Solid acid catalysts show good catalytic depolymerization behavior for lignocellulose. Xucheng Zhang, a,b Xuesong Tan, a Yan Xu, c Wen Wang, a Longlong Ma, a and Wei Qi a,* Preparation of Core-Shell Structure Magnetic Carbon-Based Solid Acid and its Catalytic Performance on Hemicellulose in Corncobs This data can be used as a reference for the subsequent use of biomass resource. The depolymerization of corncobs was achieved by magnetic catalyst, representing the depolymerization characteristics of real lignocellulose. The catalyst was used repeatedly more than 3 times, and the recovery over 89%. Furthermore, the catalyst was stably dispersed in the reaction system, quickly separated from the reaction system using an external field, and reused many times 44.3% of xylose yield was obtained at 160 ☌ for 16 h. Its surface topography, functional group, chemical composition, and magnetic properties were characterized by analysis instrument. The best preparation conditions for MSAC were 3 h of carbonization time, 450 ☌ as the carbonization temperature, 9 h of sulfonation time, and 90 ☌ as the sulfonation temperature. The results showed that preparation conditions had great influence on the quantity of the acidic groups (sulfonic, carboxyl, and hydroxyl groups) and the stability of magnetic catalysts. The effects of the carbonization and sulfonation processes on the activity of the catalyst were investigated. A stable core-shell structured magnetic solid acid catalyst (MSAC), Fe3O4/C-SO3H, was prepared from glucose, concentrated sulfuric acid, and modified magnetic particles of Fe3O4, which was used as the core. 'Preparation of core shell structure magnetic carbon-based solid acid and its catalytic performance on hemicellulose in corncobs,' BioRes. Zhang, X., Tan, X., Xu, Y., Wang, W., Ma, L., and Qi, W.

Chemical review core shell structure