Experimental Study on the Absorption of Toluene from Exhaust Gas by Paraffin/Surfactant/Water Emulsion

Fang, Ping; Tang, Zilong; Chen, Xiong-Bo; Tang, Zhixiong; Chen, Ding-Sheng; Huang, Jiankang; Zeng, Wenhao; Cen, Chaoping

doi:10.1155/2016/9385027

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…Hariz et al 14 studied the absorption process of toluene using vegetable oil−water as absorber. Fang et al 15 developed a new paraffin/ surfactant/water emulsion for controlling volatile organic compounds, and the results indicated that the paraffin/ surfactant/water emulsion has great prospect in organic waste gas treatment with the advantages of economy, high efficiency, and safety. Propylene carbonate 16,17 is a colorless, transparent liquid, which is an excellent organic solvent and intermediate for the synthesis of fine chemicals.…”

Section: Introductionmentioning

confidence: 99%

Isobaric Vapor–liquid Equilibrium for Three Binary Systems of Ethyl Acetate + Propyl Acetate, Ethyl Acetate + Propylene Carbonate, and Propyl Acetate + Propylene Carbonate at 101.3 kPa

Liu

Zhang

et al. 2018

J. Chem. Eng. Data

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In this work, the isobaric vapor−liquid equilibrium (VLE) data for ethyl acetate + propyl acetate, ethyl acetate + propylene carbonate, and propyl acetate + propylene carbonate systems were measured at a pressure of 101.3 kPa by a modified Rose vapor recirculating-type equilibrium still. The experimental results show that no azeotrope was detected between the three binary systems. Two thermodynamic consistency tests of Herington and van Ness were employed to check the experimental data, respectively. The measured VLE data were correlated by Wilson, universal quasichemical, and nonrandom two-liquid models. The calculated root-mean-square deviation values of the equilibrium temperature and vapor phase mole fractions are not more than 1.07 and 0.0113, respectively. The relative volatilities were calculated and the deviations between the experimental data and Wilson model calculations were compared. All the correlated results are in good agreement with the measured data. Meanwhile, the binary interaction parameters were regressed by the three models for all the binary systems.

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Section: Introductionmentioning

confidence: 99%

Isobaric Vapor–liquid Equilibrium for Three Binary Systems of Ethyl Acetate + Propyl Acetate, Ethyl Acetate + Propylene Carbonate, and Propyl Acetate + Propylene Carbonate at 101.3 kPa

Liu

Zhang

et al. 2018

J. Chem. Eng. Data

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“…Various volatile organic compounds (VOCs) are produced in the petrochemical industry, including benzene, dichloromethane, acetone, and phenol [1,2]. To date, more and more attention has been paid to the treatment of dichloromethane and benzene because they are highly toxic, leading to the risk of human cancer [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The Absorption Performance of Ionic Liquids–PEG200 Complex Absorbent for VOCs

et al. 2021

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A novel complex absorbent composed of polyethylene glycol 200 (PEG200) and ionic liquids (ILs) was prepared for the absorption of volatile organic compounds (VOCs) such as dichloromethane (DCM) and benzene. We prepared complex absorbents composed of [EMIM][Cl], [BMIM][Cl], [HMIM][Cl], [BMIM][BF4], [BMIM][PF6], [BMIM][NTF2], and PEG200, respectively, and studied the absorption properties of these six complex absorbents for DCM and benzene. The results show that under the optimized situation, the absorptivity of [HMIM][Cl]–PEG200 complex absorbent for DCM is 85.46% in the first 5 min, and 87.15% for benzene. No obvious decay in the absorptivity of [HMIM][Cl]–PEG200 for DCM and benzene was observed in five cycles, indicating an impressive regeneration performance. Furthermore, the mechanism of ionic liquid absorption for VOC is explored by thermodynamic analysis and quantum chemical calculations. The theoretical calculation results show that the [HMIM][Cl]–DCM interaction is stronger than the [HMIM][Cl]–benzene interaction, which is consistent with the results of the absorption experiment. Moreover, the strong hydrogen bonds can be formed between both [HMIM][Cl]–DCM and [HMIM][Cl]–benzene.

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“…As the definition of VOC is somewhat extensive, VOCs encompass diverse classes of organic compounds such as alkanes, aromatics, aldehydes, ketones, alcohols and ethers, and the physicochemical properties of these compounds are all different (Fang, P. et al, 2016;Hodgson, M. et al,1994). However, a common characteristic of the VOCs is that the chemical group could be readily evaporated at room temperature.…”

Section: Properties Of Vocsmentioning

confidence: 99%

Measurement and analysis of toxic volatile organic compounds (VOC) and polycyclic aromatic hydrocarbons (PAH) at Singapore's integrated transport hubs (ITH)

Lee¹

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Millions of commuters should spend time waiting for their buses at bus interchanges every day in Singapore. Environmental exposure to vehicular emissions at transport hub and associated risks are of public concern. To date, limited studies have focused on the indoor air quality at Integrated Transport Hubs (ITHs), which are fully air-conditioned bus interchanges adjoined with subway stations and commercial facilities.In this study, 12 representative Volatile Organic Compounds (VOCs) and 16 EPA priority pollutant Polycyclic Aromatic Hydrocarbons (PAHs) were selected, collected from 9 bus interchanges at both indoor waiting area and bus park sampling points, and then analyzed.The daily VOCs and PAHs exposure for commuters were estimated by considering inhalation and dermal doses using Monte Carlo simulation (n=100,000), and human health risks for the exposure to selective pollutants were further evaluated.The median concentration of total VOCs (TVOCs), total gaseous PAHs (TgPAHs) and total particulate-bound PAHs (TpPAHs) in indoor areas were 30.42 µg/m 3 , 18.99 ng/m 3 and 1.38 ng/m 3 , respectively. Besides, the median concentrations for bus parks were 20.24 µg/m 3 , 24.26 ng/m 3 and 1.94 ng/m 3 in sequence. In general, the pollutant concentration levels were not significantly different between waiting areas and bus parks, but showed positive correlations (TVOCs: r = 0.90 , p < 0.001; TgPAHs: r = 0.75, p < 0.001; TpPAHs: r = 0.39, p < 0.05), suggesting some air exchange dependency between the spaces. The high correlations between VOCs and gPAHs components were found, which implied the bus exhaust might be the dominant source of the pollutants. The indoor waiting area to bus park pollutant concentration ratio (I/B ratio), a new indicator representing the concentration relationship between indoor and bus park samples, was calculated for each pollutant group, and lower I/B ratios of pollutants were found (TVOCs: 0.98; TgPAHs: 0.76; TpPAHs: 0.71) in the bus interchanges with fully sheltered bus parks than those with open/partially enclosed bus parks (TVOCs: 1.28; TgPAHs: 1.31; TpPAHs: 0.90).The findings in this study imply that the fully sheltered bus park may affect the dilution of air pollutants resulting in the accumulation in adjacent indoors.From the result of the dose estimation, it was found that inhalation was the dominant exposure route of VOCs accounted for 99%, while dermal absorption was the major route of PAHs accounted for 82%. Most concentration levels of VOCs at Singapore's ITHs were found to be below EPA's reference concentrations (RfC) except for naphthalene, but the maximum concentration was less than the twice of its safety benchmark. However, vi benzene, ethylbenzene, styrene and naphthalene exceed the stringent OEHHA benchmarks, as similar to other countries' reports. The concentration levels of PAHs at ITHs were found to be within their safety benchmarks through the estimation of Incremental Lifetime Cancer Risk (ILCR) for carcinogenic risk and the comparison with EPA's RfC for noncarcinogenic r...

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Experimental Study on the Absorption of Toluene from Exhaust Gas by Paraffin/Surfactant/Water Emulsion

Cited by 13 publications

References 27 publications

Isobaric Vapor–liquid Equilibrium for Three Binary Systems of Ethyl Acetate + Propyl Acetate, Ethyl Acetate + Propylene Carbonate, and Propyl Acetate + Propylene Carbonate at 101.3 kPa

Isobaric Vapor–liquid Equilibrium for Three Binary Systems of Ethyl Acetate + Propyl Acetate, Ethyl Acetate + Propylene Carbonate, and Propyl Acetate + Propylene Carbonate at 101.3 kPa

The Absorption Performance of Ionic Liquids–PEG200 Complex Absorbent for VOCs

Measurement and analysis of toxic volatile organic compounds (VOC) and polycyclic aromatic hydrocarbons (PAH) at Singapore's integrated transport hubs (ITH)

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