Paraffin Oil Emulsions for the Absorption of Toluene Gas. Issue 8 (9th May 2016)

• Record Type: Journal Article
• Authors: Qi, Min; Wu, Xiankun; Zhang, Feng; Zhang, Juan; Wang, Yueyang; Zhang, Zhibing; Chen, Qiang
• Is Part Of: Chemical engineering & technology. Volume 39:Issue 8(2016:Aug.)
• Page Start: 1438
• Page End: 1444
• Publication Date: 2016-05-09
• Subjects: Absorption -- Emulsion -- Paraffin oil -- Toluene -- Volatile organic compounds; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201500243
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: Water‐in‐oil‐in‐water (W/O/W) and water‐in‐oil (W/O) emulsions of paraffin oil were prepared with sorbitan monooleate (Span 80)/polyoxyethylene sorbitan monooleate (Tween 80) or polyethylene glycol monostearate (SG‐6), respectively. The physical characteristics and the absorption of toluene gas in these emulsions were investigated to evaluate the influence of the emulsifier dosage and the oil/water ratio. Both investigated W/O/W emulsions provided high stabilities and low viscosities. The absorption of toluene gas was excellent, with little foam occurring during the absorption. Although the W/O emulsions with 2–5 % SG‐6 were of high stability, their high viscosities strongly limited their application as volatile organic compound absorbents. Stable emulsions consisted of small and uniform droplets and some emulsions underwent mild demulsification after the absorption. Abstract : Water‐in‐oil‐in‐water emulsions of paraffin oil were prepared with the emulsifiers Span 80/Tween 80 to obtain industrially safe and usable absorbents for the scrubbing of volatile organic compounds. A higher oil/water ratio benefits the removal ratio of toluene gas, while the emulsifier amount slightly affects the absorption.