文献类型：期刊文献

中文题名：新型多级串联槽式光微反应器及其在光催化反应中的应用

英文题名：A New Multistage Consecutive Stirred-Tank Photo-Microreactor and Its Application in Photocatalytic Reaction

作者：曹晔[1];赵方[1];郭旭虹[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2021

卷号：47

期号：4

起止页码：387

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家自然科学基金-青年科学基金(21808059)。

语种：中文

中文关键词：光微反应器;固体处理;光催化反应;多级串联槽;TiO_(2)固体光催化剂;

外文关键词：photo-microreactor;solid manipulation;photocatalytic reaction;multistage consecutive tanks;TiO_(2) solid photocatalyst;

摘要：开发了一种新型光催化反应器-多级串联槽式光微反应器,其中包含16个串联的微型圆柱槽,每个单元槽内有一个微型搅拌子从而实现充分搅拌。停留时间分布测试结果表明:无论是均相液体物料,还是含有固体颗粒的悬浮液物料,在反应器中都能够实现接近平推流的流动状态。制作了透明度高、化学稳定性好的石英玻璃反应器,在反应器中进行TiO_(2)光催化降解染料的模型反应,运行10 h无堵塞现象发生,且反应速率相对于烧瓶中的间歇反应速率提高约24倍。
Performing photocatalysis in continuous microflow offers great advantages including uniform light distribution,high mass transfer rate and improved safety.Nevertheless,the solids that involved in photocatalytic reactions will possibly block the microreactor.A new photo-microreactor,multistage consecutive stirred-tank microreactor,is developed in this paper to manipulate solids occurring in photocatalytic reactions.The microreactor has 16 miniaturized stirred-tanks connected in series,each of which possesses a volume of 390μL and contains a micro stirred-bar.By applying a magnetic stirrer below the reactor,good mixing was achieved in each unit stirred-tank.The residence time distribution curves for both liquid single-phase flow and liquid-solid two-phase flow almost overlapped and exhibited satisfying symmetry,indicating solid particles were able to be suspended homogeneously in the flow in the new photo-microreactor.The degradation of methylene blue photo-catalyzed by TiO2 particles(about 400 nm)was conducted in a multistage consecutive stirred-tank microreactor made of glass.No clogging was observed during long time operation in the photo-microreactor(about 10 h).Moreover,the photocatalytic reaction rate was accelerated by about 24 times as compared to the batch reactor and the reaction rate was not slowed down as the content of TiO_(2)particles was decreased in the photo-microreactor.The multistage consecutive stirred-tank reactor developed in this work can be applied to photocatalytic reactions involving or not involving solids,and help to push forward the development of continuous microflow photocatalysis.