Peer-Reviewed Journal Details
Mandatory Fields
Lin, RC;Deng, C;Rajendran, K;Bose, A;Kang, XH;Murphy, JD
2020
October
Frontiers In Energy Research
Competing Reactions Limit Production of Sugars in Hydrothermal Hydrolysis of Grass Silage: An Assessment of the Effect of Temperature on Sugar Production and Parasitic Energy Demand
Validated
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Optional Fields
ENZYMATIC-HYDROLYSIS LIGNOCELLULOSIC BIOMASS FERMENTATIVE HYDROGEN BIOFUEL PRODUCTION METHANE PRODUCTION ACID PRETREATMENT FOOD WASTE STRATEGIES BIOHYDROGEN BIOMETHANE
8
Grass represents a major renewable feedstock in temperate climate zones, but its efficient utilization is challenging in biorefineries and advanced biofuels due to its structural recalcitrance. Here hydrothermal hydrolysis (100-180 degrees C, for up to 40 min duration) was investigated to improve sugar yields from grass silage. The optimal conditions (140 degrees C for 20 min duration) showed the highest sugar yield of 0.29 g/g volatile solid (VS) of grass silage. Further increasing the temperature to 180 degrees C favored degradation of sugars (such as glucose, xylose) to by-products (such as furfural, hydroxymethylfurfural). A first-order reaction model confirmed a two-step reaction with the first step hydrolysis and the second step degradation. An energy balance calculation indicated that pre-treatment at 140 degrees C required an energy input of 16.5 kJ/g VS, which could be significantly reduced to 5.1 kJ/g VS through efficient heat recovery. This research assists in understanding of the hydrolysis mechanism and provides a practical solution to produce grass-based sugars for further advanced biofuel and biorefinery applications.
LAUSANNE
2296-598X
10.3389/fenrg.2020.575523
Grant Details