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- W2000889256 abstract "Abstract The gallosilicate analog of zeolite mordenite has been synthesized and characterized. Evidence for the presence of gallium in the lattice framework is obtained from chemical analysis, XRD, framework i.r., FTi.r., and 71Ga MAS n.m.r. spectroscopies, d.t.a./t.g., and catalytic activity data. Chemical analysis and n.m.r. confirm the absence of significant amounts of Al in the zeolite ( SiO 2 Al 2 O 3 > 1000 ). Lattice Ga leads to an increase in the X-ray “d” values. The framework i.r. bands are shifted to lower frequencies on Ga incorporation in the lattice. The gallomordenite sample exhibits both product-shape selectivity and restricted transition-shape selectivity comparable to Al-mordenite, whereas disproportionation was found to be more for Ga-mordenite than for Al-mordenite due to higher ratio of Lewis to Bronsted acid sites, as could be inferred from the FTi.r. spectra on chemisorption of pyridine molecules." @default.
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- W2000889256 date "1993-07-01" @default.
- W2000889256 modified "2023-10-17" @default.
- W2000889256 title "Synthesis and characterization of a gallosilicate analog of zeolite mordenite" @default.
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- W2000889256 doi "https://doi.org/10.1016/0144-2449(93)90122-j" @default.
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