Selective Hydrolysis of Arabinogalactan into Arabinose and Galactose Over Heterogeneous Catalysts

Abstract

The application of solid acid catalysts for the production of monomers from hemicelluloses can be one of the key steps in developing the concept of an integrated forest biorefinery. Arabinogalactans (AG) are hemicelluloses which can be extracted on an industrial scale from larch wood species and has a great potential as a sustainable feedstock for bio-based products. Hydrolysis of AG to monomers over acidic heterogeneous catalysts (Smopex-101 and Amberlyst 15) was successfully demonstrated for the first time to selectively produce arabinose as the primary product, followed by the release of galactose without further degradation of the monomers.

Hemicellulose arabinogalactan hydrolytic hydrogenation over Ru-modified H-USY zeolites

“…5b) in catalytic and non-catalytic experiments. In contrast to HCl-catalyzed hydrolysis, in which the release of sugars follows stoichiometry (6) [13], the substoichiometric formation of galactose in our experiments indicates a preferential cleavage of the side chain. This behavior was already observed upon AG hydrolytic hydrogenation over beta zeolites [19] (ratio close to 1.6) and for AG hydrolysis over a heterogeneous catalyst of an ion-exchange type bearing sulfonic groups [13].…”

“…The preparation of the free sugars arabinose and galactose has been first attempted using sulfonic acid-functionalized polymers [13]. In comparison with such catalysis better results in terms of catalyst activity and stability were obtained with zeolites in their protonic form in the case of xylan hydrolysis [14].…”

Extraction of arabinoxylans from wheat bran using hydrothermal processes assisted by heterogeneous catalysts

“…below 100 ºC) is not able to break the cross-links between the WUAXs and the wall matrix (Izydorczyk & Biliaderis, 2007). In order to improve the AXs extraction yield from different biomass, several techniques, such as hydrothermal treatments (Bobleter, 1994;Buranov & Mazza, 2010;Carvalheiro, Garrote, Parajó, Pereira, & Gírio, 2005;Dien et al, 2006;Garrote, Domínguez, & Parajó, 1999;Garrote, Domínguez, & Parajó, 2001;Garrote, Domínguez, & Parajó, 2002;Kim, Hendrickson, Mosier, & Ladisch, 2009;Lavarack, Griffin, & Rodman, 2000;Li, Converse, & Wyman, 2003;Maes & Delcour, 2002;Mok & Antal, 1992;Nabarlatz, Farriol, & Montané, 2004;Negahdar, Delidovich, & Palkovits, 2016;Reisinger et al, 2013;Shen & Wyman, 2011;Tekin et al, 2014), chemical-solvent extractions (Adams et al, 1955;Aguedo, Fougnies, Dermience, & Richel, 2014;Bataillon, Mathaly, Nunes Cardinali, & Duchiron, 1998;Buranov & Mazza, 2010;Choteborská et al, 2004;Doner, Chau, Fishman, & Hicks, 1998;Höije, Gröndahl, TØmmeraas, & Gatenholm, 2005;Hollmann & Lindhauer, 2005;Kim, Kreke, & Ladisch, 2013;Kusema et al, 2011;Lavarack, Griffin, & Rodman, 2002;Maes & Delcour, 2002;Shen & Wyman, 2011;Swennen, Courtin, Lindemans, & Delcour, 2006;Xu et al, 2006;Yao, Nie, Yuan, Wang, & Qin, 2015;…”

“…They achieved a yield of xylose and arabinose of 62% at 170 ºC after 1 hour of extraction time using HBeta zeolite (Si/Al=19). Kusema et al (Kusema et al, 2011) and Salmi et al (Salmi et al, 2014) have studied the hydrolysis of commercial arabinogalactans into monomers over homogeneous and heterogeneous catalysts but not the extraction itself from a real biomass. Catalytic processes can reduce operation times and thus products degradation and energy consumption.…”

Processing microalgae: beyond lipids

“…Moreover, the algal cell wall contains polysaccharides with glucose, xylose, galactose and arabinose as monomeric units [15]. Hydrolysis of polysaccharides with homogeneous and heterogeneous catalysts can be done in the same way as for wood biomass-derived hemicelluloses, namely of arabinogalacants and galactoglucomannans [16][17][18], and xylans from plant residues [19].…”