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Iron-based catalyst used for Fischer-Tropsch synthesis and preparation method thereof

An iron-based catalyst, Fischer-Tropsch synthesis technology, used in catalyst activation/preparation, preparation of liquid hydrocarbon mixtures, chemical instruments and methods, etc.

Inactive Publication Date: 2009-10-21
YASHENTECH CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since small changes in the catalyst composition may lead to great changes in the performance of the catalyst, in order to improve some properties of the iron-based catalyst, such as changing its selectivity to a certain product, improving the activity of the catalyst and prolonging the service life of the catalyst, etc., The industry's research on iron-based catalysts has never stopped

Method used

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  • Iron-based catalyst used for Fischer-Tropsch synthesis and preparation method thereof
  • Iron-based catalyst used for Fischer-Tropsch synthesis and preparation method thereof
  • Iron-based catalyst used for Fischer-Tropsch synthesis and preparation method thereof

Examples

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Embodiment 1

[0031] Such as figure 1 As shown, a method 100 for making an iron-based catalyst for Fischer-Tropsch synthesis includes configuring Fe / Mn mixed solution step 101, co-precipitation step 103, static aging step 105, centrifugal separation and washing step 107, drying and roasting step 109, Step 111 of dipping and drying, step 113 of roasting and step 115 of tablet molding. When implementing configuration Fe / Mn mixed solution step 101, the Fe(NO 3 ) 3 9H 2 O and 50wt% Mn(NO 3 ) 2 solution and water to prepare a mixed solution. Table 1 shows that the iron-based catalysts corresponding to the Fe / Mn molar ratios of 9 / 1, 7 / 3, 6 / 4, 5 / 5, 4 / 6, 3 / 7 and 2 / 8 should be added when implementing step 101 Fe(NO 3 ) 3 9H 2 O and Mn(NO 3 ) 2 amount. When carrying out the co-precipitation step 103, a precipitating agent can be added to the above-mentioned mixed solution of iron and manganese nitrates, while stirring for co-precipitation, and the addition of the precipitating agent is st...

Embodiment 2

[0038] This example uses figure 1 In the preparation method shown, when carrying out the co-precipitation step 103, in one embodiment, NH with a concentration of 1.3 mol / liter can be prepared 4 HCO 3 solution 400 ml, then the NH 4 HCO 3 The solution was added to the mixed solution of iron and manganese nitrates to cause co-precipitation, and the addition of NH was stopped when the pH value reached 7.5. 4 HCO 3 . Other steps are similar to those disclosed in Example 1, so they will not be repeated.

[0039] Catalysts thus prepared can also be Figure 9 Reduction and testing are carried out in the shown reactor system, and the reduction and testing conditions can be the same as those in Example 1. See the reaction result image 3 shown.

[0040] exist image 3 Among them, the curves 301, 302, 303, 304, 305, 306 and 307 respectively represent that the Fe / Mn molar ratio is 6 / 4, 5 / 5, 4 / 6, 7 / 3, 3 / 7, 2 / 8 and 9 / 1 when the reactivity of the catalyst. Such as image 3 As s...

Embodiment 3

[0042] Such as Figure 4 As shown, in another embodiment of the present invention, a method 400 of making an iron-based catalyst for Fischer-Tropsch synthesis includes configuring Fe / Mn mixed solution step 401, utilizing sol-gel method to prepare colloid step 403, drying and Decomposition step 405, roasting step 407, dipping and drying step 409, roasting step 411 and tablet forming step 413. When implementing configuration Fe / Mn mixed solution step 401, the Fe(NO 3 ) 3 9H 2 O, 50wt% Mn(NO 3 ) 2 solution and water to prepare a mixed solution. Table 1 shows that the iron-based catalysts corresponding to the Fe / Mn molar ratios of 9 / 1, 7 / 3, 6 / 4, 5 / 5, 4 / 6, 3 / 7 and 2 / 8 should be added when implementing step 101 Fe(NO 3 ) 3 9H 2 O and Mn(NO 3 ) 2 amount. When implementing step 403 of preparing jelly by sol-gel method, another mixed solution can be prepared, and this mixed solution is added to the mixed solution of iron manganese nitrate, and stirred while adding to obtain...

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Abstract

The invention relates to an iron-based catalyst used for Fischer-Tropsch synthesis and a preparation method thereof. The catalyst contains iron, manganese, copper and potassium; wherein the molar ratio of the iron and manganese is less than 7:3; the weight percentage of the copper in the catalyst is approximately 0.5wt%; the weight percentage of the potassium in the catalyst is less or equal to 1 wt%; further, in the iron-based catalyst, the molar ratio of the iron and manganese is 5:5 to 6:4; the weight percentage of the potassium is approximately 0.4-2.2 wt%; the weight percentage of the copper is approximately 0.5wt%. The catalyst can be used for increasing the conversion rate of the carbon monoxide in the Fischer-Tropsch synthesis and reduces the generation the carbon monoxide.

Description

【Technical field】 [0001] The invention relates to a catalyst and a preparation method thereof, in particular to an iron-based catalyst for Fischer-Tropsch Synthesis and a preparation method thereof. 【Background technique】 [0002] Fischer-Tropsch synthesis is the synthesis gas (CO+H 2 ) is converted into hydrocarbons under the action of a catalyst. At present, in the industrialization of Fischer-Tropsch synthesis, iron-based catalysts are widely used because of their better activity and adaptability to a wider reaction temperature range. [0003] Since small changes in the catalyst composition may lead to great changes in the performance of the catalyst, in order to improve some properties of the iron-based catalyst, such as changing its selectivity to a certain product, improving the activity of the catalyst and prolonging the service life of the catalyst, etc., The industry's research on iron-based catalysts has never stopped. 【Content of invention】 [0004] The objec...

Claims

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Application Information

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IPC IPC(8): B01J23/889C07C1/04
CPCB01J37/0205B01J37/036B01J37/03B01J2219/00306B01J23/8892B01J35/0013C10G2/332B01J35/23
Inventor 卞国柱毛华平韩晖丛佩军
Owner YASHENTECH CORP
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