Department of Chemistry, University of Science and Technology of China, Hefei, China.
Sci Rep. 2013;3:2419. doi: 10.1038/srep02419.
In this work, sawdust, a biomass waste, is converted into a magnetic porous carbonaceous (MPC) solid acid catalyst by an integrated fast pyrolysis-sulfonation process. The resultant magnetic solid acid has a porous structure with high surface area of 296.4 m(2) g(-1), which can be attributed to the catalytic effect of Fe. The catalytic activity and recyclability of the solid acid catalyst are evaluated during three typical acid-catalyzed reactions: esterification, dehydration, and hydrolysis. The favorable catalytic performance in all three reactions is attributed to the acid's high strength with 2.57 mmol g(-1) of total acid sites. Moreover, the solid acid can be reused five times without a noticeable decrease in catalytic activity, indicating the stability of the porous carbon (PC)-sulfonic acid group structure. The findings in the present work offer effective alternatives for environmentally friendly utilization of abundant biomass waste.
在这项工作中，木屑这种生物质废料通过集成的快速热解-磺化工艺转化为磁性多孔碳质（MPC）固体酸催化剂。所得磁性固体酸具有多孔结构，比表面积高达 296.4 m(2) g(-1)，这归因于 Fe 的催化作用。在三个典型的酸催化反应：酯化、脱水和水解中，对固体酸催化剂的催化活性和可回收性进行了评价。在所有三个反应中都表现出良好的催化性能，这归因于其总酸位高达 2.57 mmol g(-1)的高强度酸。此外，该固体酸可以重复使用五次而没有明显的催化活性下降，这表明多孔碳（PC）-磺酸基团结构稳定。本工作的研究结果为环保利用丰富的生物质废料提供了有效的替代方案。
