Preparation of zeolite A tubes from amorphous aluminosilicate extrudates

Oezcan A., Kalipcilar H.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol.45, no.14, pp.4977-4984, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 45 Issue: 14
  • Publication Date: 2006
  • Doi Number: 10.1021/ie060011m
  • Journal Name: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4977-4984
  • Middle East Technical University Affiliated: Yes

Abstract

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.