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Temperature-programmed desorption (TPD) of ammonia from the H form of a mordenite after different pretreatment temperatures

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Abstract

Temperature-programmed desorption of ammonia from the H form of a modernite was carried out after pretreatment at different temperatures. It could be shown that a quantitative registration of the acidic OH groups is possible. Moreover, from the desorption curves, information is obtained about the alteration of the acidic properties as a function of the temperature of pretreatment.

Zusammenfassung

Es wurde die Temperatur-Programmierte Desorption von Ammoniak an der H-Form eines Mordenits nach Vorbehandlung bei unterschiedlichen Temperaturen untersucht. Es konnte gezeigt werden, daß damit eine quantitative Erfassung der Anzahl der sauren OH-Gruppen möglich ist. Außerdem erhält man aus den Desorptionskurven Hinweise über die Veränderung der sauren Eigenschaften in Abhängigkeit von der Vorbehandlungstemperatur.

Резюме

Иучена температурно-программная десорбц ия аммиака на Н-форме мор денита, предварительно обра ботанного при различ ных температурах. Показа на возможность количественного опр еделения кислотных О Н групп. Кроме того, данные пол ученные на основе кривых десорбции ука зывают на изменение к ислотных свойств морденита в з ависимости от температуры его обра ботки.

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Authors and Affiliations

  1. Department of Chemistry, Karl-Marx-University Leipzig, DDR-7010, Leipzig, GDR

    B. Hunger, J. Hoffmann & P. Mothsche

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  1. B. Hunger
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  2. J. Hoffmann
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  3. P. Mothsche
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Hunger, B., Hoffmann, J. & Mothsche, P. Temperature-programmed desorption (TPD) of ammonia from the H form of a mordenite after different pretreatment temperatures. Journal of Thermal Analysis 32, 2009–2014 (1987). https://doi.org/10.1007/BF01913993

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  • DOI: https://doi.org/10.1007/BF01913993

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