Lignocellulosic biomass and Algae are feedstocks that hold great potential in production of sustainable biofuels, materials and chemicals. This work focusses on the application of ionic liquid based fractionation of lignocellulosic biomass and algae. Firstly, the pretreatment of Miscanthus x giganteus using different ionic liquid with low concentration was performed. The delignification yield increased gradually as concentration of ionic liquids go higher. Dilute triethylammonium hydrogen sulphate with different cation: anion ratio was used in pretreatment of miscanthis, pine and willow. The results showed increased removal of cellulose, hemicellulose and lignin with lower cation:anion ratio. Liquor analysis on liquid phase after pretreatment using triethylammonium hydrogen sulphate on Miscanthus under varies of conditions indicate that hemicellulose removal rate is better under conditions of higher temperatures and longer reaction time. Secondly, Algae fractionation using ionoSolv process was tested. Among all seaweeds tested, Posidonia oceanica showed high saccharification yield after pretreatment under very mild conditions. Finally, 2-stage pretreatment aiming to remove hemicellulose and lignin in two separate steps was carried out. The results showed promising hemicellulose removal and delignification yield with promising saccharification yield. A further study on using recycled ionic liquid in the 2nd stage pretreatment has demonstrated consistent results of effective pretreatment over 5 cycles.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:739664 |
| Date | January 2017 |
| Creators | Tian, Bing |
| Contributors | Hallett, Jason |
| Publisher | Imperial College London |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://hdl.handle.net/10044/1/57957 |
Page generated in 0.1727 seconds