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Iron-based catalyst as well as preparation method and application thereof

A catalyst and iron-based technology, applied in the field of coal chemical industry, can solve problems such as unsuitable for large-scale development and application, large water consumption, and long process flow, so as to improve the catalytic activity of direct coal liquefaction, avoid continuous production interruption, and shorten the process flow Effect

Active Publication Date: 2018-12-11
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The main purpose of the present invention is to provide an iron-based catalyst, its preparation method and application, so as to solve the problem that the preparation method of the iron-based catalyst in the prior art consumes a lot of water, the process flow is long and complicated, the energy consumption is high, and the cost is high. Problems suitable for large-scale development and application

Method used

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  • Iron-based catalyst as well as preparation method and application thereof
  • Iron-based catalyst as well as preparation method and application thereof

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preparation example Construction

[0032] As described in the background technology section, the existing preparation methods of iron-based catalysts cannot effectively solve the problems of large water consumption, long and complicated process flow, high energy consumption and high cost, and are not suitable for large-scale development and application. In order to solve the above problems, the present invention provides a method for preparing an iron-based catalyst, the preparation method comprising: 1) mixing and reacting an iron-containing soluble salt solution with an alkaline aqueous solution to obtain a slurry initial product; Under the atmosphere, the primary product is loaded on the solid carrier in the form of spraying, and the crystal phase transformation is carried out to obtain the secondary product with FeOOH loaded on the surface of the solid carrier; and 3) under the nitrogen atmosphere, the secondary product is dried to obtain Fe system catalyst.

[0033] The preparation method of the iron-based...

Embodiment 1

[0051] Slowly drip the ammonia solution with a concentration of 25wt% into 900g of ferrous sulfate solution with a concentration of 25wt%, stir rapidly, stop dripping when the pH value reaches 7.5, and slowly stir the formed slurry for use. Weigh 2000g of dry coal powder ground to a particle size of less than 150μm and place it in a stirred reactor with a volume of 8L, turn on the reactor to stir and heat with heat transfer oil. When the pulverized coal temperature rises to 80°C, 2L / min of air is introduced, and at the same time, the above-mentioned prepared slurry is transported to the nozzle on the upper part of the reactor through the plunger diaphragm pump for atomization, and the atomization pressure is adjusted to control the droplet diameter at Within 300μm, the mist is sprayed onto the surface of the stirred coal powder. After spraying, switch to nitrogen, increase the heating temperature of the reactor to raise the temperature of the coal powder to 180°C, keep it for ...

Embodiment 2

[0053] Prepare 900g of ferrous sulfate solution with a concentration of 25wt%, prepare 200g of ammonia solution with a concentration of 25wt%, pump the two solutions into a 2L beaker in parallel through a peristaltic pump to react, stir quickly, and control the pH of the reaction to 7.5 ±0.1, when the ferrous sulfate solution is completely fed, the feeding reaction is stopped, and the formed slurry is slowly stirred for use. Subsequent steps are the same as in Example 1. Labeled as Example 2# catalyst.

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Abstract

The invention provides an iron-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) enabling iron-containing soluble salt solution to be mixed with alkaline aqueous solution and reacting, to obtain a slurry-state head product; 2) in an aerobic atmosphere, enabling the head product to be loaded on a solid carrier in a spraymode, performing crystal phase transition, to obtain a secondary product loaded with FeOOH on the surface of the solid carrier; and 3) in a nitrogen atmosphere, drying the secondary product, to obtain the iron-based catalyst. The provided preparation method for the iron-based catalyst is short in technological process, low in production cost, low in water consumption, and wastewater-free. The catalyst prepared by the preparation method is high in direct coal liquefaction catalytic activity.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to an iron-based catalyst, its preparation method and application. Background technique [0002] my country is relatively rich in coal resources, but relatively short in oil and natural gas resources. Coal direct liquefaction is a clean coal technology that converts coal into liquid products with the help of hydrogen-donating solvents and catalysts under high temperature and high pressure conditions. The main products of this process are high-quality gasoline, jet fuel oil, diesel oil, aromatics and carbon chemical raw materials, and by-products such as fuel gas, liquefied petroleum gas, sulfur and ammonia, etc. The thermal efficiency of the process is as high as 70%. Therefore, direct coal liquefaction to produce liquid fuel is an important way for clean coal conversion and high-efficiency utilization, and an effective technical means to balance resources in areas rich in coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C10G1/06
CPCB01J23/745C10G1/06
Inventor 谢晶舒歌平章序文杨葛灵王洪学高山松
Owner CHNA ENERGY INVESTMENT CORP LTD
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