Separation of organic compounds from gaseous mixtures by vapor permeation

Petrusová, Zuzana; Machanová, Karolina; Stanovský, Petr; Izák, Pavel

doi:10.1016/j.seppur.2019.02.028

Cited by 30 publications

(13 citation statements)

References 123 publications

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“…Pollution control authorities worldwide have levied stringent emission guidelines to restrict the VOCs released from various industries. Hence, VOC removal using sustainable and energy-efficient techniques has become vital and challenging …”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Effect of Different Parameters on the Adsorption and Desorption of Trichloroethylene Vapor on Activated Carbon Particles

Nikam

Mandal

2020

ACS Omega

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Trichloroethylene (TCE) is used as a solvent in various industrial processes. During its use, TCE vaporizes and its vapor pollutes the working atmosphere. Its recovery is very important and activated carbon may be used for this purpose. In the present study, experiments were conducted with activated carbon particles for adsorption and desorption of TCE vapor. The adsorption isotherms were measured over a temperature range of 30–100 °C. Also, the effects of particle sizes (d p; 355, 500, and 710 μm), initial concentration of TCE vapor (100, 150, 200, and 250 ppm), and temperature (30, 50, and 100 °C) on the adsorption isotherms of TCE on activated carbon with air as the carrier stream were investigated, which were not reported earlier. From the experimental results, it was found that as the particle size decreases the adsorption capacity increases because of the increase in surface area with decrease in size of particles. The effect of the initial concentration of TCE vapor showed proportionality with adsorption capacity. The increase in temperature showed increase in the adsorption capacity. The adsorption isotherms obtained from the experimental results were compared with model isotherms viz. Langmuir and Freundlich. The Langmuir and Freundlich isotherm models showed accurate fits with R 2 values of 0.99067 and 0.99142, respectively, suggesting a hybrid adsorption mechanism involving monolayer and multilayer adsorption. From the desorption study, it was found that the recovery of TCE–vapor from activated carbon is possible, and hence its reuse. This study confirms the suitability of activated carbon as an adsorbent for the removal of TCE vapors emitted from industrial and domestic sources. The details of the experiments and results are discussed in this article.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of the Effect of Different Parameters on the Adsorption and Desorption of Trichloroethylene Vapor on Activated Carbon Particles

Nikam

Mandal

2020

ACS Omega

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“…Under such circumstances, it is urgent to explore effective ways to degrade VOCs. At present, several methods are available to control VOC emissions such as adsorption, 7 absorption, 8,9 condensation, 10,11 membrane separation, 12 biochemical degradation, 13,14 direct combustion, 15 and catalytic combustion. [16][17][18] Thermal catalysis or biological oxidation can destroy the structure of VOCs and degrade it into carbon dioxide and water.…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of toluene over B‐site doped La‐based perovskite LaNi_xB_1−xO₃ (B = Co, Cu) catalysts

Zhang

et al. 2022

Env Prog and Sustain Energy

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A series of LaNi x B 1Àx O 3 (B = Co, Cu) perovskite catalysts were prepared by sol-gel method and applied in toluene degradation. The effects of different calcination temperatures and time on the performance of perovskite catalysts for toluene were investigated. And the CO 2 yield was also carried out on as-prepared catalysts. The results showed that a small amount of Co-doping in B site of LaNiO 3 could significantly improve its toluene degradation, while the substitution of Ni with Cu could not effectively enhance its activity. When the Ni/Co molar ratio in LaNi x Co 1Àx O 3 perovskite was 3:1, LaNi 0.75 Co 0.25 O 3 catalyst exhibited the best activity, and it showed relatively short time and low temperature (T 90 = 225 C, T 90 , corresponding to 90% conversion) for toluene degradation. Therefore, LaNi 0.75 Co 0.25 O 3 catalyst has a broad prospect in the degradation of volatile organic pollutants.

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“…The increase in the selectivity of silicone rubbers could be achieved by introducing hydrophobic zeolites into the polymer matrix [ 36 ], co-polymerization of dimethylsiloxane with more hydrophobic monomers [ 37 ], as well as the introduction of hydrophobic substituents into the main and side-chain of the polymer [ 23 , 38 , 39 , 40 ]. For example, polyheptylmethylsiloxane demonstrates a significantly higher n-butanol-water separation factor (97) compared to PDMS (38) [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

High Selective Composite Polyalkylmethylsiloxane Membranes for Pervaporative Removal of MTBE from Water: Effect of Polymer Side-chain

et al. 2020

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For the first time, the effect of the side-chain in polyalkylmethylsiloxane towards pervaporative removal of methyl tert-butyl ether (MTBE) from water was studied. The noticeable enhancement of separation factor during the pervaporation of 1 wt.% MTBE solution in water through the dense film (40–50 µm) can be achieved by substitution of a methyl group (separation factor 111) for heptyl (161), octyl (169) or decyl (180) one in polyalkylmethylsiloxane. Composite membrane with the selective layer (~8 µm) made of polydecylmethylsiloxane (M10) on top of microfiltration support (MFFK membrane) demonstrated MTBE/water separation factor of 310, which was 72% greater than for the dense film (180). A high separation factor together with an overall flux of 0.82 kg·m−2·h−1 allowed this M10/MFFK composite membrane to outperform the commercial composite membranes. The analysis of the concentration polarization modulus and the boundary layer thickness revealed that the feed flow velocity should be gradually increased from 5 cm·s−1 for an initial solution (1 wt.% of MTBE in water) to 13 cm·s−1 for a depleted solution (0.2 wt.% of MTBE in water) to overcome the concentration polarization phenomena in case of composite membrane M10/MFFK (Texp = 50 °C).

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Separation of organic compounds from gaseous mixtures by vapor permeation

Cited by 30 publications

References 123 publications

Experimental Study of the Effect of Different Parameters on the Adsorption and Desorption of Trichloroethylene Vapor on Activated Carbon Particles

Experimental Study of the Effect of Different Parameters on the Adsorption and Desorption of Trichloroethylene Vapor on Activated Carbon Particles

Catalytic oxidation of toluene over B‐site doped La‐based perovskite LaNi_xB_1−xO₃ (B = Co, Cu) catalysts

High Selective Composite Polyalkylmethylsiloxane Membranes for Pervaporative Removal of MTBE from Water: Effect of Polymer Side-chain

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Separation of organic compounds from gaseous mixtures by vapor permeation

Cited by 30 publications

References 123 publications

Experimental Study of the Effect of Different Parameters on the Adsorption and Desorption of Trichloroethylene Vapor on Activated Carbon Particles

Experimental Study of the Effect of Different Parameters on the Adsorption and Desorption of Trichloroethylene Vapor on Activated Carbon Particles

Catalytic oxidation of toluene over B‐site doped La‐based perovskite LaNixB1−xO3 (B = Co, Cu) catalysts

High Selective Composite Polyalkylmethylsiloxane Membranes for Pervaporative Removal of MTBE from Water: Effect of Polymer Side-chain

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Catalytic oxidation of toluene over B‐site doped La‐based perovskite LaNi_xB_1−xO₃ (B = Co, Cu) catalysts