Preparation and characterization

of Moroccan clay support for zeolitic membranes

 

E. Mateo1, M. Menéndez1, J. Coronas1, N. Tijani2, H. Ahlafi2*,

L. Messaoudi2, A. El Gamouz2, M. Ouammou3

1 Department of Chemical and Environmental Engineering, University of Zaragoza, 50018 Zaragoza. Spain

2 Département de Chimie, Faculté des Sciences , Meknès, Morocco

3 Département de Chimie, Faculté des Sciences et Techniques, Mohammadia, Morocco

* Corresponding author. E-mail: hahlafi@yahoo.fr

Received: 26 June 2008; revised version accepted: 26 September 2008

 

Abstract

     A common powder clay available in center region of Morocco (Meknes) was characterized by some techniques (FTIR, XRD, DTA and by X fluorescence methods) and used as a cheaper support to prepar silicalite membrane in the form of flat disk. This clay is composed principally by quartz as amorphous silica, alumina and calcium oxides (about 70%). Two kinds of membrane supports with organic additives CC (5%) and CA (20%) (Carbon or Starch additives) were obtained between T = 700 °C and T = 950°C, with an appropriate pore diameters (d = 0,2 µm) for membrane synthesises. Without the use of additives, the pore diameter of the support was smaller (d = 0,1 µm). The SEM study shows a uniform layer of silicalite crystals on top of the CA support. The preliminary N2 permeation test indicate the membranes prepared could have application in gas or liquid separation.   

 


Keywords : Membranes; Zeoite; Clay; Organic additives.

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