System for use of land fills and recyclable materials
OwnerJon P. Wikstrom, Dan Schiller +1inventors
InventorsJon P. Wikstrom, Dan Schiller, Jon R. Turner
Life of this patent
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Abstract
Gases are vented from a waste site such as a landfill, and the gases are separated into at least three streams comprising a hydrocarbon stream, a carbon dioxide stream, and residue stream. At least a portion of the carbon dioxide stream and hydrocarbon stream are liquefied or converted to a supercritical liquid. At least some of the carbon dioxide gas stream (as a liquid or supercritical fluid) is used in a cleaning step, preferably a polymer cleaning step, and more preferably a polymer cleaning step in a polymer recycling process, and most preferably in a polymer cleaning step in a polymer recycling system where the cleaning is performed on-site at the waste site.
Claims18
A process for use of gases collected from a solid/liquid material waste site comprising:
- collecting gases from the material waste site
- separating the collected gases into at least three streams comprising a hydrocarbon stream, a carbon dioxide stream, and residue stream,
- condensing at least a portion of the carbon dioxide stream or hydrocarbon stream to a liquid or supercritical liquid,
- using at least a portion of the hydrocarbon stream to generate energy, and
- using energy from the hydrocarbon stream to power two on-site commercial processes, one process comprising carbon dioxide liquefaction and the other commercial process selected from the group consisting of hydrogen production, carbon black production, cleaning with carbon dioxide as a cleaning material, molding polymeric materials, and pelletizing polymeric materials.
Dependencies are inferred from the claim text.