Deactivating Species Deposited on Pt鈥揚d Catalysts in the Hydrocracking of Light-Cycle Oil

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• 作者：Pedro Casta帽o ; Alazne Guti茅rrez ; Idoia Hita ; Jos茅 M. Arandes ; Andr茅s T. Aguayo ; Javier Bilbao
• 刊名：Energy & Fuels
• 出版年：2012
• 出版时间：March 15, 2012
• 年：2012
• 卷：26
• 期：3
• 页码：1509-1519
• 全文大小：608K
• 年卷期：v.26,no.3(March 15, 2012)
• ISSN：1520-5029

文摘

The nature and composition of the coke deposited on Pt鈥揚d catalysts supported on acid carriers during the hydroprocessing (hydrocracking and hydrotreating) of light-cycle oil (LCO) has been studied. Five types of supports have been used: a commercial cracking catalyst, alumina, H尾 zeolite, and two HY zeolites (with different acidities). The hydrocracking runs have been performed at 350 掳C and 50 bar for up to 24 h. The characterization of the deactivating species on the catalyst used has been performed using temperature-programmed oxidation (TPO) coupled with mass spectrometry (MS) and Fourier transformed infrared (FTIR) spectroscopy, ultraviolet鈥搗isible (UV鈥搗is) spectroscopy, and comprehensive two-dimensional gas chromatography/mass spectrometry (GC 脳 GC/MS) analysis of the soluble coke extracted from the deactivated catalyst. The complex composition of the coke has been simplified in three families, each related to a different composition and location. The composition of the coke (and the amount of each type of coke) strongly depends upon the catalyst properties, particularly the features of the support: acidity and micropore topology.