Removal and coalescence of oil droplets in oily wastewater by nanofibrous membrane filtration

Sang, Yimin; Lu, Taotao; Wang, Shuguang; Han, Yanhe; Wang, Feiyu; Yu, Tao

doi:10.1039/d2ew00330a

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2023

2024

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“…Coalescence separation is a physical method that utilizes the difference in the affinity of oil-water on coalescence materials such as polypropylene fibers and hydrophilic glass fibers, achieving demulsification and growth of emulsified droplets, and finally realizing oil-water separation by gravity, which has been a research hotspot in the field of oil-water emulsion separation in recent years [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Removal of Organochlorine Compounds from Coal Tar by Nucleophilic Substitution and Coalescence

Du,

Gao,

2023

Chem Eng & Technol

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An integrated process of phase transfer nucleophilic substitution and coalescence is proposed to upgrade coal tar by simultaneously removing organochlorine compounds (OOCs) and water. For the phase transfer catalysts (PTCs) and nucleophiles, polyethylene glycol 400 (PEG‐400) and triethanolamine (TEOA) were the most effective to remove OOCs from coal tar. The optimal parameters of the dichlorination process in terms of molar ratio of PEG‐400 and TEOA to OOCs, reaction temperature, reaction time, and stirring speed were determined. The chloride removal efficiency reached 80.66 % when glass fiber was used for oil‐water coalescence separation. A promising method for simulllltaneously removing chloride and water from coal tar is provided.

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Section: Introductionmentioning

confidence: 99%