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Method for performing catalytic pyrolysis on high temperature coke-oven coal tar by utilizing Fe scrap

A high-temperature coal tar and catalytic thermal cracking technology, which is applied in tar processing by heat treatment and tar refining by chemical method, etc., can solve the problems of short service life of catalyst, easy coking of catalyst, and difficulty in industrialization, etc. Good application prospects, easy to achieve results

Inactive Publication Date: 2018-05-25
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since asphalt accounts for more than 50% of the high-temperature coal tar, the catalyst is easy to coke, resulting in a short service life of the expensive catalyst, and the hydrogen consumption of the hydrogenation process is large, which makes the industrialization of the process difficult and economical.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: take by weighing 2g of waste iron chip catalyst (50~100% iron-containing, from Maanshan Iron and Steel Co., Ltd.) and place in the fixed-bed reactor, then the catalytic cracking reactor temperature is raised to 600°C under an inert atmosphere At this temperature, 0.2 g of coal tar is continuously added, and the coal tar is catalytically pyrolyzed in a nitrogen atmosphere of 100 ml / min. The tar condensed from the catalytic pyrolysis of coal tar is collected through a constant temperature cooling tank. The collected modified tar was analyzed, and 78% was light tar, of which 14% were fatty compounds, 65% were aromatic compounds, and 21% were phenolic compounds. .

Embodiment 2

[0014] Embodiment 2: take by weighing 2g of waste iron chip catalyst (50~100% iron-containing, from Maanshan Iron and Steel Co., Ltd.) and place in the fixed bed reactor, then the catalytic cracking reactor temperature is raised to 550°C under an inert atmosphere At this temperature, 0.2 g of coal tar is continuously added, and the coal tar is catalytically pyrolyzed in a nitrogen atmosphere of 100 ml / min. The tar condensed from the catalytic pyrolysis of coal tar is collected through a constant temperature cooling tank. The collected modified tar was analyzed, and 76% was light tar, of which 13% were fatty compounds, 61% were aromatic compounds, and 26% were phenolic compounds. .

Embodiment 3

[0015] Embodiment 3: take by weighing 2g waste iron scrap catalyst (50~100% iron-containing, from Maanshan Iron and Steel Co., Ltd.) and place in the fixed-bed reactor, then the catalytic cracking reactor temperature is raised to 750 ℃ ​​under inert atmosphere At this temperature, 0.2 g of coal tar is continuously added, and the coal tar is catalytically pyrolyzed in a nitrogen atmosphere of 100 ml / min. The tar condensed from the catalytic pyrolysis of coal tar is collected through a constant temperature cooling tank. The collected modified tar was analyzed, and 70% was light tar, of which 17% were fatty compounds, 63% were aromatic compounds, and 20% were phenolic compounds.

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Abstract

The invention discloses a method for performing catalytic pyrolysis on high temperature coke-oven coal tar by utilizing Fe scrap and belongs to the technical field of coal tar processing. The method specifically comprises the following steps: selecting the Fe scraps capable of performing efficient pyrolysis on the high temperature coke-oven coal tar as a catalyst, and converting the high temperature coke-oven coal tar into light tar under the conditions of a pyrolysis temperature of 500-800 DEG C, a tar to catalyst mass ratio of 0.1-10 to 1, and an inert gas velocity of 50-200ml / min. Accordingto the method disclosed by the invention, the high temperature coke-oven coal tar is subjected to efficient catalytic pyrolysis by utilizing a cheap catalyst, a new thought is provided for high value-added utilization of the high temperature coke-oven coal tar, and the method has dual economic and environmental benefits. Moreover, the catalytic pyrolysis process disclosed by the invention is simple in operation and easy to realize. Therefore, the method has excellent application prospects.

Description

technical field [0001] The invention belongs to the technical field of coal tar processing, and in particular relates to a high-efficiency catalytic thermal cracking method for high-temperature coal tar with a cheap catalyst, so as to increase the added value of high-temperature coal tar. Background technique [0002] As the main by-product of coking, high-temperature coal tar accounts for about 3%-4% of the mass of coking coal. According to incomplete statistics, the current total production capacity of high-temperature coal tar in my country is about 22 million tons. High-temperature coal tar is mainly composed of aromatic hydrocarbons, and its composition exceeds 10,000. Most coal coking products are difficult to replace, and their content in coal tar is relatively small. It can be seen that it is of great significance to carry out deep processing of coal tar. However, in the current coal tar separation and refining process, pitch accounts for more than 50% of coal tar,...

Claims

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Application Information

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IPC IPC(8): C10C1/19C10C1/20
CPCC10C1/19C10C1/20
Inventor 雷智平于文号康士刚任世彪王知彩水恒福
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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