Oxidative dehydrogenation of ethane to ethylene in a system with circulating microspherical metal oxide oxygen carrier: 1. Synthesis and study of the catalytic system

Хаджиев, С. Н.; Usachev, N. Ya.; Герзелиев, И. М.; Belanova, E. P.; Kalinin, V. P.; Харламов, В. В.; Kazakov, A. V.; Kanaev, S. A.; Starostina, T. S.; Popov, A. Yu.

doi:10.1134/s0965544115080125

Cited by 20 publications

(6 citation statements)

References 18 publications

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“…85 Encouraging results for ethane CL-ODH were also obtained with Mo-based redox catalysts, which gave ethylene selectivties of 93-95% and conversion up to 66.5% at 600 1C. 297,316 The oxygen storage capacity of these Mo-based redox catalysts was relatively low (o0.4 wt%), resulting in a decreasing conversion of ethane with time. Nonetheless, in a continuously operating riser reactor system, an ethane conversion of 12% at ethylene selectivities 490% was obtained with a mixed Mo-Te-V-Nb oxide supported on g-Al 2 O 3 when the contact time of ethane feed and redox catalysts was 1-2 s at 500-575 1C.…”

Section: View Article Onlinementioning

confidence: 97%

Chemical looping beyond combustion – a perspective

Zhu

Imtiaz

Donat

et al. 2020

Energy Environ. Sci.

388

179

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Section: View Article Onlinementioning

confidence: 97%

Chemical looping beyond combustion – a perspective

Zhu

Imtiaz

Donat

et al. 2020

Energy Environ. Sci.

388

179

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“…In the 500–650 °C temperature range, steady cycles of 55–85% ethylene selectivities can be achieved but ethane conversions were relatively low (7–28%). Another research group from Russia also tested a wide range of Al 2 O 3 -supported VO x and MoO x catalysts and with other types of support materials (Ga 2 O 3 or Y 2 O 3 ) in a pulse reactor. ,− Promising results were obtained on MoO x /Al 2 O 3 , and an ethylene selectivity of 94.5% can be achieved at an ethane conversion of 66.5%. The oxygen capacity of this supported MoO x catalyst is relatively low (<0.4 wt %), and the ethylene yield decreased significantly after several pulses.…”

Section: Alternative Approaches For Ethylene Productionmentioning

confidence: 99%

Recent Advances in Intensified Ethylene Production—A Review

et al. 2019

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Steam cracking is a well-established commercial technology for ethylene production. Despite decades of optimization efforts, the process is, nevertheless, highly energy and carbon intensive. This review covers the recent advances in alternative approaches that hold promise in the intensification of ethylene production from hydrocarbon feedstocks ranging from methane to naphtha. Oxidative as well as nonoxidative approaches using conventional, chemical looping, membrane, electrochemical, and plasma-assisted systems are discussed. We note that catalysts, electrocatalysts, and/or redox catalysts play critical roles in the performance of these alternative ethylene production technologies. Meanwhile, the complexity in producing polymer-grade ethylene also requires comprehensive considerations of not only (catalytic) reactions for ethylene formation but also feedstock preparation (e.g., air separation for oxidative conversion) and product separations. Although these alternative technologies have yet to be commercially implemented, a number of oxidative approaches have shown promise for close to order-of-magnitude reduction in energy consumption and CO2 emissions in comparison to steam cracking. Given the substantial progress in these research areas and the significant increase in C1 and C2 supplies resulting from the US shale gas revolution, we are excited by the enormous opportunities and potential impacts in the advancement and eventual implementation of significantly intensified ethylene production technologies.

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“…Olefins are the important building blocks in the petrochemical industry. − Traditional processes for olefin production are steam cracking, fluid catalytic cracking (FCC), and catalytic dehydrogenation (DH). ,− Cracking and DH processes are endothermic reactions and require reactors that are operated at high temperatures, consuming large amounts of thermal energy. − Also, significant and undesirable amounts of coke can be formed in the reactors, imposing severe operating constraints with frequent plant shutdowns. ,,, …”

Section: Introductionmentioning

confidence: 99%

Propane Oxidative Dehydrogenation Using Consecutive Feed Injections and Fluidizable VO_x/γAl₂O₃ and VO_x/ZrO₂–γAl₂O₃ Catalysts

Rostom¹,

Lasa

2017

Ind. Eng. Chem. Res.

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Propane oxidative dehydrogenation (PODH) was studied using VO x /γAl 2 O 3 and VO x /ZrO 2 −γAl 2 O 3 catalysts and consecutive propane injections. These catalysts were synthesized with 2.5, 5, and 7.5 wt % vanadium (V) loadings. Temperatureprogrammed reduction by hydrogen displayed one reduction peak for VO x /γAl 2 O 3 and two for VO x /ZrO 2 −γAl 2 O 3 (5 and 7.5 wt % vanadium). Temperature-programmed desorption of ammonia (NH 3 -TPD) and pyridine Fourier transform infrared spectroscopy showed that zirconia on γAl 2 O 3 reduces the catalyst acidity. NH 3 -TPD kinetics gave for VO x /ZrO 2 −γAl 2 O 3 higher desorption activation energies than those for VO x /γAl 2 O 3 . PODH runs in the Chemical Reactor Engineering Center Riser Simulator were developed under an oxygen-free atmosphere at 550 °C, close to 1 atm, 20 s, and a 42.0 catalyst/propane weight ratio (g/g). PODH runs for the 7.5% V/ZrO 2 −γAl 2 O 3 showed (a) 93% propylene selectivity and 25% propane conversion (based on propane converted into gaseous carbon-containing products), (b) 85% propylene selectivity at 28% propane conversion (based on propane converted including coke). The CO x selectivity remains at 2%. This makes the 7.5% V/ZrO 2 −γAl 2 O 3 catalyst a promising one for anticipated PODH industrial applications.

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Oxidative dehydrogenation of ethane to ethylene in a system with circulating microspherical metal oxide oxygen carrier: 1. Synthesis and study of the catalytic system

Cited by 20 publications

References 18 publications

Chemical looping beyond combustion – a perspective

Chemical looping beyond combustion – a perspective

Recent Advances in Intensified Ethylene Production—A Review

Propane Oxidative Dehydrogenation Using Consecutive Feed Injections and Fluidizable VO_x/γAl₂O₃ and VO_x/ZrO₂–γAl₂O₃ Catalysts

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Oxidative dehydrogenation of ethane to ethylene in a system with circulating microspherical metal oxide oxygen carrier: 1. Synthesis and study of the catalytic system

Cited by 20 publications

References 18 publications

Chemical looping beyond combustion – a perspective

Chemical looping beyond combustion – a perspective

Recent Advances in Intensified Ethylene Production—A Review

Propane Oxidative Dehydrogenation Using Consecutive Feed Injections and Fluidizable VOx/γAl2O3 and VOx/ZrO2–γAl2O3 Catalysts

Contact Info

Product

Resources

About

Propane Oxidative Dehydrogenation Using Consecutive Feed Injections and Fluidizable VO_x/γAl₂O₃ and VO_x/ZrO₂–γAl₂O₃ Catalysts