Thesis-2000-Maxwell.pdf (9.15 MB)
An investigation into the gasification of coals, coal macerals and chars at high pressure
thesis
posted on 2018-10-18, 09:03 authored by Stuart MaxwellA suite of coals covering a range of properties was gasified in a pressurised thermogravimetric
analyser (PTGA) at 950°C and 2.5 MPa. The reactivities of the coals to steam were measured
to determine any relationships between coal properties and reactivity. Some of the coals were
pre-pyrolysed to produce chars, and the reactivity of these chars was measured both in steam and
CO2. The results show that no simple relationships exist but trends can be shown whereby
reactivity increases with decreasing carbon content, increasing volatile matter and decreasing
mean vitrinite reflectance. Coal minerals, notably CaO, also increased reactivity to some extent
in coals of low carbon content, yet carbon content itself influenced reactivity more than mineral
content. The effect of pre-pyrolysis of the coals on reactivity appears to be dependent on coal
rank, with higher rank coals (carbon content above 83%) showing an increase in reactivity
whereas lower rank coals show a marked decrease. [Continues.]
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Publisher
© Stuart MaxwellPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2000Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en