Oxidative dehydrogenation of ethylbenzene to styrene with CO2 over SnO2–ZrO2 mixed oxide nanocomposite catalysts

Burri, David Raju; Choi, Kwang-Min; Han, Dae-Soo; Sujandi,; Jiang, Nanzhe; Burri, Abhishek; Park, Sang-Eon

doi:10.1016/j.cattod.2007.10.031

Cited by 48 publications

(34 citation statements)

References 20 publications

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“…As noticed earlier, the conversion and selectivity were slightly lower in the first 2-3 h of the reaction and increased thereafter. A significant difference in the EB conversion, styrene selectivity and catalyst stability were noted in the presence (CO 2 ) and absence (N 2 ) of CO 2 feed gas inline with previous studies [23,29]. As elaborated elsewhere [5,6], a simple dehydrogenation of EB takes place in the absence of CO 2 (Eq.…”

Section: Resultssupporting

confidence: 68%

“…To understand the potential role of CO 2 in directing the product formation and catalyst stability, we have investigated various samples for their activity and selectivity in the presence and absence of CO 2 [23,29]. As noticed earlier, the conversion and selectivity were slightly lower in the first 2-3 h of the reaction and increased thereafter.…”

Section: Resultsmentioning

confidence: 93%

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Oxidative Dehydrogenation of Ethylbenzene to Styrene with Carbon Dioxide over Fe2O3/TiO2–ZrO2 Catalyst: Influence of Chloride

et al. 2008

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This study was undertaken to know the influence of chloride ions in TiO 2 -ZrO 2 mixed oxide and to explore chloride containing Fe 2 O 3 /TiO 2 -ZrO 2 catalyst for oxidative dehydrogenation of ethylbenzene to styrene utilizing carbon dioxide as a soft oxidant. The TiO 2 -ZrO 2 mixed oxide was synthesized by a co-precipitation method. Over the calcined support, a nominal 15 wt.% Fe 2 O 3 was deposited by a wet impregnation method. The prepared catalysts were characterized using X-ray diffraction, temperature programmed desorption of NH 3 and CO 2 , scanning electron microscopy and BET surface area methods. The catalytic activity measurements were made in a fixed-bed microreactor under normal atmospheric pressure. Characterization studies reveal that chloride ions exhibit a strong influence on the physicochemical and catalytic properties of the titania-zirconia composite oxides. The impregnated iron oxide was found to be in a highly dispersed form over the TiO 2 -ZrO 2 support and influenced greatly on its acid-base properties. The chloride containing Fe 2 O 3 /TiO 2 -ZrO 2 catalyst exhibited better activity and selectivity. The order of activity on various samples was found to be Fe 2 O 3 /TiO 2 -ZrO 2 (chloride) [ TiO 2 -ZrO 2 (chloride) [ TiO 2 -ZrO 2 .

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Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 93%

Oxidative Dehydrogenation of Ethylbenzene to Styrene with Carbon Dioxide over Fe2O3/TiO2–ZrO2 Catalyst: Influence of Chloride

et al. 2008

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“…The dehydrogenation of EB in the presence of CO 2 as an energy saving and environmentally friendly process has received much attention [10][11][12][13][14][15][16][17][18][19][20][21]. It is estimated that the energy required for producing per ton styrene in this process is 1.5-1.9 9 10 8 cal, compared with 1.5 9 10 9 cal in the current commercial process [10,11].…”

Section: Introductionmentioning

confidence: 96%

“…High performance catalysts have been screened extensively and some new catalysts were reported [12][13][14][15][16][17][18][19]. Iron oxide-based catalysts supported on Al 2 O 3 and active carbon (AC) [12,13], vanadium oxide catalysts supported on Al 2 O 3 [14][15][16], MgO [17], SBA-15 [18], and AC [19], catalysts obtained by thermal decomposition of hydrotalcite-like precursors [20], and ZrO 2 [21] catalysts exhibited high catalytic activity for EB dehydrogenation in the presence of CO 2 . Among these catalysts, vanadia supported on alumina (VO x /Al 2 O 3 ) catalysts were more stable and exhibited reasonable activity [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Dehydrogenation of Ethylbenzene in the Presence of CO2 over V Catalysts Supported on Nano-sized Alumina

Xiang

et al. 2008

Catal Lett

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Nanocrystalline alumina was prepared and was employed as a support for vanadium catalysts. The catalysts were characterized by N 2 adsorption/desorption, X-ray diffraction, TPR, UV-Vis, NH 3 -TPD, and CO 2 -TPSR. The activity and selectivity of the catalysts in ethylbenzene dehydrogenation in the presence of CO 2 were compared with vanadium supported on commercial available alumina. The catalytic activity, selectivity, and stability were enhanced by the use of nanocrystalline alumina as catalyst supports. The superior performance of the present nano-crystalline alumina catalysts was attributed to the higher surface areas, higher vanadium dispersion, and higher stability of V 5+ against reduction.

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“…[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Different supporting cobalt catalysts have been investigated for dehydrogenation of ethylbenzene, such as iron oxide, aluminium pillared clay, carbon nanotube MCM-41 and hydrotalcites. 5,9,[29][30][31][32][33] Among these, the catalysts containing mesoporous molecular sieves as supports have shown good results due to the presence of high surface area and ordered structure.…”

Section: Introductionmentioning

confidence: 99%

Studies on ethylbenzene dehydrogenation with CO2 as soft oxidant over Co3O4/COK-12 catalysts

et al. 2015

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Oxidative dehydrogenation of ethylbenzene to styrene has been studied over Co 3 O 4 supported on mesoporous silica (COK-12) with CO 2 as soft oxidant in a fixed bed reactor at atmospheric pressure in the temperature range of 723 to 923K. While COK-12 has been prepared by self-assembly method using long chain ionic surfactant i.e., P123 as template, cobalt oxide supported on COK-12 catalysts with variable Co content have been synthesised by simple wet impregnation technique. All the catalysts were characterized by N 2 adsorption -desorption, XRD, FT-IR, TPR, UV-Vis and XPS techniques. XRD and pore size distribution studies indicate the intactness of mesoporous structure of SiO 2 even after incorporation of Co 3 O 4 . Presence of Co 3 O 4 crystallites were observed beyond 5 wt% Co loading. High ethylbenzene conversion and stable styrene yields have been observed over 3% Co 3 O 4 /COK-12 catalyst due to the presence of large number of active Co 3 O 4 catalytic sites. Enhancement in the activity has been observed with CO 2 as soft oxidant than with N 2 as diluent. This is because of the fact that the liberated H 2 reacts with CO 2 in the form of reverse water gas shift reaction.

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Oxidative dehydrogenation of ethylbenzene to styrene with CO2 over SnO2–ZrO2 mixed oxide nanocomposite catalysts

Cited by 48 publications

References 20 publications

Oxidative Dehydrogenation of Ethylbenzene to Styrene with Carbon Dioxide over Fe2O3/TiO2–ZrO2 Catalyst: Influence of Chloride

Oxidative Dehydrogenation of Ethylbenzene to Styrene with Carbon Dioxide over Fe2O3/TiO2–ZrO2 Catalyst: Influence of Chloride

Dehydrogenation of Ethylbenzene in the Presence of CO2 over V Catalysts Supported on Nano-sized Alumina

Studies on ethylbenzene dehydrogenation with CO2 as soft oxidant over Co3O4/COK-12 catalysts

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