Pd-integrated lanthanum-transition metal perovskites for methanol partial oxidation

Chia Liang Li, Chien Lin Wang, Yu Chuan Lin

研究成果: Article同行評審

23 引文 斯高帕斯(Scopus)

摘要

Palladium integrated lanthanum-transition metal perovskites (LaMnO 3, LaFeO3, and LaCoO3) were employed in methanol partial oxidation to formaldehyde. The crystallinity of these perovskites remained unchanged by incorporating up to 5 mol% Pd cations into their respective frameworks. Such a cation replacement could yield a positive effect on particle size and catalyst reducibility. The Pd cation exists in perovskites mostly as Pd2+. Under partial oxidation conditions, the reactivity and formaldehyde selectivity of Pd-free perovskites were relatively low compared to their Pd-impregnated counterparts. Most importantly, the reaction mechanism could be promoted diversely. For Pd-free perovskites, methanol combustion, methanol oxidation to syngas and water, and methanol dehydrogenation were found to be prominent. In contrast, methanol partial oxidation to formaldehyde and methanol dehydrogenation were the major pathways of Pd-integrated catalysts. Both reactions can be seen as major factors in the elevation of formaldehyde selectivity.

原文English
頁(從 - 到)135-140
頁數6
期刊Catalysis Today
174
發行號1
DOIs
出版狀態Published - 2011 十月 2

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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