缩口T型微通道内纳米流体吸收CO2的流动与传质研究

doi:10.11949/0438-1157.20230601

摘要/Abstract

摘要：

构建了一种气相缩口的T型微通道，研究了二氧化硅(SiO₂)纳米流体吸收CO₂过程的气液两相流动与传质性能。在实验范围内，观察到了泡状流、串珠流、紧密弹状流和弹状-环状流。随着气相流速的增加，泡状流的气泡生成频率f和比表面积a快速增大，串珠流的f和a变化很小，紧密弹状流的f和a逐渐减小。随着连续相和分散相流速的增大以及纳米颗粒浓度的升高，液侧体积传质系数均表现出增大的趋势。与等宽T型通道相比，缩口T型微通道的最大比表面积增幅达29.6%。结果表明气相入口的缩径效应可有效提高气液两相流的传质面积，有利于气液传质性能的改善和提高。

关键词: 二氧化碳捕集, 纳米流体, 微通道, 传质, 过程强化

Abstract:

A gas-phase necked T-shaped microchannel was constructed, and the gas-liquid two-phase flow and mass transfer performance of silicon dioxide (SiO₂) nanofluids in the process of CO₂ absorption were studied. In the experimental range, the bubbly flow, beaded bubble flow, compact slug flow, and slug-annular flow were observed. With the increase of gas phase flow rate, the bubble formation frequency f and the specific surface area a of bubbly flow increase rapidly, f and a of beaded bubble flow change little, and f and a of compact slug flow gradually decrease. Moreover, the liquid-phase volumetric mass transfer coefficient showed an increasing trend with the rise of the flow rate of both continuous and dispersed phases and the nanoparticle concentration in the liquid. Compared to the equal width T-channel, the maximal specific surface area of the microchannel with the narrow gas-phase inlet increased by 29.6%. It is shown that the reduction effect of gas phase inlet can effectively increase the mass transfer area of gas-liquid two-phase flow, which is conducive to the improvement of gas-liquid mass transfer performance.

Key words: CO₂ capture, nanofluids, microchannel, mass transfer, process enhancement

中图分类号:

TQ 021.4

赵若晗, 黄蒙蒙, 朱春英, 付涛涛, 高习群, 马友光. 缩口T型微通道内纳米流体吸收CO₂的流动与传质研究[J]. 化工学报, 2024, 75(1): 221-230.

Ruohan ZHAO, Mengmeng HUANG, Chunying ZHU, Taotao FU, Xiqun GAO, Youguang MA. Flow and mass transfer study of CO₂ absorption by nanofluid in T-shaped microchannels[J]. CIESC Journal, 2024, 75(1): 221-230.

图/表 10

图1 实验装置示意图

Fig.1 Schematic diagram of experimental device

表1 二氧化硅浆料的物理性质

Table 1 Physical properties of silica slurry

SiO₂浓度/ %(质量)

流体密度

ρ/(kg·m^-3)

流体黏度

μ/(mPa·s)

表面张力

σ/(mN·m^-1)

图2 不同流型气泡形成过程演变图[QL = 2.67 ml·min-1,w(SiO2)=10%]

Fig.2 Evolution of bubble formation process for different flow regimes[QL=2.67 ml·min-1, w(SiO2)=10%]

图3 微通道内气液两相流型

Fig.3 Gas-liquid two-phase flow pattern in the microchannel

图4 气泡生成长度随气相流量的变化规律[QL =2.67 ml·min-1，w(SiO2)=20%]

Fig.4 Variation of bubble formation length with gas phase flow rate [QL=2.67 ml·min-1, w(SiO2)=20%]

图5 微通道内气液流型■泡状流;●串珠流;▲紧密弹状流;▼弹状-环状流; ——泡状流与串珠流的转换线;—·—串珠流与紧密弹状流的转换线; — — — 紧密弹状流与弹状-环状流的转换线

Fig.5 Gas-liquid flow regime in the microchannel■bubbly flow; ●beaded bubble flow;▲compact slug flow; ▼slug-annular flow; —— conversion line between bubbly flow and beaded bubble flow; —·— conversion line between beaded bubble flow and compact slug flow; — — — conversion line between compact slug flow and slug-annular flow

图6 通道内压力降随操作条件的变化规律[w(SiO2)=10%]

Fig.6 Variation of pressure drop in microchannel with operating conditions [w(SiO2)=10%]

图7 气泡生成频率随操作条件的变化规律[w(SiO2)=10%]

Fig.7 Variation of bubble generation frequency with operating conditions [w(SiO2)=10%]

图8 比面积随操作条件的变化[w(SiO2)=10%]

Fig.8 Variation of specific area with operating conditions [w(SiO2)=10%]

图9 液侧体积传质系数随操作条件的变化（空心符号代表泡状流，实心符号代表串珠流，半实心符号代表紧密弹状流）

Fig.9 Variation of liquid side volumetric mass transfer coefficient with operating conditions(hollow symbols represent bubbly flow, solid symbols represent beaded bubble flow, and semi-solid symbols represent compact slug flow)

参考文献 47

1	Tiwari S C, Bhardwaj A, Nigam K D P, et al. A strategy of development and selection of absorbent for efficient CO₂ capture: an overview of properties and performance[J]. Process Safety and Environmental Protection, 2022, 163: 244-273.
2	Sheng L, Wang K, Deng J, et al. Gas-liquid microdispersion and microflow for carbon dioxide absorption and utilization: a review[J]. Current Opinion in Chemical Engineering, 2023, 40: 100917.
3	张雪婷, 胡激江, 赵晶, 等. 高分子量聚丙二醇在微通道反应器中的制备[J]. 化工学报, 2023, 74(3): 1343-1351.
	Zhang X T, Hu J J, Zhao J, et al. Preparation of high molecular weight polypropylene glycol in microchannel reactor[J]. CIESC Journal, 2023, 74(3): 1343-1351.
4	尧超群, 陈光文, 袁权. 微通道内气-液两相传质过程行为及其应用[J]. 化工学报, 2019, 70(10): 3635-3644.
	Yao C Q, Chen G W, Yuan Q. Mass transfer characteristics of gas-liquid two-phase flow in microchannels and applications[J]. CIESC Journal, 2019, 70(10): 3635-3644.
5	Huang M M, Zhu C Y, Fu T T, et al. Enhancement of gas-liquid mass transfer by nanofluids in a microchannel under Taylor flow regime[J]. International Journal of Heat and Mass Transfer, 2021, 176: 121435.
6	Yao C Q, Zhao Y C, Ma H Y, et al. Two-phase flow and mass transfer in microchannels: a review from local mechanism to global models[J]. Chemical Engineering Science, 2021, 229: 116017.
7	郭戎威, 付涛涛, 朱春英, 等. 微通道内气-液两相流及并行放大的研究进展[J]. 化学工业与工程, 2021, 38(6): 74-86.
	Guo R W, Fu T T, Zhu C Y, et al. Research progress on gas-liquid two-phase flow and numbering-up strategy in microchannel[J]. Chemical Industry and Engineering, 2021, 38(6):74-86.
8	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.
9	何万媛, 陈一宇, 朱春英, 等. 阵列凸起微通道内气液两相传质特性研究[J]. 化工学报, 2023, 74(2): 690-697.
	He W Y, Chen Y Y, Zhu C Y, et al. Study on gas-liquid mass transfer characteristics in microchannel with array bulges[J]. CIESC Journal, 2023, 74(2): 690-697.
10	Rzehak R. Modeling of mass-transfer in bubbly flows encompassing different mechanisms[J]. Chemical Engineering Science, 2016, 151: 139-143.
11	Sheng L, Chang Y, Wang J J, et al. Remarkable improvement of gas-liquid mass transfer by modifying the structure of conventional T-junction microchannel[J]. AIChE Journal, 2023, 69(7): 18089.
12	Chen Y C, Sheng L, Deng J, et al. Geometric effect on gas-liquid bubbly flow in capillary-embedded T-junction microchannels[J]. Industrial & Engineering Chemistry Research, 2021, 60(12): 4735-4744.
13	Wang Z H, Ding W B, Fan Y W, et al. Design of improved flow-focusing microchannel with constricted continuous phase inlet and study of fluid flow characteristics[J]. Micromachines, 2022, 13(10): 1776.
14	Keblinski P, Phillpot S R, Choi S U S, et al. Mechanisms of heat flow in suspensions of nano-sized particles (nanofluids)[J]. International Journal of Heat and Mass Transfer, 2002, 45(4): 855-863.
15	Darvanjooghi M H K, Esfahany M N, Esmaeili-Faraj S H. Investigation of the effects of nanoparticle size on CO₂ absorption by silica-water nanofluid[J]. Separation and Purification Technology, 2018, 195: 208-215.
16	Yu W, Wang T, Park A H A, et al. Review of liquid nano-absorbents for enhanced CO₂ capture[J]. Nanoscale, 2019, 11(37): 17137-17156.
17	Valeh-e-Sheyda P, Afshari A. A detailed screening on the mass transfer modeling of the CO₂ absorption utilizing silica nanofluid in a wetted wall column[J]. Process Safety and Environmental Protection, 2019, 127: 125-132.
18	Thulasidas T C, Abraham M A, Cerro R L. Bubble-train flow in capillaries of circular and square cross section[J]. Chemical Engineering Science, 1995, 50(2): 183-199.
19	Fries D M, Trachsel F, von Rohr P R. Segmented gas-liquid flow characterization in rectangular microchannels[J]. International Journal of Multiphase Flow, 2008, 34(12): 1108-1118.
20	Wu Y N, Fu T T, Zhu C Y, et al. Asymmetrical breakup of bubbles at a microfluidic T-junction divergence: feedback effect of bubble collision[J]. Microfluidics and Nanofluidics, 2012, 13(5): 723-733.
21	van Steijn V, Kleijn C R, Kreutzer M T. Flows around confined bubbles and their importance in triggering pinch-off[J]. Physical Review Letters, 2009, 103(21): 214501.
22	Piroird K, Lorenceau É. Capillary flow of oil in a single foam microchannel[J]. Physical Review Letters, 2013, 111(23): 234503.
23	Cai W F, Zhang J, Zhang X B, et al. Enhancement of CO₂ absorption under Taylor flow in the presence of fine particles[J]. Chinese Journal of Chemical Engineering, 2013, 21(2): 135-143.
24	Kluytmans J H J, van Wachem B G M, Kuster B F M, et al. Mass transfer in sparged and stirred reactors: influence of carbon particles and electrolyte[J]. Chemical Engineering Science, 2003, 58(20): 4719-4728.
25	Vandu C O, Liu H, Krishna R. Mass transfer from Taylor bubbles rising in single capillaries[J]. Chemical Engineering Science, 2005, 60(22): 6430-6437.
26	Rettich T R, Battino R, Wilhelm E. Solubility of gases in liquids. ⅩⅥ. Henry’s law coefficients for nitrogen in water at 5 to 50℃[J]. Journal of Solution Chemistry, 1984, 13(5): 335-348.
27	Abiev R S. Simulation of the slug flow of a gas-liquid system in capillaries[J]. Theoretical Foundations of Chemical Engineering, 2008, 42(2): 105-117.
28	Abiev R S. Modeling of pressure losses for the slug flow of a gas-liquid mixture in mini- and microchannels[J]. Theoretical Foundations of Chemical Engineering, 2011, 45(2): 156-163.
29	Kreutzer M T, Kapteijn F, Moulijn J A, et al. Multiphase monolith reactors: chemical reaction engineering of segmented flow in microchannels[J]. Chemical Engineering Science, 2005, 60(22): 5895-5916.
30	Sheng L, Chen Y C, Deng J, et al. High-frequency formation of bubble with short length in a capillary embedded step T-junction microdevice[J]. AIChE Journal, 2021, 67(11): 17376.
31	Wang K, Lu Y C, Xu J H, et al. Generation of micromonodispersed droplets and bubbles in the capillary embedded T-junction microfluidic devices[J]. AIChE Journal, 2011, 57(2): 299-306.
32	Xu J H, Li S W, Wang Y J, et al. Controllable gas-liquid phase flow patterns and monodisperse microbubbles in a microfluidic T-junction device[J]. Applied Physics Letters, 2006, 88(13): 133506.
33	Sheng L, Ma L, Chen Y C, et al. A comprehensive study of droplet formation in a capillary embedded step T-junction: from squeezing to jetting[J]. Chemical Engineering Journal, 2022, 427: 132067.
34	Zhao Y C, Chen G W, Ye C B, et al. Gas-liquid two-phase flow in microchannel at elevated pressure[J]. Chemical Engineering Science, 2013, 87: 122-132.
35	Zhu C Y, Lu Y T, Fu T T, et al. Experimental investigation on gas-liquid mass transfer with fast chemical reaction in microchannel[J]. International Journal of Heat and Mass Transfer, 2017, 114: 83-89.
36	Ma D F, Zhu C Y, Fu T T, et al. Synergistic effect of functionalized ionic liquid and alkanolamines mixed solution on enhancing the mass transfer of CO₂ absorption in microchannel[J]. Chemical Engineering Journal, 2021, 417: 129302.
37	Korczyk P M, van Steijn V, Blonski S, et al. Accounting for corner flow unifies the understanding of droplet formation in microfluidic channels[J]. Nature Communications, 2019, 10: 2528.
38	Haase S. Characterisation of gas-liquid two-phase flow in minichannels with co-flowing fluid injection inside the channel (Ⅱ): Gas bubble and liquid slug lengths, film thickness, and void fraction within Taylor flow[J]. International Journal of Multiphase Flow, 2017, 88: 251-269.
39	Salman W, Gavriilidis A, Angeli P. On the formation of Taylor bubbles in small tubes[J]. Chemical Engineering Science, 2006, 61(20): 6653-6666.
40	Abiev R S. Gas-liquid and gas-liquid-solid mass transfer model for Taylor flow in micro (milli) channels: a theoretical approach and experimental proof[J]. Chemical Engineering Journal Advances, 2020, 4: 100065.
41	Abiev R S, Butler C, Cid E, et al. Mass transfer characteristics and concentration field evolution for gas-liquid Taylor flow in milli channels[J]. Chemical Engineering Science, 2019, 207: 1331-1340.
42	Woo M, Tischer S, Deutschmann O, et al. A step toward the numerical simulation of catalytic hydrogenation of nitrobenzene in Taylor flow at practical conditions[J]. Chemical Engineering Science, 2021, 230: 116132.
43	Peng Z B, Gai S L, Barma M, et al. Experimental study of gas-liquid-solid flow characteristics in slurry Taylor flow-based multiphase microreactors[J]. Chemical Engineering Journal, 2021, 405: 126646.
44	Bahmanyar A, Khoobi N, Mozdianfard M R, et al. The influence of nanoparticles on hydrodynamic characteristics and mass transfer performance in a pulsed liquid-liquid extraction column[J]. Chemical Engineering and Processing: Process Intensification, 2011, 50(11/12): 1198-1206.
45	Alper E, Wichtendahl B, Deckwer W D. Gas absorption mechanism in catalytic slurry reactors[J]. Chemical Engineering Science, 1980, 35(1/2): 217-222.
46	Farzani Tolesorkhi S, Esmaeilzadeh F, Riazi M. Experimental and theoretical investigation of CO₂ mass transfer enhancement of silica nanoparticles in water[J]. Petroleum Research, 2018, 3(4): 370-380.
47	Nagy E, Feczkó T, Koroknai B. Enhancement of oxygen mass transfer rate in the presence of nanosized particles[J]. Chemical Engineering Science, 2007, 62(24): 7391-7398.

[1]	温唯谷, 袁志宏, 王凯, 骆广生. 微分散液滴的光纤检测研究[J]. 化工学报, 2024, 75(1): 211-220.
[2]	郑雨婷, 方冠东, 张梦波, 张浩淼, 王靖岱, 阳永荣. 微化工精馏分离技术研究进展[J]. 化工学报, 2024, 75(1): 47-59.
[3]	王俊男, 何呈祥, 王忠东, 朱春英, 马友光, 付涛涛. T型微混合器内均相混合的数值模拟[J]. 化工学报, 2024, 75(1): 242-254.
[4]	李亚婷, 王忠东, 董艳鹏, 朱春英, 马友光, 付涛涛. 微通道中毛细流动及其工程应用的研究进展[J]. 化工学报, 2024, 75(1): 159-170.
[5]	崔怡洲, 李成祥, 翟霖晓, 刘束玉, 石孝刚, 高金森, 蓝兴英. 亚毫米气泡和常规尺寸气泡气液两相流流动与传质特性对比[J]. 化工学报, 2024, 75(1): 197-210.
[6]	晁京伟, 许嘉兴, 李廷贤. 基于无管束蒸发换热强化策略的吸附热池的供热性能研究[J]. 化工学报, 2023, 74(S1): 302-310.
[7]	江河, 袁俊飞, 王林, 邢谷雨. 均流腔结构对微细通道内相变流动特性影响的实验研究[J]. 化工学报, 2023, 74(S1): 235-244.
[8]	李艺彤, 郭航, 陈浩, 叶芳. 催化剂非均匀分布的质子交换膜燃料电池操作条件研究[J]. 化工学报, 2023, 74(9): 3831-3840.
[9]	赵佳佳, 田世祥, 李鹏, 谢洪高. SiO₂-H₂O纳米流体强化煤尘润湿性的微观机理研究[J]. 化工学报, 2023, 74(9): 3931-3945.
[10]	刘文竹, 云和明, 王宝雪, 胡明哲, 仲崇龙. 基于场协同和耗散的微通道拓扑优化研究[J]. 化工学报, 2023, 74(8): 3329-3341.
[11]	毛磊, 刘冠章, 袁航, 张光亚. 可捕集CO₂的纳米碳酸酐酶粒子的高效制备及性能研究[J]. 化工学报, 2023, 74(6): 2589-2598.
[12]	张媛媛, 曲江源, 苏欣欣, 杨静, 张锴. 循环流化床燃煤机组SNCR脱硝过程气液传质和反应特性[J]. 化工学报, 2023, 74(6): 2404-2415.
[13]	孙永尧, 高秋英, 曾文广, 王佳铭, 陈艺飞, 周永哲, 贺高红, 阮雪华. 面向含氮油田伴生气提质利用的膜耦合分离工艺设计优化[J]. 化工学报, 2023, 74(5): 2034-2045.
[14]	王皓, 唐思扬, 钟山, 梁斌. MEA吸收CO₂富液解吸过程中固体颗粒表面的强化作用分析[J]. 化工学报, 2023, 74(4): 1539-1548.
[15]	刘倩, 曹禹, 周琦, 穆景山, 历伟. 孔道结构修饰的Ziegler-Natta催化剂设计与高抗冲低缠结UHMWPE的制备[J]. 化工学报, 2023, 74(3): 1092-1101.

缩口T型微通道内纳米流体吸收CO₂的流动与传质研究

Flow and mass transfer study of CO₂ absorption by nanofluid in T-shaped microchannels

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 10

参考文献 47

相关文章 15

编辑推荐

Metrics

本文评价