Investigation on global and local RTD, mixing, and heat transfer of a high‐throughput passive chaotic microreactor

IF 4 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2025-10-09 DOI:10.1002/aic.70085

Shi‐Xiao Wei, Ying Liu, Ting‐Liang Xie, Shuang‐Feng Yin

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引用次数: 0

Abstract

Understanding residence time distribution (RTD) and mass/heat performance is crucial for microreactor design and optimization. This study investigates global and local RTD in a chaotic microreactor using computational fluid dynamics (CFD) simulations and experiments, and a new RTD model is established. Global RTD analysis indicates that higher flow rates reduce channeling and stagnant flows, decreasing RTD variance by 80.7% within the range of 5–20 mL/min. Local RTD analysis reveals continuous stirred tank reactor (CSTR)‐like mixing characteristics within individual stages, enabling rapid homogenization. Enhanced chaotic mixing reduces micromixing time by four orders of magnitude at high flow rates, and significantly improves heat transfer, with an increase in Nusselt number of 220.7%. Optimized RTD and intensified chaotic mixing collectively establish a spatiotemporally uniform reaction environment, enabling high‐throughput synthesis of Mn0.75Ni0.25CO3 microparticles with a uniform size distribution (σ = 0.36 μm), demonstrating scalable synthesis potential.

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高通量无源混沌微反应器的整体和局部RTD、混合和传热研究

了解停留时间分布（RTD）和质量/热性能对微反应器的设计和优化至关重要。本文采用计算流体动力学（CFD）方法对混沌微反应器中的全局和局部RTD进行了模拟和实验研究，并建立了一个新的RTD模型。全球RTD分析表明，较高的流量减少了窜流和滞流，在5-20 mL/min范围内，RTD方差降低了80.7%。局部RTD分析揭示了单个阶段的连续搅拌槽式反应器（CSTR）的混合特性，使快速均质化成为可能。在高流速下，增强的混沌混合将微混合时间缩短了4个数量级，并显著改善了换热，努塞尔数增加了220.7%。优化的RTD和强化的混沌混合共同建立了一个时空均匀的反应环境，实现了高通量合成具有均匀尺寸分布（σ = 0.36 μm）的Mn0.75Ni0.25CO3微粒，显示了可扩展的合成潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.