biomass based-activated charcoal for adsorption
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RESEARCH POSTER PRESENTATION DESIGN © 2019
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1 Department of Energy and Environmental Engineering, IGSES, Kyushu University, Japan2 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
Chairunnisa1,2*, K. Thu1,2, T. Miyazaki1,2, F. Miksik1,2, J. Miyawaki3
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Kyushu University Asia Week 2021
Problems caused by humidity
Source: Building Performance Institute, Inc.
Tropical countriesSub-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 Dehumidification2
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 charcoalSource: 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
Desiccant3
4 Activated Charcoals for Dehumidification
Activated Charcoals
(AC)
InputAmbient Air:
Indonesia(Humidity ratio:
0.17 – 0.21 kg/kg)Adsorption Isotherm
Processed Air
Air
heate
r
Return Air:26oC, 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 SumateraSS = South SumateraWJ = West JavaBa = BaliEK = East Kalimantan
NS = North SulawesiMa = MalukuPa = 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/