Mass transfer and hydraulic performance of CO<sub>2</sub> absorption by ionic liquids over structured packings

DAI Chengna; XIANG Yin; LEI Zhigang

doi:10.11949/j.issn.0438-1157.20150753

您当前的位置：

首页 >

文章列表页 >

Mass transfer and hydraulic performance of CO₂ absorption by ionic liquids over structured packings

更新时间：2025-12-10

- Mass transfer and hydraulic performance of CO₂ absorption by ionic liquids over structured packings
- CIESC Journal Issue 8, Pages: 2953-2961(2015)
- 作者机构：
  
  北京化工大学化工资源有效利用国家重点实验室,北京,100029
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150753
  CLC： Q028.8
- Online First：05 August 2015，
  
  Published：05 August 2015
- 稿件说明：
移动端阅览
DAI Chengna, XIANG Yin, LEI Zhigang. Mass transfer and hydraulic performance of CO₂ absorption by ionic liquids over structured packings[J]. CIESC Journal, 2015, (8): 2953-2961. DOI: 10.11949/j.issn.0438-1157.20150753.
DOI：

DAI Chengna, XIANG Yin, LEI Zhigang. Mass transfer and hydraulic performance of CO₂ absorption by ionic liquids over structured packings[J]. CIESC Journal, 2015, (8): 2953-2961. DOI: 10.11949/j.issn.0438-1157.20150753. DOI：

摘要

在规整填料塔中采用离子液体吸收二氧化碳气体

利用计算流体力学(CFD)软件建立可靠的数学模型

系统考察了离子液体结构及规整填料几何参数对吸收过程的传质特性和流体力学性能的影响规律。结果表明

床层压降随气体流速增大而增大

液相传质系数随液体流速的增大而增大。相同阴离子时

随着阳离子碳链长度的增长

吸收过程压降增大

同时液相传质系数减小。相同阳离子时

不同阴离子的离子液体压降大的同时传质系数也大。但离子液体的结构对压降影响不明显。离子液体筛选主要考虑传质系数和溶解度因素

但二者与离子液体结构表现出相反的规律。两种折线结构的规整填料传质性能优于传统的X型和Y型结构。

Abstract

In this work

ionic liquids (ILs) were proposed for the capture of CO2 over the structured packings. The pressure drop and mass transfer coefficient were investigated using computational fluid dynamics (CFD). The relationship among the structure of ILs

performance of pressure drop and mass transfer coefficient

as well as the relationship among the corrugation angles of structured packings

performance of pressure drop and mass transfer coefficient were identified. The results showed that under the same operating conditions with same anion

the increase of carbon number in the alkyl chain on the cation of ILs leads to the increase of the pressure drop (i.e.

[HMIM][Tf2N] > [BMIM][Tf2N] > [EMIM][Tf2N])

and decrease of the mass transfer coefficient (i.e.

[EMIM][Tf2N] > [BMIM][Tf2N] > [HMIM][Tf2N]). Thus

the cation [EMIM] is the optimum choice with regard to the pressure drop and mass transfer performance. Moreover

for ILs with different anions the pressure drop and mass transfer coefficient show the same trend

i.e.

[EMIM][BF4] > [EMIM][TFA] ≈ [EMIM][TfO] > [EMIM][Tf2N]. There is an inverse relationship between the mass transfer coefficient and solubility of CO2 for different ILs. Thus

there is a tradeoff when choosing IL for the capture of CO2. In addition

four types of structured packings with different corrugation angles (X type

Y type

and two transition types) were compared. From the viewpoint of mass transfer performance the two transition types structured packings are superior to the traditional X or Y types.

关键词

Keywords

references

Views

590

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Mass transfer performance of CO2 absorption into ionic liquid/ethanol mixture in microchannel

Mass transfer performance of enhanced CO2 absorption in swirling flow field

Volumetric overall mass transfer coefficients of CO2 absorption into aqua ammonia in structured packed column

Mass transfer study of CO2 absorption by TETA/DEEA biphasic absorbent in the microchannel

Numerical simulation of CO2 absorption by alkali liquor in T-junction cylindrical microchannels

Related Author

ZHANG Fanbin

ZHU Chunying

FU Taotao

JIANG Shan

DU Wei

ZHANG Qindan

MA Youguang

YU Zhiyuan

Related Institution

State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering(TianjinTianjin), School of Chemical Engineering and Technology, Tianjin University

School of Energy and Power Engineering, University of Shanghai for Science and Technology

天津大学化工学院

School of Environmental and Chemical Engineering, Xi’an Polytechnic University

Shandong Yanggu Huatai Chemical Co., Ltd.

⁰

Mass transfer and hydraulic performance of CO2 absorption by ionic liquids over structured packings

DOI：10.11949/j.issn.0438-1157.20150753

摘要

Abstract

关键词

Keywords

references

Mass transfer and hydraulic performance of CO₂ absorption by ionic liquids over structured packings