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Indexed by:Journal Papers

Date of Publication:2015-08-01

Journal:JOURNAL OF CHEMICAL AND ENGINEERING DATA

Included Journals:SCIE、EI、Scopus

Volume:60

Issue:8

Page Number:2469-2476

ISSN No.:0021-9568

Abstract:The experiment utilizes a high-pressure view chamber that mainly aims at identifying the effect of surfactant architecture on solubility in CO,. First, when solubility pressures of three series of nonionic hydrocarbon surfactants are measured, results reveal that surfactants with a methylated tail exhibit the best solubility. Unexpectedly, surfactants with a branched tail show worse solubility than linear surfactants. This is conjectured to be caused by attractive molecule molecule interactions. TX45 that possesses the shortest ethylene oxide chain and a highly methylated tail performs the best in CO2 solubility. Additionally, the experimental study on the solubility of TX45 in CO2 at T = (318 to 343) K demonstrates that solubility has a direct correlation with pressure and CO2 density, while it is inversely related to temperature. Finally, when we look at effects of the added alcohols on surfactant TX45 solubility, the results indicate that hexanol is the most effective alcohol in enhancing solubility. The reason is assumed to be that hexanol molecules could insert themselves between surfactant tails and hinder molecule molecule interactions.