کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5134685 | 1492951 | 2017 | 8 صفحه PDF | دانلود رایگان |
- Waste bamboo chopsticks (WBC) were upgraded as a good-quality bio-fuel by torrefaction.
- Temperature and time both significantly affect the production of torrefied WBC (WBCT).
- The metals contents of WBCT satisfy with the regulations of Initiative Wood Pellets Buyers (IWPB).
- Wet-basis high heating value of WBCT of 21.72Â MJÂ kgâ1 meets coal standard of Taiwan Power Co. (TPC) and IWPB.
- Sulfur content of WBCT is lower than the ceiling set by TPC and IWPB.
In this study, waste bamboo chopsticks (WBC) were upgraded as solid bio-fuel by torrefaction using a tubular furnace with nitrogen as carrier gas. In order to fulfill the quality specifications of coal and industrial wood pellets, the effects of temperature and time of torrefaction on proximate and ultimate compositions and its dry-basis heating value (HHD) were studied and elucidated. The results showed that the mass yield of WBC is 69% at 563Â K and 40Â min, while HHD of WBC is increased from 19.31 to 23.04Â MJÂ kgâ1 with an energy densification factor of 1.19, which satisfy the specification of quality D of Taiwan Power Co. and I3 industrial quality of Initiative Wood Pellets Buyers. Further, the torrefied WBC (WBCT) pellets become convenient to store, transport and processing and hard to be rotten because of the modification of surface hydrophobicity. The ash content of WBCT is only 2.19Â wt.% in wet basis, which is beneficial in practical boiler. Further, the energies needed for drying, heating and torrefaction is 2.31Â MJ for processing 1Â kg WBC with CO2 emission of 0.339Â kg. Therefore, WBCT would be practical alternative as solid bio-fuel for cofiring with coal.
Journal: Journal of Analytical and Applied Pyrolysis - Volume 126, July 2017, Pages 315-322