Upgrading of recycled carbon for energy storage applications
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Doja, Somi
issued: 2023-06-07T07:00:00Z
issued: 2022
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: An indispensable component of many land-based transportation systems are tires. Tires are composed of materials resistant to both physical and chemical changes and do not readily degrade naturally in the environment. Particularly, mining tires are designed to operate in harsh environments and hence are highly resistant to degradation. However, despite their omnipresence, the recycling of mining tires has not been thoroughly researched, and without suitable end-of-life solutions, discarded mining tires pose dire ecological and economical challenges. In this research, chemical and heat treatment methods were employed to study the upgrading of carbon black obtained from a tire recycling operation. Chemical treatment was employed to remove inorganic impurities present in the char, while a heat treatment was required for the removal of volatiles (for example sulphur) which could not be removed by chemical treatments. Acids including HCl, HNO₃, H₂SO₄ were successful in removing Zn, Fe, and other metallic impurities, whereas NaOH and KOH were used to remove Si. Heat treatment experiments under N₂ proved to be successful in S removal. A combination of chemical treatment (5M HCl and 10M NaOH leaching), along with thermal treatment (950°C), was ideal for removing most impurities from the recovered carbon black (rCB) yielding a purity of >98 wt%. Activation experiments were performed on purified rCB using KOH and CO2. Activated carbon obtained from KOH treatment exhibited the highest surface area of 994 m²/g. Purified and activated rCB was tested for Li-ion battery applications. The activated rCB anode showed a maximum discharge capacity of 1853 mAh/g. However, the capacity drop for activated rCB cells was greater than 40% after the first cycle of charge, likely due to the formation of solid electrolyte interface and irreversible side reactions. In addition, rCB was also used as an additive material in lithium titanate oxide (LTO) battery anodes. rCB proved to be a stable addi…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/81808
note: Upgrading of recycled carbon forenergy storage applicationsbySomi DojaMASc, University of British Columbia, 2017B.Tech., Jamia Millia Islamia, 2015A THESIS SUBMITTED IN PARTIAL FULFILLMENT OFTHE REQUIREMENTS FOR THE DEGREE OFDOCTOR OF PHILOSOPHYinThe College of Graduate Studies(Mechanical Engineering)THE UNIVERSITY OF BRITISH COLUMBIA(Okanagan)June 2022© Somi Doja 2022The following individuals certify that they have read, and recommend to the College ofGraduate Studies for acceptance, a dissertation entitled:Upgrading of recycled carbon for energy storage applicationssubmitted by Somi Doja in partial fulfilment of the requirements of the degree ofDoctor of Philosophy.Dr. Lukas Bichler, School of EngineeringSupervisorDr. Jian Liu, School of EngineeringSupervisory Committee MemberDr. Alexander Uhl, School of EngineeringSupervisory Committee MemberDr. John Steen, University of British Columbia - VancouverUniversity ExaminerDr. Houshang Alamdari, University of LavalExternal ExamineriiAbstractAn indispensable component of many land-based transportation systems are tires. Tiresare composed of materials resistant to both physical and chemical changes and do notreadily degrade naturally in the environment. Particularly, mining tires are designed tooperate in harsh environments and hence are highly resistant to degradation. However,despite their omnipresence, the recycling of mining tires has not been thoroughlyresearched, and without suitable end-of-life solutions, discarded mining tires pose direecological and economical challenges.In this research, chemical and heat treatment methods were employed to study theupgrading of carbon black obtained from a tire recycling operation. Chemical treatment wasemployed to remove inorganic impurities present in the char, while a heat treatment wasrequired for the removal of volatiles (for example sulphur) which could not be removed bychemical treatments. Acids including HCl, HNO3, H2SO4 were successful in removing Zn,Fe, and other meta…
has type: Thesis/Dissertation
date issued: 2022-09
is shown at: 10.14288/1.0415705
language: eng
degree discipline: Mechanical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Bichler, Lukas
type: Text
identifier URI: http://hdl.handle.net/2429/81808