Dependence between the activity and selectivity of NaLaY and NaCeY catalysts in the catalytic disproportionation of toluene

Adsorption of Zn2+ ions onto NaA and NaX zeolites: Kinetic, equilibrium and thermodynamic studies

“…The general composition of zeolites can be represented by M y/z [(SiO 2 ) x (AlO 2 ) y ]nH 2 O where M is the exchangeable ion metal with a valency z. Zeolites are a suitable choice as they have a large cation exchange capacity and an affinity for heavy metals [4][5][6][7][8][9]. They are widely used as sorbents [10][11][12][13][14], catalysts [15][16][17][18] and cation exchangers [19][20][21][22][23]. The NaX zeolite cations are located in the sodalite super cage and double hexagonal rings of the zeolite Taking into consideration these approaches, we focus our attention to the use of models based on Fick's laws in the analysis of experimentally obtained data, and to determine the step describing the mechanism of the reaction according to Eq.…”

Utilisation de matériaux à base d’argiles modifiées dans la conversion du toluène

“…Selon la litté rature [8,16,[18][19][20], la ré action de dismutation du toluè ne peut avoir lieu selon deux mé canismes possibles montré s par la Fig. 3.…”

Modelling and adsorption studies of removal uranium (VI) ions on synthesised zeolite NaY

“…The zeolite Y is of utmost importance in heterogeneous catalysis; for example, it is the active component in catalysts for fluid catalytic cracking [10][11]. Its porous system is relatively complicated and consists of spherical cages, referred to as supercages, with a diameter of 13 Å connected tetrahedrally with four neighbouring cages through windows with a diameter of 8 Å [12].…”