文献类型：期刊文献

英文题名：Mass transfer characterization for hydrocarbon liquid-particle collision based on sensitive tracing of fluorescent probe

作者：Xu, Liuqing[1,2];Sun, Jingyuan[1,2];Wang, Jingdai[1,3];Zhao, Weijun[4];Yang, Yongrong[1,3]

机构：[1]Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China;[2]Zhejiang Prov Key Lab Adv Chem Engn Manufacture Te, Hangzhou, Peoples R China;[3]Zhejiang Univ, State Key Lab Chem Engn, Hangzhou, Peoples R China;[4]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：69

期号：5

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20225113282318);WOS:【SCI-EXPANDED(收录号:WOS:000900798300001)】；

基金：Y National Natural Science Foundation of China,Grant/Award Number: 22178304; The Science Fund for Creative Research Groups of National Natural Science Foundation of China,Grant/Award Number: 61621002

语种：英文

外文关键词：droplet-particle collision; fluorescent probe; Marangoni convection; mass transfer; sensitive tracing of hydrocarbon liquid

摘要：The heat and mass transfer characteristics during the collision process of hydrocarbon droplets and polyethylene particles in a liquid-containing gas-solid polyethylene fluidized bed reactor significantly affect the product quality. In this work, the mass transfer process of single-component hydrocarbon and bi-component hydrocarbon liquid films on the polyethylene particle surface were quantitatively characterized by a newly developed experimental approach, based on a novel synthesized hydrocarbon liquid soluble fluorescent probe for sensitive tracing of hydrocarbon liquid diffusion. It was found that the boiling point and surface tension of the liquid as well as the surface temperature of the particle are the key factors affecting the mass transfer properties of the liquid film. Marangoni convection was observed and characterized on the particle surface. The critical time for the onset of Marangoni flow is between 4 and 8 s.