The Effect of Dolomite Addictive Ratio on Torrified Cassava Rhizome in the Biomass Combustion Process

Abstract:

This research studies on the effect of additive (Dolomite) on Biomass powder (Cassava rhizome) which passes Torrefied process and fixed bed at 250 degrees Celsius for one hour and a half. The gasifier with up-draft type was used in this experiment. Air pressure was fixed at 0.1 Bar. The useful heat (Q_useful) and Low heating valves (LHV) was investigated by using an Automatic Bomb Calorimeter. Moreover, the dolomite was varied 0, 10 and 15% by weight mixed with Cassava rhizome achieved with Torrefied process. When Low heating valves (LHV) slightly decreases from 21.96±0.22 MJ/kg to 18.15±0.50 MJ/kg, Q_useful heat from the burning from gasifier sharply increase when it is mixed with dolomite from 753.34±39.18 to 1,003.97±33.49KJ respectively. The loading of dolomite has significance affecting the useful heat. The present study reveals that low heating valves (LHV) decreases and Q_useful heat increase result from dolomite which gives a clean gas product and the Tar molecule can be easily broken. The CO₂ gas from the combustion process was absorbed by CaO, which is the main component in dolomite. The cost of mixing 8.9% of Dolomite with Cassava rhizome is the optimum ratio for the biomass combustion process.

• Periodical: Defect and Diffusion Forum (Volume 407)
• Pages: 113-120
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.407.113
• Online since: March 2021
• Authors: Nat Thuchayapong, Nattawut Tharawadee*
• Keywords: Additive, Biomass, Dolomite, Optimum Ratio, Useful Heat

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