Silver Nitrate Impregnated Pellet-Type Adsorbents for Propylene/Propane Separation

Adsorptive separation of propylene from propane using adsorption has attracted much attention due to its energy efficiency compared to distillation. We prepared propylene-selective adsorbents suitable for pressure swing adsorption (PSA) separation by impregnating AgNO3 on high-surface-area pellets s...

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Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 45; no. 26; pp. 9129 - 9135
Main Authors Ko, Chang Hyun, Han, Sang-Sup, Park, Jong-Ho, Cho, Soon-Haeng, Kim, Jong-Nam
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 20.12.2006
Subjects
Applied sciences
Chemical engineering
Exact sciences and technology
Pellet
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Summary:Adsorptive separation of propylene from propane using adsorption has attracted much attention due to its energy efficiency compared to distillation. We prepared propylene-selective adsorbents suitable for pressure swing adsorption (PSA) separation by impregnating AgNO3 on high-surface-area pellets such as silica, clay, and aluminosilica as substrates. Considering adsorption capacity, selectivity, desorption rate, and pellet crush strength before and after impregnation, AgNO3/aluminosilica was the most suitable adsorbent among the three adsorbents. A large portion of the AgNO3 was located inside micropores in the aluminosilica after impregnation. The propylene adsorption capacity of AgNO3/aluminosilica was 2.3 mmol/g, and the selectivity of propylene over propane was 3.1 at 298 K and 3 kgf/cm2. However, the adsorption capacity of AgNO3/aluminosilica for propylene decreased by exposing the adsorbent to hydrogen.
Bibliography:istex:47D2A209732C1A2AC3B16373942E9CF3275F9FEA
ark:/67375/TPS-9SW1CV0X-V
ISSN:0888-5885
1520-5045
DOI:10.1021/ie051119p