The promotion effect of catalytic activity by Ru substitution at the B site of LaSrCrRuO for propane steam reforming.

A series of LaSrCrRuO (0.1 ≤ x ≤ 0.5, 0.05 ≤ y ≤ 0.15) materials was prepared by the sol-gel method to develop alternative catalysts for propane steam reforming. Catalyst characteristics were evaluated using physicochemical methods including X-ray diffraction, Brunauer-Emmett-Teller methods, H temperature-programmed reduction, and thermogravimetry analysis (TGA). Effects of the amount of ruthenium (Ru) and strontium and the steam-to-carbon ratio (S/C) were investigated. An increase in Ru content led to increased propane conversion and H yield, especially below 700 °C. Dramatic enhancement of catalytic activity was observed with LaSrCrRuO under 600 °C, achieving propane conversion over 79% between 600 and 800 °C with maximum propane conversion and H yield of 98.3% and 63.3%, respectively. Also, good resistance to carbon formation for the LaSrCrRuO catalyst was confirmed by long-term testing and TGA analysis. [ABSTRACT FROM AUTHOR]