微反应器内CO2解吸过程流动行为及气提强化

doi:10.11949/0438-1157.20190142

摘要/Abstract

摘要：

研究了微反应器内N-甲基二乙醇胺溶液解吸过程的流动和气提强化行为。观测到解吸过程中气-液两相流型主要有泡状流、弹状流、环状流和细环流。高温时，流型交替演化将导致气泡速度波动。气提促进强化CO₂解吸过程的结果表明，低溶液流量时，少量惰性气体就可显著提高CO₂解吸速率；大惰性气体流量将缩短停留时间，经计算解吸强化效率，确定了解吸过程的最佳气提流量。

关键词: 微反应器, 二氧化碳捕集, 解吸, N-甲基二乙醇胺, 流型, 气提

Abstract:

The flow pattern and stripping enhancement of CO₂ desorption from N-methyldiethanolamine solution were investigated in microreactor. It is observed that the gas-liquid two-phase flow patterns in the desorption process mainly include bubble flow, slug flow, annular flow and fine circulation. However, the periodic change of flow patterns resulted in the fluctuation of bubble velocity at high temperature. According to the results of stripping enhancement on the CO₂ desorption, it showed that CO₂ desorption rate was significantly enhanced at low solution rate by adding small amount of inert gas, while excessive gas will lead to a reduction in the solution residence time. The optimal inert gas flow rate was determined by calculating the stripping enhancement per unit gas flow rate.

Key words: microreactor, CO₂ capture, desorption, N-methyldiethanolamine, flow pattern, stripping

中图分类号:

TQ 028.3

刘宏臣, 周峰, 尧超群, 陈光文. 微反应器内CO₂解吸过程流动行为及气提强化[J]. 化工学报, 2019, 70(7): 2448-2455.

Hongchen LIU, Feng ZHOU, Chaoqun YAO, Guangwen CHEN. Flow behavior and stripping enhancement of CO₂ desorption process in microreactor[J]. CIESC Journal, 2019, 70(7): 2448-2455.

图/表 10

图1 微反应器及微反应器单元局部剖图

Fig.1 Schematic diagram of microreactor and compact microreactor with part-sectional view

图2 实验装置

Fig.2 Schematic diagram of experimental setup

图3 微通道内CO2解吸过程气液两相流型

Fig.3 Flow regimes in microchannels during CO2 desorption

图4 微通道内CO2解吸过程流型交替现象

Fig.4 Periodic change of flow patterns in microchannels during CO2 desorption

图5 气泡速度变化（QL =0.25 ml/min）

Fig.5 Bubble velocity as function of time

图6 气泡移动速度对气泡长度增加速率的影响

Fig.6 Effect of bubble velocity on growth rate of bubble length

图7 溶液流量和温度对气泡长度增长速率的影响

Fig.7 Effect of solution flow rate and desorption temperature on growth rate of bubble length

图8 不同富液流量下N2流量对CO2解吸速率和CO2解吸率的影响

Fig.8 Effects of N2 flow rate on CO2 desorption rate and CO2 desorption percentage at different solution flow rate

图9 N2流量对CO2解吸气提强化效率的影响及单位N2流量引起的强化倍数

Fig.9 Effects of N2 flow rate on ratio of CO2 desorption rate and stripping enhancement per unit gas flow rate as function of gas flow rate

图10 不同CO2载荷下N2流量对CO2解吸速率和CO2解吸率的影响

Fig.10 Effects of N2 flow rate on CO2 desorption rate and CO2 desorption percentage at different CO2 loading

参考文献 30

1	PachauriR K, AllenM, BarrosV, et al. Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, IPCC2014[R].
2	RochelleG T. Amine scrubbing for CO₂ capture [J]. Science, 2009, 325(5948): 1652-1654.
3	LiB Y, DuanY H, LuebkeD, et al. Advances in CO₂ capture technology: a patent review [J]. Applied Energy, 2013, 102: 1439-1447.
4	LiT Y, KeenerT C. A review: desorption of CO₂ from rich solutions in chemical absorption processes [J]. Int. J. Greenhouse Gas Control, 2016, 51: 290-304.
5	MondalM K, BalsoraH K, VarshneyP. Progress and trends in CO₂ capture/separation technologies: a review [J]. Energy, 2012, 46 (1): 431-441.
6	AaronD, TsourisC. Separation of CO₂ from flue gas: a review [J]. Sep. Sci. Technol., 2005, 40(1/2/3): 321-348.
7	HaszeldineR S. Carbon capture and storage: how green can black be? [J]. Science, 2009, 325(5948): 1647-1652.
8	Abu-ZahraM R M, NiedererJ P M, FeronP H M, et al. CO₂ capture from power plants (Ⅱ): A parametric study of the economical performance based on mono-ethanolamine [J]. Int. J. Greenhouse Gas Control, 2007, 1(2): 135-142.
9	BieringerT, BuchholzS, KockmannN. Future production concepts in the chemical industry: modular-small-scale-continuous [J]. Chemical Engineering & Technology, 2013, 36(6): 900-910.
10	YaoC Q, DongZ Y, ZhaoY C, et al. Gas-liquid flow and mass transfer in a microchannel under elevated pressures [J]. Chem. Eng. Sci., 2015, 123: 137-145.
11	ChenG W, YueJ, YuanQ. Gas-liquid microreaction technology: recent developments and future challenges [J]. Chin. J. Chem. Eng., 2008, 16(5): 663-669.
12	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.
	ChenG W, ZhaoY C, YueJ, et al. Transport phenomena in micro-chemical engineering [J]. CIESC Journal, 2013, 64(1): 63-75.
13	董正亚, 陈光文, 赵帅南, 等. 声化学微反应器——超声和微反应器协同强化 [J]. 化工学报, 2018, 69(1): 102-115.
	DongZ Y, ChenG W, ZhaoS N, et al. Sonochemical microreactor — synergistic intensification ofultrasound and microreactor [J]. CIESC Journal, 2018, 69(1): 102-115.
14	ZhaoS N, DongZ Y, YaoC Q, et al. Liquid-liquid two-phase flow in ultrasonic microreactors: cavitation, emulsification, and mass transfer enhancement [J]. AIChE Journal, 2018, 64(4): 1412-1423.
15	ZanfirM, GavriilidisA, WilleC, et al. Carbon dioxide absorption in a falling film microstructured reactor: experiments and modeling [J]. Industrial & Engineering Chemistry Research, 2005, 44(6): 1742-1751.
16	ConstantinouA, BarrassS, PronkF, et al. CO₂ absorption in a high efficiency silicon nitride mesh contactor [J]. Chem. Eng. J., 2012, 207: 766-771.
17	YeC B, ChenG W, YuanQ. Process characteristics of CO₂ absorption by aqueous monoethanolamine in a microchannel reactor [J]. Chin. J. Chem. Eng., 2012, 20(1): 111-119.
18	TegrotenhuisW, CameronR, ViswanathanV, et al. Solvent extraction and gas absorption using microchannel contactors[M]//Microreaction Technology: Industrial Prospects.Berlin: Springer, 2000:541-549.
19	LinG Y, JiangS, ZhuC Y, et al. Mass transfer characteristics of CO₂ absorption into aqueous solutions of N-methyldiethanolamine+diethanolamine in a T-junction microchannel [J]. ACS Sustainable Chem. Eng., 2019, 7(4): 4368-4375.
20	KenigE Y, SuY H, LautenschlegerA, et al. Micro-separation of fluid systems: a state-of-the-art review [J]. Sep. Sci. Technol., 2013, 120: 245-264.
21	NguyenD T, Esser-kahnA P. A microvascular system for chemical reactions using surface waste heat [J]. Angew. Chem. Int. Ed., 2013, 52(51): 13731-13734.
22	LiuH C, YaoC Q, ZhaoY C, et al. Desorption of carbon dioxide from aqueous MDEA solution in a microchannel reactor [J]. Chem. Eng. J., 2017, 307: 776-784.
23	LiuH C, ZhaoS N, ZhouF, alet, Ultrasonic enhancement ofCO2 desorption from MDEA solution in microchannels [J]. Ind. Eng. Chem. Res.,2019, 58(4):1711-1719.
24	ZhangJ F, QiaoY, AgarD W. Intensification of low temperature thermomorphic biphasic amine solvent regeneration for CO₂ capture [J]. Chemical Engineering Research and Design, 2012, 90(6): 743-749.
25	ShaoN, GavriilidisA, AngeliP. Flow regimes for adiabatic gas-liquid flow in microchannels [J]. Chem. Eng. Sci., 2009, 64(11): 2749-2761.
26	ZhaoY C, ChenG W, YeC B, et al. Gas-liquid two-phase flow in microchannel at elevated pressure [J]. Chem. Eng. Sci., 2013, 87: 122-132.
27	TriplettK, GhiaasiaanS, Abdel-khalikS, et al. Gas-liquid two-phase flow in microchannels (Ⅰ): Two-phase flow patterns [J]. Int. J. Multiphase Flow, 1999, 25(3): 377-394.
28	YueJ, ChenG W, YuanQ, et al. Hydrodynamics and mass transfer characteristics in gas-liquid flow through a rectangular microchannel [J]. Chem. Eng. Sci., 2007, 62(7): 2096-2108.
29	CubaudT, HoC M. Transport of bubbles in square microchannels [J]. Physics of Fluids, 2004, 16(12): 4575-4585.
30	WuH, ChengP. Visualization and measurements of periodic boiling in silicon microchannels [J]. Int. J. Heat Mass Transfer, 2003, 46(14): 2603-2614.

[1]	周绍华, 詹飞龙, 丁国良, 张浩, 邵艳坡, 刘艳涛, 郜哲明. 短管节流阀内流动噪声的实验研究及降噪措施[J]. 化工学报, 2023, 74(S1): 113-121.
[2]	盛冰纯, 于建国, 林森. 铝基锂吸附剂分离高钠型地下卤水锂资源过程研究[J]. 化工学报, 2023, 74(8): 3375-3385.
[3]	郭雨莹, 敬加强, 黄婉妮, 张平, 孙杰, 朱宇, 冯君炫, 陆洪江. 稠油管道水润滑减阻及压降预测模型修正[J]. 化工学报, 2023, 74(7): 2898-2907.
[4]	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.
[5]	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.
[6]	杨星宇, 马优, 朱春英, 付涛涛, 马友光. 梳状并行微通道内液液分布规律研究[J]. 化工学报, 2023, 74(2): 698-706.
[7]	章承浩, 罗京, 张吉松. 微反应器内基于氮氧自由基催化剂连续氧气/空气氧化反应的研究进展[J]. 化工学报, 2023, 74(2): 511-524.
[8]	谢煜, 张民, 胡卫国, 王玉军, 骆广生. 利用膜分散微反应器高效溶解D-7-ACA的研究[J]. 化工学报, 2023, 74(2): 748-755.
[9]	付家崴, 陈帅帅, 方凯伦, 蒋新. 微反应器共沉淀反应制备铜锰催化剂[J]. 化工学报, 2023, 74(2): 776-783.
[10]	王煦清, 严圣林, 朱礼涛, 张希宝, 罗正鸿. 填料塔中有机胺吸收CO₂气液传质的研究进展[J]. 化工学报, 2023, 74(1): 237-256.
[11]	顾仁杰, 张加威, 靳雪阳, 文利雄. 微撞击流反应器制备镍钴复合氢氧化物超级电容器材料及其性能研究[J]. 化工学报, 2022, 73(8): 3749-3757.
[12]	张建伟, 高伟峰, 董鑫, 冯颖. 浸没式撞击流反应器流场涡特性的数值研究[J]. 化工学报, 2022, 73(8): 3553-3564.
[13]	张经纬, 周弋惟, 陈卓, 徐建鸿. 微反应器内的有机合成前沿进展[J]. 化工学报, 2022, 73(8): 3472-3482.
[14]	侯跃辉, 刘璇, 廉应江, 韩梅, 尧超群, 陈光文. 超声微反应器内三硝基间苯三酚合成工艺研究[J]. 化工学报, 2022, 73(8): 3597-3607.
[15]	张劢, 田瑶, 郭之旗, 王叶, 窦广进, 宋浩. 光催化-生物杂合系统设计优化用于燃料和化学品绿色合成[J]. 化工学报, 2022, 73(7): 2774-2789.

微反应器内CO₂解吸过程流动行为及气提强化

Flow behavior and stripping enhancement of CO₂ desorption process in microreactor

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 10

参考文献 30

相关文章 15

编辑推荐

Metrics

本文评价