Discussion on Water Condensation in Membrane Pores during CO2 Absorption at High Temperature

Chan, Zhe Phak; Li, Lin; Kang, Guodong; Manan, Norfaizah Ab; Cao, Yijun; Wang, Tonghua

doi:10.3390/membranes10120407

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…This mixture was used to mimic the composition of natural gas. The feed gas setup was constructed according to the method previously described by Chan et al [42].…”

Section: Methodsmentioning

confidence: 99%

Enhancement of CO2 Absorption Process Using High-Frequency Ultrasonic Waves

Tamidi,

Lau,

Yusof

et al. 2023

Sustainability

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The advancement of efficient carbon capture technology is vital for the transition to a net-zero carbon future. Critical developments in ultrasonic irradiation can be used to enhance the conventional CO2 absorption process. For example, sonophysical effects such as acoustic streaming, acoustic cavitation, acoustic fountain and atomization induced by the propagation of high-frequency ultrasonic waves in a liquid medium can enhance the mixing and create a larger interfacial area for gas–liquid mass transfer. In this study, the performance of a continuous ultrasonic-assisted CO2 absorption process using MDEA was investigated. The design of experiment (DOE) was used to study the effect of the gas flowrate, liquid flowrate and ultrasonic power on CO2 absorption performance. Based on the findings, ultrasonic power was the most significant parameter affecting the CO2 outlet concentration, liquid-to-gas ratio (L/G) and mass transfer coefficient (KGa), which confirmed that ultrasonic irradiation has a significant impact on the intensification of the CO2 absorption process. The optimum condition to achieve the target CO2 absorption performance was numerically determined and validated with experimental tests. The results from the verification runs were in good agreement with the predicted values, and the average error was less than 10%.

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“…This mixture was used to mimic the composition of natural gas. The feed gas setup was constructed according to the method previously described by Chan et al [42].…”

Section: Methodsmentioning

confidence: 99%

Enhancement of CO2 Absorption Process Using High-Frequency Ultrasonic Waves

Tamidi,

Lau,

Yusof

et al. 2023

Sustainability

View full text Add to dashboard Cite

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“…Furthermore, as the operating temperature rises, the efficiency of removal decreases. Chan et al [28] studied the water condensation in pores of polytetrafluoroethylene (PTFE) hollow fiber membranes during high-pressure CO 2 absorption around 70 • C. They found that water condensation is a possible cause of membrane wetting in the operation of membrane contactors, especially under high-temperature conditions. Lim et al [29] numerically investigated the mass transport of one of a bundle of fibers using the ANSYS Fluent software that is based on the finite volume method (FVM).…”

Section: Introductionmentioning

confidence: 99%

Effects of Operating and Structural Parameters on Removal of Nitric Oxide by Oxidation in a Ceramic Hollow Fiber Membrane Contactor

Yuan

2021

Membranes

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A numerical study on the oxidation removal of nitric oxide in a ceramic hollow fiber membrane contactor was performed. To represent the transport and absorption process, the model was created by combining multiphase, species, reaction, and porous models. The numerical results were verified by comparing them with experimental data. The tube and lumen sides both have laminar parabolic velocity distributions. The nitric oxide concentration decreases gradually from the membrane wall to axis at the cross-section except on the inner and outer sides of the membrane tube. The equivalent diffusion length was proved useful for evaluating the entrance effect. At low concentrations, the reduction efficiency was proportional to the absorbent concentration, and at large concentrations, it neared a maximum value. The reduction efficiency was positively affected by elevated operating temperature and pressure. With a gas channel width of 13 mm, the reduction flow rate achieves its maximum. The efficiency of NO reduction per area decreases as the effective membrane length increases. Increasing the operating temperature and membrane length are recommended as design priorities due to high relative enhancements. It is not recommended to improve reduction efficiency by increasing membrane tube diameter and operating pressure in design. Changing the gas flow rate, absorbent concentration and gas channel width are moderate recommended as well.

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