0023-6152

AA00697606

4797828

To develop “Biomass Charcoal Briquette (BCB)”, the forestry bio–fibers: wood/bamboo processing residues carbonized by pyrolysis were mixed with the pulping derivative, lignosulfonate (LS). The BCB was mixed with biomass charcoals (BC) and LS in predetermined density (PD) and mixing percent weight (wt %) with BC and LS. These were fabricated into BCB by cold/hot–pressing. The heating value of the BCB was evaluated for the potential of efficient conversion into biofuel, and the combustion emitted functional groups were analyzed by using TGA–IR to learn the characteristics of subsequent emissions. The BC yield decreased as the carbonization temperature and holding duration increased. The heating value and power consumption increased with carbonization temperature and holding duration. The H/C and O/C atomic ratios of charcoal approached to those of anthracite and lignite, respectively. The forestry bio–fibers with higher BC yield and heating value (1.6–1.7 times higher) was employed as the original materials for the development of BCB. The rebound degree (%) of BCB thickness developed by hot–pressing was lowered to 2.0–5.0%. The heating values of BCB by the extreme value theory, Dulong formula, and actual sampling point–selected were 22.22–23.57, 26.18–26.53, and 22.51–23.10 MJ/kg respectively. At the same PD, the BCB with a higher mixing percent weight with BC proportion had a higher heating value; for the same mixing percent weight, a higher PD represented a higher heating value. The energy yield of BC at the carbonization temperature of 300°C was 65.94% and the energy density was 1.65. According to TGA–IR, the functional groups emitted from the combustion of forestry bio–fiber, BC and LS in the air and nitrogen were subject to CO_2 peak.