摘要
多相反应体系颗粒的运动及其相界面上的理化特性对于分子扩散、能量传输和反应转化起着决定性作用,它直接决定着整个化学转化过程的能耗、物耗甚至过程安全.本文简要介绍过去20年来南京大学团队及同行们在多相反应体系纳微流体及其界面性质与反应强化方面开展的一些探索工作,包括纳微流体界面传质与反应增强效应;单个纳微气泡的结构、运动、传质和反应特性;动态、非线性和非平衡特征;纳微流体颗粒的测试与表征;纳微气–液(水溶液)体系的羟基自由基检测及其新化学效应;以及纳微流体在反应强化方面的应用等.研究表明,纳微流体具有明显区别于宏观流体的理化特性,是一个极具挑战性的新兴领域,亟需进行深入研究和开发.在理论方面,需要在考虑动态、非平衡和尺度效应的基础上对经典的物理化学和平衡热力学的相关理论进行修正与拓展;在实验方面,需要设计和建立适用于纳微流体、动态、原位和多因子测试的仪器和表征系统;在应用方面,需要发明可大规模制备(10^(3)~10^(6)m^(3)h^(-1))和调控纳微颗粒尺度、特别是在大气液比(如5:1~100:1)情况下的纳微界面发生装置,同时开发面向千差万别应用场景的纳微流体反应器平台及操控系统.
The motion of particles in multiphase reaction systems and their physicochemical properties at the interfaces play a decisive role in molecular diffusion,energy transfer and reaction transformation,which in turn directly determines the energy and material consumption as well as intrinsic safety of the chemical reaction process.This paper briefly introduces some exploratory work carried out by our team and colleagues in the past 20 years in the area of nanomicron fluids and their interfacial properties and reaction intensification in multiphase reaction systems,including their intensification effects of mass transfer and reaction;the structure,motion,mass transfer and reaction properties of individual nano-micron bubble;dynamic,nonlinear,non-uniform and nonequilibrium characteristics;the testing and characterization of the fluids,the hydroxyl radical detection in nano-micron aqueous solution and their novel chemical effects;as well as applications of the fluids for reaction intensification.It is shown that nano-micron fluids with the physicochemical properties clearly different from those of macroscopic fluids are the emerging but very challenging field requiring intensive research and development.On the theoretical side,it is necessary to improve and extend theories of the classical physical chemistry and equilibrium thermodynamics with the consideration of the dynamic,nonequilibrium and scale effects.On the experimental side,it is crucial to design and establish instrumentation systems suitable for the in-situ detection and characterization of nano-micron fluids fluids.In terms of applications,it is important to invent nano-micron interfacial generators for preparing and regulating nano-micron fluids on a large scale(e.g.,10^(3)~10^(6)m^(3)h^(-1))at large gas-liquid ratio(e.g.,5:1100:1),and to develop nano-micron fluid reactor platforms and manipulation systems for a wide range of application scenarios.
作者
张志炳
李亚栋
张锁江
张涛
李灿
费维扬
曹湘洪
陈懿
Zhibing Zhang;Yadong Li;Suojiang Zhang;Tao Zhang;Can Li;Weiyang Fei;Xianghong Cao;Yi Chen(School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China;Department of Chemistry,Tsinghua University,Beijing 100084,China;Institute of Process Engineering,Chinese Academy of Science,Beijing 100190,China;Chinese Academy of Science,Beijing 100864,China;Dalian Institute of Chemical Physics,Chinese Academy of Science,Dalian I16023,China;Department of Chemical Engineering,Tsinghua University,Beijing 100084,China;China Petrochemical Corporation,Beijing 100728,China;Nanjing Yanchang Reaction Technology Research Institute Co.,Lid.,Nanjing 211500,China;Anhui Normal University,Wuhu 241000,China;Henan University,Zhengzhou 450046,China)
出处
《中国科学：化学》
CAS
CSCD
北大核心
2024年第1期3-20,共18页
SCIENTIA SINICA Chimica
基金
国家自然科学基金资助项目(编号:22278202)。
关键词
纳微流体
纳微气泡
自由基检测
传质
反应强化
nano-micron fluids
nano-micron bubble
hydroxyl radical detection
mass transfer
reaction intensification
作者简介
通讯作者:张志炳,zbzhang@nju.edu.cn;通讯作者:陈懿,chenyi@nju.edu.cn。
