Aromatic Hydrogenation Catalysis: A Review

Stanislaus, A.; Cooper, Barry H.

doi:10.1080/01614949408013921

Cited by 819 publications

(518 citation statements)

References 133 publications

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“…It is used in lowering the aromatic content in diesel fuels for environmental reasons [2]. Much of the aromatic content in fuels comes from Pyrolysis gasoline (PyGas), which is a by-product of high temperature naphtha cracking to produce ethylene and propylene.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation of alkylaromatics over Rh/silica

Alshehri

Weinert

Jackson

2017

Reac Kinet Mech Cat

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The hydrogenation, and competitive hydrogenation, of toluene, ethylbenzene, propylbenzene and the xylenes has been studied over a rhodium catalyst in the liquid phase at 323 K and 3 barg. The reactivity of the aromatics gave an order of para-xylene > ortho-xylene > metaxylene > toluene > ethylbenzene >> propylbenzene. Kinetic analysis revealed that the order of reaction in hydrogen was typically first order while the reaction order in toluene was zero order and negative half order for ethylbenzene. The reaction order for propylbenzene and the xylenes was negative first order. Apparent activation energies were calculated and all were in the range 26-46 kJ.mol -1 . Competitive hydrogenation between toluene, ethylbenzene and propylbenzene revealed that the propylbenzene was the most strongly adsorbed aromatic in agreement with the strongly negative reaction order. The xylenes gave an order of reactivity of para > ortho > meta following the increasing negative reaction order. Reactions with deuterium revealed an inverse kinetic isotope effect, most likely related to the change in hybridization of the carbon from sp 2 to sp 3 , for all reactions, except that of ortho-xylene.

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Section: Introductionmentioning

confidence: 99%

Hydrogenation of alkylaromatics over Rh/silica

Alshehri

Weinert

Jackson

2017

Reac Kinet Mech Cat

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“…In recent years, more and more attention has been paid to aromatic hydrogenation in diesel fuel because aromatics lower the combustion efficiency (cetane index) and increase the undesirable emissions from diesel engines (1)(2)(3). Noble metal catalysts exhibit high activity for aromatic hydrogenation, but such catalysts are generally sensitive to sulfur poisoning.…”

Section: Introductionmentioning

confidence: 99%

“…Noble metal catalysts exhibit high activity for aromatic hydrogenation, but such catalysts are generally sensitive to sulfur poisoning. In recent years, the sulfur resistance of noble metal catalysts has been extensively investigated (1)(2)(3).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Chromium on Sulfur Resistance of Pd/HY–Al2O3 Catalysts for Aromatic Hydrogenation

Xia

et al. 2001

Journal of Catalysis

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“…Too high aromatic contents in diesel fuels have been recognized as detrimental both in lowering the fuel qualities and in contributing significantly to the formation of undesirable tailpipe emissions [1][2][3]. For the sake of environment protection, more stringent legislations associated with clean fuels have been made [2,4].…”

Section: Introductionmentioning

confidence: 99%

“…Commercially, two technologies are being employed for improving diesel qualities by the removal of polynuclear aromatics, aromatic saturation (ASAT) and hydrocracking [1,2,5]. However, both of them have some limitations [5].…”

Section: Introductionmentioning

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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Aromatic Hydrogenation Catalysis: A Review

Cited by 819 publications

References 133 publications

Hydrogenation of alkylaromatics over Rh/silica

Hydrogenation of alkylaromatics over Rh/silica

The Effect of Chromium on Sulfur Resistance of Pd/HY–Al2O3 Catalysts for Aromatic Hydrogenation

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

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