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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Surfactant adsorption in enhanced oil recovery ： ウィキペディア英語版 Surfactant adsorption in enhanced oil recovery Surfactant adsorption is one of the significant problems of enhanced oil recovery (EOR) operations. One method of enhanced oil recovery (the extraction of previously unobtainable petroleum from an oil deposit using non-traditional methods) is the injection of surfactants into the field to lower interfacial tension, change the wettability, and control mobility in order to increase the amount of oil recovered from a previously water-flooded reservoir. One of the main challenges in this process is the loss of surfactant due to adsorption on formation rocks. In fact, high adsorption of surfactant can make the chemical EOR processes economically-unfeasible. ==Problem description== The net charge of most typical rock/mineral surfaces is strongly dependent on pH; that is, above a certain pH known as point of zero charge (pHpzc), the net charge of the surface is negative and below this pH the surface charge is positive. The first adsorbed layer of surfactant is mostly governed by electrostatic attraction. Once this first adsorbed patch forms on the surface, a second layer of surfactant may be adsorbed by surfactant tail-tail hydrophobic interactions at high anionic surfactant concentrations. Adsorption of this second layer helps to change the net surface charge to negative, thereby, repelling further anionic surfactant molecules and saturating the adsorption. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Surfactant adsorption in enhanced oil recovery」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.