Gördes Yöresi Klinoptilolitin (Doğal Ve Modifiye) Su Buharı Adsorpsiyonu

Year 2007, Volume: 20 Issue: 1, 33 - 46, 30.06.2007

Meryem Sakızcı , Ertuğrul Yörükoğulları

Abstract

 Bu çalışmada Gördes klinoptiloliti (klinoptilolitçe zengin doğal tüf örneği) (CLN) ve bundan itibaren hazırlanan katyonik formlar (Li-, Na-, K-, Mg-, Ca-, ZH1- ve ZH2-CLN örnekleri), üzerinde zamana bağlı olarak, 30 ° C, 50 ° C ile 80 ° C sıcaklıklarındaki su tutma kapasiteleri incelenmiştir. Katyonik formlar 1 N LiCl (Li-CLN), 1 N NaCl (NaCLN), 1 N KCl (K-CLN), 1 N MgCl2 (Mg-CLN), CaCl2 (Ca-CLN), 1 N HCl (ZH1-CLN) ve 1 N H2SO4 (ZH2-CLN) çözeltileri kullanılarak hazırlanmıştır. Doğal ve modifiye örnekler, XRD ve BET yöntemleri ile karakterize edilmiştir. BET yöntemi ile numunelerin özgül yüzey alanları ve adsorpsiyon izotermleri bulunarak adsorpsiyon özellikleri saptanmıştır.  Klinoptilolit numunelerinin modifiye edilmesiyle su kapasitelerinin arttığı ve bunun yüzey alanıyla ilişkili olduğu belirlenmiştir. Klinoptilolitin H+ formlarının (ZH1- ve ZH2-CLN) en yüksek su adsorpsiyonu kapasitesine sahip olduğu, kapasitenin sırasıyla Ca, Li, Mg ve Na formlarında azalma gösterdiği ve K+ formunun ise en az su adsorpsiyonu kapasitesine sahip olduğu belirlenmiştir

Keywords

Doğal Zeolit, Modifiye Zeolit, Klinoptilolit, Su Buharı Adsorpsiyonu, Kurutucular.

Water Vapour Adsorptıon Of Clınoptılolıte (Natural And Modıfıed) From Gördes Regıon

Abstract

In this study, The adsorption of water vapour capacities onto clinoptilolite (clinoptilolite-rich zeolitic tuff) obtained from Gördes region and its cationic forms (Li-, Na-, K-, Mg-, Ca-, ZH1- and ZH2-CLN samples) were investigated at the temperatures of 30°C, 50°C and 80°C. Cationic forms were prepared by using 1 N LiCl (Li-CLN), 1 N NaCl (Na-CLN), 1 N KCl (K-CLN), 1 N MgCl2 (Mg-CLN) , CaCl2 (CaCLN), 1 N HCl (ZH1-CLN) and 1 N H2SO4 (H2-CLN) solution. Natural and modified samples were characterised by XRD and BET methods. Sorption properties of samples were determined by using specific surface areas and adsorption isoterms obtained from BET method. An increase in water vapour capacity was determined when clinoptilolite samples were modified and it was also determined that this result was related with the surface area. Finally, it was found that, H+ forms of clinoptilolite (ZH1- ve ZH2-CLN) had the highest water vapour adsorption capacity while its K+ form had the lowest one. In addition, It was determined that the water adsorption capacity decreased Ca, Li, Mg and Na forms, respectively. With its mentioned properties, natural zeolites are a suitable choice for gas drying applications in today’s industry. 

Keywords

Natural zeolite, modified zeolite, clinoptilolite, water vapour adsorption, drying. .

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