Removal of Vaporous Naphthalene Using Polyoxyethylenated Nonionic Surfactants

Huang, Haibo; Lee, Whei‐May Grace

doi:10.1080/10473289.2003.10466246

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…Tseng et al () modified the desulfurization sorbents with surfactants showing different effects on the removal of PAHs, BTEX, and heavy metals and exploited the potential of calcium hydroxide sorbents for adsorbing air pollutants other than SO 2 . Huang and Lee ( − ) examined the enhancement in solubility of vapor naphthalene, CO 2 , and SO 2 in the presence of surfactants and suggested that these findings could be employed to develop a new control process for the toxic air pollutants by spray or packed column.…”

Section: Introductionmentioning

confidence: 99%

Efficient Control System for Low-Concentration Inorganic Gases from a Process Vent Stream: Application of Surfactants in Spray and Packed Columns

Chein

Aggarwal

2004

Environ. Sci. Technol.

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Control of low-concentration pollutants from a semiconductor process vent stream using a wet-scrubbing technique is a challenging task to meet Taiwan environmental emission standards. An efficient wet-scrubber is designed on a pilot scale and tested to control low concentration acid and base waste-gas emission. The scrubber system consisted of two columns, i.e., a fine spray column [cutoff diameter (based on volume), D v (50) ) 15.63 µm; Sauter mean diameter (SMD) ) 7.62 µm], which is especially efficient for NH 3 removal as the pH of the spraying liquid is ≈ 7 followed by a packed column with a scrubbing liquid pH ≈ 9.0 mainly for acids removal. It is observed that use of the surfactants in low concentration about 10 -4 M and 10 -7 M in the spray liquid and in the scrubbing liquid, respectively, remarkably enhances the removal efficiency of the system. A traditional packed column (without the spray column and the surfactant) showed that the removal efficiencies of NH 3 , HF, and HCl for the inlet concentration range 0.2 to 3 ppm were (n ) 5) 22.6 ( 3.4%, 43.4 ( 5.5%, and 40.4 ( 7.4%, respectively. The overall efficiencies of the proposed system (the spray column and the packed column) in the presence of the surfactant in the spray liquid and in the scrubbing liquid for these three species were found to increase significantly (n ) 5) from 60.3 ( 3.6 to 82.8 ( 6.8%, 59.1 ( 2.7 to 83.4 ( 4.2%, and 56.2 ( 7.3 to 81.0 ( 6.7%, respectively. In this work, development of charge on the gas-liquid interface due to the surfactants has been measured and discussed. It is concluded that the presence of charge on the gas-liquid interface is the responsible factor for enhancement of the removal efficiency (mass-transfer in liquid phase). The effects of the type of surfactants, their chain length, concentration in liquid, etc. on the removal efficiency are discussed. Since the pilot tests were performed under the operating conditions similar to most of the wet-scrubbers operated in semiconductors manufacturing facilities for inorganic pollutants, this study can be applied to modify the existing wet-scrubbers to enhance the removal efficiencies, especially for low-concentration pollutants.

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Section: Introductionmentioning

confidence: 99%

Efficient Control System for Low-Concentration Inorganic Gases from a Process Vent Stream: Application of Surfactants in Spray and Packed Columns

Chein

Aggarwal

2004

Environ. Sci. Technol.

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Effect of wash oil inlet temperature in naphthalene scrubber on the absorptivity of naphthalene in coke oven by product plant

Banerjee

Agarwal

Dash

et al. 2021

Thermal Science and Engineering Progress

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Screening method for solvent selection used in tar removal by the absorption process

Masurel

Authier²,

Castel

et al. 2015

Environmental Technology

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The aim of this paper is the study of the treatment of flue gas issued from a process of biomass gasification in fluidized bed. The flue gas contains tar which should be selectively removed from the fuel components of interest (e.g. H2, CO and light hydrocarbons) to avoid condensation and deposits in internal combustion engine. The chosen flue gas treatment is the gas-liquid absorption using solvents, which present specific physicochemical properties (e.g. solubility, viscosity, volatility and chemical and thermal stability) in order to optimize the unit on energetic, technico-economic and environmental criteria. The rational choice of the proper solvent is essential for solving the tar issue. The preselection of the solvents is made using a Hansen parameter in order to evaluate the tar solubility and the saturation vapour pressure of the solvent is obtained using Antoine law. Among the nine families of screened solvents (alcohols, amines, ketones, halogenates, ethers, esters, hydrocarbons, sulphured and chlorinates), acids methyl esters arise as solvents of interest. Methyl oleate has then been selected and studied furthermore. Experimental liquid-vapour equilibrium data using bubbling point and absorption cell measurements and theoretical results obtained by the UNIFAC-Dortmund model confirm the high potential of this solvent and the good agreement between experimental and theoretical results.

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Removal of Vaporous Naphthalene Using Polyoxyethylenated Nonionic Surfactants

Cited by 3 publications

References 27 publications

Efficient Control System for Low-Concentration Inorganic Gases from a Process Vent Stream: Application of Surfactants in Spray and Packed Columns

Efficient Control System for Low-Concentration Inorganic Gases from a Process Vent Stream: Application of Surfactants in Spray and Packed Columns

Effect of wash oil inlet temperature in naphthalene scrubber on the absorptivity of naphthalene in coke oven by product plant

Screening method for solvent selection used in tar removal by the absorption process

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