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Ditemukan 3 dari pencarian Anda melalui kata kunci: author=Michel Che
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Role of tetrahedral Co(II) sites of CoSiBEA zeolite in the selective catalyti…
Komentar Bagikan
Tetsuya ShishidoStanislaw DzwigajJanusz JanasMichel Che

Abstract. The CoSiBEA zeolites are prepared by a two-step postsynthesis method which allows to incorporate cobalt in BEA zeolite as isolated tetrahedral Co(II) species. The incorporation of Co ions in vacant T-sites and their reaction with silanol groups are evidenced by XRD and FTIR respectively. It does not generate acidic Brønsted sites as shown by FTIR of adsorbed pyridine. The state o…

Edisi
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ISBN/ISSN
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Deskripsi Fisik
Applied Catalysis B: Environmental 89 (2009) 196–203
Judul Seri
Applied Catalysis B: Environmental
No. Panggil
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Effect of iron impurities on the catalytic activity of BEA, MOR and MFI zeoli…
Komentar Bagikan
Stanislaw DzwigajJanusz JanasMichel CheWojciech RojekLorenzo StievanoFriedrich E. WagnerFrederic Averseng

Abstract. The combined use of chemical analysis, XRD, EPR and Mossbauer techniques provides detailed information on the nature of iron impurities in commercial BEA, MOR and MFI zeolites. EPR and Mo¨ ssbauer spectroscopies evidence that iron impurities are present mainly as tetrahedral Fe(III) species and to a minor extent as octahedral Fe(III) species, with relative amounts depending on th…

Edisi
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ISBN/ISSN
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Deskripsi Fisik
Applied Catalysis B: Environmental 86 (2009) 45–52
Judul Seri
Applied Catalysis B: Environmental
No. Panggil
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Do Cu(II) ions need Al atoms in their environment to make CuSiBEA active in t…
Komentar Bagikan
Tetsuya ShishidoStanislaw DzwigajJanusz JanasJacek GurgulRobert P. SochaMichel Che

Abstract. The two-step postsynthesis method (creation of vacant T-sites and associated SiOH groups by dealumination of BEA zeolite with nitric acid followed by incorporation of copper in the resulting SiBEA by impregnation with an aqueous solution of copper nitrate) allows to obtain a CuSiBEA zeolite which contains 0.8 Cu wt%. The incorporation of Cu(II) into the lattice of SiBEA is evidenc…

Edisi
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ISBN/ISSN
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Deskripsi Fisik
Applied Catalysis B: Environmental 85 (2009) 131–138
Judul Seri
Applied Catalysis B: Environmental
No. Panggil
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