A method to create a natural charcoal briquette is described herein. A wood material is collected and impurities are removed from the wood material. The wood material is dried at a temperature in a range of approximately 150° C. to approximately 200° C. to reach a moisture level in a range of approximately 3.7% to approximately 5.0%. The dried wood material is compressed in a shaped mold at approximately 300° C. and under 40 tons of pressure to form a charcoal briquette. The charcoal briquette is carbonized at a temperature in a range of approximately 700° C. to approximately 800° C. in a range of approximately 14 days to approximately 17 days. The charcoal briquette is then cooled for approximately 2 days prior to use or packaging.

A method for producing an odor-free HTC coal, at least comprising the following steps: a) providing a biomass; b) performing a hydrothermal carbonization in order to produce a carbon sludge, the carbon sludge comprising HTC coal and HTC process water; c) separating HTC coal and HTC process water by a mechanical dewatering process; d) heating the HTC coal to a temperature of at least 150 degrees Celsius in order to remove highly volatile carbon compounds.

A method to create a natural charcoal briquette is described herein. A wood material is collected and impurities are removed from the wood material. The wood material is dried at a temperature in a range of approximately 150? C. to approximately 200? C. to reach a moisture level in a range of approximately 3.7% to approximately 5.0%. The dried wood material is compressed in a shaped mold at approximately 300? C. and under 40 tons of pressure to form a charcoal briquette. The charcoal briquette is carbonized at a temperature in a range of approximately 700? C. to approximately 800? C. in a range of approximately 14 days to approximately 17 days. The charcoal briquette is then cooled for approximately 2 days prior to use or packaging.

The invention provides fatty acid methyl ester fuel compositions and methods of making same.