TPD of cyclic hydrocarbons in silicalite-1 studied by intelligent gravimetry

• Published in: Thermochimica acta Vol. 439; no. 1; pp. 121 - 126
• Main Authors: Ban, Hongyan, Gui, Jianzhou, Zhang, Xiaotong, Dai, Min, Song, Lijuan, Sun, Zhaolin, Rees, Lovat V.C.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2005; Elsevier Science
• Subjects: Chemistry; Desorption; Exact sciences and technology; General and physical chemistry; Ion-exchange; Silicalite-1; Surface physical chemistry; Thermogravimetry; TPD; Zeolites: preparations and properties; TPD; Desorption; Silicalite-1; Thermogravimetry; Hydrocarbon; Thermodesorption; Zeolite; Cycloalkane; Molecular sieve; Benzene; Cyclohexane; Thermal analysis; Cyclopentane
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2004.08.017

Temperature-programmed desorption (TPD) of cyclopentane, benzene and cyclohexane in silicalite-1 from room temperature to 400 °C at different loading has been investigated by intelligent gravimetry. TPD of cyclopentane and benzene at different heating rates (5, 10, 15 and 20 °C/min) has also been studied. There are two different peaks in cyclopentane and benzene TPD profiles at loading over four molecules per unit cell. Only one peak appears at loading lower than (or equal to) four molecules per unit cell in cyclopentane and benzene TPD profiles and in cyclohexane TPD profiles. The maximum desorption peak temperature increases with the increasing of initial adsorbate loading.