Characterization and ethylene adsorption of natural and modified clinoptilolites

ERDOĞAN ALVER B., SAKIZCI M., YÖRÜKOĞULLARI E.

APPLIED SURFACE SCIENCE, cilt.254, sa.8, ss.2450-2457, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 254 Sayı: 8
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.apsusc.2007.09.058
  • Dergi Adı: APPLIED SURFACE SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2450-2457
  • Anahtar Kelimeler: zeolites, adsorption, ethylene, thermal properties, XRD, CARBON-DIOXIDE, ETHANE, EQUILIBRIUM, METHANE, BINARY, PROPYLENE, ZEOLITES, MIXTURES, PROPANE
  • Anadolu Üniversitesi Adresli: Evet

Özet

The ethylene adsorption of Turkey clinoptilolite-rich tuff from Gordes and Bigadic region of western of Anatolia and their exchanged forms (K+, Na+ and Ca2+) were investigated. The clinoptilolite samples were characterized using XRD, TG-DTA and nitrogen adsorption methods. Adsorption isotherms for ethylene on natural and modified forms of both adsorbents at 277 K and 293 K were obtained at pressures up to 38 kPa. Uptake of ethylene increased as Na-CLN < Ca-CLN < K-CLN < Natural CLN for Gordes zeolite at 277 K, 293 K and for Bigadic zeolite at 277 K. For Bigadic zeolites at 293 K, uptake of ethylene increased in the order Ca-CLN < Na- CLN < K- CLN < Natural CLN. It was found that ethylene adsorption capacity of Bigadic clinoptilolite samples was much greater than Gordes clinoptilolite samples except K+ modified forms at both temperatures. These results show that both natural clinoptilolites have a considerable potential for the removal of ethylene. (c) 2007 Elsevier B. V. All rights reserved.