Waterless oil sands extraction
One of the greatest challenges in mining is
waste—specifically, tailings ponds. Toxic in high concentrations, tailings are
a lingering byproduct of the water-based processes used to separate resources
from the ore. Northern Alberta’s massive oil sands operations play a key role
in Canada’s economic prosperity and in fuelling society, but no permanent
solution has been discovered to efficiently deal with the tailings created by
oil sands mining operations, so the tailings accumulate in large ponds.
For more than a decade, the University of Alberta has been a
world leader in exploring, through partnerships with oil sands producers and
government, ways to solidify and reclaim these ponds. The university is also
researching ways to eliminate tailings ponds completely. Nonaqueous extraction
means separating oil from sand without the use of water and avoids the
resulting tailings production and storage. Instead, organic solvents could directly
extract the oil and allow the dry sand and clay to be stacked back in the mine
In pursuit of this goal, the U of A has become a recognized
centre of oil sands extraction and of interfacial and surface engineering. The
university has built teams of respected researchers passionate about solving
society’s problems and responsibly developing our resources, along with
world-class research facilities in which to carry out their work.
Research facilities supporting nonaqueous extraction and
tailing management include:
Institute for Oil Sands Innovation (IOSI) was established in 2005 in partnership
with Imperial Oil and the University of Alberta Faculty of Engineering to find
breakthrough technologies for oil sands processing. To date, IOSI has total
funding amounting to $51-million and a growing list of partners including
Imperial Oil, Alberta Innovates – Energy and Environment Solutions, the Faculty
of Engineering, Canada’s Oil Sands Innovation Alliance (COSIA), NRC, NRCan and NSERC.
IOSI supports more than 160 top researchers around the world including those
working to minimize or eliminate the use of water in oil sands extraction.
Sands and Coal Interfacial Engineering Facility is focused on bitumen
characterization research, improved processes for oil sands extraction,
modelling interfacial and transport behaviour of colloidal suspensions and
emulsions and novel coal cleaning technology.
The Oil Sands
Tailings Research Facility, located in Devon, Alberta,
supports fundamental tailings research at a pilot scale (600 and 2000 kg solids
per hour) and accommodates multiple, concurrent interdisciplinary research projects.
It is led by Dr. Ward
Wilson, NSERC Industrial Research Chair in Oil Sands
Tailings Geotechnique, a world leader in mine waste management systems.
Centre for Clean Coal/Carbon and Mineral Processing Technologies (C5MPT) is Canada’s first research and
education centre that supports low impact mineral resource development. C5MPT
is supported by government and industry partners: Capital Power Corporation, Teck Resources Limited, Hatch Ltd.,
Nexen Energy ULC, CMG Reservoir Simulation Foundation, Glencore Canada
Corporation, Mancal Corporation, and Alberta Innovates – Energy and Environment
Leading researchers in nonaqueous extraction include:
(Chad) Liu is scientific director of C5MPT and a co-leader in
the Sino-Canadian Energy and Environment Research and Education Initiative
(SCENEREI), a partnership between the University of Alberta and Tsinghua
University in China. Researchers at these two leading universities are developing
innovative and efficient technologies that will help address global issues of
the impact of energy production on the environment.
Xu is the Canada Research Chair in Minerals Processing and holds the NSERC
Industrial Research Chair in Oil Sands Engineering. His research addresses oil
sands processing, fine particle processing, interfacial phenomena and
engineering nanoparticles and composites for bio and environmental
applications. Dr. Xu’s fundamental research is establishing a scientific
foundation for improved bitumen extraction.
Soares is the Canada Research Chair in Advanced Polymer Reaction
Engineering and Campus Alberta Innovation Program Chair in Interfacial Polymer
Engineering for Oil Sands Processing. His research interests include
water-soluble polymers for oil sands technology, characterization and
fractionation of polymer microstructures and in-situ polymer nanocomposites.
Polymers have the potential to impact many aspects of oil sands production—from
extraction to tailings management.
Liu serves as scientific director of the Institute for Oil Sands Innovation
and is the Ron Nolan/Hatch Professor of Sustainable Energy and Mineral Process
Technologies. As the head of IOSI, Dr.
Liu brings together top-flight researchers and industry leaders to realize a
vision of “oil sands operations that use little or no water, consume less
energy, generate lower greenhouse gas emissions and yield high-quality products
at lower costs.”