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CLC number: TK31

On-line Access: 2018-01-12

Received: 2017-05-05

Revision Accepted: 2017-07-24

Crosschecked: 2017-12-15

Cited: 1

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Citations:  Bibtex RefMan EndNote GB/T7714


Xue-cheng Wu


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Journal of Zhejiang University SCIENCE A 2018 Vol.19 No.1 P.86-94


In-situ characterization of gas-liquid precipitation reaction in a spray using rainbow refractometry

Author(s):  Xue-cheng Wu, Can Li, Jian-zheng Cao, Yong-xin Zhang, Ling-hong Chen, Gerard Grhan, Ke-fa Cen

Affiliation(s):  State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   chenlh@zju.edu.cn

Key Words:  Rainbow refractometry, In-situ characterization, Refractive index, Gas-liquid precipitation reaction

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Xue-cheng Wu, Can Li, Jian-zheng Cao, Yong-xin Zhang, Ling-hong Chen, Gerard Grhan, Ke-fa Cen. In-situ characterization of gas-liquid precipitation reaction in a spray using rainbow refractometry[J]. Journal of Zhejiang University Science A, 2018, 19(1): 86-94.

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author="Xue-cheng Wu, Can Li, Jian-zheng Cao, Yong-xin Zhang, Ling-hong Chen, Gerard Grhan, Ke-fa Cen",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T In-situ characterization of gas-liquid precipitation reaction in a spray using rainbow refractometry
%A Xue-cheng Wu
%A Can Li
%A Jian-zheng Cao
%A Yong-xin Zhang
%A Ling-hong Chen
%A Gerard Grhan
%A Ke-fa Cen
%J Journal of Zhejiang University SCIENCE A
%V 19
%N 1
%P 86-94
%@ 1673-565X
%D 2018
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1700240

T1 - In-situ characterization of gas-liquid precipitation reaction in a spray using rainbow refractometry
A1 - Xue-cheng Wu
A1 - Can Li
A1 - Jian-zheng Cao
A1 - Yong-xin Zhang
A1 - Ling-hong Chen
A1 - Gerard Grhan
A1 - Ke-fa Cen
J0 - Journal of Zhejiang University Science A
VL - 19
IS - 1
SP - 86
EP - 94
%@ 1673-565X
Y1 - 2018
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1700240

gas-liquid precipitation reactions in terms of a spray exist widely in energy, chemical, and environmental engineering. In this paper, a rainbow refractometry-based method is used to measure the reaction process of these spray-based gas-liquid precipitation reactions in a non-intrusive way. rainbow refractometry can simultaneously provide information on thermochemical and physical properties of droplets. A global rainbow measurement system was built to characterize a CO2 absorption reaction. Rainbow signals of spray droplets of Ca(OH)2 solutions before and after CO2 absorption were recorded and processed. Results indicated that the average refractive index of saturated H2O-Ca(OH)2 solution was 1.335 69, which accorded with the Abbe measurement. After the absorption reaction, the refractive index of droplets decreased to 1.335 17 which is close to that of water. The reaction extent was therefore reflected in the change of the refractive index of droplets. An extra experiment of CO2 absorbed by Ba(OH)2 solutions was conducted. The refractive index of droplets decreased with the reaction process, which acted well as an evolution indicator of the reaction. A heat transfer analysis of the reaction was also carried out. Due to the high heat dissipation performance of fine droplets, the temperature increase in the measurement volume was estimated to be less than 0.61 K, which has almost no effect on the measured results. The rainbow refractometry-based method shows good potential for in-situ characterization of a gas-liquid precipitation reaction.


创新点:1. 基于彩虹折射法,首次对气液吸收沉淀反应的原位表征进行探究;2. 通过若干实验和详细的传热计算分析,成功验证了其可行性和有效性.
方法:1. 通过与Abbe折射仪对比,确定全场彩虹测量的准确性(图3和公式(5));2. 搭建全局彩虹技术(GRT)测量系统进行喷雾测量实验(图2),并记录反应过程中的彩虹图像和离线采样液滴用于显微分析(图4和5);3. 对涉及到的气液吸收沉淀反应进行传热计算和分析(公式(7)~(13)).
结论:1. 初步表明了利用溶液折射率表征Ca(OH)2质量分数的可行性.2. 实验结果表明GRT的测量结果精确;反应后液滴折射率减少并趋向于水,反应进程可体现在彩虹角(即折射率)的变化上.3. 不同浓度Ba(OH)2吸收CO2的反应进一步证明了该方法原位表征气液吸收沉淀反应的可行性.4. 反应的传热计算和分析表明反应热所造成的温度升高可以忽略,验证了该方法的有效性.


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