Mass transfer performance of CO2/N2 mixture absorption into monoethanolamine aqueous solution in microchannel

doi:10.11949/j.issn.0438-1157.20160902

Abstract

Abstract:

A high speed camera was used to investigate the gas-liquid two-phase flow and mass transfer performance of CO₂/N₂ gas mixture absorption into monoethanolamine (MEA) aqueous solution in a 400 μm×400 μm T-shape microchannel. The pressure drop along the microchannel was determined by a pressure sensor. The effects of the gas and liquid phase flow rates, MEA concentration on the pressure drop, specific surface area and mass transfer performance were investigated experimentally. The results showed that for a given concentration of MEA aqueous solution, the pressure drop, the mass transfer coefficient, the specific interfacial area, the volumetric mass transfer coefficient and the enhancement factor increased gradually up to a constant value with increasing gas phase or liquid phase flow rates. With increasing MEA concentration or the pressure drop, the mass transfer coefficient, the volumetric mass transfer coefficient and the enhancement factor increased, but the specific interfacial area decreased. Under experimental conditions, the range of pressure drop was 2.00 to 5.23 kPa and the mass transfer coefficient of gas-liquid two-phase flow accompanied with chemical absorption was ranged from 7.74×10^-4 to 2.97×10^-3 m·s^-1. A correlation for predicting the volumetric mass transfer coefficient was proposed by taking Sherwood number, Reynolds number, Schmidt number and the enhancement factor into account. The average deviation of the model was 5.09%, indicating a good prediction performance.

Key words: microchannel, carbon dioxide, gas-liquid two-phase flow, chemical absorption, mass transfer, enhancement factor

摘要：

采用高速摄像仪对400 μm×400 μm T形微通道内单乙醇胺（MEA）水溶液吸收混合气中CO₂过程的气液两相流及传质特性进行了实验研究，微通道内的压力降采用压力传感器进行测量。考察了弹状流型下气液两相流量及MEA浓度对压力降、比表面积和传质性能的影响。结果表明，当MEA浓度不变，气液两相流量增大时，压力降、比表面积、传质系数、体积传质系数和增强因子均增大，并逐渐趋于恒定。当气液流量不变，MEA浓度增大时，压力降、传质系数、体积传质系数和增强因子增大，但比表面积减小。实验条件下，压力降范围为2.00~5.23 kPa，化学吸收过程的传质系数范围为7.74×10^-4~2.97×10^-3 m·s^-1。对于伴有快速化学反应的传质过程，以Sherwood数、Reynolds数、Schmidt数及增强因子为变量建立了体积传质系数的预测关联式，平均偏差为5.09%，具有良好的预测性能。

关键词: 微通道, 二氧化碳, 气液两相流, 化学吸收, 传质, 增强因子

CLC Number:

TQ021.4

JIANG Shan, ZHU Chunying, ZHANG Fanbin, MA Youguang. Mass transfer performance of CO₂/N₂ mixture absorption into monoethanolamine aqueous solution in microchannel[J]. CIESC Journal, 2017, 68(2): 643-652.

姜山, 朱春英, 张璠玢, 马友光. 微通道内单乙醇胺水溶液吸收CO₂/N₂混合气的传质特性[J]. 化工学报, 2017, 68(2): 643-652.

References 29

[1]	陈光文, 赵玉潮, 乐军, 等. 微化工过程中的传递现象[J]. 化工学报, 2013, 64(1):63-75. CHEN G W, ZHAO Y C, YUE J, et al. Transport phenomena in micro-chemical engineering[J]. CIESC Journal, 2013, 64(1):63-75.
[2]	FU T T, MA Y G, FUNFSCHILLING D, et al. Breakup dynamics of slender bubbles in non-Newtonian fluids in microfluidic flow-focusing devices[J]. AIChE Journal, 2012, 58(11):3560-3567.
[3]	TAN J, ZHANG J S, LU Y C, et al. Process intensification of catalytic hydrogenation of ethylanthraquinone with gas-liquid microdispersion[J]. AIChE Journal, 2012, 58(5):1326-1335.
[4]	白璐, 朱春英, 付涛涛, 等. 并行微通道内气液相分配规律[J]. 化工学报, 2014, 65(1):108-115. BAI L, ZHU C Y, FU T T, et al. Gas-liquid flow distribution of parallel microchannels[J]. CIESC Journal, 2014, 65(1):108-115.
[5]	张沁丹, 付涛涛, 朱春英, 等. 十字聚焦型微通道内弹状液滴在黏弹性流体中的生成与尺寸预测[J]. 化工学报, 2016, 67(2):504-511. ZHANG Q D, FU T T, ZHU C Y, et al. Formation and size prediction of slug droplet in viscoelastic fluid in flow-focusing microchannel[J]. CIESC Journal, 2016, 67(2):504-511.
[6]	YUE J, CHEN G W, YUAN Q, et al. Hydrodynamics and mass transfer characteristics in gas-liquid flow through a rectangular microchannel[J]. Chemical Engineering Science, 2007, 62(7):2096-2108.
[7]	ZHENG C, ZHAO B C, WANG K, et al. Determination of kinetics of CO2 absorption in solutions of 2-amino-2-methyl-1-propanol using a microfluidic technique[J]. AIChE Journal, 2015, 61(12):4358-4366.
[8]	SHAKERIAN F, KIM K H, SZULEJKO J E, et al. A comparative review between amines and ammonia as sorptive media for post-combustion CO2 capture[J]. Applied Energy, 2015, 148:10-22.
[9]	YE C B, CHEN G W, YUAN Q. Process characteristics of CO2 absorption by aqueous monoethanolamine in a microchannel reactor[J]. Chinese Journal of Chemical Engineering, 2012, 20(1):111-119.
[10]	VAN BATEN J M, KRISHNA R. CFD simulations of mass transfer from Taylor bubbles rising in circular capillaries[J]. Chemical Engineering Science, 2004, 59(12):2535-2545.
[11]	PAN Z Q, ZHANG X B, XIE Y F, et al. Instantaneous mass transfer under gas-liquid Taylor flow in circular capillaries[J]. Chemical Engineering & Technology, 2014, 37(3):495-504.
[12]	ZHU C Y, LI C F, GAO X Q, et al. Taylor flow and mass transfer of CO2 chemical absorption into MEA aqueous solutions in a T-junction microchannel[J]. International Journal of Heat and Mass Transfer, 2014, 73:492-499.
[13]	SHAO N, GAVRIILIDIS A, ANGELI P. Mass transfer during Taylor flow in microchannels with and without chemical reaction[J]. Chemical Engineering Journal, 2010, 160(3):873-881.
[14]	LUO R, WANG L. Liquid velocity distribution in slug flow in a microchannel[J]. Microfluidics and Nanofluidics, 2012, 12(1/2/3/4):581-595.
[15]	VERSTEEG G F, VAN SWAALJ W. Solubility and diffusivity of acid gases (CO2, N2O) in aqueous alkanolamine solutions[J]. Journal of Chemical and Engineering Data, 1988, 33(1):29-34.
[16]	DANCKWERTS P V, LANNUS A. Gas-liquid reactions[J]. Journal of the Electrochemical Society, 1970, 117(10):369C-370C.
[17]	TAMIMI A, RINKER E B, SANDALL O C. Diffusion coefficients for hydrogen sulfide, carbon dioxide, and nitrous oxide in water over the temperature range 293-368 K[J]. Journal of Chemical and Engineering Data, 1994, 39(2):330-332.
[18]	FU T T, MA Y G, FUNFSCHILLING D, et al. Gas-liquid flow stability and bubble formation in non-Newtonian fluids in microfluidic flow-focusing devices[J]. Microfluidics and Nanofluidics, 2011, 10(5):1135-1140.
[19]	KASHID M N, AGAR D W, TUREK S. CFD modelling of mass transfer with and without chemical reaction in the liquid-liquid slug flow microreactor[J]. Chemical Engineering Science, 2007, 62(18/19/20):5102-5109.
[20]	YUE J, LUO L A, GONTHIER Y, et al. An experimental study of air-water Taylor flow and mass transfer inside square microchannels[J]. Chemical Engineering Science, 2009, 64(16):3697-3708.
[21]	LI C F, ZHU C Y, MA Y G, et al. Experimental study on volumetric mass transfer coefficient of CO2 absorption into MEA aqueous solution in a rectangular microchannel reactor[J]. International Journal of Heat and Mass Transfer, 2014, 78:1055-1059.
[22]	YAO C Q, DONG Z Y, ZHAO Y C, et al. Gas-liquid flow and mass transfer in a microchannel under elevated pressures[J]. Chemical Engineering Science, 2015, 123:137-145.
[23]	WHITMAN W G. The two film theory of gas absorption[J]. International Journal of Heat and Mass Transfer, 1962, 5(5):429-433.
[24]	YANG L, TAN J, WANG K, et al. Mass transfer characteristics of bubbly flow in microchannels[J]. Chemical Engineering Science, 2014, 109:306-314.
[25]	CHARPENTIER J-C. Mass-transfer rates in gas-liquid absorbers and reactors[J]. Advances in Chemical Engineering, 1981, 11:1-133.
[26]	DLUSKA E, WRONSKI S, RYSZCZUK T. Interfacial area in gas-liquid Couette-Taylor flow reactor[J]. Experimental Thermal and Fluid Science, 2004, 28(5):467-472.
[27]	TAN J, LÜ Y C, XU J H, et al. Mass transfer characteristic in the formation stage of gas-liquid segmented flow in microchannel[J]. Chemical Engineering Journal, 2012, 185/186:314-320.
[28]	NIU H N, PAN L W, SU H J, et al. Flow pattern, pressure drop, and mass transfer in a gas-liquid concurrent two-phase flow microchannel reactor[J]. Industrial & Engineering Chemistry Research, 2009, 48(3):1621-1628.
[29]	GANAPATHY H, SHOOSHTARI A, DESSIATOUN S, et al. Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes[J]. Chemical Engineering Journal, 2015, 266:258-270.

Mass transfer performance of CO₂/N₂ mixture absorption into monoethanolamine aqueous solution in microchannel

微通道内单乙醇胺水溶液吸收CO₂/N₂混合气的传质特性

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References 29

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Yifei ZHANG, Fangchen LIU, Shuangxing ZHANG, Wenjing DU. Performance analysis of printed circuit heat exchanger for supercritical carbon dioxide [J]. CIESC Journal, 2023, 74(S1): 183-190.
[2]	He JIANG, Junfei YUAN, Lin WANG, Guyu XING. Experimental study on the effect of flow sharing cavity structure on phase change flow characteristics in microchannels [J]. CIESC Journal, 2023, 74(S1): 235-244.
[3]	Jingwei CHAO, Jiaxing XU, Tingxian LI. Investigation on the heating performance of the tube-free-evaporation based sorption thermal battery [J]. CIESC Journal, 2023, 74(S1): 302-310.
[4]	Ruitao SONG, Pai WANG, Yunpeng WANG, Minxia LI, Chaobin DANG, Zhenguo CHEN, Huan TONG, Jiaqi ZHOU. Numerical simulation of flow boiling heat transfer in pipe arrays of carbon dioxide direct evaporation ice field [J]. CIESC Journal, 2023, 74(S1): 96-103.
[5]	Yitong LI, Hang GUO, Hao CHEN, Fang YE. Study on operating conditions of proton exchange membrane fuel cells with non-uniform catalyst distributions [J]. CIESC Journal, 2023, 74(9): 3831-3840.
[6]	Yepin CHENG, Daqing HU, Yisha XU, Huayan LIU, Hanfeng LU, Guokai CUI. Application of ionic liquid-based deep eutectic solvents for CO₂ conversion [J]. CIESC Journal, 2023, 74(9): 3640-3653.
[7]	Wenzhu LIU, Heming YUN, Baoxue WANG, Mingzhe HU, Chonglong ZHONG. Research on topology optimization of microchannel based on field synergy and entransy dissipation [J]. CIESC Journal, 2023, 74(8): 3329-3341.
[8]	Rui HONG, Baoqiang YUAN, Wenjing DU. Analysis on mechanism of heat transfer deterioration of supercritical carbon dioxide in vertical upward tube [J]. CIESC Journal, 2023, 74(8): 3309-3319.
[9]	Qiyu ZHANG, Lijun GAO, Yuhang SU, Xiaobo MA, Yicheng WANG, Yating ZHANG, Chao HU. Recent advances in carbon-based catalysts for electrochemical reduction of carbon dioxide [J]. CIESC Journal, 2023, 74(7): 2753-2772.
[10]	Qichao LIU, Yunlong ZHOU, Cong CHEN. Analysis and calculation of void fraction of gas-liquid two-phase flow in vertical riser under fluctuating vibration [J]. CIESC Journal, 2023, 74(6): 2391-2403.
[11]	Yuanyuan ZHANG, Jiangyuan QU, Xinxin SU, Jing YANG, Kai ZHANG. Gas-liquid mass transfer and reaction characteristics of SNCR denitration in CFB coal-fired unit [J]. CIESC Journal, 2023, 74(6): 2404-2415.
[12]	Chenxi LI, Yongfeng LIU, Lu ZHANG, Haifeng LIU, Jin’ou SONG, Xu HE. Quantum chemical analysis of n-heptane combustion mechanism under O₂/CO₂ atmosphere [J]. CIESC Journal, 2023, 74(5): 2157-2169.
[13]	Caihong LIN, Li WANG, Yu WU, Peng LIU, Jiangfeng YANG, Jinping LI. Effect of alkali cations in zeolites on adsorption and separation of CO₂/N₂O [J]. CIESC Journal, 2023, 74(5): 2013-2021.
[14]	Hao WANG, Siyang TANG, Shan ZHONG, Bin LIANG. An investigation of the enhancing effect of solid particle surface on the CO₂ desorption behavior in chemical sorption process with MEA solution [J]. CIESC Journal, 2023, 74(4): 1539-1548.
[15]	Zhiguang QIAN, Yue FAN, Shixue WANG, Like YUE, Jinshan WANG, Yu ZHU. Effect of purging conditions on the impedance relaxation phenomenon and low temperature start-up of PEMFC [J]. CIESC Journal, 2023, 74(3): 1286-1293.