from the Institute of Physics:
Waste coffee used as fuel storage
2 September 2015
Scientists have developed a simple process to treat waste coffee grounds to allow them to store methane. The simple soak and heating process develops a carbon capture material with the additional environmental benefits of recycling a waste product.
Methane capture and storage provides a double environmental return – it removes a harmful greenhouse gas from the atmosphere that can then be used as a fuel that is cleaner than other fossil fuels.