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Chemically Treated Rice Husk Blends as Green Desiccant Materials for Industrial Application
Author(s) -
Emdadi Zeynab,
Asim Nilofar,
Ambar Yarmo Mohd,
Ebadi Mehdi,
Mohammad Masita,
Sopian Kamaruzzaman
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201600105
Subject(s) - husk , desiccant , materials science , moisture , silica gel , porosity , absorption of water , absorbance , composite material , chemical engineering , chemistry , chromatography , botany , biology , engineering
The use of rice husks (RHs), treated RHs, and blends thereof as desiccants was studied. Bare RHs, treated RHs, and blends were characterized, and their water absorbances compared. Acid‐treated RHs showed better moisture absorbance than alkali‐treated RHs and hence were used to prepare blends. Moisture absorption of RH materials and silica gel were compared. Blends with a higher content of acid‐treated RHs showed higher water and moisture absorbency. The moisture absorbency of the blends was enhanced, and they exceeded the silica‐gel limit at 48 h of exposure time. The higher absorbency in blends with higher contents of acid‐treated RHs is likely due to higher porosity and improved adhesion properties owing to surface OH groups. Moreover, RH blends require shorter regeneration times than silica gel.