2014
DOI: 10.1021/ie402094b
|View full text |Cite
|
Sign up to set email alerts
|

Fischer–Tropsch Synthesis: Kinetics and Water Effect on Methane Formation over 25%Co/γ-Al2O3 Catalyst

Abstract: The kinetics and the effect of indigenous and externally added water on methane formation during Fischer–Tropsch synthesis (FTS) was studied over Co based catalysts using a 1 L continuously stirred tank reactor (CSTR). The water cofeeding study (10% water) was conducted over a 0.27%Ru–25%Co/Al2O3 catalyst at a low CO conversion level of 19% at 220 °C in order to lessen the effect of catalyst aging during the addition of water, while the kinetic experiment was conducted over 25%Co/γ-Al2O3 at the conditions of 2… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

4
47
1
1

Year Published

2015
2015
2023
2023

Publication Types

Select...
9

Relationship

1
8

Authors

Journals

citations
Cited by 52 publications
(53 citation statements)
references
References 63 publications
4
47
1
1
Order By: Relevance
“…The results showed that a higher CH 4 selectivity of the Co catalyst is primarily correspondent to a higher CH 4 rate constant, compared with other lighter HCs' formation (C 2 -C 4 ). This conclusion is consistent with the previous report from the literature [25]. Figure 8 illustrates the trend of changes in CO and H 2 conversion at different methanation reaction rates along the normalized axial dimension.…”
Section: Effect Of Methane Formation Reaction Ratesupporting
confidence: 91%
See 1 more Smart Citation
“…The results showed that a higher CH 4 selectivity of the Co catalyst is primarily correspondent to a higher CH 4 rate constant, compared with other lighter HCs' formation (C 2 -C 4 ). This conclusion is consistent with the previous report from the literature [25]. Figure 8 illustrates the trend of changes in CO and H 2 conversion at different methanation reaction rates along the normalized axial dimension.…”
Section: Effect Of Methane Formation Reaction Ratesupporting
confidence: 91%
“…Jarosch et al [23] developed a model using a similar approach for a Co:Re (21:1) catalyst on ߛ-Al 2 O 3 . Another relevant example is the work done by Ma et al [24,25] that was applied to a 25% Co/Al 2 O 3 catalyst to fit the CH 4 kinetic data. Overall, the kinetic study based on the power-law rate model can be a powerful method to provide some insight into FT synthesis, without the need to represent a complex reaction network.…”
Section: Introductionmentioning
confidence: 99%
“…Considering the effect of water on the reaction rate, both positive and negative effects have been reported. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Most authors have observed a negative effect of H 2 O on the catalyst activity, and have attributed such an effect to the oxidation of the Co 0 active sites to inactive CoO or Co 3 O 4 species, [1][2][3][4][5][6][7][8] and/or to the formation of FTS inactive cobalt-support mixed spinels. 1,9 These latter species are particularly favored in the case of γ-Al 2 O 3 supported catalysts due to the strong interaction of the support with highly dispersed cobalt (SMSI, Strong Metal Support Interaction).…”
Section: Introductionmentioning
confidence: 99%
“…The amount of water formed depends upon the CO conversion, reactor system and the catalyst used. Although cobalt catalyst does not exhibit significantly WGS activity, the effects of water on the performance of cobalt catalysts have been examined in both fixedbed and slurry reactors by many researchers [7,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. In the absence of other substances involved in the case, CoO, Co 3 O 4 and Co(OH) 2 are the main possible forms for the direct oxidation of cobalt metal by water, and thus the involved chemical equations are as follows:…”
Section: Direct Oxidation Of Cobalt Metal By Watermentioning
confidence: 99%