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US 2021/0214629 A1Published application
Processing of low rank coal
AssigneeEcogensus LLC
InventorBjornulf Ostvik
Life of this patent
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Abstract
A method of preparing a fuel composition includes placing coal having a heat content between about 3,000 BTU/lb and about 9,000 BTU/lb and a moisture content between about 20 wt % and about 60 wt % in a vessel. The coal is exposed to heat and a pressure less than atmospheric pressure within the vessel, thereby reducing the coal, such that an average primary particle size of the coal is less than 1 millimeter. A binder is introduced to the vessel, such that the coal combines with the binder to yield a mixture. The mixture is shaped to yield a fuel composition.
Claims19
A method of preparing a fuel composition, the method comprising:
- placing coal having a heat content between about 3,000 BTU/lb and about 9,000 BTU/lb and a moisture content in a range between about 20 wt % and about 60 wt % in a vessel;
- exposing the coal to heat and a pressure less than atmospheric pressure within the vessel, thereby reducing the coal, such that an average primary particle size of the coal is less than 1 millimeter;
- introducing a binder to the vessel, such that the coal combines with the binder to yield a mixture;
- and
- shaping the mixture to yield a fuel composition.
2 more elements
Dependencies are inferred from the claim text.