An Efficient Catalyst for Light Olefins Production from CO Hydrogenation: Synergistic Effect of Zn and Ce Promoters on Performance of Co–Mn/SiO2 Catalyst

Zafari, Raheleh; Abdouss, Majid; Zamani, Yahya; Tavasoli, Ahmad

doi:10.1007/s10562-017-2152-z

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…This added value effect has been observed in various catalytic systems [11,[15][16][17][18][19][20][21]. For example, the co-action of Cu and K in the iron catalyst used for the CO 2 hydrogenation process [15], Na and S in the Fe-based catalyst used for Fischer-Tropsch synthesis [16,17] or Zn and Ce in a bimetallic Co-Mn system for CO hydrogenation [18]. However, it is sometimes difficult to understand the interaction between individual promoters or promoters and metal in the active phase and to explain the synergistic effect.…”

Section: Of 17mentioning

confidence: 69%

“…When it occurs, the catalytic properties of a system promoted with at least two compounds are much more favourable than would result from the properties of the sum of each individually promoted system component. This added value effect has been observed in various catalytic systems [11,[15][16][17][18][19][20][21]. For example, the co-action of Cu and K in the iron catalyst used for the CO 2 hydrogenation process [15], Na and S in the Fe-based catalyst used for Fischer-Tropsch synthesis [16,17] or Zn and Ce in a bimetallic Co-Mn system for CO hydrogenation [18].…”

Section: Of 17mentioning

confidence: 90%

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Synergistic Interaction of Cerium and Barium-New Insight into the Promotion Effect in Cobalt Systems for Ammonia Synthesis

et al. 2020

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This study explains a co-promoting interaction of cerium and barium additives in a cobalt catalyst used for ammonia synthesis. The results show that a synergistic effect of Ce and Ba promoters in the catalyst is associated with an emergence of a third promoter—BaCeO3—which forms in situ from its individual components during catalyst activation. The influence of perovskite-type barium cerate is substantial due to its strong basic properties, i.e. high electron-donating ability and a tendency to stabilize the Co hcp cobalt phase (more active in ammonia synthesis than the Co fcc phase). BaCeO3 diversifies the structure of adsorption sites on the cobalt surface by contributing to the exposure of facets with more favourable adsorption and binding energies with regards to rate-limiting reactions steps. It allows to a more fluent formation and transfer of species unrestricted by the hydrogen or product poisoning consequently accelerating the entire ammonia synthesis process.

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Section: Of 17mentioning

confidence: 69%

Section: Of 17mentioning

confidence: 90%

Synergistic Interaction of Cerium and Barium-New Insight into the Promotion Effect in Cobalt Systems for Ammonia Synthesis

et al. 2020

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“…The characterization results are given in Table . The degree of reduction is calculated by Equation , which is defined as the ratio of hydrogen consumption of metal oxides to the amount of hydrogen consumption in the complete reduction process

DR (() %) = \frac{Total H_{2} consumption ((), mmol / normalg cat .)}{Total H_{2} for complete reduction of catalyst ((), mmol / normalg cat .)},

…”

Section: Resultsmentioning

confidence: 99%

“…The degree of reduction is calculated by Equation (4), which is defined as the ratio of hydrogen consumption of metal oxides to the amount of hydrogen consumption in the complete reduction process. [24] F I G U R E 1 XRD pattern of prepared catalyst T A B L E 1…”

Section: H 2 -Tprmentioning

confidence: 99%

Profound synergetic effect of metal oxide promoters and TiO₂–SiO₂ binary support in cobalt Fischer‐Tropsch catalyst

Yaghoobpour¹,

Zamani²,

Zarrinpashne³

et al. 2019

J Chinese Chemical Soc

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A series of cobalt catalysts supported on TiO 2 , SiO 2 , or a mixture of them, incorporated with some added oxides from Groups III, IV, and V of transition metals, were prepared using the incipient wetness impregnation method. For better evaluation of catalysts, the physicochemical properties of catalysts were investigated using brunauer-emmett-teller (BET), H 2 -TPR, NH 3 -TPD, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy techniques. The performance of catalysts was studied in a fixed-bed reactor at 220 C, 24 bar, gas hourly space velocity (GHSV) of 2 L/h/gcat., and H 2 to CO ratio of 2. The results indicate that CeO 2 and ZrO 2 as promoters can enhance the CO conversion and catalyst activity and enhance the selectivities of higher-molecular-weight products. On the contrary, the presence of V 2 O 5 as a promoter undesirably suppressed CO conversion and, consequently, catalytic performance. The results show that the catalyst included CeO 2 , was supported on a binary mixture of SiO 2 and TiO 2 , and has significant improved activity and C 5 + selectivity. From the reactor test, values of 156.48 mmol COconv./gCo/h activity, and 0.17 gC 3 + / (h.gcat.) productivity have been obtained for this catalyst. K E Y W O R D S binary support,

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Effect of Mn and reduced graphene oxide for the Fischer–Tropsch reaction: an efficient catalyst for the production of light olefins from syngas

Zafari

Abdouss

Zamani

2020

Reac Kinet Mech Cat

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An Efficient Catalyst for Light Olefins Production from CO Hydrogenation: Synergistic Effect of Zn and Ce Promoters on Performance of Co–Mn/SiO2 Catalyst

Cited by 9 publications

References 32 publications

Synergistic Interaction of Cerium and Barium-New Insight into the Promotion Effect in Cobalt Systems for Ammonia Synthesis

Synergistic Interaction of Cerium and Barium-New Insight into the Promotion Effect in Cobalt Systems for Ammonia Synthesis

Profound synergetic effect of metal oxide promoters and TiO₂–SiO₂ binary support in cobalt Fischer‐Tropsch catalyst

Effect of Mn and reduced graphene oxide for the Fischer–Tropsch reaction: an efficient catalyst for the production of light olefins from syngas

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An Efficient Catalyst for Light Olefins Production from CO Hydrogenation: Synergistic Effect of Zn and Ce Promoters on Performance of Co–Mn/SiO2 Catalyst

Cited by 9 publications

References 32 publications

Synergistic Interaction of Cerium and Barium-New Insight into the Promotion Effect in Cobalt Systems for Ammonia Synthesis

Synergistic Interaction of Cerium and Barium-New Insight into the Promotion Effect in Cobalt Systems for Ammonia Synthesis

Profound synergetic effect of metal oxide promoters and TiO2–SiO2 binary support in cobalt Fischer‐Tropsch catalyst

Effect of Mn and reduced graphene oxide for the Fischer–Tropsch reaction: an efficient catalyst for the production of light olefins from syngas

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Profound synergetic effect of metal oxide promoters and TiO₂–SiO₂ binary support in cobalt Fischer‐Tropsch catalyst