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- W2777222803 abstract "Abstract Substituting metals for either aluminum or phosphorus in crystalline, microporous aluminophosphates creates Brønsted acid sites, which are well known to catalyze several key reactions, including the methanol to hydrocarbons (MTH) reaction. In this work, we synthesized a series of metal‐substituted aluminophosphates with AFI topology that differed primarily in their acid strength and that spanned a predicted range from high Brønsted acidity (H‐MgAlPO‐5, H‐CoAlPO‐5, and H‐ZnAlPO‐5) to medium acidity (H‐SAPO‐5) and low acidity (H‐TiAlPO‐5 and H‐ZrAlPO‐5). The synthesis was aimed to produce materials with homogenous properties (e.g. morphology, crystallite size, acid‐site density, and surface area) to isolate the influence of metal substitution. This was verified by extensive characterization. The materials were tested in the MTH reaction at 450 °C by using dimethyl ether (DME) as feed. A clear activity difference was found, for which the predicted stronger acids converted DME significantly faster than the medium and weak Brønsted acidic materials. Furthermore, the stronger Brønsted acids (Mg, Co and Zn) produced more light alkenes than the weaker acids. The weaker acids, especially H‐SAPO‐5, produced more aromatics and alkanes, which indicates that the relative rates of competing reactions change upon decreasing the acid strength." @default.
- W2777222803 created "2018-01-05" @default.
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- W2777222803 date "2017-12-18" @default.
- W2777222803 modified "2023-10-14" @default.
- W2777222803 title "A Systematic Study of Isomorphically Substituted H-MAlPO-5 Materials for the Methanol-to-Hydrocarbons Reaction" @default.
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- W2777222803 doi "https://doi.org/10.1002/cphc.201701024" @default.
- W2777222803 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5838544" @default.
- W2777222803 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29250897" @default.
- W2777222803 hasPublicationYear "2017" @default.