... is 10-15 times to raw stalk in weight, density: 0.8-1.4g/cm3. Durable to use, calorie can ... reach 3500-55004. Convenient to store ... and transport. 5. Burning hour is long.6. Non-toxic, sulphur content is lower than 0 ... firewood, raw coal, liquefied gas, widely used in family stove, warming stove, hot-water boiler, industrial ...