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- W2052206985 abstract "A simple method is proposed to prepare In,H-ZSM-5 catalyst for DeNOx reactions. This consists of mechanically mixing the fine powders of In2O3 and H-ZSM-5 followed by heating in oxygen free inert gas flow to 580 °C where indium undergoes thermal auto-reduction and moves into exchange positions as In+ without destroying the crystalline structure of the zeolite. It was evidenced by IR, temperature-programmed reduction (TPR) and reoxidation that, once In+ was introduced into the lattice either by reductive solid-state ion exchange (RSSIE) or by thermal auto-reductive SSIE, it can be oxidized by O2 or in the DeNOx reaction to (InO)+. The formed (InO)+ can easily be reduced to In+ suggesting that In,H-ZSM-5 might be a good catalyst for reactions where a redox cycle in the catalyst is involved in the reaction mechanism. Selective catalytic reduction (SCR) by methane proved that only a small fraction of In exchanged, together with some acid sites of the zeolite formed the active center for the catalytic reaction. XRD, XPS and FT-IR using pyridine proved that the structure of the zeolite and these centers are stable under reaction conditions and In is mainly in the form of (InO)+ in the used catalyst." @default.
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- W2052206985 date "2009-05-01" @default.
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- W2052206985 title "Preparation of In,H-ZSM-5 for DeNOx reactions by solid-state ion exchange" @default.
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- W2052206985 doi "https://doi.org/10.1016/j.cattod.2008.09.027" @default.
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