A mathematical model for VOCs removal in a treatment process coupling absorption and biodegradation

Wantz, Eliot; Kane, Abdoulaye; Lhuissier, Margaux; Amrane, Abdeltif; Audic, Jean‐Luc; Couvert, Annabelle

doi:10.1016/j.cej.2021.130106

Cited by 27 publications

(7 citation statements)

References 41 publications

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“…Traditional VOC removal technologies, such as adsorption, biodegradation, and thermal catalysis, are expensive and release toxic byproducts [9,10]. The absorption method for VOCs exhibits insufficient storage capacity, requires frequent replacement, and produces easy desorption when heating [11,12]. Thermal catalysis and biodegradation also present some disadvantages, including a low catalyst efficiency, high operating temperatures, and high costs [13].…”

Section: Introductionmentioning

confidence: 99%

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Eneşca

Sisman

2022

Catalysts

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A titania-free heterostructure based on CuS/SnO2/WO3 was obtained by a three-step sol–gel method followed by spray deposition on the glass substrate. The samples exhibit crystalline structures and homogenous composition. The WO3 single-component sample morphology consists of fibers that serve as the substrate for SnO2 development. The CuS/SnO2/WO3 heterostructure is characterized by a dense granular morphology. Photocatalytic activity was evaluated under UV–Vis radiation and indicates that the WO3 single-component sample is able to remove 41.1% of acetaldehyde (64.9 ppm) and 52.5% of formaldehyde (81.4 ppm). However, the CuS/SnO2/WO3 exhibits a superior photocatalytic activity due to a larger light spectrum absorption and lower charge carrier recombination rate, allowing the removal of 69.2% of acetaldehyde and 78.5% of formaldehyde. The reusability tests indicate that the samples have a stable photocatalytic activity after three cycle (12 h/cycle) assessments. During light irradiation, the heterostructure acted as a Z-scheme mechanism using the redox ability of the CuS conduction band electrons and the SnO2/WO3 valence band holes to generate the oxidative species required for VOC removal.

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Section: Introductionmentioning

confidence: 99%

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Eneşca

Sisman

2022

Catalysts

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“…20 Absorption of CVOCs in heavy solvents, also called high-boiling point organic solvents (e.g., silicone oil, cutting oil, and di(2-ethylhexyl) adipate) has been frequently investigated as potential technique allowing the purification of gas streams. 16,21,22 It is noteworthy that the absorbent regeneration process using heavy solvents requires a distillation column which will consume more energy. 20 Moreover, the undesired entrainment of heavy solvent by the purified gas causes solvent loss and environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquids for highly efficient methyl chloride capture and dehydration

et al. 2023

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A new methyl chloride (CH3Cl) capture and dehydration process using two ionic liquids (ILs) was designed and systematically studied. ILs [EMIM][Ac] and [EMIM][BF4] were screened out as CH3Cl capture and drying absorbents through the COSMO‐RS model. The result of solubility experiment suggests [EMIM][Ac] has an excellent solvent capacity for CH3Cl at mild operation conditions. The bench‐scale CH3Cl absorption experiments further confirmed the outstanding CH3Cl capture ability of [EMIM][Ac]. Besides, the water content of outlet gas can be decreased to 452 ppm (ma's fraction) using [EMIM][BF4] in the dehydration experiment. The industrial‐scale CH3Cl capture and dehydration process was simulated and optimized. Compared to the benchmarked triethylene glycol process, IL process has higher product purity (99.99 wt%), and lower energy consumption. The quantum chemical calculations clearly revealed the relationship between hydrogen bond and separation performance. This study provides a decision‐making basis for designing green process associated with volatile organic compounds.

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“…Volatile organic compounds (VOCs) are usually organic compounds with a boiling point below 250 °C under atmospheric pressure. The emissions of volatile organic gas have increased dramatically in recent years with the rapid development of modern industries. − Most of the VOCs cause environmental damage, such as to the ozone layer, and compromise human health because of their toxicity and carcinogenicity. The main source of VOCs is the auto tail gas from, for example, coal combustion, coatings, building materials, and manufacturing.…”

Section: Introductionmentioning

confidence: 99%

“…The main source of VOCs is the auto tail gas from, for example, coal combustion, coatings, building materials, and manufacturing. Toluene is a solvent commonly used in the chemical industry. − However, it is an important component in the formation of photochemical smog. In addition, it is an irritant to the human body (e.g., mucous membrane and skin); also, it is harmful to the central nervous system.…”

Section: Introductionmentioning

confidence: 99%

Rational Design of Bimetal Mn-Ce Nanosheets Anchored on Porous Nano-sized ZSM-5 Zeolite for Adsorption-Enhanced Catalytic Oxidation of Toluene

Xiao

Wang

et al. 2022

Ind. Eng. Chem. Res.

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Catalytic oxidation is one of the most promising methods to remove toluene; manganese-cerium catalysts have high activity in the catalytic oxidation of toluene. Herein, nano-sized ZSM-5 was synthesized using a simple hydrothermal method, and catalysts with different Mn and Ce contents were prepared via alcohol-induced redox precipitation at room temperature. In addition, zeolite provides sufficient surface area for the dispersion of manganese cerium catalysts and plays a role in concentration and enrichment in the catalytic conversion of toluene. Based on the experimental characterization results, the 20Ce/M1Z1 catalyst exhibited the best catalytic activity, achieving 90% toluene conversion at 215 °C. Moreover, the catalyst still has excellent catalytic activity in humid environments. This work provides a new strategy to expose more active sites and enhance toluene adsorption, which provides a reference for the development of more efficient catalysts in the future.

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A mathematical model for VOCs removal in a treatment process coupling absorption and biodegradation

Cited by 27 publications

References 41 publications

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Ionic liquids for highly efficient methyl chloride capture and dehydration

Rational Design of Bimetal Mn-Ce Nanosheets Anchored on Porous Nano-sized ZSM-5 Zeolite for Adsorption-Enhanced Catalytic Oxidation of Toluene

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