2e Journée de réflexion de l'EDT GEPROC : Génie des procédés appliqué aux bio-industries. 16 décembre 2009, Faculté universitaire des Sciences agronomiques, Gembloux, Belgique
Yes (verified by ORBi)
[en] Steam explosion ; Vapocraking ; Pretreatment
[en] Steam explosion is a thermomechanochemical process which allows the breakdown of lignocellulosic structural components by steam heating, hydrolysis of glycosidic bonds by organic acid formed during the process and shearing forces due to the expansion of the moisture. The process is composed of two distinct stages: vapocracking and explosive decompression. Cumul effects of both phases include modification of the physical properties of the material (specific surface area, water retention capacities, color, cellulose cristallinity rate,…), hydrolysis of hemicellulosic components (mono and oligosaccharides released) and modification of the chemical structure of lignin. These effects permit the opening of lignocellulosic structures and increase the enzymatic hydrolysis rate of cellulose components in the aim to obtain fermentable sugars used in second generation biofuels or high value-added molecules process.