Removal of xylene vapor pollutant from the air using new hybrid substrates of TiO2-WO3 nanoparticles immobilized on the ZSM-5 zeolite under UV radiation at ambient temperature: Experimental towards modeling

Rangkooy, Hossein Ali; Ghaedi, Hosein; Jahani, Fereshteh

doi:10.1016/j.jece.2019.103247

Cited by 30 publications

(5 citation statements)

References 76 publications

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“…Design of experiment (DOE) is an effective method to understand a process as opposed to observing a process. Studying the influence of input parameter(s) on the response(s) is highly essential in a process, especially when different options are available for design [37][38][39][40]. Hence, DOE was applied by selecting the response surface methodology (RSM) based on the mixed-level full factorial design.…”

Section: Design Of Experimentsmentioning

confidence: 99%

Prioritizing Design Parameters for Stepped Chutes and Shear Stress Distribution

Morovati

Ghaedi

Akbari

et al. 2021

Water

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Stepped chutes offer high efficiency in decreasing flow velocity due to roughness; however, negative impacts may still be experienced by the receiving water body into downstream. These effects might be mitigated if geometric and hydraulic parameters governing the structure are well addressed. Herein, five influential parameters were developed, i.e., longitudinal slope S (S = tan θ), discharge (Q), pool height above steps (hp), chute width (W), and chute height (H), employing a three dimensional (3D) numerical model. Through 600 simulations, two regression models were developed for predicting depth-averaged velocity at the last step Vd (m/s) and critical length Lc (cm) at the downstream where the maximum velocity occurs, using response surface methodology (RSM) based on the mixed-level full factorial design. The prediction data obtained by developed regression models were agreeable with actual data with coefficient determination (R2) of about 0.95, highlighting the accuracy and ability of the models for the prediction of Vd and Lc. Additionally, the analysis of variance (ANOVA) was used to prioritize the impact of the studied parameters on Vd and Lc. Results highlighted that among geometric parameters, W and S had a significant influence on Vd and Lc; however, the impact of W was more pronounced. Using a regression model for Lc, a cross section was obtained, and the shear stress distribution of the downstream was compared with that of the last step and sidewalls. The shear stress patterns showed that the maximum value shifted from the side walls to the downstream between the lower and higher slopes. Further, the longitudinal distribution of shear stress at the downstream revealed that geometric and hydraulic characteristics played a negligible role in the changing pattern of shear stress. The results of this study reveal the dynamic behavior of the given structure where different geometric options are available for structure design.

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Section: Design Of Experimentsmentioning

confidence: 99%

Prioritizing Design Parameters for Stepped Chutes and Shear Stress Distribution

Morovati

Ghaedi

Akbari

et al. 2021

Water

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“…Design of experiment (DOE) is an effective method to manipulate a process as opposed to observing a process. 55,56 Studying the influence of input factor(s) on the response(s) is highly important in a process. To do so, therefore, DOE was applied by selecting the user-defined option of response surface methodology (RSM).…”

Section: Design Of Experiments (Doe)mentioning

confidence: 99%

High CO2 absorption in new amine based-transition-temperature mixtures (deep eutectic analogues) and reporting thermal stability, viscosity and surface tension: Response surface methodology (RSM)

Ghaedi

Zhao

Clough

et al. 2020

Journal of Molecular Liquids

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To study CO2 capture potential, n-methyl diethanolamine (MDEA) was used to prepare three types of transition-temperature mixtures (TTMs) by mixing methyltriphenylphosphonium bromide (MTPPB) as a hydrogen bond acceptor (HBA) and MDEA as a hydrogen bond donor (HBD) in molar ratios of 1:7, 1:10 and 1:16 HBA to HBD. Fourier transform infrared spectroscopy (FT-IR) results showed that TTMs have almost similar spectra to their HBD (MDEA) with different levels of transmittance and exhibit similar behavior. From the experimental results, it was found that the thermal stability, viscosity and surface tension of TTMs decreased as the concentration of MDEA in the mixture increased. According to response surface methodology (RSM) models and analysis of variance (ANOVA), temperature and molar ratio had a great effect on the viscosity and surface tension of TTMs. The final part of this research was the measurement of CO2 solubility in TTMs at 303.15 K at pressure up to 1.35 MPa. It was found that CO2 solubility in TTMs was enhanced as the MDEA quantity increased in the mixture up to 1:10 mole ratio. However, by increasing MDEA concentration to 16:1 mole ratio, there was a decreasing trend in the CO2 solubility data. Also, all TTMs, particularly TTM containing 10:1 mole MDEA (MTPPB-MDEA 1:10) exhibited an equilibrium loading capacity approaching 1 mole CO2 per mole solvent at high pressure, revealing

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“…Much research has been carried out about the basic principles and the increase in photocatalytic activities under ultraviolet light ( 16 , 17 ). On the other hand, the support of the photocatalyst on the supportive materials and stabilizers having a large surface area can condensate the diluted gas compounds or adsorb them, thereby increasing the decomposition yield ( 8 , 18 , 19 ).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Removal of Toluene Vapour Pollutant from the Air Using Titanium Dioxide Nanoparticles Supported on the Natural Zeolite

Rangkooy¹,

Mokaramian²,

Zargar³

2023

ijph

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Background: The emission of volatile organic compounds (VOCs) in industrial and urban areas has adverse effects on the environment and human health. Toluene, the main pollutant among the VOCs, has wide applications in different industries such as plastics, adhesives, silicone sealant, paint, etc. This study aimed to remove of toluene from the air by using TiO2 nanoparticles supported on the natural zeolite using the photocatalytic process. Methods: This is an experimental study that was conducted in 2017 in the Chemical Agents Laboratory of the Occupational Health Engineering Department at Jundishapur University in Ahvaz. Toluene vapour decomposition was carried out using UV/ZE, UV/TiO2, and UV/TiO2-ZE under continuous flows conditions. The effects of toluene initial concentration, retention time, and nanocomposite surface weight on toluene vapour decomposition were also investigated. Results: When UV/TiO2 and UV/TiO2-ZE systems are performed, increasing the initial toluene concentration reduces the efficiency of photocatalytic decomposition. The SEM images of TiO2-ZE catalyst show that zeolite pores were occupied by titanium dioxide nanoparticles. Moreover, the combination of titanium dioxide nanoparticles and zeolite has an incremental effect on toluene decomposition. Increasing retention time raises toluene decomposition, and the increased nanocomposite surface weight raises decomposition to the maximum level (70%) at 33.68 mg/cm2 weight and then decreases. Conclusion: The increasing toluene decomposition rate by using the TiO2-ZE nanocomposite can be due to the incremental effect of absorption and photocatalytic decomposition.

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Removal of xylene vapor pollutant from the air using new hybrid substrates of TiO2-WO3 nanoparticles immobilized on the ZSM-5 zeolite under UV radiation at ambient temperature: Experimental towards modeling

Cited by 30 publications

References 76 publications

Prioritizing Design Parameters for Stepped Chutes and Shear Stress Distribution

Prioritizing Design Parameters for Stepped Chutes and Shear Stress Distribution

High CO2 absorption in new amine based-transition-temperature mixtures (deep eutectic analogues) and reporting thermal stability, viscosity and surface tension: Response surface methodology (RSM)

Photocatalytic Removal of Toluene Vapour Pollutant from the Air Using Titanium Dioxide Nanoparticles Supported on the Natural Zeolite

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