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Determination of the positions of aluminum atoms introduced into SSZ-35 and the catalytic properties of the generated Brønsted acid sites

Physical Chemistry Chemical Physics, ISSN: 1463-9076, Vol: 19, Issue: 9, Page: 6508-6518
2017
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The positions of aluminum (Al) atoms in SSZ-35 together with the characteristics of the generated protons were investigated by Al multiple quantum magic-angle spinning (MQ-MAS), Si MAS, and H MAS NMR data analyses accompanied by a variable temperature H MAS NMR analysis. The origin of the acidic -OH groups (Brønsted acid sites) generated by introducing Al atoms into the T sites was investigated and the T sites introduced into the Al atoms were revealed. To further determine the catalytic properties of the acidic protons generated in SSZ-35, the influence of the concentration of the Al atoms on the catalytic activity and selectivity during the transformation of toluene was examined.

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