Oxidative Dehydrogenation of Ethane with CO2 over the Fe-Co/Al2O3 Catalyst: Experimental Data Assisted AI Models for Prediction of Ethylene Yield

Povari, Sangeetha; Alam, Shadab; Shylaja, S.; Nakka, Lingaiah; Sumana, C.

doi:10.1021/acs.iecr.2c04002

Cited by 10 publications

(3 citation statements)

References 58 publications

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“…Transition metal oxides exhibit excellent adsorption and catalytic performances because of their unique electronic configuration, and have been studied in a wide range of catalytic reactions, such as hydrogenation, 1,2 oxidation, 3,4 dehydrogenation, 5,6 and reforming. 7,8 The size effect plays a critical role in governing the performance of metal oxide catalysts.…”

Section: Introductionmentioning

confidence: 99%

A generalized strategy for the ultrafast encapsulation of metal oxide nanoclusters into zeolites

Yu,

Wang,

et al. 2024

React. Chem. Eng.

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Section: Introductionmentioning

confidence: 99%

A generalized strategy for the ultrafast encapsulation of metal oxide nanoclusters into zeolites

Yu,

Wang,

et al. 2024

React. Chem. Eng.

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“…The cobalt's ability to act as an oxidant during the oxidation process is due to the presence of oxygen on the surface of the catalyst when oxygen is present in the process [21]. In ODH of ethane, the cobalt has been used either as a supported catalyst to increase stability and selectivity, incorporated as a promoter to improve catalytic performance, or explored in new materials [22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performances of Co/TiO2 Catalysts in the Oxidative Dehydrogenation of Ethane to Ethylene: Effect of CoTiO3 and Co2TiO4 Phases Formation

Mahir¹,

Brik²,

Benzaouak³

et al. 2023

Preprint

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Co/TiO2 catalysts with different cobalt loadings (3.8, 7.5 and 15 wt%) were prepared by impreg-nation method of Co(NO3)2 .6H2O over titania. Samples containing Co(NO3)2 .6H2O and TiO2 in stoichiometric proportions in order to obtain CoTiO3 and Co2 TiO4 phases were also synthesized. The effect of the calcination treatment at two different temperatures, 550 and 1150 °C was investigated. Characterizations by several techniques, such as XRD UV-vis-NIR, DRS, Raman and XPS were carried out. XRD showed the coexistence of three phases: CoTiO3; Co2TiO4 and Co3O4 after calci-nation at 550°C, while the calcination at high temperature (1150°C) leads to single-phase systems (CoTiO3 or Co2TiO4). Diffuse reflection and XPS spectroscopy showed that divalent cobalt occupies octahedral sites in the ilmenite phase and both tetrahedral and octahedral sites in the spinel phase. The catalytic performances of the prepared catalysts, calcined at the two different temperatures, were evaluated in the oxidative dehydrogenation reaction (ODH) of ethane to ethylene. The con-version values were almost comparable for all the samples, calcined at 550 °C, and comparable the ethylene selectivity were recorded, slightly higher only in the case of CoTiO3. The calcination at 1150°C did not modify the overall activity (ethane conversion values around 20%), however, the production of COx becomes more significant. The study examined the influence of the reaction mixture composition, specifically the presence of water, and reveals a slight increase in the yield of ethylene accompanied by a decrease in the overall catalyst activity. This behavior is likely attributed to an increase in the surface concentration of hydroxyl species (OH), resulting in heightened surface acidity.

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“…The cobalt's ability to act as an oxidant during the oxidation process is due to the presence of oxygen on the surface of the catalyst, when oxygen is present in the process [21]. In ODH of ethane, cobalt has been used either as a supported catalyst to increase stability and selectivity, incorporated as a promoter to improve catalytic performance or explored in new materials [22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performances of Co/TiO2 Catalysts in the Oxidative Dehydrogenation of Ethane to Ethylene: Effect of CoTiO3 and Co2TiO4 Phase Formation

et al. 2023

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Co/TiO2 catalysts with different cobalt loadings (3.8, 7.5 and 15 wt%) were prepared by impregnation method of Co(NO3)2 6H2O over titania. Samples containing Co(NO3)2·6H2O and TiO2 in stoichiometric proportions in order to obtain CoTiO3 and Co2 TiO4 phases were also synthesized. The effect of the calcination treatment at two different temperatures, 550 and 1150 °C, was investigated. Characterizations by several techniques, such as XRD, UV–vis–NIR, DRS, Raman and XPS, were carried out. XRD showed the coexistence of three phases: CoTiO3; Co2TiO4 and Co3O4 after calcination at 550 °C, while calcination at high temperature (1150 °C) led to single-phase systems (CoTiO3 or Co2TiO4). Diffuse reflection and XPS spectroscopy showed that divalent cobalt occupies octahedral sites in the ilmenite phase, and both tetrahedral and octahedral sites in the spinel phase. The catalytic performances of the prepared catalysts were evaluated in the oxidative dehydrogenation reaction (ODH) of ethane to ethylene, as a function of the Co content for Co/TiO2 catalysts and as a function of the calcination temperatures for the CoTiO3 and Co2TiO4 phases. Co(7.5)/TiO2 was the most active, although the conversion of ethane decreased in the first 150 min of the reaction, reaching values comparable to those of Co2TiO4 and CoTiO3; however, Co(7.5)/TiO2 was confirmed as having the best selectivity to ethylene in comparison with the bulk phases, CoTiO3 and Co2TiO4. The influence of the reaction mixture composition, specifically the presence of water, at different percentages, was investigated. There is a decrease in the overall ethane conversion and an increase in the ethylene selectivity when the percentage of water increases. This behavior can likely be attributed to an increase in the surface concentration of hydroxyl species (OH), resulting in heightened surface acidity.

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Oxidative Dehydrogenation of Ethane with CO₂ over the Fe-Co/Al₂O₃ Catalyst: Experimental Data Assisted AI Models for Prediction of Ethylene Yield

Cited by 10 publications

References 58 publications

A generalized strategy for the ultrafast encapsulation of metal oxide nanoclusters into zeolites

A generalized strategy for the ultrafast encapsulation of metal oxide nanoclusters into zeolites

Catalytic Performances of Co/TiO2 Catalysts in the Oxidative Dehydrogenation of Ethane to Ethylene: Effect of CoTiO3 and Co2TiO4 Phases Formation

Catalytic Performances of Co/TiO2 Catalysts in the Oxidative Dehydrogenation of Ethane to Ethylene: Effect of CoTiO3 and Co2TiO4 Phase Formation

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