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A kind of method for fixing pollutant organophosphate in co-pyrolysis process

An organic phosphate and pollutant technology, applied in the field of co-pyrolysis of solid waste, can solve environmental and human health hazards and other problems, and achieve the effect of reducing risks, not easy to pollute phosphorus, and simple and easy to operate

Inactive Publication Date: 2016-03-02
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the products of organophosphates in the feed (or unreacted organophosphates) are distributed to non-condensable gases and bio-oils, they will be easily discharged into the environment during use, which is harmful to the environment and humans health hazard

Method used

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  • A kind of method for fixing pollutant organophosphate in co-pyrolysis process
  • A kind of method for fixing pollutant organophosphate in co-pyrolysis process
  • A kind of method for fixing pollutant organophosphate in co-pyrolysis process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In order to facilitate the analysis and research of later products, this embodiment directly uses lignin and tri(butoxyethyl) phosphate (TBEP) as feedstock, instead of organic phosphate in biomass and plastics, to exclude other factors. Influence, Accurate Study of the Fixation of Organophosphates on Pyrolyzed Biochar.

[0031] The specific process is as follows:

[0032] a, the preparation contains 34.3g / LCaCl 2 , 62.9g / LMgCl 2 ·6H 2 O ethanol solution;

[0033] b. Mix lignin and tri(butoxyethyl)phosphate (TBEP) according to the ratio of lignin mass: phosphorus element mass in TBEP=59:1 to obtain a mixture, pulverize the mixture, and pass through a 100-mesh sieve to obtain a sample A;

[0034] c. Spray the mixed solution evenly on the sample A obtained in step b, and then dry it at 80°C to obtain the feed; the mass ratio of the mixed solution to sample A is 4:5; the phosphorus content in the feed is measured (calculated as phosphorus element) is about 2wt%;

[0...

Embodiment 2

[0038] In this example, the same method as in Example 1 is used to explore the method of fixing pollutant organophosphates in the process of co-pyrolysis, the difference is that the pyrolysis temperature in step d is 500°C, and the obtained biochar is ground and passed through a 100-mesh sieve, and named It is biochar sample A2. Biochar yield was 50.9%

Embodiment 3

[0040] In this example, the same method as in Example 1 is used to explore the method of fixing pollutant organophosphates in the process of co-pyrolysis, the difference is that the pyrolysis temperature in step d is 600°C, and the obtained biochar is ground and passed through a 100-mesh sieve, and named It is biochar sample A3. Biochar yield was 46.2%

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Abstract

The invention discloses a method for immobilizing organophosphorus ester of pollutants during co-pyrolysis. The method is characterized in that a mixed solution of CaCl2 and MgCl2.6H2O is sprayed onto a mixture of lignin-containing biomass and plastics, the mixture is dried to be used as a feeding material, and then the material is subjected to pyrolysis at 400-600 DEG C. According to the method, free radicals generated by pyrolysis of lignin in biomass react with thermal decomposition products of organophosphorus ester, so that organophosphorus ester is immobilized in charcoal in a plastic and biomass co-pyrolysis process through pyrolysis temperature control; more organophosphorus ester can be immobilized in charcoal under the strengthening effect of CaCl2 and MgCl2.6H2O, the risk that phosphorus containing pollutants are released in the environment is reduced, and environment pollution is avoided; the operating method is simple and easy to implement, and the method provided by the invention can be applied to organophosphorus ester containing waste plastic treatment.

Description

technical field [0001] The invention belongs to the technical field of solid waste co-pyrolysis. Background technique [0002] Co-pyrolysis of plastics and biomass is a promising solid waste treatment technology, because this technology can not only effectively reduce the total amount of waste plastics and waste biomass, but also convert solid waste into some high-addition valuable chemicals. Since the plastic contains a relatively high proportion of hydrogen, the plastic can supply hydrogen to the biomass during the co-pyrolysis process, reduce the oxygen content in the oil, and improve the calorific value and quality of the oil. Plastics contain an important additive, organophosphates (OPEs), which are a class of commonly used phosphorus-containing organic compounds. More and more studies have shown that such compounds will be released into the air, water and other environments, and may cause potential harm to human health. [0003] The products of co-pyrolysis can be d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 江鸿钱婷婷
Owner UNIV OF SCI & TECH OF CHINA
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