Abstract
The impact of adding La2O3 and CeO2 separately or in combination to a Ni-Al2O3 catalyst on the volatile components of biomass pyrolysis is examined in this study. This study focuses on the effects of varying pyrolysis temperatures and catalyst usage cycles on catalytic reforming, evaluating the resulting pyrolysis yield, syngas composition, and catalyst stability. Catalyst characteristics are also analyzed. The results of this study show that the Ni-Al2O3 catalyst modified with La2O3 alone produces a 9 % reduction in tar yield and a 20 % increase in the CO + H2 fraction of the pyrolysis gas compared to the control group. When modified with CeO2 alone, the Ni-Al2O3 catalyst keeps a tar conversion efficiency above 43 % after ten consecutive usage cycles. The addition of La2O3 and CeO2 simultaneously led to a 19 % increase in hydrogen yield, with the absolute content of alcohols, ketones, and esters reaching zero at 850°C.
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