OP-II-3

PP-III-36The kinetics of acid hydrolysis of AG and GGM was studied isothermally in abatch reactor. A number of homogenous acids such as hydrocloric acid (HCI),sulphuric acic (H 2 SO 4 ) and trifluoroacetic acid (TFA) were tested and their effects onthe rates compared. The main reaction parameters were the acid concentration(pH=1-3), temperatures up to 100°C and substrate concentrations. The hydrolysisrates increased with the acid concentration (pH) and temperature. Completehydrolysis of AG and GGM was achieved without any further degradation of themonomers. The activities of acidic heterogenous catalysts such as ion exchangeresins and zeolites were also elucidated. Their application in biomass hydrolysis isinline with green chemistry approach in the development of novel technologies.References[1]. Willför, S.; Holmbom, B. “Isolation and characterization of water-soluble polysaccharides fromNorway spruce and Scots pine”, J. Wood. Sci. Technol., 2004, 38, 173–179.[2]. Xu, C.; Pranovich, A.; Vähäsalo, L.; Hemming, J.; Holmbom, B.; Schols, H.; Willför, S. “Kinetics ofacid hydrolysis of water-soluble spruce O-acetyl galactoglucomannans”, J. Agric. Food Chem.,2008, 56, 2429-2435.[3]. Kusema, B.; Xu, C.; Mäki-Arvela, P.; Willför, S.; Holmbom, B.; Salmi, T.; and Murzin, D. "Kineticsof acid hydrolysis of arabinogalactans", I. J. Chem. Reactor Eng., 2010, Vol. 8, 1.[4]. Kelly, G.; “Larch Arabinogalactan:Clinical relevance of a novel immune-enhancingpolysaccharide”, 1999, Altern. Med. Rev. 4, 96-103.[5]. Willför, S.; Sundberg, K.; Tenkanen, M.; Holmbom, B. “Spruce derived mannans – a potential rawmaterial for hydrocolloids and novel advanced natural materials”. Carbohydr. Polym., 2008,10.1016/j.carbopol.2007.08.006.AcknowledgementsThis work is part of the activities of the Process Chemistry Centre (PCC) at Åbo AkademiUniversity within the Finnish Centre of Excellence Programme (2006-2011) by the Academyof Finland.507