Preparation of Carbon-Supported K-Fe-Mn and Fe-Mn Catalysts Using Carbonyl Clusters

Venter, Jeremy J.; Kaminsky, Mark; Geoffroy, Gregory L.; Vannice, M. A.

doi:10.1016/s0167-2991(08)65430-0

Cited by 23 publications

(39 citation statements)

References 15 publications

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“…Extensive efforts have been made, mostly involving modification of Fischer-Tropsch synthesis (FTS) catalysts in order to modulate the products towards light olefins since typical FTS products follow ASF (Anderson-Schulz-Flory) distribution, which includes large amounts of saturated alkanes and long chain hydrocarbons. Among a variety of catalysts investigated, iron-based FTS catalysts appear to be more promising because of a relatively higher olefin selectivity with a lower methane selectivity [1][2][3][4][5][6][7]. However, the still low selectivity and yield to the desired light alkenes, and low stability of iron catalysts against oxidation under reaction conditions restricts their commercial application at an industrial scale.…”

Section: Introductionmentioning

confidence: 99%

FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

et al. 2012

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Section: Introductionmentioning

confidence: 99%

FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

et al. 2012

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“…As a conventional promoter, manganese has been widely used in many catalysts for Fischer-Tropsch synthesis (FTS) [3][4][5][6], and most researchers agreed that the addition of manganese could modify the iron catalysts to improve the selectivity of light alkenes in the products [7][8][9][10]. In our previous work [9], the promotion effect of manganese on the selectivity to light alkenes has been studied over impregnated iron catalysts supported on silicate-2, and it was found that the manganese could prohibit the secondary hydrogenation of C 2 H 4 and C 3 H 6 .…”

Section: Introductionmentioning

confidence: 99%

CO Hydrogenation to Light Alkenes Over Mn/Fe Catalysts Prepared by Coprecipitation and Sol-gel Methods

Wang

Sun

et al. 2005

Catal Lett

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CO hydrogenation to light alkenes was carried out on manganese promoted iron catalysts prepared by coprecipitation and sol-gel techniques. Addition of manganese in the range of 1-4 mol.% by means of coprecipitation could improve notably the percentage of C 2 = $C 4 = in the products, but it was not so efficient when the sol-gel method was employed. XRD and H 2 -TPR measurements showed that the catalyst samples giving high C 2 = $C 4 = yields possessed ultrafine particles in the form of pure a-(Fe 1-x Mn x ) 2 O 3 , and high quality in lowering the reduction temperature of the iron oxide. Furthermore, these samples displayed deep extent of carburization and different surface procedures to the others in the tests of Temperature Programmed Surface Carburization (TPSC). The different surface procedures of these samples were considered to have close relationship with the evolving of surface oxygen. It was also suggested that for the catalysts with high C 2 = $C 4 = yields, the turnover rate of the active site could be kept at a relatively high level due to the improved reducing and carburizing capabilities. Consequently, there would be a large number of sites for CO adsorption/dissociation and an enhanced carburization environment on the catalyst surface, so that the process of hydrogenation could be suppressed relatively to a low level. As a result, the percentage of the light alkenes in the products could be raised.

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“…Earlier studies indicate that the Strong Metal Support Interaction (SMSI) between iron and supports could greatly influence the catalyst activity and tune the products away from ASF distribution [3,4]. For example, carbon materials as the support for iron were found to favor synthesis of light olefins from syngas [5,6].…”

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confidence: 99%

Direct production of light olefins from syngas over a carbon nanotube confined iron catalyst

2010

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Iron particles confined in carbon nanotube (CNT) channels have been used as a catalyst for the direct conversion of syngas to light olefins. Compared with iron catalysts supported on other materials such as Silica-1, SBA-15 and carbon black, the CNT-confined catalyst exhibits a higher CO conversion and selectivity to the light olefins. This can be attributed to the CNT channels, which provide a unique confinement environment for iron particles. carbon nanotubes, iron, syngas, light olefinsCitation:Wang C F, Pan X L, Bao X H. Direct production of light olefins from syngas over a carbon nanotube confined iron catalyst.

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Preparation of Carbon-Supported K-Fe-Mn and Fe-Mn Catalysts Using Carbonyl Clusters

Cited by 23 publications

References 15 publications

FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

CO Hydrogenation to Light Alkenes Over Mn/Fe Catalysts Prepared by Coprecipitation and Sol-gel Methods

Direct production of light olefins from syngas over a carbon nanotube confined iron catalyst

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