Controlled dehumidification to extract clean water from a multicomponent gaseous mixture of organic contaminants

Nikooei, Elnaz; AuYeung, Nick; Zhang, Xiang; Goulas, Konstantinos A.; Abbasi, Behrooz; Dyall, Alexander; Abbasi, Bahman

doi:10.1016/j.jwpe.2021.102229

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…It is commonly expressed in mass of oxygen consumed over volume of solution which in SI units is milligrams per liter (mg/L). A COD test can be used to easily quantify the amount of organics in water [20]. The simulation result is showed in Table 6.…”

Section: Organic Pollutant (Cod) Measurementmentioning

confidence: 99%

Study of Organic Acid Pollutant Removal Efficient in Treatment of Industrial Wastewater with HDH Process Using ASPEN Modelling

Zeng

Bai³

2022

Water

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Due to low efficiency and the material choice limitations of traditional evaporation systems to treat acid wastewater, humidification and dehumidification (HDH) as the core process was applied in the treatment and reduction of wastewater with organic acid pollutant concentrations. The forecasting of pH changes and COD reduction is important for the system’s design. Therefore, a study of the pollutant removal efficiency with different parameters, such as the reaction temperature, air quantity, and flow rate was conducted with ASPEN modeling. In this article, ASPEN modeling was used to simulate the water and acid material transformation in HDH system. The process was composed of blocks, such as RadFrac, heater and split. The analysis was taken with different air quantities, tower diameters, heat loads and flow rates. The analysis indicated that the pH of the maleic acid wastewater changed from 3.0 to 5.7. The relationship between inlet quantity, air quantity, inlet heat and the clean water yield was also shown in the modeling results. Based on these studies, we determined that the model can help engineers solve the key problems of HDH systems, such as heat balance calculation, equipment selection, and the prediction of incoming and outgoing evaporation materials.

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Section: Organic Pollutant (Cod) Measurementmentioning

confidence: 99%

Study of Organic Acid Pollutant Removal Efficient in Treatment of Industrial Wastewater with HDH Process Using ASPEN Modelling

Zeng

Bai³

2022

Water

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“…A more widespread method of dehumidification unit is tri-ethylene glycol (TEG) (20). This method only involves the use of two towers that is contacted with ethylene glycol which is a liquid of water absorbent in the gas absorption tower in the form of counter flow on the bubble cap trays and then in the solvent recycling operations disposal tower, is required to separate moisture from tri-ethylene glycol (21). Some of the main problems with glycolic dehumidifiers are: (22)(23)(24).…”

Section: Introductionmentioning

confidence: 99%

Effect of SiO2 Concentration and Time on Stability of TiO2 Zeolite Nanocomposite Membrane in Light Gas Dehumidification

Fouladi,

Mazaheri,

Marjani

2024

IJE

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The main goal of this research is to use zeolite TiO2 nanocomposite membranes in order to remove moisture from gas. For this reason, a certain TiZ-V membrane was selected and manufactured as a standard membrane, which was the result of the initial assessment of a suitable membrane for gas dehumidification, and this membrane was used as a standard to measure the effect of manufacturing parameters. The findings showed that increasing the concentration of SiO2 had greatest effect on increasing the water flux of the membrane due to the effect of increasing the reaction time of the vapor phase carrier and reducing the selectivity drop at higher pressures. Also, the experiments of changing the relative humidity of the feed have shown the improving efficiency of the membrane in relative humidities lower than 80%, so that under the conditions of lower relative humidity, the selectivity of the membrane has increased. Another positive point found is a slight change in the selectivity efficiency of the membrane with respect to different relative humidities. This case showed the stability of membrane performance under the different conditions of humidity of the feed gas. Next, in order to increase the performance of membrane as much as possible, the sweeper gas was added from the inside of membrane. Increase in the sweeper gas, which increases the water concentration gradient and decreases the gas concentration gradient on the sides of membrane wall, increases the selectivity of membrane to the highest level of 543.

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Separation of volatile organic contaminants from water using a direct-contact dehumidifier: An experimental study and modeling

Nikooei¹,

AuYeung²,

Lima³

et al. 2023

Journal of Water Process Engineering

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Controlled dehumidification to extract clean water from a multicomponent gaseous mixture of organic contaminants

Cited by 4 publications

References 41 publications

Study of Organic Acid Pollutant Removal Efficient in Treatment of Industrial Wastewater with HDH Process Using ASPEN Modelling

Study of Organic Acid Pollutant Removal Efficient in Treatment of Industrial Wastewater with HDH Process Using ASPEN Modelling

Effect of SiO2 Concentration and Time on Stability of TiO2 Zeolite Nanocomposite Membrane in Light Gas Dehumidification

Separation of volatile organic contaminants from water using a direct-contact dehumidifier: An experimental study and modeling

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