61 Surface interactions between hetero atoms of petcoke and potassium catalyst during pressurized steam gasification

スポンサーリンク

概要

• 論文の詳細を見る

• Steam gasification of green petcoke without and with 5 mass% K is carried out with a pressurized fixed bed reactor, and the raw coke and the gasified samples with bum off of 11-64% are subjected mainly to the X-ray photoelectron spectroscopy (XPS) analysis to examine the changes in surface chemical states of inherent hetero atoms as well as the K added. The comparison of the S 2p spectra shows the appearance of new species in the presence of the catalyst. No Ni signals are observed in any cases. On the other hand, very unexpectedly, strong V 2p peaks appear after the uncatalyzed or K-catalyzed reaction at 900 or 750℃, respectively, meaning the drastic surface enrichment of V atoms, and the spectrum observed with the K-bearing gasified sample provides the higher binding energy. It is likely that part of the K catalyst on the petcoke surface is transformed into K-S-V species in the gasification process.

• 2008-10-09

著者

• Byambajav Enkhsaruul

  Tohoku University

• Ohtsuka Yasuo

  Tohoku University

関連論文

• 61 Surface interactions between hetero atoms of petcoke and potassium catalyst during pressurized steam gasification
• 34 Characterization of Fe and Ni catalysts supported on Canadian peat-derived activated carbons and their performance in the decomposition of ammonia gas for hot gas cleanup

スポンサーリンク