Preliminary Study:Furfural Production from Oat Husks via Phosphorus-Containing Catalysts Catalyzed Hydrothermal Pretreatment in the Context of Biorefinery  

作　　者：Prans Brazdausks Maris Puke Guntis Sosins 

机构地区：[1]Biorefinery Laboratory,Latvian State Institute of Wood Chemistry,Riga,LV-1001,Latvia

出　　处：《Journal of Renewable Materials》2025年第4期719-730,共12页可再生材料杂志(英文)

基　　金：funded by the Latvian State Institute of Wood Chemistry Bioeconomic Research Grant No.09-24 titled“Selective Valorization of Lignocellulosic Biomass(SeVaLi)”.

摘　　要：Oat husks,a byproduct of oat milling operations with limited economic value,present a promising feedstock for biorefinery processes due to their chemical composition.This study investigates the conversion of C5 carbohydrates in oat husks into furfural through hydrothermal pretreatment using various phosphate-based catalysts,including H3PO4,NH4H2PO4,NaH2PO4,KH2PO4,K2HPO4 and K3PO4 as catalyst.The catalysts’effectiveness in promoting furfural production was evaluated under identical hydrothermal conditions(treatment time for 60 min at a constant temperature of 170℃ and a catalyst amount).Continuous water steam was used to strip furfural from the reaction zone and minimize its degradation.Results indicated that H3PO4 was the most effective catalyst,achieving a furfural yield of 13.99 wt.%,which corresponds to approximately 57%of the theoretical yield.NH4H2PO4 also showed moderate effectiveness,while sodium and potassium phosphate salts were significantly less effective.A scanning electron microscope analysis shows that catalysts with lower pH may disrupt the oat husks external layer thus providing a higher C5 carbohydrates conversion rate into furfural.The chemical complexity of oat husk contributes to side reactions between its carbohydrates and lignin during the hydrothermal treatment.This results in an increase in acid-insoluble lignin and inorganic matter in the oat husk lignocellulosic residue,which can reduce the effectiveness of further cellulose saccharification by enzymatic hydrolysis.

关 键 词：Oat husks hydrothermal pretreatment furfural BIOREFINERY 

分 类 号：TQ35[化学工程]