Osmotic power production from seawater brine by hollow fiber membrane modules: Net power output and optimum operating conditions

AIChE Journal ◽  
2015 ◽  
Vol 62 (4) ◽  
pp. 1216-1225 ◽  
Author(s):  
Sui Zhang ◽  
Tai-Shung Chung
2012 ◽  
Vol 18 (1) ◽  
pp. 205-211 ◽  
Author(s):  
Hae Young Hwang ◽  
Sang Yong Nam ◽  
Hyung Chul Koh ◽  
Seong Yong Ha ◽  
Giuseppe Barbieri ◽  
...  

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 496
Author(s):  
Sayali Ramdas Chavan ◽  
Patrick Perré ◽  
Victor Pozzobon ◽  
Julien Lemaire

Recently, membrane contactors have gained more popularity in the field of CO2 removal; however, achieving high purity and competitive recovery for poor soluble gas (H2, N2, or CH4) remains elusive. Hence, a novel process for CO2 removal from a mixture of gases using hollow fiber membrane contactors is investigated theoretically and experimentally. A theoretical model is constructed to show that the dissolved residual CO2 hinders the capacity of the absorbent when it is regenerated. This model, backed up by experimental investigation, proves that achieving a purity > 99% without consuming excessive chemicals or energy remains challenging in a closed-loop system. As a solution, a novel strategy is proposed: the pH Swing Absorption which consists of manipulating the acido–basic equilibrium of CO2 in the absorption and desorption stages by injecting moderate acid and base amount. It aims at decreasing CO2 residual content in the regenerated absorbent, by converting CO2 into its ionic counterparts (HCO3− or CO32−) before absorption and improving CO2 degassing before desorption. Therefore, this strategy unlocks the theoretical limitation due to equilibrium with CO2 residual content in the absorbent and increases considerably the maximum achievable purity. Results also show the dependency of the performance on operating conditions such as total gas pressure and liquid flowrate. For N2/CO2 mixture, this process achieved a nitrogen purity of 99.97% with a N2 recovery rate of 94.13%. Similarly, for H2/CO2 mixture, a maximum H2 purity of 99.96% and recovery rate of 93.96% was obtained using this process. Moreover, the proposed patented process could potentially reduce energy or chemicals consumption.


2013 ◽  
Vol 51 (31-33) ◽  
pp. 6346-6354 ◽  
Author(s):  
Yoon-Jin Kim ◽  
Taekgun Yun ◽  
Jinsik Sohn ◽  
Sangho Lee

2021 ◽  
pp. 225-252
Author(s):  
Chun Feng Wan ◽  
Tianshi Yang ◽  
G. Glenn Lipscomb ◽  
Donald J. Stookey ◽  
Tai-Shung Chung

Heliyon ◽  
2019 ◽  
Vol 5 (12) ◽  
pp. e02987 ◽  
Author(s):  
Sutrasno Kartohardjono ◽  
Clarissa Merry ◽  
Mohamad Sofwan Rizky ◽  
Catharina Candra Pratita

AIChE Journal ◽  
2002 ◽  
Vol 48 (10) ◽  
pp. 2203-2212 ◽  
Author(s):  
S. Chang ◽  
A. G. Fane ◽  
S. Vigneswaran

2010 ◽  
Vol 17 (1-3) ◽  
pp. 52-56 ◽  
Author(s):  
Shufeng Shen ◽  
Kathryn H. Smith ◽  
Sandra E. Kentish ◽  
Geoff W. Stevens

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