Production of Charcoals from Cultural Waste of Mushroom and Soybean Hull
Abstract
In order to utilize cultural waste of mushroom and soybean hull as coke, conversion from dry cultural waste of mushroom (DCWM) and soybean hull (SH) into charcoal by carbonization at 400-800°C, and conversion from them into formed charcoal were investigated.
The thermogravimetry tendency of DCWM was intermediate between xylan and lignin, and that of SH was intermediate between cellulose and xylan. Carbonization of DCWM and SH led to make charcoal with high carbon content and higher heating value than raw material. Regarding charcoal carbonized at 800°C, carbon contents of DCWM and SH were 56 and 72%, higher heating values of them were 20.59 and 25.52 MJ/kg, respectively. It was affected by high ash content of DCWM and SH, that carbon contents and higher heating values of these charcoals were lower than coke. On utilization charcoal of DCWM and SH as coke, a preventative method must be taken regarding lower heating value of these than coke. By hot-press forming at 160°C 98MPa from charcoal carbonized at 250°C of DCWM or SH, these charcoal pellets could be produced. And by carbonization at 300-800°C of the pellet formed at 70°C 98MPa from DCWM, carbonized pellet could be produced. In the same manner for producing carbonized pellet of DCWM, the carbonized pellet of SH could be produced, but maximum temperature of carbonization was about 400°C, from the phenomena that puff occur on the pellet in the process of carbonization of it at 500°C. From these results, it is considered effective for increasing energy density of biomass, to convert from raw material into charcoal or formed charcoal.- Publication:
-
Journal of High Temperature Society
- Pub Date:
- 2012
- Bibcode:
- 2012JHTS...37...50I