Kinetics of hydroxylation of phenol with SiC foam supported TS-1 structured catalyst  

作　　者：Yanzhao Sun Zhitao Lv Siyu Zhang Guodong Wen Yilai Jiao 

机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China

出　　处：《Frontiers of Chemical Science and Engineering》2024年第11期257-267,共11页化学科学与工程前沿（英文版）

基　　金：National Key Research and Development Program(Grant No.2023YFB3810600);National Natural Science Foundation of China(Grant No.2237081611);European Union’s Horizon 2020 Research and Innovation Program(Grant No.872102);Natural Science Foundation of Liaoning Province(Grant No.2022-MS-002).

摘　　要：In light of the challenges associated with catalyst separation and recovery,as well as the low production efficiency resulting from intermittent operation for titanium silicalite-1(TS-1)catalyzed phenol hydroxylation to dihydroxybenzene in the slurry bed,researchers keep on exploring the use of a continuous fixed bed to replace the slurry bed process in recent years.This study focuses on preparing a TS-1 coated structured catalyst on SiC foam,which exhibits significant process intensification in performance.We investigated the kinetics of this structured catalyst and compared it with those of extruded TS-1 catalyst;the dynamic equations of the two catalysts were obtained.It was observed that both catalysts followed E-R adsorption mechanism model,with an effective internal diffusion factor ratio between structured and extruded TS-1 of approximately 7.71.It was confirmed that the foamed SiC-based structured TS-1 catalyst exhibited significant improvements in phenol hydroxylation in fixed-bed reactor due to its well-developed pore structure,good thermal conductivity,excellent internal mass transfer performance,and short reactant diffusion distance,leading to higher utilization efficiency of active components.This finding also provides a foundation for designing and developing phenol hydroxylation processes in fixed-bed using structured catalysts through computational fluid dynamics calculations.

关 键 词：titanium silicalite-1 phenol hydroxylation SiC foam structured catalyst coating 

分 类 号：O643.36[理学—物理化学] O621.251[理学—化学]