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Method for preparing fuel oil by waste plastic pyrolytic oil

A technology for pyrolysis of oil and waste plastics, which is only applied in the direction of multi-stage series refining process treatment, etc., can solve the problems of polluting the atmospheric environment and high impurity content, and achieve the effect of low operating cost, low investment and wide application prospects

Inactive Publication Date: 2014-02-19
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing clean fuel oil from waste plastic pyrolysis oil, which is characterized in that the impurities in waste plastic pyrolysis oil are removed, the quality of the oil product has been significantly improved, and the problem of pyrolysis after waste plastic treatment is solved. The impurity content in the oil is high, and the burning of it as a fuel seriously pollutes the atmospheric environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] React 20% sodium hydroxide aqueous solution and waste plastic pyrolysis oil at a mass ratio of 1:2.0 at a temperature of 75°C for 5 hours, cool to 50°C, and separate the stationary oil and water phases. The above-mentioned pyrolysis oil is put into the reactor, and a silica gel adsorbent loaded with phosphotungstic acid is added to the pyrolysis oil. The mass ratio of phosphotungstic acid to silica gel is 0.2:1. After loading phosphotungstic acid, the adsorbent and pyrolysis oil are reacted and adsorbed at 50°C for 1 hour according to the mass ratio of 0.05:1, and then filtered and separated to obtain clean fuel oil. The contents of chlorine, bromine, nitrogen and sulfur in the fuel oil are all less than 6ppm.

Embodiment 2

[0013] React 70% potassium hydroxide aqueous solution and waste plastic pyrolysis oil at a mass ratio of 1:20 at a temperature of 350°C for 0.5h, then cool to 70°C, and the stationary oil and water phases are separated. The above pyrolysis oil is put into the reactor, and SBA-15 adsorbent loaded with phosphomolybdic acid is added to the pyrolysis oil, and the mass ratio of phosphomolybdic acid to SBA-15 is 0.1:1. After loading phosphomolybdic acid, the adsorbent and the pyrolysis oil are reacted and adsorbed at 70°C for 0.5 hours according to the mass ratio of 0.02:1, and then filtered and separated to obtain clean fuel oil. The contents of chlorine, bromine, nitrogen and sulfur in the fuel oil are all less than 3ppm.

Embodiment 3

[0015] React 3% barium hydroxide aqueous solution and waste plastic pyrolysis oil at a mass ratio of 1:10 at 150°C for 10 hours, cool to 70°C, and separate the stationary oil and water phases. The above-mentioned pyrolysis oil is put into the reactor, and MCM-41 adsorbent loaded with silicotungstic acid is added to the pyrolysis oil, and the mass ratio of silicotungstic acid to MCM-41 is 0.5:1. After loading silicotungstic acid, the adsorbent and pyrolysis oil are reacted and adsorbed at 90°C for 5 hours according to the mass ratio of 0.2:1, and then filtered and separated to obtain clean fuel oil. The contents of chlorine, bromine, nitrogen and sulfur in the fuel oil are all less than 8ppm.

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PUM

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Abstract

The invention discloses a method for preparing fuel oil by waste plastic pyrolytic oil. The preparation process of the method is as follows: waste plastic pyrolytic oil and an alkali water solution with a certain concentration are mixed according a certain mass ratio, are heated for 0.5-10 hours at the temperature of 75-350 DEG C, and are cooled to the temperature of 50-70 DEG C; after two-phase still separation of oil and water , silicon-based absorbent loaded with heteropolyacid or ferric chloride is added in the pyrolytic oil for reacting and absorbing for 0.5-5 hours at the temperature of 50-90 DEG C; and then the filtration and the separation are implemented to obtain clean fuel oil. The method removes impurities in the waste plastic pyrolytic oil, so that the oil product quality is obviously modified, the problems of high content of impurities in the pyrolytic oil after treating waste plastics and severe pollution of atmospheric environment when burning as fuel are solved, prominent economic and social benefits can be generated, and wide application foreground is achieved. The method has the characteristics of low investment and low operation cost, and can be applied to the field of modification treatment of other organic solid waste pyrolytic oil.

Description

Technical field: [0001] The invention relates to a method for preparing clean fuel oil by pyrolyzing oil from waste plastics, which relates to the fields of solid waste treatment and utilization and energy. technical background: [0002] At present, the annual output of solid waste in my country has reached 250 million tons, of which plastic waste accounts for about 8-9%, and polyolefin plastics suitable for pyrolysis to prepare liquid fuels account for about 78% of the total plastic waste. However, the treatment methods of waste plastics in my country are mainly landfill and incineration. There are still many problems in these two treatment methods. Plastic waste is light and bulky. Absorb nutrients to reduce production; toxic additives and polyvinyl chloride in plastic waste will also be enriched in vegetables, grain and animals; CO, vinyl chloride monomer (VCM), HCL emitted from plastic waste during combustion , methane, NOx, SO 2 , Alkanes, olefins, aromatics, oily sludg...

Claims

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Application Information

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IPC IPC(8): C10G53/12
Inventor 王胜强严黎张馨予王庆武祝民于宏兵
Owner NANKAI UNIV