Conversion of synthesis gas into alcohols on supported cobalt-molybdenum sulfide catalysts promoted with potassium

Dorokhov, V. S.; Ishutenko, D. I.; Nikul’shin, P. A.; Kotsareva, K. V.; Trusova, E. A.; Bondarenko, T. N.; Елисеев, О. Л.; Лапидус, А. Л.; Rozhdestvenskaya, N. N.; Коган, В. М.

doi:10.1134/s0023158413020043

Cited by 29 publications

(18 citation statements)

References 17 publications

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“…Fig. 6b further supports that single Mo rim sites correlate with production of hydrocarbons, as the selectivity for total hydrocarbons increased with an increase in the percentage of single layers present in the catalysts, as also observed by Dorokhov et al [68]. The MMO-containing catalysts had a significantly lower fraction of single layers, supporting the low selectivity of these catalysts toward hydrocarbons.…”

Section: Resultssupporting

confidence: 85%

“…This hypothesis is supported by the work of Beltrami et al, where they correlated the sulfur loss (anionic vacancies) observed over an unsupported Ni/MoS 2 catalyst to the promotion of higher alcohol formation [64]. It has also been observed in the literature that alkali metal intercalates between the layers of MoS 2 [65][66][67][68][69], which are held together by van der Waals forces, and this weak binding force allows the interlayer gap to increase to accept alkali metal ions.…”

Section: Resultsmentioning

confidence: 59%

“…6b shows that as the number of double layers increased, the C 3+ OH selectivity increases. Dorokhov et al observed a similar trend over K/MoS 2 supported on c-Al 2 O 3 -SiO 2 , where the total alcohol yield increased with an increasing fraction of 2+ layers, with double layers being the dominant domain size [68]. MoKMMO and MoKMMO-C had the highest fraction of double layers with correspondingly higher C 3+ OH selectivity, followed by MoKC-MMO, and MoKC having the lowest C 3+ OH selectivity with lowest fraction of double layers.…”

Section: Resultsmentioning

confidence: 73%

See 2 more Smart Citations

Tuning of higher alcohol selectivity and productivity in CO hydrogenation reactions over K/MoS2 domains supported on mesoporous activated carbon and mixed MgAl oxide

Claure

Chai

Dai

et al. 2015

Journal of Catalysis

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a b s t r a c tHigher alcohol synthesis from syngas is studied over K/MoS 2 domains supported on mesoporous carbon (C), mixed MgAl oxide (MMO), or mixtures thereof. While the carbon support offers high ethanol productivity, the MMO support yields enhanced C 3+ OH selectivity. MoKMMO-C, whereby Mo is initially contained on MMO then ground with carbon, behaves similar to the parent MoKMMO catalyst, as Mo on MMO has limited mobility during reaction. In contrast, on MoKC-MMO, significant Mo migrates from C to MMO during reaction, giving reactivity associated with Mo species on both supports (high C 3+ OH selectivity and productivity). MoS 2 domain structures are correlated with the selectivity of the catalysts (C 3+ OH selectivity $ double MoS 2 layers, total hydrocarbon selectivity $ single MoS 2 layers). This study advances the understanding of the support's effect on structure-reactivity relationships for this family of catalysts and introduces a new catalyst composition with desirable reactivity.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 73%

See 1 more Smart Citation

Tuning of higher alcohol selectivity and productivity in CO hydrogenation reactions over K/MoS2 domains supported on mesoporous activated carbon and mixed MgAl oxide

Claure

Chai

Dai

et al. 2015

Journal of Catalysis

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“…Catalysis occurs mainly on coordinative unsaturated sites (CUS) formed on the edges of (Co/Ni)MoS 2 catalysts . Co and Ni promoter atoms located on the MoS 2 crystallite edges participate in the CUS formation .…”

Section: Introductionmentioning

confidence: 99%

Effect of Promoter Nature on Synthesis Gas Conversion to Alcohols over (K)MeMoS₂/Al₂O₃ Catalysts

et al. 2020

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The influence of the promoter nature and of a modifier in (K)(Me)MoS2/Al2O3 (Me=Fe, Co, Ni) catalysts on the conversion and selectivity of products of synthesis gas conversion to alcohols and jnl oxygenates was investigated. Relationships between promoter nature, hydrocarbon chain length and selectivity in the formed alcohols were established. Electronic structure of a promoter atom in an active site (AS) was found to strongly affect selectivity of alcohol formation. Promotion of the S‐edge by Fe, Co or Ni suppressed hydrogen activation, which resulted in a lower synthesis gas conversion. Promotion of the M‐edge by Fe, Co, or Ni entailed the formation of double vacancies which are active sites of synthesis gas conversion. Potassium affected the oxophilicity of Mo atoms and reduced Co/Ni‐promoted MoS AS. It decreased the probability of C−O bond breaking in the adsorbed intermediate and shifted selectivity from the formation of alkyl towards alkoxide fragments over these catalysts.

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“…Accordingly, several catalytic systems have been used for higher alcohol synthesis (HAS) from syngas . Among them the alkali‐doped molybdenum sulphide catalyst has shown excellent sulphur resistance, high activity for the water gas shift reaction, and attractive commercial aspects for higher alcohol production …”

Section: Introductionmentioning

confidence: 99%

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis

Tavasoli

Kiai

Karimi³

2016

Can J Chem Eng

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A series of nano‐sized alkalized MoS2 catalysts promoted by Ni and Co supported on multi‐walled carbon nanotubes (MWCNTs) were prepared via the reverse microemulsion technique with water to surfactant (W/S) molar ratios (molwater · mol−1surfactant) of 1–12. All prepared catalysts were extensively characterized by ICP, BET, CO chemisorption, XRD, TPR, and TEM techniques. They were assessed in a fixed‐bed micro‐reactor to find their performance in higher alcohol synthesis from syngas. The results were compared with those of the catalyst prepared by the incipient wetness impregnation method with similar elemental composition. The results showed the relationship of catalyst physicochemical properties and performances to preparation method and average metal particle sizes. Calculated average particle sizes for prepared catalysts via microemulsion showed a decreasing trend with a decrease in W/S ratio. It decreased from 17.4 to 5.26 nm for W/S ratios of 12 to 1, respectively. Similarly, the average particle size for prepared catalysts with the impregnation method was 18.78 nm. The nano‐catalyst prepared via microemulsion with W/S of 1 showed the best performance for CO conversion and higher alcohol selectivity of 66.83 and 37.76, respectively. It was concluded that decreased particle sizes increased the active surface area of the Ni and Co promoted alkalized MoS2/MWCNTs catalysts and increased the fraction of metal particles located inside the CNTs, which in turn improved the catalyst performance.

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Conversion of synthesis gas into alcohols on supported cobalt-molybdenum sulfide catalysts promoted with potassium

Cited by 29 publications

References 17 publications

Tuning of higher alcohol selectivity and productivity in CO hydrogenation reactions over K/MoS2 domains supported on mesoporous activated carbon and mixed MgAl oxide

Tuning of higher alcohol selectivity and productivity in CO hydrogenation reactions over K/MoS2 domains supported on mesoporous activated carbon and mixed MgAl oxide

Effect of Promoter Nature on Synthesis Gas Conversion to Alcohols over (K)MeMoS₂/Al₂O₃ Catalysts

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis

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Conversion of synthesis gas into alcohols on supported cobalt-molybdenum sulfide catalysts promoted with potassium

Cited by 29 publications

References 17 publications

Tuning of higher alcohol selectivity and productivity in CO hydrogenation reactions over K/MoS2 domains supported on mesoporous activated carbon and mixed MgAl oxide

Tuning of higher alcohol selectivity and productivity in CO hydrogenation reactions over K/MoS2 domains supported on mesoporous activated carbon and mixed MgAl oxide

Effect of Promoter Nature on Synthesis Gas Conversion to Alcohols over (K)MeMoS2/Al2O3 Catalysts

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS2 catalysts promoted by Ni and Co in higher alcohols synthesis

Contact Info

Product

Resources

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Effect of Promoter Nature on Synthesis Gas Conversion to Alcohols over (K)MeMoS₂/Al₂O₃ Catalysts

Effects of particle size on the catalytic performance of MWCNTs supported alkalized MoS₂ catalysts promoted by Ni and Co in higher alcohols synthesis