Investigation of novel extracted surfactant on rheological properties of heavy crude oil. (2017)

• Record Type: Journal Article
• Authors: Kumar, Ravindra; Banerjee, Shirsendu; Mandal, Ajay; Naiya, Tarun Kumar
• Is Part Of: International journal of oil, gas and coal technology. Volume 14:Number 4(2017)
• Page Start: 354
• Page End: 368
• Publication Date: 2017
• Subjects: Madhuca longifolia -- viscosity -- complex modulus -- microscopic study -- yield stress -- viscoelastic behaviour -- FTIR -- naturally extracted surfactant -- rheological properties -- heavy crude oil -- rheology -- tropical plants -- India -- fluid flow -- oil pipelines -- pour point -- SARA analysis -- power law model -- wax crystals -- aldehydic groups -- amine groups; Petroleum as fuel -- Periodicals; Gas as fuel -- Periodicals; Coal -- Periodicals; Biomass energy -- Periodicals; Hydrogen as fuel -- Periodicals; 662.6
• Languages: English
• ISSNs: 1753-3309

Abstract

Naturally extracted surfactant from tropical Indian plant Madhuca longifolia was used to enhance flow properties of heavy crude oil through pipelines. Experimental measurements include viscosity, yield stress, viscoelastic properties, pour point, SARA analysis, microscopic studies and FTIR studies. Experimental verification of Power Law model was justified. Crude oil surfactant mixtures tend to behave like Newtonian fluid as surfactant concentration was increased from 500 to 2, 000 ppm. Viscosity of crude with 2, 000 ppm surfactant at 30°C was almost same as that of pure crude at 50°C. Presence of surfactant significantly reduced elastic and complex moduli of heavy crude oil at 30°C. Yield stress of crude oil reduced from 0.9 to 0.017 Pa with surfactant addition at 30°C. Microscopic studies showed surfactant addition reduced size of wax crystals appreciably. FTIR studies implied that aldehydic and amine groups are responsible for high viscosity and their concentration reduced after addition of surfactant Madhuca longifolia. [Received: August 4, 2015; Accepted: November 28, 2015]