Kraft GL-ethanol pretreatment on sugarcane bagasse for effective enzymatic hydrolysis

Lignocellulosic biomass to biofuels and biochemicals: A comprehensive review with a focus on ethanol organosolv pretreatment technology

“… Source : Agnihotri, Johnsen, Bøe, Øyaas, and Moe (), Chen, Zhao, Hu, Zhao, and Liu (), Guo, Zhou, Wen, Sun, and Sun, (), H. Zhang and Wu (), Hideno, Kawashima, Endo, Honda, and Morita (), Huijgen, Smit, Reith, and Uil (), Tang, Chen et al (), Tang, Shan et al (), Yu et al (), and Zhou et al ().…”

“…Green liquor (GL) from the pulping process is a kind of alkaline liquid, which is a promising substitute to sodium hydroxide during pretreatment. Recently, the use of GL for ethanol organosolv pretreatment of lignocellulosic biomass has drawn wide attention due to its high selectively for delignification and high retention of carbohydrates (Yu et al, , ; Zhou et al, ).…”

“…Acid‐catalyzed pretreatment—Agnihotri et al (), Bouxin, David Jackson, and Jarvis (), Goh, Tan, Lee, and Brosse (), Hideno et al (), Huijgen et al (), Ingram et al (), Lai, Tu, Li, and Yu (), Muñoz et al (), Sannigrahi et al (), Wildschut et al (), Y. Kim et al (), and Z. Li, Jiang, Fei, Pan et al (). Alkali‐catalyzed pretreatment—Del Rio et al (), N. Park, Kim, Koo, Yeo, and Choi (), Tang, Chen et al (), Tang, Shan et al (), Yu et al (), Z. Li, et al (), and Zhou et al () [Color figure can be viewed at wileyonlinelibrary.com]…”

“…Delignification and degradation of hemicellulose can increase the accessibility of lignocellulosic biomass to enzymes and reduce the nonproductive absorption to enzyme. Hence, the enzymatic digestibility of lignocellulosic biomass can be significantly improved after ethanol organosolv pretreatment (Yu et al, ; Zhou et al, ). The cellulosic surface area and the ratio of accessible pore areas can be determined in the wet state by staining methods, such as Simons’ staining (Chandra, Ewanick, Hsieh, & Saddler, ; Wiman et al, ).…”

“…Increasing the hydrophilic property of the substrate will decrease the nonproductive adsorption of cellulase to lignin (Nakagame, Chandra, Kadla, & Saddler, ). After ethanol organoslv pretreatment, the contact angle of pretreated sugarcane bagasse was decreased, indicating that the pretreated substrate is more hydrophilic than untreated sugarcane bagasse (Yu et al, ; Zhou et al, ).…”