Scientists from ExxonMobil Corp. (Irving, Tex.), the Georgia Institute of Technology and Imperial College of London have published joint research on potential breakthroughs in a new membrane technology that could reduce emissions and energy intensity associated with refining crude oil. Laboratory tests indicate the patent-pending membrane could be used to replace some heat-intensive distillation at refineries in the years ahead.
Results of the research were published today in the international peer-reviewed journal, Science.
“Through collaboration with strong academic institutions like Georgia Tech and Imperial, we are constantly working to develop the lower-emissions energy solutions of the future,” said Vijay Swarup, vice president of research and development at ExxonMobil Research and Engineering Company.
“Inspired by reverse osmosis technology that has reduced energy intensity tenfold for water purification, we decided to look into ways to use new materials for liquids separation, which if brought to industrial scale, could significantly reduce associated greenhouse gas emissions,” said Swarup. “This is one of many new materials ExxonMobil is researching to reduce energy intensity and CO2 in our operations.”
The research successfully demonstrated that naphtha and kerosene—the primary components of gasoline and jet fuel—can be separated from light crude oil using pressure instead of heat, reducing emissions and energy consumption significantly compared to traditional, heat-based distillation methods.
Since 2014, the team of scientists has worked to identify advanced membranes to separate light shale crude oil using significantly less energy than used in typical refining processes. In the gasoline and jet fuel range, the membranes developed by the team are twice as effective as the most selective commercial membranes in use today.
“This membrane technology was developed by a diverse team of scientists and engineers using a ‘multi-scale’ approach that ranges from the molecular-scale to realistic membrane devices,” said Ryan Lively, the John H. Woody faculty fellow and associate professor in Georgia Tech’s School of Chemical & Biomolecular Engineering.
“It’s rare that chemists have the chance to participate in both inventing new molecules and applying them to solve real-world problems. In this case, it really took a whole village of differing expertise to bring to fruition a new approach for separating the components of crude oil using much less energy than before,” said M.G. Finn, Chair of the School of Chemistry & Biochemistry at Georgia Tech and a joint lead of the study along with Lively.
Additional research and development will be needed to progress this technology to industrial scale.
“We have the foundational experience of bringing organic solvent nanofiltration, a membrane technology becoming widely used in pharmaceuticals and chemicals industries, to market,” said Andrew Livingston, professor of chemical engineering at Imperial. “We worked extensively with ExxonMobil and Georgia Tech to demonstrate the potential scalability of this technology.”
Since 2000, ExxonMobil has invested approximately $10 billion in projects to research, develop and deploy lower-emission energy solutions. The company also continues to expand collaborative efforts with more than 80 universities, five energy centers and multiple private sector partners around the world to explore next-generation energy technologies.
The researchers on the technology as written in Science include Neel Rangnekar, J.R. Johnson, Scott Hoy and Benjamin McCool from ExxonMobil; Kirstie Thompson, Ronita Mathias, Ryan Lively and M.G. Finn from Georgia Institute of Technology; Daeok Kim, Jihoon Kim, Irene Bechis, Andrew Tarzia and Kim Jelfs from Imperial College London; and Andrew Livingston, concurrently with Imperial and Queen Mary University of London.