Toward Efficient Demulsification of Produced Water in Oilfields: Solar STEP Directional Degradation of Polymer on Interfacial Film of Emulsions
Toward Efficient Demulsification of Produced Water in Oilfields: Solar STEP Directional Degradation of Polymer on Interfacial Film of Emulsions
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DOI：
10.1021/acs.energyfuels.6b01539
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发表时间：
2016-10
期刊：
影响因子：
5.3
通讯作者：
Chunhong Nie;Lu Xu;D. Gu;Guangsheng Cao;Ruixia Yuan;Baohui Wang
中科院分区：
文献类型：
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作者：
Chunhong Nie;Lu Xu;D. Gu;Guangsheng Cao;Ruixia Yuan;Baohui Wang
由于存在高浓度的残余PAM（聚丙烯酰胺），采用常规处理工艺对采出水进行硬性处理，达到回注或排放标准。本文初步分析了PAM在油田废水乳化中的作用；然后，对pam增强乳状液的油水界面结构进行了图解。在揭示事实的基础上，将破乳的关键机理归结为PAM在乳剂界面膜上的临界破乳。为了高效破乳驱聚采出水，实现废水的绿色、可持续修复，提出并开发了一种面向乳液界面膜聚合物的STEP （solar thermal electrochemical process）定向降解方法。结果表明，STEP聚合物降解使得PAM氧化所需的热力学势从1.206 V降低到0.979 V。
Because of the existence of high concentration of residual PAM (polyacrylamide), the produced water is toughly treated to reach reinjection or discharge standards by a routine treatment process. In this paper, an action and role of PAM was initially analyzed on the emulsification of the oilfield wastewater; then, an oil/water interface structure of PAM-reinforced emulsions was schematically illustrated. Based on revealing the facts, the key mechanism of the demulsification was focused on the critically breaking of PAM on interfacial film of emulsions. Herein, a STEP (solar thermal electrochemical process) directional degradation of polymer on interfacial film of emulsions was proposed and developed for the efficient demulsification of the polymer-flooding produced water in favor of green and sustainable remediation of wastewater. The results demonstrated that the STEP polymer degradation allows the requisite thermodynamic potential of PAM oxidation to be lowered from 1.206 to 0.979 V experimentally due to...