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A series of Bi-ZSM-5 containing 4.26, 5.54, and 6.64 wt% bismuth oxide was prepared by introducing Bi during ZSM-5 synthesis. For comparison, 5 wt% Bi (expressed as bismuth oxide)-impregnated ZSM-5 samples were also prepared. These samples were characterized by N 2 adsorption-desorption isotherms at 77 K, XRD, XPS, IR spectroscopy in the lattice vibration range and in the presence of chemisorbed...
Mo 2 O52+-ZSM-5 (Mo/Al f =0.4, Si/Al f =20) samples prepared by sublimation of MoO 3 were carburized in CH 4 to form MoC x clusters active in CH 4 pyrolysis and then exposed to different CO 2 /CH 4 mixtures. CO 2 /CH 4 reactant ratios between 0 and 0.1 increased catalyst stability but decreased pyrolysis rates,...
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