caa a22 4500 46325208X CHVBK 20180405153343.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10562-007-9223-5 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9223-5 A study of the Influence of the Synthesis Conditions upon the Catalytic Properties of LaMnO3.15 in Methane Combustion in the Absence and Presence of H2S [Elektronische Daten] [A. Kaddouri, S. Ifrah, P. Gelin] We report here on the activity and stability of LaMnO3.15 for the methane combustion, in the absence and presence of H2S, in a temperature interval of 250-750°C. Two powders with different specific surface area were prepared by coprecipitation method using ammonia. Precursors calcined at high temperature, in air, for 10h have led to LaMn-C solid with SBET=11m2/g, while those previously aged in solution (hydrothermal treatment at 200°C under 20atm. for 24h) then calcined at high temperature led to LaMn-HydC with SBET=31m2/g. Temperature programmed reduction (TPR) profile of both samples showed two main peaks; surface and weakly bound oxygen named α-oxygen species and lattice oxygen β-oxygen species. While for LaMn-C the maximum reduction temperature peak corresponding to α-oxygen species was found to be ca. 600°C, for LaMn-HydC samples this peak was shifted to lower temperature ca. 430°C. Indeed, LaMn-HydC samples showed higher depletion of surface and weakly bound oxygen species compared to LaMn-C. The superior catalytic performance of LaMn-HydC in methane combustion was attributed to its high BET surface area and to both the high amount of α-oxygen species and their mobility. In the presence of 100ppm H2S in the feed this catalyst showed a higher propensity to poisoning by sulphur compounds than LaMn-C. This was attributed to the rapid formation of stable sulphate/sulphite species, the decomposition of which occurs above 800°C. Springer Science+Business Media, LLC, 2007 LaMnO3 .15 nationallicence Hydrothermal treatment nationallicence Oxygen depletion nationallicence Methane combustion nationallicence Sulphur poisoning nationallicence Kaddouri A. IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 av. Albert Einstein, 69626, Villeurbanne, France aut Ifrah S. IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 av. Albert Einstein, 69626, Villeurbanne, France aut Gelin P. IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 av. Albert Einstein, 69626, Villeurbanne, France aut Catalysis Letters Springer US; http://www.springer-ny.com 119/3-4(2007-12-01), 237-244 1011-372X 119:3-4<237 2007 119 10562 https://doi.org/10.1007/s10562-007-9223-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9223-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kaddouri A. IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 av. Albert Einstein, 69626, Villeurbanne, France aut NATIONALLICENCE 700 1- Ifrah S. IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 av. Albert Einstein, 69626, Villeurbanne, France aut NATIONALLICENCE 700 1- Gelin P. IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 av. Albert Einstein, 69626, Villeurbanne, France aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 119/3-4(2007-12-01), 237-244 1011-372X 119:3-4<237 2007 119 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer