About Bio Coal Briquettes
Biomass briquettes mostly made of green waste and other organic materials are commonly used for electricity generation heat and cooking fuel These compressed compounds contain various organic materials including rice husk bagasse ground nut shells municipal solid waste agricultural waste The composition of the briquettes varies by area due to the availability of raw materials The raw materials are gathered and compressed into briquette in order to burn longer and make transportation of the goods easier1 These briquettes are very different from charcoal because they do not have large concentrations of carbonaceous substances and added materials Compared to fossil fuels the briquettes produce low net total greenhouse gas emissions because the materials used are already a part of the carbon cycle2
One of the most common variables of the biomass briquette production process is the way the biomass is dried out Manufacturers can use torrefaction carbonization or varying degrees of pyrolysis Researchers concluded that torrefaction and carbonization are the most efficient forms of drying out biomass but the use of the briquette determines which method should be used3
Compaction is another factor affecting production Some materials burn more efficiently if compacted at low pressures such as corn stover grind Other materials such as wheat and barleystraw require high amounts of pressure to produce heat4 There are also different press technologies that can be used A piston press is used to create solid briquettes for a wide array of purposes Screw extrusion is used to compact biomass into loose homogeneous briquettes that are substituted for coal in cofiring This technology creates a toroidal or doughnutlike briquette The hole in the center of the briquette allows for a larger surface area creating a higher combustion rate