eprintid: 3767 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/00/37/67 datestamp: 2023-11-09 15:52:02 lastmod: 2023-11-09 15:52:02 status_changed: 2023-11-09 15:47:34 type: article metadata_visibility: show creators_name: Zaid, H.M. creators_name: Yahya, N. creators_name: Latiff, N.R.A. title: The effect of nanoparticles crystallite size on the recovery efficiency in dielectric nanofluid flooding ispublished: pub keywords: Core flooding; Emulsification process; Enhanced oil recovery; EOR methods; Fluid motions; Metal oxide nanoparticles; Nanofluids; Oil recoveries; Original oil in places; Particles sizes; Recovery efficiency; Reservoir rock; Sodium dodecyl sulfate solutions; Spontaneous emulsification; Substantial reduction; Surfactant flooding; Ultralow interfacial tension; ZnO; ZnO nanoparticles, Emulsification; Enhanced recovery; Floods; Metal nanoparticles; Metallic compounds; Petroleum reservoir engineering; Petroleum reservoirs; Recovery; Reservoirs (water); Sodium; Sodium sulfate; Zinc oxide, Nanofluidics note: cited By 42 abstract: Application of nanotechnology in enhanced oil recovery (EOR) has been increasing in recent years. After secondary flooding, more than 60 of the original oil in place (OOIP) remains in the reservoir due to trapping of oil in the reservoir rock pores. One of the promising EOR methods is surfactant flooding, where substantial reduction in interfacial tension between oil and water could sufficiently displace oil from the reservoir. In this research, instability at the interfaces is created by dispersing 0.05 wt ZnO nanoparticles in aqueous sodium dodecyl sulfate (SDS) solution during the core flooding experiment. The difference in the amount of particles adsorbed at the interface creates variation in the localized interfacial tension, thus induces fluid motion to reduce the stress. Four samples of different average crystallite size were used to study the effect of particle size on the spontaneous emulsification process which would in turn determine the recovery efficiency. From the study, ZnO nanofluid which consists of larger particles size gives 145 increase in the oil recovery as compared with the smaller ZnO nanoparticles. In contrast, 63 more oil was recovered by injecting Al2O3 nanofluid of smaller particles size as compared to the larger one. Formation of a cloudy solution was observed during the test which indicates the occurrence of an emulsification process. It can be concluded that ultralow Interfacial tension (IFT) value is not necessary to create spontaneous emulsification in dielectric nanofluid flooding. © (2013) Trans Tech Publications, Switzerland. date: 2013 official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872345587&doi=10.4028%2fwww.scientific.net%2fJNanoR.21.103&partnerID=40&md5=6b7534a1ebfe54f08e193823a0ae40e5 id_number: 10.4028/www.scientific.net/JNanoR.21.103 full_text_status: none publication: Journal of Nano Research volume: 21 pagerange: 102-108 refereed: TRUE issn: 16625250 citation: Zaid, H.M. and Yahya, N. and Latiff, N.R.A. (2013) The effect of nanoparticles crystallite size on the recovery efficiency in dielectric nanofluid flooding. Journal of Nano Research, 21. pp. 102-108. ISSN 16625250