Image-based method for in-situ monitoring of reaction kinetics

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-09-30 DOI:10.1016/j.ces.2025.122720

Hui-Long Wei , Xiao-Mei Ma , Jin-Zhou Qin , Yuan-Hai Su , Zheng-Hong Luo

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Abstract

A platform for in-situ monitoring of the kinetics of colorimetric reactions was established using an image-based method (IBM). Three reactions were selected for testing including a fast homogenous diazo coupling reaction, a slow homogenous reaction (the degradation of Rhodamine B), and a slow heterogenous diazo coupling reaction. Firstly, standard working curves were developed to correlate image gray values with component concentrations. The temporal evolution of component concentrations was then obtained in real-time by combining the high-speed camera and MATLAB software. Reaction kinetics parameters, including rate constants and activation energy, can be online-estimated through programming language. The comparison of the results obtained from IBM, high-performance liquid chromatography, and ultraviolet–visible spectrophotometry demonstrated that IBM can rapidly track concentration changes during the reaction process. Compared to conventional methods, IBM offers a simpler operation procedure, higher accuracy, and shorter sample analysis time.

Abstract Image

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基于图像的反应动力学现场监测方法

利用基于图像的方法（IBM）建立了一个比色反应动力学的现场监测平台。选择快速均相重氮偶联反应、慢速均相反应（罗丹明B的降解）和慢速非均相重氮偶联反应进行测试。首先，建立标准工作曲线，将图像灰度值与成分浓度关联起来；然后结合高速摄像机和MATLAB软件实时获取各组分浓度的时间演变。反应动力学参数，包括速率常数和活化能，可以通过编程语言在线估计。将IBM法、高效液相色谱法和紫外可见分光光度法得到的结果进行比较，表明IBM法可以快速跟踪反应过程中的浓度变化。与传统方法相比，IBM提供了更简单的操作程序，更高的准确性和更短的样品分析时间。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.