Abstract
In this study, nano catalyst LaNiO3 with perovskite structure was synthesized using the citrate sol–gel method in the combined methane reforming with CO2 and O2 (CRM). The effects of increasing the surface area of the LaNiO3 perovskite on the catalytic activity were investigated by changing the method of preparing and creating holes in the surface of the samples. Physical and chemical properties of the samples, before and after the reactor test, were determined through ICP, AA, XRD, TGA, TPR, BET, SEM, EDX and TEM techniques. The results of XRD, ICP, AA, SEM, EDX and TEM tests indicated that the citrate sol–gel method is a good way to prepare a homogeneous perovskite LaNiO3 sample on a scale of nanometers. The results of the TPR test showed using etching in the citrate sol–gel method can produce samples with high stability. The BET results indicated that the surface area of the LaNiO3 sample tripled with the method suggested in this paper. Changes in preparation method lead to induction time decreasing and temperature increasing. Use of etching in the citrate sol gel method had no significant effect in the results of activity tests versus time reaction at a temperature of 800 °C. TGA curves revealed no production of coke over the process for the produced samples.
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The authors gratefully acknowledge the financial support of this work by Iranian National Science Foundation. Funding was provided by Iran National Science Foundation (Grant No. 93038553).
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Jahangiri, A., Saidi, M., Salimi, F. et al. Combined methane reforming over nano LaNiO3 catalyst with modified active surface. Res Chem Intermed 44, 1755–1773 (2018). https://doi.org/10.1007/s11164-017-3196-9
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DOI: https://doi.org/10.1007/s11164-017-3196-9