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Method for catalytic pyrolysis of high temperature coal tar with iron oxide scale and magnetite

A high-temperature coal tar, catalytic pyrolysis technology, applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems of short service life of catalyst, easy coking of catalyst, difficulty of industrialization, etc., achieve high activity, good application prospect, easy Achieved effect

Inactive Publication Date: 2018-05-29
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

[0014] Embodiment 1: Weigh 1g of iron oxide scale (containing 30-100% of ferrous oxide, from Maanshan Iron and Steel Co., Ltd.) and 1g of magnetite (containing 70-100% of ferric oxide, from Maanshan Iron and Steel Co., Ltd.) Mix it as a catalyst and put it in a fixed-bed reactor, then raise the temperature of the catalytic cracking reactor to 600°C under an inert atmosphere, and continuously add 0.2g of coal tar at this temperature, and the coal tar is catalytically heated in a nitrogen atmosphere of 100ml / min. untie. 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 77% was light tar, of which 12% were fatty compounds, 61% were aromatic compounds, and 27% were phenolic compounds.

Embodiment 2

[0015] Embodiment 2: Weigh 1.2g of iron oxide scale (30-100% containing ferrous oxide, from Maanshan Iron and Steel Co., Ltd.) and 0.8g magnetite (containing 70-100% ferric oxide, from Maanshan Iron and Steel Co., Ltd. Company) mixed as a catalyst and placed in a fixed-bed reactor, then the temperature of the catalytic cracking reactor was raised to 550°C under an inert atmosphere, and 0.2g of coal tar was continuously added at this temperature, and the coal tar was carried out in a nitrogen atmosphere of 100ml / min Catalytic pyrolysis. 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 72% was light tar, of which 8% were fatty compounds, 63% were aromatic compounds, and 29% were phenolic compounds.

Embodiment 3

[0016] Embodiment 3: Weigh 1g of iron oxide scale (30-100% containing ferrous oxide, from Maanshan Iron and Steel Co., Ltd.) and 1g magnetite (containing 70-100% ferric oxide, from Maanshan Iron and Steel Co., Ltd.) Mix it as a catalyst and put it in a fixed-bed reactor, then raise the temperature of the catalytic cracking reactor to 750°C under an inert atmosphere, add 0.2g of coal tar at this temperature, and carry out catalytic pyrolysis of the coal tar in a nitrogen atmosphere of 100ml / 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 15% were fatty compounds, 65% were aromatic compounds, and 20% were phenolic compounds.

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Abstract

The invention discloses a method for catalytic pyrolysis of high temperature coal tar with iron oxide scale and magnetite, and belongs to the technical field of coal tar processing. The method comprises the steps: industrial waste residue iron oxide scale and iron ore magnetite which are capable of high-efficiency pyrolysis of the high temperature coal tar are selected as catalysts, and under conditions of the pyrolysis temperature of 500-800 DEG C, the mass ratio of tar to the catalyst of (0.1-10):1 and the inert gas flow velocity of 50-200 ml / min, the high temperature coal tar is converted into light tar. By use of the cheap industrial waste residue and magnetite as the catalysts, the high temperature coal tar is subjected to high-efficiency catalytic pyrolysis, and a new idea is provided for high added value utilization of the high temperature coal tar and re-utilization of the industrial waste residue; the catalytic pyrolysis process is simple to operate and easy to realize, and thus the method has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of coal tar processing, and in particular relates to a high-efficiency catalytic pyrolysis of high-temperature coal tar by using cheap industrial waste slag and iron ore as catalysts, thereby increasing 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...

Claims

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Application Information

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IPC IPC(8): C10G11/04
CPCC10G11/04C10G2300/1037
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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