Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/15867
Title: Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating
Authors: LIM SIEW MEI
Keywords: low temperature-long-term heating, moisture transport, self-heating, chemisorption, porous model, wood
Issue Date: 21-May-2009
Source: LIM SIEW MEI (2009-05-21). Thermal combustion and oxygen chemisorption of wood exposed to low temperature long term heating. ScholarBank@NUS Repository.
Abstract: This research studied the combustion of wood exposed to low-temperature for an extended duration. The role of moisture was investigated using a revised analytical heat conduction model. The results showed that the allowance of moisture effects through the use of moisture-mediated thermophysical terms were not sufficient to capture the spontaneous ignition mechanism of green wood. Two low-temperature heating models were developed. For the initial drying phase (IDP) model, evaporation was modeled as a boundary condition for initial drying. As heating continues above 100B0C, and internal evaporation term was re-introduced for extended drying phase (EDP) model. The numerical solution illustrated the importance of the interaction of moisture flows and temperature development for self-heating. Chemisorption was examined for nitrogen-heated and air-preheated wood chars exposed to 140B0C and 150B0C up to 50 days. Fourier-transform Infra-red Spectroscopy (FTIR) showed that as the formation of C=O groups stabilised the wood chars, pyrophoric wood chars would only be formed when pre-exposed to temperature lower than 200B0C.
URI: http://scholarbank.nus.edu.sg/handle/10635/15867
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
TITLE & CONTENT PAGE.pdf154.91 kBAdobe PDF

OPEN

NoneView/Download
Chapter 1.pdf110.04 kBAdobe PDF

OPEN

NoneView/Download
Chapter 2.pdf132.32 kBAdobe PDF

OPEN

NoneView/Download
Chapter 3.pdf90.86 kBAdobe PDF

OPEN

NoneView/Download
Chapter 4.pdf339.13 kBAdobe PDF

OPEN

NoneView/Download
Chapter 5.pdf127.29 kBAdobe PDF

OPEN

NoneView/Download
Chapter 6.pdf1.65 MBAdobe PDF

OPEN

NoneView/Download
Chapter 7.pdf64.05 kBAdobe PDF

OPEN

NoneView/Download
Bibliography.pdf72.12 kBAdobe PDF

OPEN

NoneView/Download
Selected Publications.pdf23.41 kBAdobe PDF

OPEN

NoneView/Download
Cover page.pdf8.24 kBAdobe PDF

OPEN

NoneView/Download

Page view(s)

333
checked on Dec 18, 2017

Download(s)

2,763
checked on Dec 18, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.