Dehydrogenation and aromatization of propane over rhenium-modified HZSM-5 catalyst

Guo, Jianjun; Liu, Hui; Zhao, Hong; Zheng, Lihe; Zheng, Xiaoming

doi:10.1016/j.molcata.2005.06.019

Cited by 29 publications

(11 citation statements)

References 20 publications

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“…Direct information about the intermediates of methane transformation over metal-loaded zeolite surface has been obtained. This study is important to an understanding of the methane dehydroaromatization at mild temperature under nonoxidative conditions and also is complementary to our former studies [19][20][21][22][23] on methane conversion with adding of propane over several metal loaded HZSM-5 catalysts under mild conditions.…”

Section: Introductionsupporting

confidence: 55%

Adsorption properties of methane on Mo and Pd–Ga loaded HZSM-5 at mild temperature

Shen

Liu

et al. 2007

Catal Lett

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Methane adsorption on Mo/HZSM-5 and Pd-Ga/HZSM-5 was investigated by TPD. Even at 323 K, methane could adsorb on the catalysts. It dissociated transferred to the high hydrocarbons with temperature increase. The enough concentration of intermediates is necessary step for aromatics formation. The higher ability of hydrogenation over Pd-Ga/HZSM-5 than that over Mo/HZSM-5 was probably the reason for the rich in hydrogenation products and the lack of H 2 .

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Section: Introductionsupporting

confidence: 55%

Adsorption properties of methane on Mo and Pd–Ga loaded HZSM-5 at mild temperature

Shen

Liu

et al. 2007

Catal Lett

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“…The special framework structure and the unique pore diameter of ZSM-5 result in excellent properties, and therefore, ZSM-5 is used widely as a shapeselective catalyst in many important industrial processes such as alkylation [1], catalytic aromatization [2], disproportionation [3], and so on. Toluene alkylation with methanol has particular virtues like high para-selectivity and low yield of benzene, showing a promising route to synthesize para-xylene, which is a key intermediate in the synthesis of terephthalic acid and terephthatate, using to make polyesters.…”

Section: Introductionmentioning

confidence: 99%

Lanthanum Oxides-Improved Catalytic Performance of ZSM-5 in Toluene Alkylation with Methanol

et al. 2009

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Lanthanum oxides were real time modified to ZSM-5 during the hydrothermal synthesis of the zeolite. The addition of lanthanum oxides does not change the basic structure of ZSM-5, but obviously decrease the crystallinity and BrÖ nsted acid amount. The catalysis tests show that modification of ZSM-5 with lanthanum oxides significantly suppresses the coke formation on the catalyst surface and improves the catalyst stability, which is likely associated with the decrease of BrÖ nsted acid amounts and a promotional function of lanthanum oxides for the reaction between coke and water.

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“…Similarly, preliminary reports of using Re/HZSM-5 for dehydrogenation and aromatization of propane have appeared [11,12]. Re/HZSM-5 is a bifunctional catalyst where Re is responsible for the dehydrogenation of ethane to ethene and the acidic sites on the zeolite support are responsible for the further conversion of ethene into aromatics [13,14].…”

Section: Resultsmentioning

confidence: 95%

Dehydrogenation of Light Alkanes Over Rhenium Catalysts on Conventional and Mesoporous MFI Supports

et al. 2006

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Recently, Re/HZSM-5 (Si/Al = 15) was shown to be an efficient catalyst for ethane dehydrogenation and aromatization at 823 K and atmospheric pressure. In this reaction, the major initial products were benzene, toluene and xylene (BTX), but increasing amounts of ethene were produced with time on stream due to deactivation of the catalyst. We show that by use of rhenium impregnated MFI supports with very few or no acidic sites (Si/Al > 500), highly selective ethane dehydrogenation catalysts are obtained with ethene selectivities of 98%. By use of mesoporous MFI supports (Si/Al >500) the lifetime of the catalyst appears to be slightly improved compared to conventional MFI crystals. The beneficial effect of a mesoporous MFI support is convincingly demonstrated in propane dehydrogenation, where both conversion and selectivities on the mesoporous MFI (Si/Al > 500) impregnated with Re are significantly higher than on Re supported on a comparable conventional MFI support.

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Dehydrogenation and aromatization of propane over rhenium-modified HZSM-5 catalyst

Cited by 29 publications

References 20 publications

Adsorption properties of methane on Mo and Pd–Ga loaded HZSM-5 at mild temperature

Adsorption properties of methane on Mo and Pd–Ga loaded HZSM-5 at mild temperature

Lanthanum Oxides-Improved Catalytic Performance of ZSM-5 in Toluene Alkylation with Methanol

Dehydrogenation of Light Alkanes Over Rhenium Catalysts on Conventional and Mesoporous MFI Supports

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