Nanyang Technological University researchers develop pyrolysis system to turn plastic waste into hydrogen fuel, carbon nanotubes; method can convert difficult-to-recycle litter such as contaminated food packaging, styrofoam, plastic bags

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SINGAPORE , April 18, 2022 (press release) –

Scientists from Nanyang Technological University, Singapore (NTU Singapore) have developed a new method for plastic waste to be converted into hydrogen based on pyrolysis, a high temperature chemical process.

Unlike PET plastic bottles which can be recycled easily, plastic litter containing contaminated food packaging, styrofoam and plastic bags, is challenging to recycle and is currently incinerated or buried in landfills, leading to both water and ground pollution.

Using the new method, NTU scientists can now convert plastic litter into two main products, hydrogen and a form of solid carbon known as carbon nanotubes – a high value material used in biomedical and industrial applications. Hydrogen is useful for generating electricity and powering fuel cells like those found in electric vehicles, with clean water as its only by-product.

Developing such hydrogen technologies is part of Singapore’s plan to explore hydrogen technologies in its push to diversify energy sources, as it could replace fossil fuels such as natural gas, while lowering the carbon footprint of the nation.

This waste-to-hydrogen research project used marine litter collected from local waters in collaboration with the Ocean Purpose Project, a non-governmental organisation and social enterprise. Together with industrial partner Bluefield Renewable Energy, the joint project demonstrates the potential for all non-recyclable plastics to be upcycled into fuels and high value materials.

Scaling up this technology to the industrial scale will be a big step forward for Singapore, opening up an alternative clean energy source while it carries out its inaugural Zero Waste Masterplan. The nation is currently seeking to reduce the waste being disposed at Semakau Landfill by 30 per cent by 2030, which will help to extend the landfill’s lifespan beyond 2035. 

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