Membrane Separates Crude Oil at Room Temperature
A bare polyacrylonitrile membrane offers a lower-energy alternative to conventional heat-driven crude oil fractionation.
Updated on Nov. 10, 2026 in Oil and Gas
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Researchers developed a bare polyacrylonitrile membrane that separates crude oil fractions at room temperature, avoiding the high heat used in conventional distillation. The membrane delivers crude oil permeation rates about 23 times higher than previously reported state-of-the-art crude oil membranes.
Why it matters
Crude oil refining is energy-intensive, and a room-temperature separation step could reduce the fuel and emissions tied to fractionation. Process simulations suggest the approach could lower both operating costs and environmental impact for refineries.
Laboratory tests showed a permeation rate about 23 times higher than prior crude oil membranes, with stable performance over 28 consecutive days. Process simulations project 36% lower operating costs, though these are modeled rather than measured at refinery scale.
The players
Korea Advanced Institute of Science and Technology (KAIST)
A leading South Korean public research university that co-authored the membrane study.
Georgia Institute of Technology
A major public research university in Atlanta whose researchers co-authored the membrane study.
MIT
The Massachusetts Institute of Technology, which reported a prior membrane approach to crude oil fractionation in 2025.
The details
Crude oil is passed directly through a bare porous polyacrylonitrile membrane at room temperature, and heavy hydrocarbons gradually stick to the pore walls, narrowing them into separation channels smaller than 2 nanometers. The approach avoids temperatures near 350 °C (662 F) used in conventional separation.
Timeline
2025: MIT engineers reported a membrane approach that could reduce fractionation energy by as much as 90%.
2026: A KAIST and Georgia Tech study on the crude oil membrane was published in Nature.
Industry Trajectory
The work extends MIT's 2025 report that membrane-based fractionation could cut separation energy by as much as 90%, and it is one of several efforts to move refining away from heat-intensive distillation. Its reported 23-fold permeation gain over earlier crude oil membranes marks a measurable step within that research direction.
If adopted, refineries could add a modular filtration unit as a retrofit rather than rebuilding distillation columns. The technology is still at the research stage, so its effect on fuel prices or refinery jobs is not yet known.
The takeaway
Lower-temperature separation could cut refining energy and emissions, but the savings so far come from simulations and need industrial validation. Watch for pilot-scale results before assuming large changes to refinery operations.
Further reading
For broader context on refining technology, see Oil and Gas.
Source note: This article includes information reported by OilPrice.
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