Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis

Thesis (M.Sc.)--Memorial University of Newfoundland, 2000. Chemistry Bibliography: leaves 100-106 In the search for a commercially efficient technology for solving the problem of scrap tires, pyrolysis is accepted as an environmentally and economically attractive recycling method to recover useful p...

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Main Author: Popovic, Nevena, 1952-
Other Authors: Memorial University of Newfoundland. Dept. of Chemistry
Format: Thesis
Language:English
Published: 2000
Subjects:
Online Access:http://collections.mun.ca/cdm/ref/collection/theses3/id/81869
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spelling ftmemorialunivdc:oai:collections.mun.ca:theses3/81869 2023-05-15T17:23:32+02:00 Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis Popovic, Nevena, 1952- Memorial University of Newfoundland. Dept. of Chemistry 2000 xii, 106 leaves Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses3/id/81869 eng eng Electronic Theses and Dissertations (25.89 MB) -- http://collections.mun.ca/PDFs/theses/Popovic_Nevena.pdf a1477375 http://collections.mun.ca/cdm/ref/collection/theses3/id/81869 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Waste tires--Recycling Pyrolysis Char--Analysis Text Electronic thesis or dissertation 2000 ftmemorialunivdc 2015-08-06T19:18:42Z Thesis (M.Sc.)--Memorial University of Newfoundland, 2000. Chemistry Bibliography: leaves 100-106 In the search for a commercially efficient technology for solving the problem of scrap tires, pyrolysis is accepted as an environmentally and economically attractive recycling method to recover useful products from scrap tire waste. Ireton International Waste Management is commercially developing an ultra fast pyrolysis technology called the Continuous Ablative Reactor (CAR) which can heat solid particles to a high temperature (500-600 °C) in under one second. The pyrolytic char obtained in this ultra fast pyrolysis process has been characterized and efforts were made to upgrade the product. EnerVision Inc. (Halifax) provided samples from their pilot unit. Initial investigations were focused on the char in its original form. The char contained inorganic compounds present in tires, along with the original carbon black and a substantial amount of condensed organic by-products formed during the pyrolysis process. The contaminants in the char were reflected in an oily appearance, specific odour and high ash content These contaminants can be eliminated, or significantly reduced. The economic feasibility of the process depends on the char quality and its usefulness in high value commercial applications. -- High temperature heat treatments (600-900 °C) and oxidation processes using various agents (i.e., air, H202, HN03) present an opportunity to elevate the char quality and improve its commercial value. In this study, it was demonstrated that the production of highly activated char is possible by activation using steam or carbon dioxide. The adsorption properties of the activated char so obtained were found to be comparable to those of the commercial active carbons. Hence, ultra fast pyrolysis may provide a recycling alternative for waste tires and for the production of new adsorbents from low-cost waste material. -- Analytical techniques used in characterizing the chars and activated chars (and described in this thesis) included flame atomic absorption, scanning electron microscopy, transmission electron microscopy, Malvern particle size counting, Raman spectroscopy, FT- infrared spectroscopy, N2 and C02 adsorption studies, and sequential pyrolysis GC-MS. Thesis Newfoundland studies University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI)
institution Open Polar
collection Memorial University of Newfoundland: Digital Archives Initiative (DAI)
op_collection_id ftmemorialunivdc
language English
topic Waste tires--Recycling
Pyrolysis
Char--Analysis
spellingShingle Waste tires--Recycling
Pyrolysis
Char--Analysis
Popovic, Nevena, 1952-
Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis
topic_facet Waste tires--Recycling
Pyrolysis
Char--Analysis
description Thesis (M.Sc.)--Memorial University of Newfoundland, 2000. Chemistry Bibliography: leaves 100-106 In the search for a commercially efficient technology for solving the problem of scrap tires, pyrolysis is accepted as an environmentally and economically attractive recycling method to recover useful products from scrap tire waste. Ireton International Waste Management is commercially developing an ultra fast pyrolysis technology called the Continuous Ablative Reactor (CAR) which can heat solid particles to a high temperature (500-600 °C) in under one second. The pyrolytic char obtained in this ultra fast pyrolysis process has been characterized and efforts were made to upgrade the product. EnerVision Inc. (Halifax) provided samples from their pilot unit. Initial investigations were focused on the char in its original form. The char contained inorganic compounds present in tires, along with the original carbon black and a substantial amount of condensed organic by-products formed during the pyrolysis process. The contaminants in the char were reflected in an oily appearance, specific odour and high ash content These contaminants can be eliminated, or significantly reduced. The economic feasibility of the process depends on the char quality and its usefulness in high value commercial applications. -- High temperature heat treatments (600-900 °C) and oxidation processes using various agents (i.e., air, H202, HN03) present an opportunity to elevate the char quality and improve its commercial value. In this study, it was demonstrated that the production of highly activated char is possible by activation using steam or carbon dioxide. The adsorption properties of the activated char so obtained were found to be comparable to those of the commercial active carbons. Hence, ultra fast pyrolysis may provide a recycling alternative for waste tires and for the production of new adsorbents from low-cost waste material. -- Analytical techniques used in characterizing the chars and activated chars (and described in this thesis) included flame atomic absorption, scanning electron microscopy, transmission electron microscopy, Malvern particle size counting, Raman spectroscopy, FT- infrared spectroscopy, N2 and C02 adsorption studies, and sequential pyrolysis GC-MS.
author2 Memorial University of Newfoundland. Dept. of Chemistry
format Thesis
author Popovic, Nevena, 1952-
author_facet Popovic, Nevena, 1952-
author_sort Popovic, Nevena, 1952-
title Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis
title_short Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis
title_full Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis
title_fullStr Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis
title_full_unstemmed Physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis
title_sort physical and chemical characterization and upgrading of char derived from scrap tires by ultra fast pyrolysis
publishDate 2000
url http://collections.mun.ca/cdm/ref/collection/theses3/id/81869
genre Newfoundland studies
University of Newfoundland
genre_facet Newfoundland studies
University of Newfoundland
op_source Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
op_relation Electronic Theses and Dissertations
(25.89 MB) -- http://collections.mun.ca/PDFs/theses/Popovic_Nevena.pdf
a1477375
http://collections.mun.ca/cdm/ref/collection/theses3/id/81869
op_rights The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
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