Steam reforming of methanol over copper–yttria catalyst supported on praseodymium–aluminum mixed oxides
In the present study, an active copper-based catalyst with long-term stability for methanol steam reforming was developed. The catalyst copper–yttria supported on praseodymium–aluminum mixed oxides was prepared by using PEG-400 as dispersion agent and Y2O3 as promoter for dispersing Cu particles to get the Cu crystallite size less than 10 nm and to increase the catalytic activity with high selectivity of CO2; alumina was used as structural enhancer to strengthen the stability of Cu–Y2O3/Pr2O3 catalyst. The prepared catalysts were characterized with BET, TEM, TGA and XRD. Using Cu(25)Y2O3(10)/(Pr2O3(50)Al2O3(50))(65) in a fixed-bed reactor, the H2 yield reached 99.1% at 280 °C with CO2 selectivity above 98%, and the H2 production rate at 320 °C only slightly decreased from 120 to 109 mmol/(s⋅kgcat) in 100 h of duration at 4.6 h− 1 of weight hourly space velocity based on methanol. The high stability of catalyst Cu–Y2O3/Pr2O3–Al2O3 showed a good performance in methanol steam reforming.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The high stability catalyst Cu–Y2O3/Pr2O3–Al2O3 (CYPA) for SRM was developed. ► CYPA was prepared by precipitation and reduction with dispersion agent PEG-400. ► The catalyst with Cu size < 10 nm was characterized by BET, TEM, TGA, and XRD. ► Using CYPA, 99% of H2 yield and 98% of CO2 selectivity at 280 °C were obtained. ► The 100-h test at 320 °C for CYPA showed a decrease of <10% in H2 production rate.
Journal: Catalysis Communications - Volume 12, Issue 15, 15 September 2011, Pages 1389–1395