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Indexed by:期刊论文

Date of Publication:2018-11-01

Journal:JOURNAL OF MOLECULAR LIQUIDS

Included Journals:SCIE

Volume:269

Page Number:23-28

ISSN No.:0167-7322

Key Words:CO2; Non-ionic surfactant; Extraction; Material exchange

Abstract:The effects of some designed non-ionic surfactants (Guerbet alkyl polyoxyethylene ethers and linear alkyl polyoxyethylene ethers) on the exchange of materials between crude oil and scCO(2) were investigated at 359 K. The efficiency of the surfactants was demonstrated by extraction tests, volume change rate tests and compositional analysis of the produced oil. Firstly, extraction tests have shown that the addition of these surfactants can help scCO(2) extract more crude oil. Secondly, adding these surfactants significantly increased the volume change rate of the oil droplets. At 15 MPa, the addition of C16(3) increased the volume change rate from 15.862% to 20.165%, indicating more materials were extracted from the oil drop. Finally, by analyzing the recovered oil content, we found that surfactants can promote the exploitation of crude oil. C16(3) + CO2 can recover more short-chain alkanes (C5-C20) than CO2. (C) 2018 Elsevier B.V. All rights reserved.