Treatment of Benzene, Toluene and Xylene Contaminated Air in a Bioactive Foam Emulsion Reactor

Shahna, Farshid Ghorbani; Golbabaei, F; Hamedi, Javad; Mahjub, Hossein; Darabi, Hossein Reza; Shahtaheri, SJ

doi:10.1016/s1004-9541(08)60331-6

Cited by 30 publications

(9 citation statements)

References 21 publications

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“…A wide array of physicochemical technologies, such as thermal and catalytic oxidation, photocatalytic oxidation [7], biological degradation [8,9], condensation, adsorption, and absorption [3], have been used for capturing VOCs from industrial exhausts [10]. In comparison to other air pollution control technologies, adsorption-based technologies are being considered as simple, capable to manage multicomponent pollutants, efficient and cost effective process that can be used for capturing and recovering VOCs at different concentrations [11,12].…”

Section: Introductionmentioning

confidence: 99%

Effects of Post-Synthesis Activation and Relative Humidity on Adsorption Performance of ZIF-8 for Capturing Toluene from a Gas Phase in a Continuous Mode

et al. 2018

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Zeolitic imidazolate framework-8 (ZIF-8) was used as an adsorbent for the removal of toluene in its gas phase at different relative humidity (RH). High-purity ZIF-8 with an average particle size of 0.64 µm synthesized from an aqueous solution at room temperature, and then characterized by X-ray diffraction (XRD), fourier transform infrared (FT-IR) and scanning electron microscopy (SEM) techniques. Dynamic adsorption (continuous mode) experiments of toluene on ZIF-8 were studied using breakthrough curves. The effects of thermal pretreatment (activation) under dry air and N 2 atmospheres on the adsorbent performances was studied. ZIF-8 activated at 300 • C for 3 h under dry air showed the highest adsorption capacity of 562.17 mg•g −1. Furthermore, it was observed that the adsorption of toluene on ZIF-8 was significantly decreased at 80% RH. The experimental data of dynamic adsorption well fitted into the Thomas and Yan mathematical models.

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Section: Introductionmentioning

confidence: 99%

Effects of Post-Synthesis Activation and Relative Humidity on Adsorption Performance of ZIF-8 for Capturing Toluene from a Gas Phase in a Continuous Mode

et al. 2018

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“…Aromatic hydrocarbons, such as benzene, toluene, and xylenes represent another class of VOCs emitted in exhaust gas, which are usually toxic and carcinogenic [145]. SACs have also shown promise towards the catalytic oxidation of these VOCs based on aromatic hydrocarbons [61,62,70,146].…”

Section: Catalytic Oxidation Of Aromatic Hydrocarbonsmentioning

confidence: 99%

Single-atom site catalysts for environmental catalysis

et al. 2020

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In recent decades, the environmental protection and long-term sustainability have become the focus of attention due to the increasing pollution generated by the intense industrialization. To overcome these issues, environmental catalysis has increasingly been used to solve the negative impact of pollutants emission on the global environment and human health. Supported platinum-metal-group (PGM) materials are commonly utilized as the state-of-the-art catalysts to eliminate gaseous pollutants but large quantities of PGMs are required. By comparison, single-atom site catalysts (SACs) have attracted much attention in catalysis owing to their 100% atom efficiency and unique catalytic performances towards various reactions. Over the past decade, we have witnessed burgeoning interests of SACs in heterogeneous catalysis. However, to the best of our knowledge, the systematic summary and analysis of SACs in catalytic elimination of environmental pollutants has not yet been reported. In this paper, we summarize and discuss the environmental catalysis applications of SACs. Particular focus was paid to automotive and stationary emission control, including model reaction (CO oxidation, NO reduction and hydrocarbon oxidation), overall reaction (three-way catalytic and diesel oxidation reaction), elimination of volatile organic compounds (formaldehyde, benzene, and toluene), and removal/decomposition of other pollutants (Hg 0 and SO 3). Perspectives related to further challenges, directions and design strategies of single-atom site catalysts in environmental catalysis were also provided.

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“…The bioreactor consists of an emulsion of highly active pollutant degrading microorganisms and water-immiscible organic phase, which is made into foam by passing the waste-gas. The amount of organic phase is low and it uses a biocompatible surfactant for foam production (Shahna et al 2010 ) . There are only a few reports on foam-emulsion bioreactor for waste-gas treatment, and these results suggest that the foam-emulsion bioreactors could be an interesting alternative to conventional biological treatment systems, if high performance is desired (Kan and Deshusses 2003Shahna et al 2010 ) .…”

Section: Foam-emulsion Bioreactormentioning

confidence: 99%

“…The amount of organic phase is low and it uses a biocompatible surfactant for foam production (Shahna et al 2010 ) . There are only a few reports on foam-emulsion bioreactor for waste-gas treatment, and these results suggest that the foam-emulsion bioreactors could be an interesting alternative to conventional biological treatment systems, if high performance is desired (Kan and Deshusses 2003Shahna et al 2010 ) . According to Kan and Deshusses ( 2005 ) , the foam is continuously collapsed and the cells with the emulsion are reused after the desired level of biotreatment is achieved in the reactor.…”

Section: Foam-emulsion Bioreactormentioning

confidence: 99%