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Method for deoxidizing iron base catalyst of Fisher-Tropsch synthesis in slurry bed

An iron-based catalyst and Fischer-Tropsch synthesis technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of unsuitable slurry bed reactors, etc., and achieve strong anti-wear performance, Good stability and high activity

Active Publication Date: 2005-01-12
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Also disclosed in the journal Applied catalysis A: General, 1999, 126, 85-113 by Burkur et al. from Texas A&M University in the United States 2 , pure CO and H 2 The reduction method of Fe / Cu / K catalyst by syngas with / CO being 0.67, but this reduction method is aimed at fixed bed reactor, not suitable for slurry bed reactor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Add 350 grams of hydrocarbon liquid medium with a boiling point greater than 340 ° C and 20 grams of industrial fresh produced by coprecipitation into 1 liter of mechanically stirred slurry bed reactor. The composition is 100Fe / 4Cu / 4K / 20SiO 2 Catalyst, mechanically stirred to make fresh Fe / Cu / K / SiO 2 The catalyst is uniformly suspended in the hydrocarbon liquid medium.

[0030] 2. Using syngas H 2 / CO=0.70 (molar ratio) completely replace the air in the reactor at normal temperature and pressure, and the space velocity of the synthesis gas during the replacement is 1000h -1 .

[0031] 3. Using syngas H 2 / CO=0.70 (molar ratio) Raise the pressure of the reactor to 1.0MPa, and the space velocity of the syngas during the boost is 1000h -1 .

[0032] 4. Keep the space velocity and molar ratio of the synthesis gas constant, and start the in-situ reduction of the catalyst by temperature programming. First, heat up to 120°C at a heating rate of 1°C / min and stay at thi...

Embodiment 2

[0035] 1. Add 400 grams of hydrocarbon liquid medium with a boiling point greater than 340 °C and 30 grams of industrial spherical fresh weight ratio composition produced by a combination of continuous coprecipitation and spray drying molding into a 1-liter mechanically stirred slurry bed reactor 100Fe / 6Cu / 5K / 30SiO 2 Catalyst, mechanically stirred to make fresh Fe / Cu / K / SiO 2 The catalyst is uniformly suspended in the hydrocarbon liquid medium.

[0036] 2. Using syngas H 2 / CO=0.90 (molar ratio) completely replace the air in the reactor at normal temperature and pressure, and the space velocity of the synthesis gas during the replacement is 800h -1 .

[0037] 3. Using syngas H 2 / CO=0.90 (molar ratio) Raise the pressure of the reactor to 0.8MPa, and the space velocity of the synthesis gas during the boost is 800h -1 .

[0038] 4. Keep the space velocity and molar ratio of the synthesis gas constant, and start the in-situ reduction of the catalyst by temperature programmin...

Embodiment 3

[0041] 1. Add 500 grams of hydrocarbon liquid medium with a boiling point greater than 340 °C and 35 grams of industrial fresh produced by impregnation into 1 liter of mechanically stirred slurry bed reactor. The composition is 100Fe / 8Mn / 6Cu / 3K / 20SiO 2 Catalyst, mechanically stirred to make fresh Fe / Mn / Cu / K / SiO 2 The catalyst is uniformly suspended in the hydrocarbon liquid medium.

[0042] 2. Using syngas H 2 / CO=1.0 (molar ratio) completely replace the air in the reactor at normal temperature and pressure, and the space velocity of the synthesis gas during the replacement is 1000h -1 .

[0043] 3. Using syngas H 2 / CO=1.0 (molar ratio) Raise the pressure of the reactor to 0.4MPa, and the space velocity of the syngas during the boost is 1000h -1 .

[0044] 4. Keep the space velocity and molar ratio of the synthesis gas constant, and start the in-situ reduction of the catalyst by temperature programming. First heat up to 140°C at a heating rate of 1°C / min and stay at thi...

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Abstract

A process for reducing the Fe-base catalyst used for slurry-bed Fischer-Tropsch synthesis includes such steps as adding the liquid-phase hydrocarbon compound whose boiling point is higher than 34 deg.C and proper Fe-base catalyst to slurry-bed reactor, displacing the air in the reactor system by inertial gas or synthetic gas, raising pressure, program-controlled raising temp, in-situ reducing for 15-94 hrs, and direct Fischer-Tropsch synthesizing.

Description

technical field [0001] The invention belongs to a catalyst reduction method, in particular to an in-situ synthesis gas reduction method of a gas-liquid-solid three-phase slurry bed Fischer-Tropsch synthesis industrial iron-based catalyst. Background technique [0002] Fischer-Tropsch synthesis refers to the synthesis gas (H 2 +CO) catalyzes the reaction process of synthesizing hydrocarbon liquid fuels on the catalyst. The conversion of raw coal into high-quality liquid fuels and high value-added chemicals through synthesis gas to achieve rational, efficient and clean utilization of coal has always been highly valued by international research and development institutions and the industry, especially in some coal-rich and oil-deficient countries. regions and countries. It can not only protect the environment, but also make up for the relative shortage of oil resources. Iron-based catalysts are the most commonly used type of Fischer-Tropsch synthesis catalysts, which are esp...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J37/16C07C1/04
Inventor 白亮郝庆兰刘福霞相宏伟李永旺
Owner SYNFUELS CHINA TECH CO LTD
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