Pretreatment effect studies with a precipitated iron Fischer-Tropsch catalyst

Bukur, Dragomir B.; Koranne, M.; Lang, Xiaosu; Rao, K.R.P.M.; Huffman, G.P.

doi:10.1016/0926-860x(95)00020-8

Cited by 92 publications

(61 citation statements)

References 46 publications

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“…This is consistent with results obtained previously in our laboratory, with other iron Fischer-Tropsch catalysts (Bukur et al 1989;1995a), which showed that the use of more severe reduction conditions often results in higher gaseous hydrocarbon selectivities.…”

Section: Vi-22supporting

confidence: 82%

“…This demonstrates that the use of more severe reduction conditions does not necessarily result in higher activity. Previous studies in our laboratory with iron based catalysts without silicon oxide ( Bukur et al 1989;1995a), have shown that the use of more severe reduction conditions may result in low catalyst activity. Catalyst activity in run SA-1665 was nearly constant up to 400 h on stream, whereas catalysts in runs SB-3425 and SA-0376 started to deactivate after about 100 h and 260 h on stream, respectively.…”

Section: Vi-21mentioning

confidence: 99%

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Development of Precipitated Iron Fischer-Tropsch Catalysts

Bukur¹,

Lang²,

Chokkaram³

et al. 1999

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Section: Vi-22supporting

confidence: 82%

Section: Vi-21mentioning

confidence: 99%

Development of Precipitated Iron Fischer-Tropsch Catalysts

Bukur¹,

Lang²,

Chokkaram³

et al. 1999

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“…Aside from the theoretical prediction that e-Fe 2 C is the thermodynamically most stable iron carbide among the TPand O-carbides at low temperature 25 , it has been reported that iron catalysts with smaller particles are desirably more resistant to oxidation by CO 2 and water produced during FTS 6 , which may be the physical origin of the high robustness of the RQ Fe catalyst constituted by nanocrystalline e-Fe 2 C. We are uncertain at present whether e-Fe 2 C is inherently more resistant to oxidation, although ref. 52 found that e 0 -Fe 2.2 C, another O-carbide, appears to be less susceptible to oxidizing conditions than w-Fe 5 C 2 . Nevertheless, the possible inhibition of water on the LTFTS activity of e-Fe 2 C due to water accumulation at longer reaction times requires further exploration in a continuous-flow reactor.…”

Section: Article Nature Communications | Doimentioning

confidence: 99%

ε-Iron carbide as a low-temperature Fischer–Tropsch synthesis catalyst

et al. 2014

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e-Iron carbide has been predicted to be promising for low-temperature Fischer-Tropsch synthesis (LTFTS) targeting liquid fuel production. However, directional carbidation of metallic iron to e-iron carbide is challenging due to kinetic hindrance. Here we show how rapidly quenched skeletal iron featuring nanocrystalline dimensions, low coordination number and an expanded lattice may solve this problem. We find that the carbidation of rapidly quenched skeletal iron occurs readily in situ during LTFTS at 423-473 K, giving an e-iron carbidedominant catalyst that exhibits superior activity to literature iron and cobalt catalysts, and comparable to more expensive noble ruthenium catalyst, coupled with high selectivity to liquid fuels and robustness without the aid of electronic or structural promoters. This finding may permit the development of an advanced energy-efficient and clean fuel-oriented FTS process on the basis of a cost-effective iron catalyst.

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“…Texas A&M [54] has done Fischer-Tropsch catalyst development with emphasis on the effect of pretreatment procedures, promoters and binders. The work was done using irodsiica catalysts.…”

Section: -12mentioning

confidence: 99%