【摘 要】
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Disruption of lignocellulosic structure of biomass plays a key role in producing biohydrogen from lignocelluloses.This study investigated the effects of mic
【机 构】
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State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China
【出 处】
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The 4th International Conference on Biomass Energy Technolog
论文部分内容阅读
Disruption of lignocellulosic structure of biomass plays a key role in producing biohydrogen from lignocelluloses.This study investigated the effects of microwave-heated dilute acid pretreatment(MHAP)and steam-heated dilute acid pretreatment(SHAP)on cassava residue structure.SEM,TEM,XRD and FTIR analysis were employed to recognize the physicochemical properties of cassava residue after MHAP and SHAP.SEM images revealed that lignocellulosic matrix of cassava residue was damaged significantly with cracks and micropores(2-4 μm)on the surface.TEM images showed that the integrity of cell wall was damaged with occurrence of separated cell wall layers.XRD indicated that the crystallinity index of cassava residue(23.67)was increased to 33.00 and 25.88,respectively,due to deconstruction of amorphous cellulose.FTIR showed that the peak intensity of hemicellulose decreased significantly.The dark hydrogen yield from cassava residue after SHAP was 102.1 ± 6.7mL/g TVS and the subsequent methane yield was 93.2 ± 12.5mL/g TVS,resulting in an energy conversion efficiency of 24.7%.
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