Fuels by pyrolysis of waste plastics from agricultural and packaging sectors in a pilot scale reactor

N. Miskolczi, A. Angyal, L. Bartha, I. Valkai

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

The pyrolysis of waste plastics (so called chemical recycling) is one perspective way of their utilizations, but the end product properties are a key point of the industrial leading of processes. In this paper a pilot scale pyrolysis process has been investigated. Waste plastics were decomposed in a tube reactor at 520 °C, using hourly feed rate of 9.0 kg. Raw materials were selectively collected wastes from agricultural and packaging industry. For supporting the more intensive cracking of C{single bond}C bonds of main polymer structure a commercial ZSM-5 catalyst was tested in concentration of 5.0%. Products were separated into gases, gasoline, light and heavy oil by distillation. Plastic wastes could be converted into gasoline and light oil with yields of 20-48% and 17-36% depending on the used parameters. The gas and liquid products had significant content of unsaturated hydrocarbons, principally olefins. In the presence of ZSM-5 catalyst the yields of lighter fractions (especially gasoline) could be considerably increased and the average molecular weight of each fraction has decreased. Gasoline had C5-C15 hydrocarbons, while light oil had C12-C28. The used catalyst has promoted the formation of i-butane in gases and affected the composition of both gasoline and light oil. Properties of products are advantageous for fuel-like applications, and they are able to increase the productivity of refinery. On the other hand the possibility for further utilization of products from pyrolysis basically was affected by the source and the properties of raw materials. Waste polyethylene from agricultural consisted of some elements from fertilizers (N, S, P and Ca), which could not be removed from the surfaces of raw materials by pre-treatment (e.g. washing). In that case significant concentration of N, S, P and Ca can be measured in all products, but the catalyst has decreased the concentration of impurities. Gasoline, light oil and heavy oil were nitrogen free and sulphur content was below 12 mg/kg in hydrocarbons obtained by the pyrolysis of polypropylene waste from packaging.

Original languageEnglish
Pages (from-to)1032-1040
Number of pages9
JournalFuel Processing Technology
Volume90
Issue number7-8
DOIs
Publication statusPublished - Jul 2009

Fingerprint

Gasoline
Packaging
Pyrolysis
Plastics
Oils
Hydrocarbons
Raw materials
Catalysts
Gases
Crude oil
Polypropylenes
Fertilizers
Butane
Alkenes
Polyethylene
Sulfur
Washing
Chemical elements
Distillation
Olefins

Keywords

  • Cetane number
  • GC
  • Octane number
  • Product utilization
  • Pyrolysis
  • Waste polymers

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Chemical Engineering(all)

Cite this

Fuels by pyrolysis of waste plastics from agricultural and packaging sectors in a pilot scale reactor. / Miskolczi, N.; Angyal, A.; Bartha, L.; Valkai, I.

In: Fuel Processing Technology, Vol. 90, No. 7-8, 07.2009, p. 1032-1040.

Research output: Contribution to journalArticle

@article{591274eedaf24aff893edbdbc338b05e,
title = "Fuels by pyrolysis of waste plastics from agricultural and packaging sectors in a pilot scale reactor",
abstract = "The pyrolysis of waste plastics (so called chemical recycling) is one perspective way of their utilizations, but the end product properties are a key point of the industrial leading of processes. In this paper a pilot scale pyrolysis process has been investigated. Waste plastics were decomposed in a tube reactor at 520 °C, using hourly feed rate of 9.0 kg. Raw materials were selectively collected wastes from agricultural and packaging industry. For supporting the more intensive cracking of C{single bond}C bonds of main polymer structure a commercial ZSM-5 catalyst was tested in concentration of 5.0{\%}. Products were separated into gases, gasoline, light and heavy oil by distillation. Plastic wastes could be converted into gasoline and light oil with yields of 20-48{\%} and 17-36{\%} depending on the used parameters. The gas and liquid products had significant content of unsaturated hydrocarbons, principally olefins. In the presence of ZSM-5 catalyst the yields of lighter fractions (especially gasoline) could be considerably increased and the average molecular weight of each fraction has decreased. Gasoline had C5-C15 hydrocarbons, while light oil had C12-C28. The used catalyst has promoted the formation of i-butane in gases and affected the composition of both gasoline and light oil. Properties of products are advantageous for fuel-like applications, and they are able to increase the productivity of refinery. On the other hand the possibility for further utilization of products from pyrolysis basically was affected by the source and the properties of raw materials. Waste polyethylene from agricultural consisted of some elements from fertilizers (N, S, P and Ca), which could not be removed from the surfaces of raw materials by pre-treatment (e.g. washing). In that case significant concentration of N, S, P and Ca can be measured in all products, but the catalyst has decreased the concentration of impurities. Gasoline, light oil and heavy oil were nitrogen free and sulphur content was below 12 mg/kg in hydrocarbons obtained by the pyrolysis of polypropylene waste from packaging.",
keywords = "Cetane number, GC, Octane number, Product utilization, Pyrolysis, Waste polymers",
author = "N. Miskolczi and A. Angyal and L. Bartha and I. Valkai",
year = "2009",
month = "7",
doi = "10.1016/j.fuproc.2009.04.019",
language = "English",
volume = "90",
pages = "1032--1040",
journal = "Fuel Processing Technology",
issn = "0378-3820",
publisher = "Elsevier",
number = "7-8",

}

TY - JOUR

T1 - Fuels by pyrolysis of waste plastics from agricultural and packaging sectors in a pilot scale reactor

AU - Miskolczi, N.

AU - Angyal, A.

AU - Bartha, L.

AU - Valkai, I.

PY - 2009/7

Y1 - 2009/7

N2 - The pyrolysis of waste plastics (so called chemical recycling) is one perspective way of their utilizations, but the end product properties are a key point of the industrial leading of processes. In this paper a pilot scale pyrolysis process has been investigated. Waste plastics were decomposed in a tube reactor at 520 °C, using hourly feed rate of 9.0 kg. Raw materials were selectively collected wastes from agricultural and packaging industry. For supporting the more intensive cracking of C{single bond}C bonds of main polymer structure a commercial ZSM-5 catalyst was tested in concentration of 5.0%. Products were separated into gases, gasoline, light and heavy oil by distillation. Plastic wastes could be converted into gasoline and light oil with yields of 20-48% and 17-36% depending on the used parameters. The gas and liquid products had significant content of unsaturated hydrocarbons, principally olefins. In the presence of ZSM-5 catalyst the yields of lighter fractions (especially gasoline) could be considerably increased and the average molecular weight of each fraction has decreased. Gasoline had C5-C15 hydrocarbons, while light oil had C12-C28. The used catalyst has promoted the formation of i-butane in gases and affected the composition of both gasoline and light oil. Properties of products are advantageous for fuel-like applications, and they are able to increase the productivity of refinery. On the other hand the possibility for further utilization of products from pyrolysis basically was affected by the source and the properties of raw materials. Waste polyethylene from agricultural consisted of some elements from fertilizers (N, S, P and Ca), which could not be removed from the surfaces of raw materials by pre-treatment (e.g. washing). In that case significant concentration of N, S, P and Ca can be measured in all products, but the catalyst has decreased the concentration of impurities. Gasoline, light oil and heavy oil were nitrogen free and sulphur content was below 12 mg/kg in hydrocarbons obtained by the pyrolysis of polypropylene waste from packaging.

AB - The pyrolysis of waste plastics (so called chemical recycling) is one perspective way of their utilizations, but the end product properties are a key point of the industrial leading of processes. In this paper a pilot scale pyrolysis process has been investigated. Waste plastics were decomposed in a tube reactor at 520 °C, using hourly feed rate of 9.0 kg. Raw materials were selectively collected wastes from agricultural and packaging industry. For supporting the more intensive cracking of C{single bond}C bonds of main polymer structure a commercial ZSM-5 catalyst was tested in concentration of 5.0%. Products were separated into gases, gasoline, light and heavy oil by distillation. Plastic wastes could be converted into gasoline and light oil with yields of 20-48% and 17-36% depending on the used parameters. The gas and liquid products had significant content of unsaturated hydrocarbons, principally olefins. In the presence of ZSM-5 catalyst the yields of lighter fractions (especially gasoline) could be considerably increased and the average molecular weight of each fraction has decreased. Gasoline had C5-C15 hydrocarbons, while light oil had C12-C28. The used catalyst has promoted the formation of i-butane in gases and affected the composition of both gasoline and light oil. Properties of products are advantageous for fuel-like applications, and they are able to increase the productivity of refinery. On the other hand the possibility for further utilization of products from pyrolysis basically was affected by the source and the properties of raw materials. Waste polyethylene from agricultural consisted of some elements from fertilizers (N, S, P and Ca), which could not be removed from the surfaces of raw materials by pre-treatment (e.g. washing). In that case significant concentration of N, S, P and Ca can be measured in all products, but the catalyst has decreased the concentration of impurities. Gasoline, light oil and heavy oil were nitrogen free and sulphur content was below 12 mg/kg in hydrocarbons obtained by the pyrolysis of polypropylene waste from packaging.

KW - Cetane number

KW - GC

KW - Octane number

KW - Product utilization

KW - Pyrolysis

KW - Waste polymers

UR - http://www.scopus.com/inward/record.url?scp=67149099406&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67149099406&partnerID=8YFLogxK

U2 - 10.1016/j.fuproc.2009.04.019

DO - 10.1016/j.fuproc.2009.04.019

M3 - Article

VL - 90

SP - 1032

EP - 1040

JO - Fuel Processing Technology

JF - Fuel Processing Technology

SN - 0378-3820

IS - 7-8

ER -