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

K. C. Chan, Christopher Y. H. Chao, G. N. Sze-To, K. S. Hui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationASME 2011 5th International Conference on Energy Sustainability
PublisherASME
Pages23-28
Number of pages6
ISBN (Print)9780791854686
DOIs
Publication statusPublished - 2011
EventASME 2011 5th International Conference on Energy Sustainability, ES 2011 - Washington, DC, United States
Duration: 7 Aug 201110 Aug 2011

Conference

ConferenceASME 2011 5th International Conference on Energy Sustainability, ES 2011
CountryUnited States
CityWashington, DC
Period7/08/1110/08/11

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