Study on Modification of NaX Zeolites: The Cobalt (II)-Exchange Kinetics and Surface Property Changes under Thermal Treatment

Figure 4

X-ray powder diffraction patterns of NaX and 0.1-NaCoX thermally treated zeolites: thermally untreated sample NaCoX-0 and the samples treated at 400°C for 3 h (0.1-NaCoX-1), 500°C for 3 h (0.1-NaCoX-2), 600°C for 3 h (0.1-NaCoX-3), and 700°C for 3 h (0.1-NaCoX-4).