The catalytic activity of KMoCo carbon spheres for higher alcohols synthesis from syngas

Aslam, Waqas; Beltramini, Jorge; Atanda, Luqman; Batalha, Nuno; Schülli, Tobias U.; Konarova, Muxina

doi:10.1016/j.apcata.2020.117803

Cited by 8 publications

(5 citation statements)

References 47 publications

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“…The pressure having a large impact on formation of higher alcohols from syngas, has been intensively studied in the literature. [23,24,32,36,41,42,44,48,52] Space time yield of alcohols increased with increasing pressure from 3 MPa to 5 MPa at 260 °C over CoFe-300 (300 denotes reduction temperature) catalyst. [52] As a comparison an optimum pressure of 5.0 MPa was observed for maximizing selectivity to higher alcohols over KÀ CuFe/CNF catalyst (Figure 16a), [41] while at the same time when increasing the pressure from 3 to 5 MPa, CO 2 and hydrocarbon selectivity Figure 13.…”

Section: Effect Of Pressurementioning

confidence: 99%

“…The pressure having a large impact on formation of higher alcohols from syngas, has been intensively studied in the literature [23,24,32,36,41,42,44,48,52] . Space time yield of alcohols increased with increasing pressure from 3 MPa to 5 MPa at 260 °C over CoFe‐300 (300 denotes reduction temperature) catalyst [52] .…”

Section: Catalyst Activation Thermodynamics and Effect Of The Reactio...mentioning

confidence: 99%

“…Transformation of syngas to higher alcohols is currently under intensive research [2,4,5,23–57] and several reviews have been published rather recently covering the nature of active centers„ [1,54] and more specifically performance of Fe/Co catalysts and Co carbide nanocatalysts [59] . A simplified reaction scheme for syngas transformation over a bifunctional catalyst is shown in Figure 1 [40] .…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Aviation Fuel from Syngas through Higher Alcohols

et al. 2022

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The current review critically summarizes recent developments in transformations of syngas to higher alcohols. Although higher alcohols have found applications as fuel additives, detergents and plastics for a long while, transformation of alcohols to jet fuel has attained recent interest due to an urgent need to develop jet fuels from sustainable sources. Fermentation of lignocellulosic‐based sugars to ethanol as a technology does not compete with the food chain supply being thus a potentially acceptable route if economically viable. An alternative method is to gasify biomass to produce syngas, which can further be transformed to higher alcohols through several pathways. Jet fuel range alkanes are obtained from alcohols via oligomerisation, dehydration and hydrogenation. The highest space time yields of higher alcohols of 0.61 g/(gcath) is obtained over a bimetallic copper‐iron catalyst supported on a hierarchical zeolite at 300 °C and 5 MPa. Furthermore, copper‐cobalt and cobalt‐manganese compositions are promising for the direct synthesis of higher alcohols from syngas, where one of the challenges is to suppress formation of alkanes and CO2 and increase selectivity to higher alcohols. From the mechanistic point of view, it has been proposed to use dual‐site catalysts, where one site promotes hydrogenation, while the other site is required for the chain growth. In addition to selection of the optimum reaction conditions and catalyst properties, kinetic modelling, thermodynamics and scale up issues are discussed.

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Section: Effect Of Pressurementioning

confidence: 99%

Section: Catalyst Activation Thermodynamics and Effect Of The Reactio...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sustainable Aviation Fuel from Syngas through Higher Alcohols

et al. 2022

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“…Compared to bioethanol, long-chain alcohols offer high value as fine chemicals for plasticizers, surfactants, and pharmaceutical intermediates, 7 and due to their longer carbon chains, they contribute to higher cetane numbers, higher energy densities, nonhygroscopicity, better mixing stability, and compressed ignition qualities. 8,9 Therefore, these advantages of long-chain alcohols make it of great significance to upgrade ethanol to long-chain alcohols. 10 Guerbet coupling is a promising method for the preparation of long-chain alcohols, the key steps of which include alcohol acetal and hydrogen transfer.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, energy sustainability and environmental concerns caused by the burning of fossil fuels have prompted us to seek alternative clean energy sources. − Bioethanol, produced by fermentation of sugars extracted from biomass, is used as an additive or potential substitute for gasoline and is economically viable and widely used. − However, ethanol has inherent properties such as low value, strong hygroscopicity, low energy density, low lubricity, and high autoignition temperature, so its value-add application is greatly limited. Compared to bioethanol, long-chain alcohols offer high value as fine chemicals for plasticizers, surfactants, and pharmaceutical intermediates, and due to their longer carbon chains, they contribute to higher cetane numbers, higher energy densities, nonhygroscopicity, better mixing stability, and compressed ignition qualities. , Therefore, these advantages of long-chain alcohols make it of great significance to upgrade ethanol to long-chain alcohols …”

Section: Introductionmentioning

confidence: 99%

Upgrading of Aqueous Ethanol to Long-Chain Alcohols over Immobilized Highly Dispersed Ni–Re Catalyst

Zhang,

Liu,

Jiang

et al. 2024

Ind. Eng. Chem. Res.

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Motivated by the carbon neutrality policy and the demand for value-added bio-based chemicals, it is of great significance and interest to directly upgrade aqueous ethanol to produce long-chain alcohol chemicals and transportation biofuel. In this study, a bimetallic catalyst composed of Re doped Ni@C was prepared by a facile sol–gel method. The bimetal 70-NiRe@C demonstrated higher selectivity toward target long-chain alcohols product and lower selectivity of C1 byproducts than the monomeric metal Ni@C. The addition of Re promotes the dispersion of active Ni on the graphite carrier, contributing to the superior 59.9% ethanol conversion and 45.0% long-chain alcohol yield. This work guides future research into the direct upgrading of water-based bioethanol to the value-added long-chain fine chemicals and biofuels required.

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