TY - JOUR
T1 - Surface-Functionalized Superparamagnetic Nanoparticles (SPNs) for Enhanced Oil Recovery
T2 - Effects of Surface Modifiers and Their Architectures
AU - Khalil, Munawar
AU - Aulia, Ghufran
AU - Budianto, Emil
AU - Mohamed Jan, Badrul
AU - Habib, Saiful Hafiz
AU - Amir, Zulhelmi
AU - Abdul Patah, Muhamad Fazly
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/12/17
Y1 - 2019/12/17
N2 - Superparamagnetic nanoparticles (SPNs) have been considered as one of the most studied nanomaterials for subsurface applications, including in enhanced oil recovery (EOR), due to their unique physicochemical properties. However, a comprehensive understanding of the effect of surface functionalization on the ability of the nanoparticles to improve secondary and tertiary oil recoveries remains unclear. Therefore, investigations on the application of bare and surface-functionalized SPNs in EOR using a sand pack were carried out in this study. Here, the as-prepared SPNs were functionalized using oleic acid (OA) and polyacrylamide (PAM) to obtain several types of nanostructure architectures such as OA-SPN, core-shell SPN@PAM, and SPN-PAM. Based on the result, it is found that both the viscosity and mobility of the nanofluids were significantly affected by not only the concentration of the nanoparticles but also the type and architecture of the surface modifier, which dictated particle hydrophilicity. According to the sand pack tests, the nanofluid containing SPN-PAM was able to recover as much as 19.28% of additional oil in a relatively low concentration (0.9% w/v). The high oil recovery enhancement was presumably due to the ability of suspended SPN-PAM to act as a mobility control and wettability alteration agent and facilitate the formation of a Pickering emulsion and disjoining pressure.
AB - Superparamagnetic nanoparticles (SPNs) have been considered as one of the most studied nanomaterials for subsurface applications, including in enhanced oil recovery (EOR), due to their unique physicochemical properties. However, a comprehensive understanding of the effect of surface functionalization on the ability of the nanoparticles to improve secondary and tertiary oil recoveries remains unclear. Therefore, investigations on the application of bare and surface-functionalized SPNs in EOR using a sand pack were carried out in this study. Here, the as-prepared SPNs were functionalized using oleic acid (OA) and polyacrylamide (PAM) to obtain several types of nanostructure architectures such as OA-SPN, core-shell SPN@PAM, and SPN-PAM. Based on the result, it is found that both the viscosity and mobility of the nanofluids were significantly affected by not only the concentration of the nanoparticles but also the type and architecture of the surface modifier, which dictated particle hydrophilicity. According to the sand pack tests, the nanofluid containing SPN-PAM was able to recover as much as 19.28% of additional oil in a relatively low concentration (0.9% w/v). The high oil recovery enhancement was presumably due to the ability of suspended SPN-PAM to act as a mobility control and wettability alteration agent and facilitate the formation of a Pickering emulsion and disjoining pressure.
UR - http://www.scopus.com/inward/record.url?scp=85076242165&partnerID=8YFLogxK
U2 - 10.1021/acsomega.9b03174
DO - 10.1021/acsomega.9b03174
M3 - Article
AN - SCOPUS:85076242165
SN - 2470-1343
VL - 4
SP - 21477
EP - 21486
JO - ACS Omega
JF - ACS Omega
IS - 25
ER -