Transversal Submerged Membrane Contactor for Simultaneous Absorption and Desorption of CO2 During Natural Gas Sweetening Process

7th Nanoscience and Nanotechnology Symposium

物理学;材料科学

Siagian, U.W.R.^1 ; Rahmawati, Y.^2 ; Khoiruddin, K.^3 ; Hakim, A.N.^3 ; Wenten, I.G.^3

Department of Petroleum Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung

40132, Indonesia^1

Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia^2

Department of Chemical Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung

40132, Indonesia^3

关键词: Absorption-desorption;    Longitudinal axis;    Membrane performance;    Operating parameters;    Polypropylene hollow fiber membrane;    Separation efficiency;    Simultaneous absorption;    Submerged membrane;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/395/1/012013/pdf
DOI  :  10.1088/1757-899X/395/1/012013

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work, a unique transversal submerged membrane contactor is used for CO2 removal. The developed configuration is aimed to provide the possibility to perform simultaneous absorption and desorption of carbon dioxide in a single module. In addition, this configuration is expected to reduce the solvent circulation which is the major obstacle encountered in separated absorption-desorption unit. The module contains a number of polypropylene hollow fiber membranes arranged perpendicularly to the longitudinal axis in which the fibers are submerged into a solvent. Pure water which is placed in the shell of the module is used as the solvent. The effects of operating parameters such as gas flow rate (40-80 ml/min) and operating time on membrane performance are investigated. In addition, the simultaneous absorption-desorption process is compared to the separated ones. Results revealed that CO2 removal is significantly affected by the gas flow rate. The optimum gas flow rate is 60 ml/min (vacuum pressure of 60.5 kPa) with >80% CO2 absorption and desorption efficiencies. During a long-term operation, the separation efficiencies are decreased after 200 minutes of operation which may be associated with membrane wetting phenomenon. The simultaneous absorption-desorption process shows a higher separation efficiency rather than the separated process.