Efficient hydrolysis of Babool wood (Acacia nilotica) to total reducing sugars using acid/ionic liquid combination catalyzed by modified activated carbon

Simultaneous saccharification of hemicellulose and cellulose of corncob in a one-pot system using catalysis of carbon based solid acid from lignosulfonate

“…In contrast, the hydrolysis of bamboo at a lower temperature, 32,33 but the corresponding reaction time was much longer and the yield of TRS was slight lower than ours (75.1%). Even if the maximum TRS yield of 83.7% in [BMIM][Cl]was achieved in 60 min at 120 °C by Tyagi et al, 30 the employment of homogeneous mineral acid and the tedious two-step reaction procedures are expected to be improved. Besides, DES system has been frequently investigated to remove hemicellulose, extract lignin, and retain cellulose, primarily contributed by the cleavages of lignin-carbohydrate linkages and b-O-4 bond.…”

“…However, the employment of homogeneous mineral acid and the tedious two-step reaction procedures are expected to be improved. 30 In another study, Bai et al 31 In this study, corncob hydrolyses respective in an aqueous solution and [BMIM][Cl] with carbon-based solid acid prepared from sodium lignosulfonate were investigated, where hemicellulose and cellulose were hydrolysed to reducing sugars directly and simultaneously by the catalysis of a carbon-based solid acid. In the previous study, we studied the preparation of this catalyst (SI-C-S-H 2 O 2 ) for the hydrolysis of hemicellulose in corncob, which claried that the phenolic hydroxyl and carboxyl sites acted as binding regions, and the sulfonic groups acted as hydrolysis regions, and achieved a relatively high xylose yield of 84.2% at 130 °C for 12 h. 35 In this paper, we rst used SI-C-S-H 2 O 2 to catalyze corncob hydrolysis in a water system, followed by an enzymatic hydrolysis.…”

“…However, the employment of homogeneous mineral acid and the tedious two-step reaction procedures are expected to be improved. 30 In another study, Bai et al 31 studied the hydrolysis of rice straw in [BMIM][Cl] catalysed by a black liquor-derived carbonaceous solid acid and achieved a TRS yield of 36.6% at 140 °C for 150 min. Cheng et al 32 synthesized a chitosan-based solid acid catalyst immobilized with Fe 3+ to hydrolyze bamboo powder in [BMIM][Cl], and a 73.4% of TRS yield was obtained at 120 °C for 24 h. Furthermore, Si et al 33 used Tween 80 to improve the bamboo hydrolysis catalyzed by a sulfonated chitosan based solid acid in [BMIM][Cl] and a TRS yield of 68.0% was achieved at 120 °C after 24 h. Hu et al 34 used a chlorine-doped magnetic carbon solid acid with chlorine groups as cellulose-binding domains and sulfonic groups as cellulose-hydrolyzing domains for the hydrolysis of rice straw-derived cellulose in [BMIM][Cl], and a TRS yield of 73.2% was obtained at 130 °C after 4 h.…”