Figure 2
From: Role of Al in Na-ZSM-5 zeolite structure on catalyst stability in butene cracking reaction
1H, 27Al, and 29Si MAS NMR of Na-ZSM-5 catalysts with different SiO2/Al2O3 molar ratios (a–c) 1H MAS NMR of fresh Na-ZSM-5 catalysts with the SiO2/Al2O3 molar ratios = 20, 35, and 50, respectively, (d–f) 27Al MAS NMR of fresh Na-ZSM-5 catalysts with the SiO2/Al2O3 molar ratios = 20, 35, and 50, respectively, (g–i) 27Al MAS NMR of spent Na-ZSM-5 catalysts with the SiO2/Al2O3 molar ratios = 20, 35, and 50, respectively, j–l29Si MAS NMR of fresh Na-ZSM-5 catalysts with the SiO2/Al2O3 molar ratios = 20, 35, and 50, respectively, and (m–o) 29Si MAS NMR of spent Na-ZSM-5 catalysts with the SiO2/Al2O3 molar ratios = 20 ,35, and 50, respectively.
