Coating LaNiO3 / γ-Al2O3 catalyst in microchannel reactor for dry reforming of methane

Document Type : Research Article

Authors

Department of Chemical Engineering, Faculty of Engineering, Razi University, Kermanshah, IRAN

Abstract

A lot of researches have done on the performance of different powder from catalysts of the form in dry reforming of methane in fixed bed micro reactors. However, few reports have published on the catalyst thin layer method for using in microchannel reactor that has less mass and heat transfer limitation. Recently, sputtering and evaporation methods have investigated in microchannel reactors for making a thin-layer catalyst, but these methods have problems such as; high cost and uncontrolled catalyst loading. In this study, the catalyst coated on both sides of the stainless steel plate, and the roughness prepared among the sandblasting method. The catalyst tested in a microchannel reactor and identified the products by chromatography. In this paper, the LaNiO3 perovskite catalyst synthesized in two states with alumina support and without the support thus coated on the plate. For characterizing the catalyst EDX, XRD, SEM, FTIR have been used. The results showed that the catalyst with the support had better stability and conversion rate than the catalyst without support. The catalyst performance and its stability tested at 800°C for 28 hours. The catalyst at this temperature showed the best results in dry reforming of methane with an average ratio of H2/CO = 0.91 for catalyst without the support and an average ratio of H2 /CO = 0.97 for the catalyst with alumina support. Hence, using a microchannel reactor has various advantages compared with a fixed bed reactor, such as; increasing heat and mass transfer and using less amount of catalysts. The method of coating the catalyst in this research showed good performance and stability compared to costly coating methods, such as sputtering in microchannel reactors.

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References

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