Add time:08/17/2019         Source:sciencedirect.com

In this work, CO2 gas was absorbed from a gas mixture in a custom made Polyvinylidene fluoride (PVDF) hollow fiber membrane contactors by using a variety of Methyl Diethanolamine (MDEA) aqueous solutions and nanofluids. An ultrasonic dispersion method was used to prepare nanofluids. SiO2 nanoparticles and carbon nanotubes (CNTs) were dispersed in deionized (DI) water and MDEA without adding any surfactant. The prepared solvents were fed into the tube side of the membrane module, whereas the gas mixture passed through the shell side. CO2 absorption experiments were carried out using four different liquid flow rates: 10, 20, 30 & 40 ml/min. All experiments were conducted at ambient temperature and atmospheric pressure. CO2 absorption process carried out by using pure deionized water as a reference. The effects of different parameters on the removal efficiency of CO2 were investigated and analyzed with a focus on concentrations and types of amines and nanoparticles and liquid flow rates. Carbon nanotubes show substantial enhancement in the absorption of CO2 from the CO2/N2 gas mixture.

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