RESEARCH POSTER PRESENTATION DESIGN © 2019 www.PosterPresentations.com Desiccant Wheel (made by AC) 1 Department of Energy and Environmental Engineering, IGSES, Kyushu University, Japan 2 International Institute for Carbon-Neutral Energy Research, Kyushu University, Japan 3 Advanced Device Materials, Institute for Material Chemistry and Engineering, Kyushu University, Japan *E-mail: [email protected] Biomass Based-Activated Charcoal for Adsorption Dehumidification in Humid Region Chairunnisa 1,2* , K. Thu 1,2 , T. Miyazaki 1,2 , F. Miksik 1,2 , J. Miyawaki 3 START HERE! Kyushu University Asia Week 2021 Problems caused by humidity Source: Building Performance Institute, Inc. Tropical countries Sub-tropical coutries (in summer) % Relative humidity: 70 – 100% (humidity ratio of 0.17 – 0.21 kg/kg % Relative humidity: 80 – 100% (humidity ratio of 0.024 – 0.27 kg/kg Why dehumidification or drying technology is highly needed in Asia? Air dehumidification in tropical countries consumed >15% of total energy for building. Needed technology with lower energy consumption! 1 Thermal Adsorption Dehumidification 2 Separate the humidity removal and temperature control. Provide 30 – 50% of energy saving. Thermal adsorption dehumidification Desiccant material with low regeneration temperature is needed. Activated charcoal Source: goodhousekeeping.com Can purify the air Can be regenerated using lower temperature Can be produced from low-cost precursor → waste biomass Has thermal stability and non-toxicity Desiccant 3 4 Activated Charcoals for Dehumidification Activated Charcoals (AC) Input Ambient Air: Indonesia (Humidity ratio: 0.17 – 0.21 kg/kg) Adsorption Isotherm Processed Air Air heater Return Air: 26 o C, humidity: 60% Exhausted Air Moisture Adsorption Measurement Walnut shell (WS) Acorn nutshell (AS) WS-AC & AS-AC Activated Carbon Production Dehumidification Simulation Dehumidification Capacity NS = North Sumatera SS = South Sumatera WJ = West Java Ba = Bali EK = East Kalimantan NS = North Sulawesi Ma = Maluku Pa = Papua • Dehumidification capacity (w) of ACs > silica gel. • ACs can be promising alternative desiccants for dehumidification in humid regions. • ACs can be regenerated using waste heat energy Conclusions Different tendency in different region & regeneration temperatures (Treg)! Source: Daikin & https://allabout-japan.com/