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Microsphere shaped iron based catalyst in use for Fischer-Tropsch synthesis under high temperature, and preparation method

An iron-based catalyst, Fischer-Tropsch synthesis technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as non-spray drying molding, achieve smooth surface, large processing capacity, reduce The effect of production costs

Active Publication Date: 2009-06-17
YANKUANG ENERGY R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scope of application of the above two examples is limited to small-scale preparation in the laboratory, and there is no attempt to spray dry molding

Method used

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  • Microsphere shaped iron based catalyst in use for Fischer-Tropsch synthesis under high temperature, and preparation method
  • Microsphere shaped iron based catalyst in use for Fischer-Tropsch synthesis under high temperature, and preparation method
  • Microsphere shaped iron based catalyst in use for Fischer-Tropsch synthesis under high temperature, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 43kg Fe(NO 3 ) 3 .9H 2 O dissolved in deionized water, diluted to 100 liters of solution, the above-mentioned iron-containing solution was added to the reaction kettle, heated to 62 ° C, and 7% ammonia water was dropped into the iron-containing solution during rapid stirring to form a precipitation slurry until the pH value was 8 Stop dripping ammonia water, obtain coprecipitation filter cake after filtering, washing. Add the co-precipitation filter cake to 40L of deionized water to make a slurry, weigh Cr(NO 3 ) 3 .9H 2 O 2.8kg, Cu(NO 3 ) 2 .3H 2 O 11g, KNO 3 55g, NaNO 3 25 g, dissolved in deionized solution, made into 7 liters of solution, added to the above slurry, stirred to make it fully mixed, and soaked at 46°C for 30 minutes. The obtained slurry was spray-dried at an inlet hot air temperature of 260° C. and an outlet hot air temperature of 125° C., and calcined at 350° C. for 3 hours to obtain 8.2 kg of the final catalyst, which was named A.

Embodiment 2

[0037] According to embodiment 1 step, obtain coprecipitation filter cake, add deionized water 30L beating, weigh Cr(NO 3 ) 3 .9H 2 O 150g, Cu(NO 3 ) 2 .3H 2 O 1.3kg, KNO 3 40g, NaNO 3 44 g, dissolved in deionized solution, made into 10 liters of solution, added to the above slurry, stirred to make it fully mixed, heated to 75°C, and stirred for 120 minutes. The obtained slurry was spray-dried at an inlet hot air temperature of 350°C and an outlet hot air temperature of 115°C, and calcined at 400°C for 6 hours to obtain 8.4 kg of the final catalyst, which was named B.

Embodiment 3

[0039]Dissolve 7kg of iron powder in 70L of 45% nitric acid, dilute to 90 liters, add the above-mentioned iron-containing solution into the reaction kettle, and drop 5% ammonia water into the iron-containing solution under room temperature to form a precipitation slurry until the pH value is 5.6 Stop the dropwise addition of ammonia water, filter and wash to obtain a co-precipitated filter cake. Move the co-precipitation filter cake into a beaker, add 25L of deionized water to make a slurry, weigh Cr(NO 3 ) 3 .9H 2 O 3.2kg, Cu(NO 3 ) 2 .3H 2 O 120g, KNO 3 4.4g, NaNO 3 450g, dissolved in deionized solution, made into 8 liters of solution, added to the above slurry, stirred to make it fully mixed, heated to 70°C, and stirred for 120 minutes. The obtained slurry was spray-dried at an inlet hot air temperature of 375°C and an outlet hot air temperature of 140°C, and roasted at 500°C for 3 hours to obtain 9.8 kg of the final catalyst, which was named C.

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Abstract

A microspherical Fe-based catalyst for high-temp Fischer-Tropsch synthesis contains proportionally Fe, Cu, Cr, K2O and Na2O, and is prepared through dissolving iron nitrate, adding the solution of sodium carbonate, depositing, filtering, washing to obtain filtered cake, adding water, beating, adding the solution containing Na, K, Cr and Cr, ageing, spray drying and calcining.

Description

technical field [0001] The invention belongs to a preparation method of a catalyst, in particular to a Fischer-Tropsch synthesis iron-based catalyst and a preparation method thereof. Background technique [0002] Fischer-Tropsch synthesis reaction (F-T Synthesis) is synthesis gas (CO+H 2 ) is converted into the core process of hydrocarbon liquid fuel on a catalyst, which was invented by German chemists Fischer and Tropsch in 1923. Syngas is produced by converting natural gas or by coal gasification. Fischer-Tropsch synthesis uses iron-based or cobalt-based catalysts. Generally speaking, cobalt-based catalysts are suitable for synthesis gas obtained from natural gas conversion. Iron-based catalysts have good conversion activity and sulfur tolerance, and are suitable for coal-based Fischer-Tropsch synthesis. Synthesis. In recent years, with the huge market demand for liquid fuels brought about by the growth of the world economy, the price of crude oil has maintained an upwa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/86B01J37/03C07C1/04
Inventor 孙启文蒋凡凯杨文书周标杨跃刘晓露
Owner YANKUANG ENERGY R&D CO LTD
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