Hydrocracking of Tetralin over NiW/USY Zeolite Catalysts: For the Improvement of Heavy-Oil Upgrading Catalysts

Sato, Koichi; Iwata, Yoshiki; Miki, Yasuo; Shimada, Hiromichi

doi:10.1006/jcat.1999.2546

Cited by 81 publications

(52 citation statements)

References 19 publications

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“…FAU zeolite is superior to the surface hydrogen transfer. 21) Hence, the active hydrogen species might be sufficiently supplied at the interface of Pd and FAU zeolite layer.…”

Section: Catalytic Activity Of Model Reactionsmentioning

confidence: 99%

Preparation of Double Layer Membrane Combined with Palladium Metal and FAU Zeolite for Catalytic Membrane Reactor

2015

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The preparation of a double-layer membrane by the combination of Pd metal and FAU zeolite was attempted to enhance the catalytic activity of the membrane reactor. The membrane was successfully synthesized on a porous ¡-Al 2 O 3 support tube by the hydrothermal synthesis of the FAU zeolite layer followed by chemical vapor deposition of the Pd layer. The thicknesses of the FAU and Pd layers were ca. 5 µm and 1 µm, respectively. The membrane functioned efficiently as a hydrogen separation membrane without deterioration, due to the rigid connection of each layer. During the model reaction, such as the reaction of benzene and permeated hydrogen species from Pd membrane, the inner surface of the Pd layer that was in contact with the FAU layer exhibited high hydrogenation activity, in contrast to the outer surface. Scanning electron microscope observations reveal that one of the reasons for this observed difference is the roughness of the inner surface. Loading of Pd particles in the micropores of FAU zeolite layer by ion-exchange treatment resulted in enhancement of the hydrogenation activity. The FAU zeolite layer is suitable for loading of the highly dispersed active metal particles. The combination of Pd metal membrane and fine metal particles has potential for acceleration of catalytic membrane reactions.

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“…FAU zeolite is superior to the surface hydrogen transfer. 21) Hence, the active hydrogen species might be sufficiently supplied at the interface of Pd and FAU zeolite layer.…”

Section: Catalytic Activity Of Model Reactionsmentioning

confidence: 99%

Preparation of Double Layer Membrane Combined with Palladium Metal and FAU Zeolite for Catalytic Membrane Reactor

2015

Self Cite

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“…As a result, with ''real'' feeds, rates are usually increased with increasing hydrogen partial pressure, in contrast to the negative order expected on the basis of model kinetics for n-alkanes [110], with only very few exceptions. Close proximity of hydrogenation sites and acid sites should also help to reduce reactions contributing to coking [145][146][147][148] insofar as they are diffusion limited. From the above scheme, Figure 18.13, an obvious design parameter is the relative importance of the (de)hydrogenation and the cracking functions.…”

Section: Hydrocracking Catalyst Systems and Catalytic Chemistrymentioning

confidence: 99%

Cracking and Hydrocracking

Rigutto¹

2010

Zeolites and Catalysis

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“…Identification of most of the reaction products was performed on a GC-MS (Agilent 6890-5973). Meanwhile, we compared those GC patterns with that in SatoÕs work [30].…”

Section: Product Analysismentioning

confidence: 99%

Coupled hydrogenation and ring opening of tetralin on potassium modified Pt/USY catalysts

Yang

Wen

et al. 2007

Catal Lett

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Coupled hydrogenation and ring opening of tetralin (THN) on Pt/USY catalyst were performed on a high-pressure fixed-bed reactor. The effect of reaction temperature in range of 100-300°C and the nature of the catalyst (metal and acid sites) on the catalytic performance were studied. The results indicated that the extent of hydrocracking, a sequential reaction of ring opening, should be reduced in order to maintain high yields of the ring opening products (ROP). Introduction of the Pt component accelerated the hydrogenation and ring opening of the THN significantly. It was also found to be an effective way to optimize the acid properties of the catalysts by introducing an appropriate amount of potassium to the catalyst, such that the strong acid sites of the catalysts were diminished, and a higher ROP yield could be obtained as a result of the inhibiting of the hydrocracking activity of the catalyst. When the yield of the C10 fractions could be maintained at 90 wt.%, then a maximal ROP yield of 35.6 wt.% could be obtained on a 0.5 wt.% Pt/USY catalyst loaded with 2.0 wt.% of K.

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Hydrocracking of Tetralin over NiW/USY Zeolite Catalysts: For the Improvement of Heavy-Oil Upgrading Catalysts

Cited by 81 publications

References 19 publications

Preparation of Double Layer Membrane Combined with Palladium Metal and FAU Zeolite for Catalytic Membrane Reactor

Preparation of Double Layer Membrane Combined with Palladium Metal and FAU Zeolite for Catalytic Membrane Reactor

Cracking and Hydrocracking

Coupled hydrogenation and ring opening of tetralin on potassium modified Pt/USY catalysts

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