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Reduction method of syrup state bed Fischer Tropsch synthesis iron base catalyst

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 problems that do not involve anti-wear performance, and achieve easy control of reduction conditions and simplified operations Steps, the effect of saving energy

Active Publication Date: 2005-08-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This reduction method uses a catalyst prepared by spray-drying molding technology, and the Fischer-Tropsch synthesis operation reaction time is 400-1000 hours, but it does not involve anti-wear performance

Method used

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Examples

Experimental program
Comparison scheme
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specific Embodiment approach

[0024]Several specific embodiments of the present invention are described in detail below, and the protection scope of the present invention is not limited by these embodiments.

[0025] The product collection method and analysis test method of the Fischer-Tropsch synthesis reaction system used in the embodiment of the present invention:

[0026] 1. The product collection method of the reaction system: the raw material gas is measured by a mass flow meter, the heavy hydrocarbon product of the wax phase is collected by a wax trap (180 ° C), and the oil phase and water phase products are collected by a hot trap (105 ° C) and a cold trap (0 ℃), the uncondensable gas phase products are measured by a wet flow meter and then vented. The product is collected every 24 hours and the material balance is calculated. During the material leveling period, the tail gas is guaranteed to be analyzed more than 3 times, and the material level is maintained at about 97%.

[0027] 2. Product anal...

Embodiment 1

[0030] 1. Add hydrocarbon liquid with a boiling point greater than 340 ° C and fresh iron-based catalyst in the slurry bed reactor, the content of the catalyst in the slurry is 8wt%, mechanical stirring in the slurry bed reactor or generated by a gas distributor The continuous upward bubbling small bubbles make the catalyst evenly dispersed in the slurry of the reactor;

[0031] 2. Use an inert gas to completely replace the air in the slurry bed reactor system at normal temperature and pressure, and then raise the pressure of the slurry bed reactor to 0.1MPa under an inert gas atmosphere, and the gas space velocity is 500h when increasing the pressure -1 .

[0032] 3. Adjust the space velocity of the inert gas to 3000h -1 , and then heat the temperature of the slurry bed reactor to 100°C at a temperature increase rate of 0.2°C / min, and stay in this temperature range for 3 hours, and then raise the temperature of the slurry bed reactor at a temperature increase rate of 0.1°C / m...

Embodiment 2

[0038] 1. Add hydrocarbon liquid with a boiling point greater than 340°C and fresh iron-based catalyst in the slurry bed reactor, the content of the catalyst in the slurry is 10wt%, mechanical stirring in the slurry bed reactor or generated by a gas distributor The continuous upward bubbling small bubbles make the catalyst evenly dispersed in the slurry of the reactor;

[0039] 2. Use H 2 Under normal temperature and pressure, the air in the slurry bed reactor system is completely replaced, and then in H 2 Raise the pressure of the slurry bed reactor to 0.5MPa under the atmosphere, and the gas space velocity is 1000h when the pressure is raised -1 .

[0040] 3. Adjust H2 airspeed to 2000h -1 , then heat the temperature of the slurry-bed reactor to 120°C at a temperature increase rate of 0.2°C / min, and stay in this temperature range for 5 hours, and then raise the temperature of the slurry-bed reactor at a temperature increase rate of 0.1°C / min to 260°C, and reduced at this...

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Abstract

A reduction process for Fischer-Tropsch synthesis of iron-base catalyst in slurry bed includes adding liquid-phase hydrocarbon medium and catalyst to slury-bed reactor, displacing air, programmed heating, reducing catalyst by H2 and then by CO, and Fischer-Tropsch synthesis.

Description

technical field [0001] The invention belongs to a catalyst reduction method, in particular to a step-by-step reduction method in situ or outside of a Fischer-Tropsch synthesized microspherical large particle industrial iron-based catalyst in a gas-liquid-solid three-phase slurry bed reactor. Background technique [0002] Fischer-Tropsch synthesis refers to the synthesis gas (H 2 +CO) is a reaction process in which the catalyst catalyzes the synthesis of hydrocarbons and by-produces a small amount of organic oxygen-containing compounds. The research on iron-based catalysts has a history of more than 80 years. The catalyst has become a low hydrogen-to-carbon ratio (H 2 / CO molar ratio) coal-based synthesis gas is one of the important catalysts to generate liquid fuels through Fischer-Tropsch synthesis. [0003] The biggest advantage of the slurry bed reactor is that the reactants in the reactor bed are mixed evenly, have good heat transfer performance, the reaction temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J37/16C07C1/04
Inventor 相宏伟郝庆兰白亮李永旺
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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