Please use this identifier to cite or link to this item: https://hdl.handle.net/10321/1756
Title: Selective extraction of lignin from lignocellulosic biomas using ionic liquids
Authors: Mkhize, Thandeka, Y. 
Issue Date: 2016
Abstract: 
Globally there is a drive for the use of renewable materials for the production of biofuels or high-end value chemicals. The current production of chemicals from crude oil refining is unsustainable and leads to global warming effects. Biomass is the most attractive renewable energy source for biofuel or fine chemical production. Sugarcane bagasse is a by-product of the sugar milling industry and is abundantly available.

In this study lignin was sequentially extracted using ionic liquids. The ionic liquids (ILs) 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]) and triethylammonium hydrogen sulfate ([HNEt3][HSO4]) were used to fractionate the sugarcane bagasse. The pre-treatment of sugarcane bagasse was carried out at different temperatures ranging from 90 - 150 0C and reaction times ranging from 1 - 24 h in a convection oven at a 10 % biomass loading.

Both ILs were able to dissolve the raw bagasse samples at 120 0C with [Emim][OAc] giving a lignin maxima of 28.8 % and a low pulp yield of 57 % after 12 h; [HNEt3][HSO4] gave a lignin recovery of 17.2 % and low pulp yield of 58.5 % after 6 h. Regenerated lignin was obtained by adding ethanol/ water to the mixture followed by vacuum filtration. The regenerated pulp materials were characterized by Scanning Electron Microscope (SEM) to study the morphology; Fourier Transform Infrared Spectroscopy (FTIR) to study the characteristic bands and thermal analysis to study the thermal stability.
Description: 
Submitted in fulfillment of the academic requirements for the degree of Master of Applied Sciences (Chemistry), Durban University of Technology, Durban, South Africa, 2016.
URI: http://hdl.handle.net/10321/1756
DOI: https://doi.org/10.51415/10321/1756
Appears in Collections:Theses and dissertations (Applied Sciences)

Files in This Item:
File Description SizeFormat
MKHIZET_2016.pdf8.97 MBAdobe PDFThumbnail
View/Open
Show full item record

Page view(s)

632
checked on Jul 20, 2024

Download(s) 50

1,191
checked on Jul 20, 2024

Google ScholarTM

Check

Altmetric

Altmetric


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