I-Corps: Siloxane control in landfill gas using waste tire rubber particles

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The broader impact/commercial potential of this I-Corps project is to create a new re-use option for waste tires and, at the same time, provide an economical solution to remove siloxanes in landfill gas prior to combustion for electricity generation. This novel technology for the treatment of landfill gas/biogas to remove siloxanes uses the smallest size fraction of waste tire rubber particles as the adsorption media. The innovation of this technology will make electricity generation from landfill gas more sustainable and more attractive economically. In addition, the development of a new reuse market for waste tires will reduce the burden of tire disposal across the U.S. By providing an economical solution for siloxane control as well as creating a reuse option for waste tires, the well-being of communities near landfills will potentially be improved.This I-Corps project will help to propel electricity generation from landfill gas by removing one of the major obstacles to its use. A major challenge to the use of landfill gas as a renewable energy source comes from trace contaminants, namely 'silica containing compounds' called siloxanes which are converted to silicon dioxide, a glass like substance that reduces engine efficiency, reduces heat transfer, increases scour and abrasion, and accelerates equipment deterioration. This innovation is the development of a new siloxane adsorption process using waste tire rubber particles. Using this approach, the siloxane nuisance in landfill gas to electricity plants will be mitigated. Currently, there are limited options for the reuse of the rubber material from waste tires. The development of an effective adsorption process using the smallest size fraction of waste tire rubber particles represents an exciting entrepreneurial opportunity to turn this waste product into a marketable adsorbent that can compete with activated carbon adsorption for siloxane control.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.