Adsorption properties of a natural zeolite-water pair for use in adsorption cooling cycles

Solmus, Ismail
Yamali, Cemil
Baker, Derek Keıth
Caglar, Ahmet
The equilibrium adsorption capacity of water on a natural zeolite has been experimentally determined at different zeolite temperatures and water vapor pressures for use in an adsorption cooling system. The Dubinin-Astakhov adsorption equilibrium model is fitted to experimental data with an acceptable error limit. Separate correlations are obtained for adsorption and desorption processes as well as a single correlation to model both processes. The isosteric heat of adsorption of water on zeolite has been calculated using the Clausius-Clapeyron equation as a function of adsorption capacity. The cyclic adsorption capacity swing for different condenser, evaporator and adsorbent temperatures is compared with that for the following adsorbent-refrigerant pairs: activated carbon-methanol; silica gel-water; and, zeolite 13X-water. Experimental results show that the maximum adsorption capacity of natural zeolite is nearly 0.12 kg(w)/kg(ad) for zeolite temperatures and water vapor pressures in the range 40-150 degrees C and 0.87-738 kPa.


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Citation Formats
I. Solmus, C. Yamali, B. KAFTANOĞLU, D. K. Baker, and A. Caglar, “Adsorption properties of a natural zeolite-water pair for use in adsorption cooling cycles,” APPLIED ENERGY, pp. 2062–2067, 2010, Accessed: 00, 2020. [Online]. Available: