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[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020 Author(s).The decreasing of oil production has become the main factor for applying Enhanced Oil Recovery (EOR) methods in the oilfield. Chemical injection using surfactant was one of EOR technologies that had been proved to increase the oil recovery. In this study, surfactant was synthesized using palm oil as hydrophobic group and polyethylene-glycol as hydrophilic group. The use of natural oil as the raw material was preferred used due to its abundant and environmentally friendly. Esterification of nonionic surfactant was performed by utilizing the azeotrope technique (EtOAc-H2O) between oleic acid and polyethylene glycol (PEG) 400. The reaction was optimized by a various mole equivalent of oleic acid and PEG (1:1,1; 1:2,5; 1;3) in various reaction time. Surfactant product was characterized by thin-layer chromatography (TLC), acid value (AV), and ester value (ES) to determine the optimum condition and conversion rate. The molecular structure of surfactant was confirmed by 1H and 13C Nuclear Magnetic Resonance (1H and 13C NMR) and Mass Spectroscopy (MS). Then, nonionic surfactant was analyzed by measuring the interfacial tension (IFT) of oil and water. The optimum condition was achieved by reacting oleic acid and PEG at mole equivalent ratio of 1:3, 5 hours reaction time, and conversion rate of 93.7% mole. This nonionic surfactant was able to decrease the IFT of oil and water as low as 10-3 dyne/cm in brine salinity condition of 18000 ppm and oil 34,39oAPI.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][{‘$’: ‘This paper was the collaboration results of Research Centre for Oil and Gas Technology “LEMIGAS” and Organic Synthesis Laboratory of Chemistry, Bandung Institute of Technology. Special thanks to Prof. Yana Maulana Syah for NMR and MS measurement. The financial support from DIPA Research Center for Oil and Gas Technology “LEMIGAS” was fully acknowledged’}, {‘$’: ‘This paper was the collaboration results of Research Centre for Oil and Gas Technology ?LEMIGAS? and Organic Synthesis Laboratory of Chemistry, Bandung Institute of Technology. Special thanks to Prof. Yana Maulana Syah for NMR and MS measurement. The financial support from DIPA Research Center for Oil and Gas Technology ?LEMIGAS? was fully acknowledged’}][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1063/5.0002729[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]