Activation of Natural Zeolite as Water Adsorbent for Mixed-Adsorption Drying

Djaeni, M and Kurniasari, L and Purbasari, A and Sasongko, SB (2010) Activation of Natural Zeolite as Water Adsorbent for Mixed-Adsorption Drying. Proceeding of ICME, Gadjah Mada University .

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Abstract

Mixed-adsorption drying with material using zeolite is an option to improve product quality and energy efficiency of drying seeds. In this case, zeolite and seeds are mixed and fluidized by warm air as drying medium. The air will desorb water from seed, and at the same time, zeolite will adsorb vapor from air. Thus, the driving force of drying can be kept high. However, in Indonesia, the zeolite with high adsorption capacity is hardly found in market. This research studied the activation of natural zeolite using two different methods: by heating at 200-400oC, and adding NaOH 0.5-2.0 N. Results showed that the adsorbing capacity of zeolite activated by 1.0 N NaOH is 0.170 gr water/gr dry zeolite. While, by heating at 300oC for 3 hours, is 0.140 gr water loaded/gr dry zeolite. With the performance, zeolite can be used for drying application. Keywords: zeolite, fluidized, adsorption, drying, activation

Item Type:Article
Subjects:T Technology > TP Chemical technology
Divisions:Faculty of Engineering > Department of Chemical Engineering
Faculty of Engineering > Department of Chemical Engineering
ID Code:36363
Deposited By:Dr. Moh. Djaeni
Deposited On:12 Oct 2012 14:55
Last Modified:12 Oct 2012 14:55

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