Fabrication of granulated NaY zeolite nanoparticles using a new method and study the adsorption properties

Charkhi, A ; Sharif University of Technology | 2012

986 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.powtec.2012.06.041
  3. Publisher: 2012
  4. Abstract:
  5. NaY zeolite nanoparticles were synthesized and shaped into the uniform spherical granules using a developed novel and simple two-step granulation technique. First, the alginate/nanozeolite or alginate/nanozeolite-bentonite spherical hybrid was successfully fabricated, and then the alginate was decomposed by calcinations resulting uniform spherical granules. To improve the mechanical stability of the prepared granules, bentonite was added as an inorganic binder at different ratios of 20wt.% to 40wt.%. Moreover, the effect of binder on the ion exchange properties of the prepared granules was studied. Increasing of binder content from 20wt.% to 40wt.% linearly enhanced the mechanical stability of the granules by 229%. Nevertheless, the addition of binder decreased the N 2 adsorption capacity by 19.2% at 77K and reduced the maximum Sr 2+ uptake per gram of granules by 35%. It was revealed that the ion exchange and N 2 adsorption capacities of the granulated NaY nanozeolites were, respectively, 24% and 43% higher than the micronsized granulated zeolite with the same amount of the binder (i.e. 20wt.% of bentonite)
  6. Keywords:
  7. Faujasite ; Faujasites ; Nanozeolites ; NaY ; Shaping ; Sodium alginates ; Binders ; Mechanical stability ; Spheres ; Synthesis (chemical) ; Granulation ; Alginic acid ; Bentonite ; Nanoparticle ; Zeolite ; Adsorption ; Cation exchange ; Cell size ; Cell structure ; Chemical composition ; Controlled study ; Crystallization ; Infrared spectroscopy ; Ion exchange ; Nanofabrication ; Polymerization ; Scanning electron microscopy ; Thermal analysis ; X ray diffraction
  8. Source: Powder Technology ; Volume 231 , November , 2012 , Pages 1-6 ; 00325910 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0032591012004500