Scientists from the University of Cambridge have
developed a system that uses microwaves to convert waste oil
into vehicle fuel
It has been estimated that over 8 billion US gallons (30.3
billion liters) of used motor oil are produced every year by the
world's cars and trucks. While some of that is re-refined into
new oil or burned in furnaces for heat, neither of those
processes are entirely environmentally-innocuous. In other
cases, it is simply discarded. Today, however, researchers from
the University of Cambridge announced the development of a
process that uses microwaves to convert waste oil into vehicle
fuel.
Scientists have already been using a process known as
pyrolysis for recycling oil. It involves heating the oil to
a high temperature in the absence of oxygen, and causes the oil
to break down into a mixture of gases, liquids, and solids.
While the gases and liquids can be converted to fuel,
the Cambridge
scientists state that traditional pyrolysis doesn't heat the oil
very evenly, making the fuel conversion process difficult and
impractical.
What they did, however, was to add a microwave-absorbent
material to samples of waste oil, before subjecting it to
pyrolysis by heating it with microwaves. The addition of the
material caused the oil to heat more evenly, allowing almost 90
percent of it to easily be converted into a mixture of
conventional gasoline and diesel.
Study leader Howard Chase, a professor of Biochemical
Engineering, believes that their unique brand of pyrolysis shows
great potential for being scaled up to the commercial level.
The research was presented today in Anaheim, California, at
the 241st National Meeting & Exposition of the American Chemical
Society.
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