Development of New Zeolite 13X/CACL2 composite adsorbent for air-conditioning application

Chan, K. C., Chao, Christopher Y. H., Sze-To, G. N. and Hui, K. S. ORCID: (2011) Development of New Zeolite 13X/CACL2 composite adsorbent for air-conditioning application. In: ASME 2011 5th International Conference on Energy Sustainability. ASME, USA, pp. 23-28. ISBN 9780791854686

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Composite adsorbents synthesized from zeolite 13X and CaCl2 were investigated for applications in solar adsorption systems. The effect of Ca-ion-exchange on the adsorption properties of zeolite 13X was studied. Sodium ions in the zeolite structure were replaced by calcium ions by ion exchange. It was found that the Ca-ion-exchange process decreased the specific surface areas of the Ca-ion-exchanged zeolites while the total pore volumes were increased. The optimized Ca-ion-exchange condition existed when soaking zeolite 13X in 46wt% CaCl2 solution for 36 hours. The increase in the total pore volume is good for further impregnating the zeolite with CaCl2. A large difference in equilibrium water uptake, 0.404g/g, between 25°C and 100°C under 870Pa was recorded for the 13X/CaCl2 composite adsorbent impregnated in 40wt% CaCl2 solution. This was 295% of that of zeolite 13X under the same condition. The 13X/CaCl2 composite adsorbent showed a high potential in replacing vapor compression chillers in producing chilled water for central air-conditioning systems.

Item Type: Book Section
Faculty \ School: Faculty of Science > School of Mathematics
UEA Research Groups: Faculty of Science > Research Groups > Energy Materials Laboratory
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Depositing User: Pure Connector
Date Deposited: 04 Oct 2016 12:03
Last Modified: 21 Oct 2022 23:55
DOI: 10.1115/ES2011-54052

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