首页|A new image-based microfluidic method to test demulsifier enhancement of coalescence-rate,for water droplets in crude oil
A new image-based microfluidic method to test demulsifier enhancement of coalescence-rate,for water droplets in crude oil
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NSTL
The separation of water droplets from water-in-crude-oil emulsions is a vital process in the petroleum industry.Various components in crude oil,such as asphaltene,stabilize the water-oil interface,which inhibits the coalescence of water droplets.To enhance the oil-water separation,specific demulsifiers are often added to destabilize the emulsion and enhance the coalescence of the water droplets.In this work,we propose a new method to select an effective demulsifier and optimal concentration for a water-in-crude oil emulsion.This new experimental design involves an optical-access flow in a long 500 μm-square micro-fluidic channel,illuminated by a Near-Infrared laser and imaged with a B/W high-speed video camera.We can quantify the coalescence probability by using monodisperse droplets and identifying coalescence by their change in size.Coalescence probability is an indicator for selecting the optimal concentration and type of demulsifier.
Crude oilCoalescenceDemulsifierWater separation
Yuan Si Tian、Zi Qiang Yang、Sigurdur T.Thoroddsen
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Key Laboratory of Road Construction Technology and Equipment of Ministry of Education,School of Construction Machinery,Chang'an University,Xi'an 710064,China
Division of Physical Sciences and Engineering,King Abdullah University of Science and Technology(KAUST),Thuwal 23955-6900,Saudi Arabia
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