Briquetting is a process that biomass is compressed under high pressure and high temperature.

The self bonding of biomass forms a briquette which involves the thermo-plastic flow of the biomass. The lignin content that occurs naturally in biomass is liberated under high pressure and temperature. Lignin serves as the glue in the briquetting process, thus binding,compressing the biomss to form into high density briquettes.

During this process, no binder needs to be used. So the ouput briquette is a type of clean and green fuel that is ideal for using in furnaces, boilers and the open fires. The density of the briquettes is 1100~1300kg/m.

http://www.ascof.com/Biomass-Briquette-Machine/Biomass-Briquetting-Press.html