Biofuels can replace wood, coal, liquefied natural gas, are widely used for life heating furnace ... charcoal: (the market of straw charcoal)can replace firewood, raw coal, liquefied gas, widely used in family stove, warming stove, hot ... .4g/cm3 weight1300kg1500kg1800kg2000kg(Finished product calorific value):3500-5500 kilocalorie Briquette Machine for Straw Fuel