... it can be used as fuel with high energy.What is straw charcoal?A green fuel with high energy, which ... raw material is straw, stalk, bark, industry waste, ect, crushed & ... 1/30 of the raw stalk2. High density, it is 10-15 times to raw stalk in weight, density: ... and transport. 5. Burning hour is long.6. Non-toxic, sulphur content is lower than 0.5%7. Burning ...