2005 Volume 31 Issue 4 Pages 273-277
CHA-type structure silicoaluminophosphate zeolite (SAPO-34) was examined as an AHP adsorbent and the influence of silicon content on its adsorption performance was evaluated. SAPO-34 with silicon content of 7.5 mol% (Functional Adsorbent Material-Zeolite 02; FAM-Z02) was selected for further testing. The water vapor adsorption isotherm of FAM-Z02 was S-shaped and highly dependent on temperature, and a small hysteresis was observed with adsorption/desorption at 363K. No changes were observed in the properties of FAM-Z02 after 100000 cycles of water vapor adsorption-desorption, indicating that FAM-Z02 is suitable durable for practical use. When the AHP was operated under conditions of TL/TM/TH=283 K/313 K/363 K, the adsorption capacity of FAM-Z02 was 4.8 times and 3.8 times those of Y zeolite and silica gel.