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Catalyst utilized to prepare hydrocarbon from synthesis gas and its preparation method

A catalyst and synthesis gas technology, applied in the recovery of liquid hydrocarbon mixture, petroleum industry, etc., can solve the problems of easy wear and short service life of the catalyst

Inactive Publication Date: 2003-10-08
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] But the catalysts disclosed in the above-mentioned patents all have obvious deficiencies, that is, the service life is relatively short, and the catalysts are extremely easy to wear when used in fluidized bed and slurry bed reactors. The present invention adopts K 2 O, CaO, Al 2 o 3 , MgO, etc. as additives, can be used for multiple reductions, prolonging the service life of the catalyst, and the anti-wear performance is also better

Method used

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  • Catalyst utilized to prepare hydrocarbon from synthesis gas and its preparation method

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Embodiment 1

[0021] 98 kg of natural magnetite was magnetically separated to remove excess SiO 2 (retention 2 , S, P, etc., add 2 kg of Al 2 o 3 , 1 kg KNO 3 , 1 kg of CaCO 3 , mixed evenly, heated to 1500°C to melt, generally, preferably stable for 8 hours, rapidly cooling the molten liquid, and crushing to obtain the catalyst of the present invention.

Embodiment 2

[0023] (1) is CO cylinder, (2) is H 2 Steel cylinders, after pressure measurement and mass flow meter measurement at room temperature, adjust the valve to open to make H 2 : CO = 2: 1 (mole), the space velocity based on the catalyst is 2000h -1 , the pressure is 2.0MPa into the tubular fixed-bed reactor (6). The inner diameter of the tubular fixed-bed reactor (6) is 25.4mm, and a φ8×1.5 thermocouple tube (11) is arranged in the center, the lower part is a stainless steel support body (10), and the upper part is a flower plate and a stainless steel wire mesh (15). Fill 60 mesh, 80 mesh, 120 mesh, 180 mesh, 240 mesh quartz sand (9) successively above the screen, mix and fill in (8) according to quartz sand (240 mesh): catalyst=50 grams: 10 grams, its top Refill 240 orders, 180 orders, 120 orders, 80 orders, 60 orders quartz sand (7). The tubular fixed bed reactor (6) is placed in the electric furnace (16). Adjust the amount of current passing through the electric furnace (16...

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Abstract

A catalyst for preparing hydrocarbons from synthetic gas by Fischer-Tropsch reaction contains Fe3O4 (95-98 wt%), Al2O3 (1-2.5 wt.%), K2O (0.5-1.0 wt.%), CaO (0.5-1.5 wt.%) and SiO2 (0-0.5 wt.%). Its preparing steps include magnetic separation of excessive SiO2 from natural magnetite, proportionally mixing with others, heating to smelting, quick cooling, and crushing. Its advantages are high output rate of hydrocarbons and high activity.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for preparing hydrocarbons through Fischer-Tropsch reaction using syngas as raw material. Background technique [0002] The said syngas refers to H 2 , CO as the main gas, does not contain substances that poison the catalyst, such as oxygen, sulfur, carbon dioxide, water, chlorine, arsenic, phosphorus, etc., and can be prepared from coal, natural gas, petroleum, etc. through various processes. [0003] The so-called Fischer-Tropsch reaction was discovered by Fisher F., Tropsch H. in 1923, they used H 2 , CO as raw material, under the action of iron-based catalysts to produce hydrocarbons. [0004] Since then, people have conducted extensive research on catalysts, and it is generally believed that Fe, Co, Ni, and Ru are the active components of the Fischer-Tropsch reaction, while K 2 O, CaO, Al 2 o 3 , MgO has the effect of co-catalyst, and the preparation method of catalyst has forme...

Claims

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Application Information

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IPC IPC(8): C10G5/00
Inventor 于遵宏王辅臣代正华刘海峰王亦飞龚欣周志杰于广锁
Owner EAST CHINA UNIV OF SCI & TECH
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