Please use this identifier to cite or link to this item:
Title: Thermochemical Conversion of Biomass: Acid Catalysed Pathways and Kinetics of Cellulose Pyrolysis
Keywords: cellulose, biomass, pyrolysis, kinetics, levoglucosan, levoglucosenone
Issue Date: 2-Aug-2012
Citation: SHAIK MOHAMED SALIM (2012-08-02). Thermochemical Conversion of Biomass: Acid Catalysed Pathways and Kinetics of Cellulose Pyrolysis. ScholarBank@NUS Repository.
Abstract: Cellulose thermal degradation can proceed via transglycosylation and beta-elimination to produce anhydrosaccharides and other light organics. Here, we have studied the qualitative, quantitative and kinetic effects of acids and alkalis on the yield of anhydrosaccharides. The extent of cellulose conversion via beta-elimination depends on the amount and strength of acid infused within the cellulose matrix. However, the beta-elimination route could also be suppressed/controlled by a neutralising species (OH- ions). The apparent activation energy of the conversion was also increased to ca. 250 kJ/mol by acids and decreased to ca. 180 kJ/mol by alkalis signifying the predominance of beta-elimination and transglycosylation respectively. For conversion of cellulose in alkaline sulfolane, anhydrosaccharide yields increased by ca. 20 % and indicated an optimal H+ ion concentration. Hence, a new method towards the selective production of chiral intermediates (anhydrosaccharides) via manipulation of H+ ion level has been demonstrated.
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
ShaikMS.pdf3.65 MBAdobe PDF



Page view(s)

checked on Nov 17, 2018


checked on Nov 17, 2018

Google ScholarTM


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