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Experimental evaluation demonstrates efficient biochar yield and reduced emissions during rubberwood scrap pyrolysis, suggesting scalable and low-carbon biomass processing.
The study examines the impact of kiln capacity on environmentally friendly biochar yield and characteristics from rubberwood scrap using an MCGB as the heat source. A 600-liter finned-wall kiln was tested at 50%, 75%, and 100% capacity. The MCGB maintained 550°C for pyrolysis, with an equivalence ratio of 0.3–0.6 (gasification) and 0.7–0.9 (combustion), a peak temperature of 1,204°C. The biochar yield was 26–27%, while wood vinegar yield ranged from 38.1–42.5%. The kiln reduced pyrolysis time by 55% compared to conventional klin, with GHG emissions of 0.16-0.21 kg CO 2 e/kg-biochar. The biochar met cooking and deodorization standards, highlighting the MCGB’s efficiency and sustainability.
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Unsomsri et al. (2025) studied this question.
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