Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 180, Issue -, Pages 250-256Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2013.06.040
Keywords
Mesoporous silica; Thick coating; Electrophoretic deposition; Water vapor; Adsorption
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Funding
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
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Ordered mesoporous silica (MPS) is expected to provide an adsorbent for energy-efficient air-conditioning systems, such as desiccant cooling systems, humidity control systems, and adsorption heat pumps, which can contribute to the reduction of CO2 emissions because they offer the possibility of recovery at temperatures as low as 50 degrees C. For these applications, it is crucial to establish a method for fixing MPS on substrates with high thermal conductivity. We have already studied the technological feasibility of using the electrophoretic deposition (EPD) process to prepare a thick coating of MPS powder on a metal substrate. In this study, we investigated EPD with the addition of a small amount of binder and succeeded in increasing the mechanical strength and thermal stability of the thick MPS coating. The approximately 100 mu m-thick MPS coating showed excellent water vapor adsorption-desorption properties and sufficient stability for more than 250 adsorption-desorption cycles, without any reduction in the adsorption amount. The dehumidification amount per cycle was 0.23 g-H2O/g-MPS, which correspond to 6.9 g-H2O/g-MPS/h. (C) 2013 Elsevier Inc. All rights reserved.
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