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Coal liquefaction catalyst and preparation method and application thereof

A catalyst, coal liquefaction technology, applied in physical/chemical process catalysts, chemical instruments and methods, preparation of liquid hydrocarbon mixtures, etc., can solve the limitations of catalyst overall activity and particle size stability, catalyst activity reduction, small specific surface area, etc. problem, to achieve the effect of adjustable carrier particle size range, less usage and good activity

Active Publication Date: 2015-09-23
SHAANXI YANCHANG PETROLEUM GRP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1980s, Japan's NEDOL coal liquefaction process changed from the initial synthetic pyrite to natural pyrite as a catalyst (Hirano K.Fuel processing technology, 2000,62(2):109-118.), the catalyst The average particle size is 0.7 μm, which has high activity, but the particle size requirement is too small. It is difficult to grind natural pyrite to an average particle size of 0.7 μm by mechanical means. If the particle size is increased, the catalytic activity will be improved. decrease accordingly
However, with coal powder as the carrier, its small specific surface area and fragile particle strength lead to the limitation of the overall activity and particle size stability of the catalyst.

Method used

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  • Coal liquefaction catalyst and preparation method and application thereof
  • Coal liquefaction catalyst and preparation method and application thereof

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preparation example Construction

[0027] The preparation method of coal liquefaction catalyst of the present invention comprises the following steps:

[0028] 1) Water configuration ferrous salt solution, wherein ferrous ion Fe 2+ The concentration is: 0.05mol / L~1.5mol / L, add 50~95wt% carrier of the catalyst to be synthesized into the prepared ferrous salt solution and stir evenly to form solution A;

[0029] 2) Pass excessive air or oxygen into the above solution A, add alkali solution and stir evenly, control the pH of the reaction process by adding the content of alkali solution at 5.0-6.9, react for 0.5-4 hours, and the reaction temperature is 20-50 degrees Celsius ; The alkaline solution is a strong base or a weak base containing hydroxide ions;

[0030] 3) After the reaction is completed, the material is discharged, dehydrated and dried to obtain a supported catalyst whose active component is elongated α-FeOOH.

[0031] The present invention proposes the application of the coal liquefaction catalyst: t...

Embodiment 1

[0034] Prepare a ferrous sulfate salt solution with a concentration of 0.2mol / L with water, and add 5.34g of carrier to the salt solution; 3 Oxygen per hour, while gradually adding ammonia solution with a concentration of 1mol / L, controlling its pH at 6.0-7.0, reacting for 1.5 hours, and the reaction temperature is 38 degrees Celsius. Subsequent discharge, suction filtration and drying in a constant temperature drying oven at 100 degrees Celsius, to obtain the catalyst α-FeOOH / carrier of the present invention that is 20wt% with Fe metering load, the XRD of this catalyst is as follows figure 1 As shown, the SEM photos are as figure 2 shown.

Embodiment 2

[0036] Add 0.5 kg of ferrous sulfate heptahydrate to 10 kg of water, and add 2.88 kg of carrier, the flow rate is 2m 3 / h of air, while constantly adding 0.5 kg of 25wt% ammonia. React for 1.5 hours, and the reaction temperature is 25 degrees Celsius. Subsequent discharge, dehydration and drying at 100 degrees to obtain the catalyst α-FeOOH / carrier of the present invention with a Fe metering load of 5wt%, the XRD of the catalyst is as follows figure 1 shown.

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Abstract

The invention provides a coal liquefaction catalyst and a preparation method and application thereof. The catalyst adopts nano alpha-FeOOH as activate components, carbon material particles with large specific surface area serve as carriers, and the loading-type alpha-FeOOH catalyst is synthetized by the coprecipitation method. The specific surface area of the catalyst ranges from 200 to 300m2 / g, and the loading capacity of the alpha-FeOOH ranges from 1wt% to 50wt%. The activity of the catalyst is high, the coal liquefaction performance is fine, the metal impurities of raw materials and coke particles produced by reaction can be absorbed through the large specific surface area, and coking of the wall and internal components of a reactor can be prevented.

Description

technical field [0001] The invention belongs to the technical field of coal liquefaction reaction, and relates to a coal liquefaction catalyst technology, in particular to a coal liquefaction catalyst and its preparation method and application. Background technique [0002] In 2013, China's coal accounted for about 67.59% of the total primary energy consumption, and the total energy consumption control target in 2014 is 3.89 billion tons of standard coal. The development of coal-to-oil or gas-to-oil technology will be an important technology to cope with changes in the future oil supply and demand structure. Among them, coal liquefaction and coal liquefaction technology are the main aspects of coal-to-oil technology and an effective way for clean utilization of coal. [0003] Coal liquefaction technology uses coal and heavy low-quality oil as raw materials, and converts them into usable oil products with a hydrogen-carbon ratio of about 2.0 under high temperature and high p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C10G1/06
Inventor 李大鹏蒋中山李慧慧黄传峰王孟艳霍鹏举
Owner SHAANXI YANCHANG PETROLEUM GRP
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