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Tyres Recycled into a Cleaner Diesel Blend

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Old tyres can be completely recycled into lower-emission diesel engine oil instead of being dumped in highly flammable stockpiles that become breeding grounds for malaria and dengue-carrying mosquitoes.

“Globally, 1.5 billion tonnes of tyres are discarded each year,” said Prof Richard Brown of Queensland University of Technology. “Australia alone will generate 55 million disused tyres a year by 2020.

“Getting rid of old tyres in an environmentally friendly way is a universal nightmare. Stockpiles of used tyres around the world are a health hazard, as demonstrated by the recent Broadmeadows fire in Victoria, which was difficult to put out and generated huge amounts of toxic smoke.”

Brown’s team has tested the oil extracted from old tyres in a process developed by Australian company Green Distillation Technologies (GDT). When the oil was blended with diesel it produced a fuel with reduced emissions and no loss of engine performance.

“We tested the oil which GDT produces from both recycled natural and synthetic rubber tyres in 10% and 20% diesel blends,” explained PhD student Farhad Hossain. “We found a 30% reduction in nitrogen oxide, which contributes to photochemical smog, and lower particle mass, which means fewer problems for emissions-treatment systems.”

GDT’s chief operating officer, Trevor Bayley, said the oil could also be used as a...

The full text of this article can be purchased from Informit.