Preparation of zeolite A tubes from amorphous aluminosilicate extrudates

Oezcan A., Kalipcilar H.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, cilt.45, sa.14, ss.4977-4984, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 14
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1021/ie060011m
  • Dergi Adı: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4977-4984
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

A method is presented for the hydrothermal synthesis of binderless zeolite A bars and tubes with high purity from amorphous aluminosilicate extrudates. The solid that was separated from a hydrogel was mixed with an aqueous solution of hydroxyethyl cellulose to obtain a paste, which was extruded into bars and tubes. After calcination, amorphous bars and tubes were converted to zeolite A in the liquid phase that was separated from the hydrogel. The zeolite bars and tubes were composed of cubic zeolite A crystals and had only macropores with an average pore size of similar to 3 mu m besides the zeolite pores. Zeolite A bars exhibited moderate mechanical strength, with a crush strength of 0.4 MPa.