Study of catalytic performance of LaMnO3 and LaMnO3-ZSM-5 nanocatalysts toward 2-propanol conversion

Iranian Journal of Catalysis

مقاله 11، دوره 6، شماره 1، خرداد 2016، صفحه 81-88   

نوع مقاله: Articles

نویسنده

Seyed Ali Hosseini^*

Department of Applied Chemistry, University of Urmia, Urmia, Iran.

چکیده

LaMnO₃ and LaMnO₃/ZSM-5 nano catalysts were synthesized by Pechini method and their physical-chemical properties were characterized using XRD, FTIR, SEM-EDX, UV-vis DRS, BET surface area and TPR. The correlation between characteristic properties and activity of catalysts were investigated. The catalytic performance of the catalysts was evaluated in combustion of 2-propanol and compared with 1% Pt/Al₂O₃ performance. The results of SEM and UV-Vis DRS of LaMnO₃/ZSM-5 indicated the well dispersion of the perovskite oxide on the support. The results of TPR indicated no direct correlation between the activity and reducibility of the catalysts. The catalytic studies revealed that the supporting of LaMnO₃ increased the conversion rate of 2-propanol, which is ascribed to higher surface area, more availability of catalytic sites to probe molecules. In addition, the stability of LaMnO₃/ZSM-5 was higher than that of LaMnO₃ during a 10 h time on stream. The conversion rate of 2-propanol on the LaMnO₃/ZSM-5 was higher even than that on the industrial 1%Pt/Al₂O₃ catalyst. The study showed that the perovskite/zeolite catalyst could be promising catalysts in the removal of VOCs.

کلیدواژه‌ها

Nano perovskite؛ Conversion rate؛ catalytic combustion؛ UV-Vis DRS؛ 2-Propanol

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