Journal ArticleDOI
Effects of noble metals doped on mesoporous LaAlNi mixed oxide catalyst and identification of carbon deposit for reforming CH4 with CO2
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TLDR
The effect of the B cation on surface properties and catalytic activity in the dry reforming reaction over La 0.8O3 (M=noble metal) perovskite-type oxides with surface area 3.26-4.14m2 g and rhombohedral structure was studied in this article.Abstract:
BACKGROUND
The effect of the B cation on the surface properties and catalytic activity in the dry reforming reaction over La0.4M0.6Al0.2Ni0.8O3 (M=noble metal) perovskite-type oxides with surface area 3.26–4.14 m2 g–1 and rhombohedral structure was studied.
RESULTS
Among LaAlxNi1-xO3 series, LaAl0.2Ni0.8O3 had the highest catalytic activity, but suffered a slow deactivation with time-on-stream (TOS). It is observed that all samples presented similar activity at low reaction temperatures (500–600°C), while at higher temperatures (600–850°C) the prepared solid was more active and perovskite phase was transformed into Ni0 or La2O2CO3. It was found that among the noble metal samples, La0.4Rh0.6Al0.2Ni0.8O3 possessed the highest surface area and surface oxygen concentration and the best low-temperature reducibility. For the Rh catalyst the CH4 and CO2 conversions were 89.1 and 86.2%, which were the most resistant against coke deposition and showed very high stability without decrease in reforming and remained constant during the 3000 min TOS. The following order of activity was observed: La0.4Rh0.6Al0.2Ni0.8O3 > La0.4Ru0.6Al0.2Ni0.8O3 > LaAl0.2Ni0.8O3> La0.4Ir0.6Al0.2Ni0.8O3 ≥La0.4Pt0.6Al0.2Ni0.8O3 > La0.4Pd0.6Al0.2Ni0.8O3.
CONCLUSIONS
It is believed that the high surface area and surface oxygen concentration and good low-temperature reducibility were responsible for the good catalytic performance of the La0.4Rh0.6Al0.2Ni0.8O3 sample. © 2013 Society of Chemical Industryread more
Citations
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References
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Carbon dioxide reforming of methane over nickel alkaline earth metal oxide catalysts
Eli Ruckenstein,Yun Hang Hu +1 more
TL;DR: In this article, a CO2 reforming of CH4 over reduced NiO/alkaline earth metal oxide catalysts was investigated, and a CO yield of 95% was obtained from a stoichiometric feed mixture of CH 4 and CO 2, at high GHSV (60 000 cm3 g−1 h−1), over a reduced NiOMgO with a weight ratio of 0.2.
Journal ArticleDOI
Production of synthesis gas via methane reforming with CO2 on noble metals and small amount of noble-(Rh-) promoted Ni catalysts
TL;DR: Several supported metal (Ru, Rh, Pt, Pd, Ir, Ni, Co) catalysts were prepared and used for methane reforming with CO 2, while their activity was lower than that of Ni and Co as discussed by the authors.
Journal ArticleDOI
Carbon dioxide reforming of methane to synthesis gas over Ni/La2O3 catalysts
TL;DR: In this article, the Ni/La2O3 catalyst was used for carbon dioxide reforming of methane to synthesis gas, and it was found that the Ni surface is blocked by lanthanum species.