Effect of hydrogen combustion reaction on the dehydrogenation of ethane in a fixed-bed catalytic membrane reactor

Hasany, Masoud; Malakootikhah, Mohammad; Rahmanian, Vahid; Yaghmaei, Soheila

doi:10.1016/j.cjche.2015.05.006

Cited by 16 publications

(8 citation statements)

References 19 publications

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“…Then, the samples were saturated with NH 3 at 100 °C in the flow of 5% NH 3 /He (15 cm 3 /min) for 30 min. Before the NH 3 -TPD experiment, weakly adsorbed NH 3 was removed by flowing He (25 cm 3 / min) at 100 °C for 30 min. Then ammonia was desorbed from 100 to 450 °C using a linear heating rate for 10 °C/min.…”

Section: Methodsmentioning

confidence: 99%

“…2 Moreover, separation and purification make the process of steam cracking more expensive. 3 Although steam cracking and fluid catalytic cracking processes are industrially used, there are intensively studied new alternatives, such as oxidative dehydrogenation (ODH). ODH is an exothermic reaction (steam cracking and nonoxidative dehydrogenation are endothermic reactions) and does not suffer from the coke deposition as the dehydrogenation reaction does.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al₂O₃ and Ni–Ce/Al₂O₃ Catalysts in Oxidative Dehydrogenation of Ethane

Smoláková

Kout

Koudelková

et al. 2015

Ind. Eng. Chem. Res.

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We studied the effect of calcination temperature of Ni/Al 2 O 3 and Ni−Ce/Al 2 O 3 catalysts on the specific surface area, acidity, ratio of pore volume and specific surface area, reducibility reflecting the changing population of Ni(T d ) and Ni(O h ) species, and activity/selectivity in oxidative dehydrogenation of ethane. It should be stressed that the role of Ce as a promoter on the catalytic activity of Ni−Ce/Al 2 O 3 catalysts decreased with an increasing value of the calcination temperature. At a reaction temperature of 500°C, the highest productivity to ethene was observed for the Ni−Ce/Al 2 O 3 catalyst calcined at 500°C. Ni− Ce/Al 2 O 3 catalysts calcined at 500−750°C showed the same selectivity to ethene. The Ni−Ce/Al 2 O 3 catalysts calcined at 900 and 1000°C showed a sharp decrease in the selectivity and the activity, which was probably associated with the formation of NiAl 2 O 4 spinel.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al₂O₃ and Ni–Ce/Al₂O₃ Catalysts in Oxidative Dehydrogenation of Ethane

Smoláková

Kout

Koudelková

et al. 2015

Ind. Eng. Chem. Res.

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“…The expressions for kinetic rate constant and equilibrium constants have been studied in the literature. , where the rate constant ( k 0 ) and the activation energy ( E ) for the system are 4.23 × 10 –3 mol m –2 s –1 Pa –1 and 20.6 kcal mol –1 and where R is the gas constant. ,,− …”

Section: Methodsmentioning

confidence: 99%

Effect of Pressure on Ethane Dehydrogenation in MFI Zeolite Membrane Reactor

et al. 2018

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Using a membrane reactor (MR) for producing ethylene by ethane dehydrogenation (EDH) reaction is an effective process. Compared with packed bed reactors (PBR), the EDH MR effectively surpasses the equilibrium limit by timely removing H2. A packed bed membrane reactor (PBMR) with a Pt/Al2O3 catalyst was used to investigate the effect of pressure on the EDH reaction. The EDH reaction was performed in the PBMR for the pressure and temperature range of 1–5 atm and 500–600 °C, respectively. With an increase in reaction temperature, the reaction rate increased which caused higher ethane conversion. Increasing the reaction pressure helped in enhancing H2 permeation across the membrane, which significantly increased the ethane conversion. The equilibrium limit of ethane conversion was successfully surpassed by increasing temperature and reaction pressure in the PBMR. Ethane conversion and ethylene selectivity as high as 29% and 97% were obtained at 600 °C and 5 atm for PBMR while corresponding values were 7% and 75% for PBR. The timely removal of H2 from the reaction side also helped in reducing methane formation as H2 is required for the methanation to occur. In addition, a 1D plug flow model was developed, and the values for ethane conversion obtained from the model were validated with experimental results. The same model was used to evaluate the ethane conversion beyond the experimental conditions, showing ethane conversion >90% could be obtained.

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“…Shifting the equilibrium limit by continuous hydrogen removal was reported for the dehydrogenation of ethanol with a Pd−Ru alloy Li 1.1 Zr 1.9 In 0.1 (PO 4 ) 3 CM . Modelling ethane dehydrogenation with a Pd−Ag membrane indicated that reduced energy costs and enhanced reaction yields would be possible . Indeed, a Pt/Al 2 O 3 catalyst deposited on modernite membrane disks was used for the dehydrogenation of ethane and the yield of ethylene was enhanced by up to 17 % compared with the equilibrium yields .…”

Section: Catalytic Membranes (Cms)mentioning

confidence: 99%

Catalytic Ionic‐Liquid Membranes: The Convergence of Ionic‐Liquid Catalysis and Ionic‐Liquid Membrane Separation Technologies

et al. 2017

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Membrane technologies enable the facile separation of complex mixtures of gases, vapours, liquids and/or solids under mild conditions. Simultaneous chemical transformations can also be achieved in membranes by using catalytically active membrane materials or embedded catalysts, in so‐called membrane reactors. A particular class of membranes containing or composed of ionic liquids (ILs) or polymeric ionic liquids (pILs) have recently emerged. These membranes often exhibit superior transport and separation properties to those of classical polymeric membranes. ILs and pILs have also been extensively studied as separation solvents, catalysts and co‐catalysts in similar applications for which membranes are employed. In this review, after introducing ILs and their applications in catalysis, catalytic membranes and recent advances in membrane separation processes based on ILs are described. Finally, the nascent concept of catalytic IL membranes is highlighted, in which catalytically active ILs/pILs are incorporated into membrane technologies to act as a catalytic separation layer.

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Effect of hydrogen combustion reaction on the dehydrogenation of ethane in a fixed-bed catalytic membrane reactor

Cited by 16 publications

References 19 publications

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al₂O₃ and Ni–Ce/Al₂O₃ Catalysts in Oxidative Dehydrogenation of Ethane

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al₂O₃ and Ni–Ce/Al₂O₃ Catalysts in Oxidative Dehydrogenation of Ethane

Effect of Pressure on Ethane Dehydrogenation in MFI Zeolite Membrane Reactor

Catalytic Ionic‐Liquid Membranes: The Convergence of Ionic‐Liquid Catalysis and Ionic‐Liquid Membrane Separation Technologies

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Effect of hydrogen combustion reaction on the dehydrogenation of ethane in a fixed-bed catalytic membrane reactor

Cited by 16 publications

References 19 publications

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al2O3 and Ni–Ce/Al2O3 Catalysts in Oxidative Dehydrogenation of Ethane

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al2O3 and Ni–Ce/Al2O3 Catalysts in Oxidative Dehydrogenation of Ethane

Effect of Pressure on Ethane Dehydrogenation in MFI Zeolite Membrane Reactor

Catalytic Ionic‐Liquid Membranes: The Convergence of Ionic‐Liquid Catalysis and Ionic‐Liquid Membrane Separation Technologies

Contact Info

Product

Resources

About

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al₂O₃ and Ni–Ce/Al₂O₃ Catalysts in Oxidative Dehydrogenation of Ethane

Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al₂O₃ and Ni–Ce/Al₂O₃ Catalysts in Oxidative Dehydrogenation of Ethane