Bras, B. and Guldberg, T., "Environmental Implications of Recycling Scrap Tire Material into Ultra Fine Rubber Powder," SAE Technical Paper 2012-01-1051, 2012, doi:10.4271/2012-01-1051.
In this paper, we quantify several environmental benefits associated with using ultra fine scrap tire rubber powders in virgin and recycled rubber and plastics compounds. Specifically, we will analyze the savings in oil extraction and rubber production in comparison to the rubber powder production using cryogenic grinding. The analysis uses first hand factory data provided by a rubber powder producer. As will be shown, even though cryogenic nitrogen requires production and use of liquid nitrogen, there is still a net environmental benefit in terms of energy use and greenhouse gas emissions.