Table 1: Chemical composition analysis and physicochemical properties of Zn-Mg-Al hydrotalcites.

CatalystsTheoretical ratio  
Zn/Mg/Al
Experimental ratioa  
Zn/Mg/Al
Unit cell parameters (Å)BET surface area (m2/g)b

HT-12 : 2 : 11.96/1.89/13.042 22.73 7.31166.4
HT-22 : 3 : 11.93/1.98/13.05822.897.57188.6
HT-33 : 3 : 13.02/2.98/13.06322.957.72220.8
HT-43 : 4 : 12.85/4.08/13.08823.597.94208.4

aExperimental Mg-Zn-Al atomic ratios in the synthesized catalyst determined by EPMA.
bBET surface area calcined at 500°C/8 h.