbon selectivity
  • Fischer-Tropsch synthesis method for increasing liquid hydrocarbon selectivity

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preparation example Construction

[0026]Those skilled in the art know that, selected from Li, Na, K, Mg, Ca, Sr, Cu, Mo, Ta, W, Ru, Zr, Ti, REO, Re, Hf, Ce, Mn, Fe, V and noble metals (such as Pt, Pd, Rh, Ir, etc.) one or more additive components are commonly used additive components for Fischer-Tropsch synthesis catalysts known in the art. The catalyst according to the present invention preferably contains one or more selected from the above auxiliary components. When the catalyst contains the above auxiliary components, the preparation method of the catalyst further includes the step of introducing the auxiliary components into the catalyst. They may be introduced before, after, or simultaneously with the cobalt metal component. When the auxiliary components are introduced alone, the present invention has no limitation on the introduction method of the auxiliary. For example, the compound containing auxiliary components is formulated into an aqueous solution, and then impregnated by a conventional impregna...

Embodiment 1

[0036] Weigh 300g γ-Al 2 o 3 Carrier (product of Changling Catalyst Factory, particle size 16-26 mesh), the carrier is placed in a muffle furnace, roasted at 600 ° C for 3 hours, after cooling to room temperature, take 10 grams, and place it in a container filled with 30 milliliters of distilled water. Place in a beaker (specification: 50 ml) for 2 hours, then separate the water-absorbed carrier from water, record the water absorption volume, and calculate the water absorption rate to be 0.9 ml / g.

[0037] Weigh the above γ-Al 2 o 3 Carrier 30 grams, get 5.5 grams of cobalt nitrate and dissolve into the solution of 8.1 milliliters, under agitation, this solution adopts spray method to spray on described carrier (V L / V C =0.3), then baked at 120° C. for 4 hours in an oven, followed by sintering at 500° C. for 4 hours in a muffle furnace, and repeated the operation three times to obtain catalyst C1. The composition of C1 is listed in Table 1.

Embodiment 2

[0039] Weigh the γ-Al of Example 1 2 o 3 Carrier 30 grams, get 8.3 grams of cobalt nitrate and dissolve into the solution of 13.5 milliliters, under agitation, this solution adopts spray method to spray on above-mentioned carrier (V L / V C =0.5), then baked at 120° C. for 4 hours in an oven, followed by sintering at 500° C. for 4 hours in a muffle furnace, and repeated the operation twice to obtain catalyst C2. The composition of C2 is listed in Table 1.

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Abstract

The invention relates to a fischer-tropsch synthesis method that improves liquid hydrocarbon selectivity, consisting of the procedures: mixed hydrogen and carbon monoxide are contacted with fischer-tropsch synthesis catalyst in a reactor (3) in fischer-tropsch synthesis reaction condition; material flowing out of the reactor (3) enters a hot high-pressure separator (5) for liquid-gas separation and the liquid therein is recycled as a crude product of fischer-tropsch synthesis; the gas enters a cold high-pressure separator (8) for liquid-gas separation, and water therein is discharged out; hydrocarbon gas and liquid hydrocarbon enter a reactor (12) to be contacted with the fischer-tropsch synthesis catalyst in fischer-tropsch synthesis reaction condition; material flowing out of the reactor (12) enters a hot high-pressure separator (14) for liquid-gas separation, and the liquid therein is recycled as a crude product of fischer-tropsch synthesis; the gas enters a cold high-pressure separator (21) for liquid-gas separation, with some or all of the gas entering the reactor (3) and / or the reactor (12) for circulating; the liquid enters a low-pressure separator (23) for hydrocarbon-water separation, and the hydrocarbon product is recycled.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis method. Background technique [0002] It is a good alternative petroleum technology to produce synthesis gas from carbon and hydrogen-containing resources such as natural gas, bitumen, coal, and biomass, and then use synthesis gas as raw material to produce liquid hydrocarbons through Fischer-Tropsch synthesis. [0003] In the prior art, there are many patent documents about the production of liquid hydrocarbons through Fischer-Tropsch synthesis using syngas as raw material, among which, how to improve the C by improving the Fischer-Tropsch synthesis reaction process and / or catalyst 5 + Product yield has always been a major concern of people. [0004] US4579986 discloses a method for producing liquid hydrocarbons through Fischer-Tropsch synthesis under the action of a cobalt-based catalyst. The selectivity of C1-C4 gas hydrocarbons described in the patent method is 18%-28.5% by weight, and the sel...

Claims

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Application Information

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IPC IPC(8): C07C1/06
Inventor 吴昊胡志海李毅聂红田鹏程侯朝鹏夏国富
Owner CHINA PETROLEUM & CHEM CORP
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