Method for increasing tar yield in hydropyrolysis of coal by using ferric ammonium salt

A technology of tar yield and iron ammonium salt, which is applied in the field of coal hydropyrolysis, can solve the problems of complex process, harsh reaction conditions, expensive catalyst and the like, and achieves the effect of simple and easy process and improved tar yield.

Inactive Publication Date: 2012-10-31
XINJIANG UNIVERSITY
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Problems solved by technology

[0009] The present invention provides a method for improving the tar yield in coal hydropyrolysis with iron ammonium salt, which overcomes the deficiencies of the above-mentioned prior

Method used

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  • Method for increasing tar yield in hydropyrolysis of coal by using ferric ammonium salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, this iron ammonium salt improves the method for tar yield in coal hydropyrolysis, carries out according to the following steps:

[0026] The first step is to add catalyst by impregnation method:

[0027] (1) Tiechanggou coal, iron ammonium salt (calculated as iron) and distilled water are mixed uniformly in a mass ratio of 100:1:150 to 100:7:300, and the temperature is kept at a constant temperature of 30°C to 80°C. From 8h to 16h, mechanical stirring was added at the same time at a constant temperature, and the stirring rate was 100 r / min to 300 r / min; 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O;

[0028] (2) Vacuum drying is carried out after immersion, and coal samples are obtained after vacuum drying. The temperature of vacuum drying is 60℃ to 120℃, the vacuum degree is 0.02MPa to 0.08MPa, and the drying time is 12h to 36h;

[0029] (3) Transfer the coal sample obtained after drying to a desiccator for storage;

[0030] The second step, coal hydropyrolysis reacti...

Embodiment 2

[0035] Embodiment 2, the difference with embodiment 1 is that the iron ammonium salt catalyst adopts NH 4 Fe(SO 4 ) 2 ·12H 2O, the resulting tar yields ranged from 14.8 wt % daf to 17.4 wt % daf, with an average of 16.2 wt % daf.

Embodiment 3

[0036] Example 3 is different from Example 1 in that Nantaizi coal is used as the coal, and the obtained tar yield is 15.6 wt% daf to 21.2 wt% daf, and the average tar yield is 18.2 wt% daf.

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Abstract

The invention relates to the technical field of hydropyrolysis of coal, in particular to a method for increasing tar yield in hydropyrolysis of coal by using a ferric ammonium salt. The method is carried out according to the following steps of: (1) adding a catalyst by an immersion method: (1) uniformly mixing coal, a ferric ammonium salt catalyst (in term of ferrum) and distilled water according to a mass ratio of 100:1:150-100:7:300; keeping a mixture at a constant temperature of 30-80 DEG C for 8-16 h; and mechanically stirring the mixture at a stirring speed of 100-300 r/min during keeping the mixture at the constant temperature; the method for increasing the tar yield in the hydropyrolysis of the coal by using the ferric ammonium salt, provided by the invention, has the advantage of simple and easy process; the cheap ferric ammonium salt catalyst is adopted as the catalyst in the hydropyrolysis of the coal; and as the ferric ammonium salt is adopted as the catalyst in the hydropyrolysis of the coal in the process, the tar yield of the method can be greatly increased when compared with the hydropyrolysis of the coal, in which the catalyst is not added.

Description

technical field [0001] The invention relates to the technical field of coal hydropyrolysis, and relates to a method for improving the yield of tar in coal hydropyrolysis with iron ammonium salt. Background technique [0002] Coal pyrolysis process is a method of extracting hydrogen-rich components in coal through pyrolysis under relatively mild conditions to make chemical raw materials or high-quality liquids, so as to improve coal utilization efficiency. However, the amount of tar obtained from traditional coal pyrolysis is small, and the content of heavy components in the tar is high. In order to improve the yield and quality of tar, a third route between gasification and liquefaction—coal hydropyrolysis was proposed. The principle of this process is to saturate the free radicals produced by coal pyrolysis by adding hydrogen, avoiding the secondary reaction of mutual polymerization between free radicals, and combining free radicals with hydrogen to form light tar. Cataly...

Claims

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Application Information

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IPC IPC(8): C10G1/06
Inventor 周岐雄牛犇
Owner XINJIANG UNIVERSITY
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