Download the full-sized PDF of CO2 gasification of industrial cokes and characterization of cokes  produced in laboratoryDownload the full-sized PDF



Permanent link (DOI):


Export to: EndNote  |  Zotero  |  Mendeley


This file is in the following communities:

Graduate Studies and Research, Faculty of


This file is in the following collections:

Theses and Dissertations

CO2 gasification of industrial cokes and characterization of cokes produced in laboratory Open Access


Other title
coke, CRI, kinetic parameters, binder, conversion, porosity, Raman spectroscopy
Type of item
Degree grantor
University of Alberta
Author or creator
Basher, Sania Tasnim
Supervisor and department
Gupta, Rajender (Chemical & Materials Engineering)
Examining committee member and department
Liu, Qi (Chemical & Materials Engineering)
Kumar, Amit (Mechanical Engineering)
Choi, Phillip (Chemical & Materials Engineering)
Department of Chemical and Materials Engineering
Chemical Engineering
Date accepted
Graduation date
2017-11:Fall 2017
Master of Science
Degree level
Metallurgical coke is an important raw material for iron making in a blast furnace. Two significant criteria for selecting high quality coke are Coke Reactivity Index (CRI) and Coke Strength after Reaction with carbon dioxide (CSR). CSR and CRI tests are expensive, labor-intensive and time-consuming. Meanwhile, CSR has linear inverse relation with CRI. Hence, research for coke quality can be focused on coke reactivity with CO2, which depicts the CRI. Part of this study aims at analyzing coke gasification with carbon dioxide of industrially manufactured coke. Thermo-gravimetric analysis of cokes was conducted by heating the cokes to a certain temperature and soaking in CO2. Using non-isothermal methods, the kinetic parameters, such as activation energy and pre-exponential constant, were calculated during the heating period in CO2. Conversions during the soaking period were also obtained from TGA and were correlated with CRI of the cokes. Another part of study was concentrated on production of cokes in laboratory. Different bituminous, coking coals and a sub-bituminous coal were used for coal carbonization, which was conducted in a horizontal tube furnace by heating samples in an inert atmosphere at different heating rates. Samples were also produced by addition of two binders, asphaltene and ash free coal, in bituminous and sub-bituminous coal and the effect of the binders on the carbonization products were studied. In this study, the CO2 reactivity of the cokes was detected by using Thermo-Gravimetric Analysis (TGA); the samples were heated to 1100˚C in an inert atmosphere and soaked at 1100 ˚C in CO2 for two hours. Total porosity of the cokes was determined by using image stitching of thin sections in digital microscopy at 250X magnification, followed by image processing in MATLAB. Raman spectroscopy was carried out to observe the spectra radiated from the coke samples, which gave two distinct peaks, indicative of graphitic carbon and disoriented carbon; extent of graphitization was calculated using the area under the peaks.
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
File format: pdf (PDF/A)
Mime type: application/pdf
File size: 4081592
Last modified: 2017:11:08 17:59:51-07:00
Filename: Basher_Sania Tasnim_201709_MSc.pdf
Original checksum: f63fe8fdedbb1a7136bac103c2fd560d
Activity of users you follow
User Activity Date