Full Text:   <1547>

Summary:  <1368>

CLC number: TK31

On-line Access: 2018-01-12

Received: 2017-05-05

Revision Accepted: 2017-07-24

Crosschecked: 2017-12-15

Cited: 1

Clicked: 3314

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Xue-cheng Wu

https://orcid.org/0000-0001-9897-8776

-   Go to

Article info.
Open peer comments

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

http://doi.org/10.1631/jzus.A1700240


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 Gréhan, 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


Share this article to: More <<< Previous Article|

Xue-cheng Wu, Can Li, Jian-zheng Cao, Yong-xin Zhang, Ling-hong Chen, Gerard Gréhan, 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.

@article{title="In-situ characterization of gas-liquid precipitation reaction in a spray using rainbow refractometry",
author="Xue-cheng Wu, Can Li, Jian-zheng Cao, Yong-xin Zhang, Ling-hong Chen, Gerard Gréhan, Ke-fa Cen",
journal="Journal of Zhejiang University Science A",
volume="19",
number="1",
pages="86-94",
year="2018",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1700240"
}

%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 Gréhan
%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

TY - JOUR
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 Gréhan
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


Abstract: 
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.

彩虹折射法对喷雾气液沉淀反应的原位表征

目的:喷雾气液吸收化学反应广泛存在于能源、化学和环境工程中.比如在能源环境领域,湿法烟气脱硫(WFGD)中的碱性喷雾吸收脱除气体污染物,乙醇胺(MEA)吸收脱除CO2酸性气体.对这类反应的表征,有利于控制和改善污染物脱除效率.本文尝试利用气液吸收沉淀反应过程中液滴折射率的变化来原位表征反应进程.
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.

关键词:彩虹折射法;原位表征;折射率;气液吸收沉淀反应

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]Gao X, Huo W, Luo, ZY, et al., 2008. CFD simulation with enhancement factor of sulfur dioxide absorption in the spray scrubber. Journal of Zhejiang University-SCIENCE A, 9(11):1601-1613.

[2]Gao X, Guo RT, Ding HL, et al., 2009. Absorption of NO2 into Na2S solution in a stirred tank reactor. Journal of Zhejiang University-SCIENCE A, 10(3):434-438.

[3]Haghnegahdar MR, Rahimi A, Hatamipour MS, 2011. A rate equation for Ca(OH)2 and CO2 reaction in a spouted bed reactor at low gas concentrations. Chemical Engineering Research and Design, 89(6):616-620.

[4]Letty C, Renou B, Reveillon J, et al., 2013. Experimental study of droplet temperature in a two-phase heptane/air V-flame. Combustion and Flame, 160(9):1803-1811.

[5]Li H, Rosebrock CD, Wriedt T, et al., 2017. The effect of initial diameter on rainbow positions and temperature distributions of burning single-component n-alkane droplets. Journal of Quantitative Spectroscopy and Radiative Transfer, 195:164-175.

[6]Lohner H, Lehmann P, Bauckhage K, 1999. Detection based on rainbow refractometry of droplet sphericity in liquid– liquid systems. Applied Optics, 38(7):1127-1132.

[7]Nussenzveig H, 1969. High-frequency scattering by a transparent sphere. II. Theory of the rainbow and the glory. Journal of Mathematical Physics, 10(1):125-176.

[8]Ouboukhlik M, Saengkaew S, Fournier-Salaün MC, et al., 2015a. Local measurement of mass transfer in a reactive spray for CO2 capture. The Canadian Journal of Chemical Engineering, 93(2):419-426.

[9]Ouboukhlik M, Godard G, Saengkaew S, et al., 2015b. Mass transfer evolution in a reactive spray during carbon dioxide capture. Chemical Engineering & Technology, 38(7):1154-1164.

[10]Promvongsa J, Vallikul P, Fungtammasan B, et al., 2017. Multicomponent fuel droplet evaporation using 1D global rainbow technique. Proceedings of the Combustion Institute, 36(2):2401-2408.

[11]Quan X, Fry ES, 1995. Empirical equation for the index of refraction of seawater. Applied Optics, 34(18):3477-3480.

[12]Rosebrock CD, Shirinzadeh S, Soeken M, et al., 2016. Time-resolved detection of diffusion limited temperature gradients inside single isolated burning droplets using rainbow refractometry. Combustion and Flame, 168:255-269.

[13]Roth N, Anders K, Frohn A, 1990. Simultaneous measurement of temperature and size of droplets in the micrometer range. Journal of Laser Applications, 2(1):37-42.

[14]Saengkaew S, 2005. Study of Spray Heat Up: on the Development of Global Rainbow Techniques. PhD Thesis, Rouen University, Rouen, France.

[15]Saengkaew S, Charinpanitkul T, Vanisri H, et al., 2006. Rainbow refractrometry: on the validity domain of Airy’s and Nussenzveig’s theories. Optics Communications, 259(1):7-13.

[16]Saengkaew S, Charinpanitkul T, Vanisri H, et al., 2007. Rainbow refractrometry on particles with radial refractive index gradients. Experiments in Fluids, 43(4):595-601.

[17]Saengkaew S, Godard G, Blaisot J, et al., 2009. Experimental analysis of global rainbow technique: sensitivity of temperature and size distribution measurements to non-spherical droplets. Experiments in Fluids, 47:839-848.

[18]Song F, Xu C, Wang S, et al., 2016. Measurement of temperature gradient in a heated liquid cylinder using rainbow refractometry assisted with infrared thermometry. Optics Communications, 380:179-185.

[19]van Beeck J, Riethmuller M, 1996. Rainbow phenomena applied to the measurement of droplet size and velocity and to the detection of nonsphericity. Applied Optics, 35(13):2259-2266.

[20]van Beeck J, Giannoulis D, Zimmer L, et al., 1999. Global rainbow thermometry for droplet-temperature measurement. Optics Letters, 24(23):1696-1698.

[21]Verdier A, Santiago JM, Vandel A, et al., 2016. Experimental study of local flame structures and fuel droplet properties of a spray jet flame. Proceedings of the Combustion Institute, 36(2):2595-2602.

[22]Whitaker S, 1972. Forced convection heat transfer correlations for flow in pipes, past flat plates, single cylinders, single spheres, and for flow in packed beds and tube bundles. AIChE Journal, 18(2):361-371.

[23]Wilms J, Weigand B, 2007. Composition measurements of binary mixture droplets by rainbow refractometry. Applied Optics, 46(11):2109-2118.

[24]Wu X, Wu Y, Saengkaew S, et al., 2012. Concentration and composition measurement of sprays with a global rainbow technique. Measurement Science and Technology, 23(12):125302.

[25]Wu X, Jiang H, Wu Y, et al., 2014. One-dimensional rainbow thermometry system by using slit apertures. Optics Letters, 39(3):638-641.

[26]Wu X, Li C, Jiang H, et al., 2017. Measurement error of global rainbow technique: the effect of recording parameters. Optics Communications, 402:311-318.

[27]Yu H, Xu F, Tropea C, 2013a. Optical caustics associated with the primary rainbow of oblate droplets: simulation and application in non-sphericity measurement. Optics Express, 21(22):25761-25771.

[28]Yu H, Xu F, Tropea C, 2013b. Simulation of optical caustics associated with the secondary rainbow of oblate droplets. Optics Letters, 38(21):4469-4472.

[29]Zhao Y, Qiu H, 2006. Measurements of multicomponent microdroplet evaporation by using rainbow refractometer and PDA. Experiments in Fluids, 40(1):60-69.

[30]Zumdahl, SS, 2009. Chemical Principles. Houghton Mifflin Company, Boston, USA.

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2022 Journal of Zhejiang University-SCIENCE