Effects of surface treatment on the bulk chemistry and structure of vapor grown carbon fibers

Darmstadt, Hans; Sümmchen, L.; Ting, Jyh Ming; Roland, Ulf; Kaliaguine, Serge; Roy, Christian

doi:10.1016/s0008-6223(97)00116-4

Cited by 98 publications

(47 citation statements)

References 18 publications

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“…Second, Raman spectroscopy is used to study the chemical nature of the coke as a function of both the type of reactant, and the specific reforming reaction. This type of analysis has been used to characterize coke in reforming reactions on Pt catalysts [20] and other types of carbon on catalytic surfaces [29]. Finally, X-ray photoelectron spectroscopy (XPS) is used to analyze the catalyst surface before and after TPO.…”

Section: Present Studymentioning

confidence: 99%

Characterization of coke deposited on Pt/alumina catalyst during reforming of liquid hydrocarbons

Shamsi

Baltrus

Spivey

2005

Applied Catalysis A: General

128

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Section: Present Studymentioning

confidence: 99%

Characterization of coke deposited on Pt/alumina catalyst during reforming of liquid hydrocarbons

Shamsi

Baltrus

Spivey

2005

Applied Catalysis A: General

128

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“…5). These results suggested that the order of graphitization of deposited carbon decreases with the addition of Gd 2 O 3 [12,25,26]. That is, reactive intermediate carbon species mainly formed on the surface of Gd 2 O 3 -promoted Ni/SiO 2 catalysts.…”

Section: Resultsmentioning

confidence: 89%

Effect of Gd2O3 over Ni/SiO2 on syngas production via methane autothermal reforming

Guo

Hou

Zheng

2010

Reac Kinet Mech Cat

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Gd 2 O 3 -promoted Ni/SiO 2 catalysts exhibited higher activity and selectivity than Ni/SiO 2 in methane autothermal reforming. The results of the temperature-programmed surface reaction of CH 4 indicated that Gd 2 O 3 might enhance anti-carbon deposition properties. The reactivity of surface carbons showed that the presence of Gd 2 O 3 reduced the formation of inactive carbons on Ni/SiO 2 . Raman results suggested that the order of graphitization of deposited carbon decreases with the addition of Gd 2 O 3 .

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“…The band at 1341 cm -1 is attributed to the defect in graphite and is therefore designated as D band. The integrated intensity of the D and G bands (I D , I G ) is generally used to evaluate the structural order of carbon fibers, i.e., a lower value of the ratio of I D /I G indicates a higher degree of structural order [40]. The D band in the spectrum of Fig.…”

Section: Resultsmentioning

confidence: 99%

The Production of Straight Carbon Microfibers by the Cracking of Methane over Co-SBA-15 Catalysts

Gao

Kawi

2007

Catal Lett

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Cobalt incorporated SBA-15 (Co-SBA-15) catalysts were prepared by using hydrothermal synthesis and over which very straight carbon microfibers were made by cracking CH 4 . The influence of Co loading (from 0.5 to 3 wt%) in SBA-15 and cracking temperature on the methane conversion, structures and morphologies of the microfibers was investigated. The highest yield of microfibers was obtained at 800°C over the 2 wt% Co loaded SBA-15 catalyst. After 16 h reaction, the carbon fibers almost stopped further growth. The diameter of the carbon microfibers could be roughly controlled by judiciously adjusting the Co concentration in SBA-15. The carbon microfiber's growth followed a root-growth mechanism. XRD, HRTEM and Raman studies confirmed that the microfibers were graphitic. The microfiber grown over the 0.5 wt% cobalt loaded SBA-15 catalyst had a higher degree of graphitic structural order than that obtained over the 2 wt% cobalt loaded one.

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Effects of surface treatment on the bulk chemistry and structure of vapor grown carbon fibers

Cited by 98 publications

References 18 publications

Characterization of coke deposited on Pt/alumina catalyst during reforming of liquid hydrocarbons

Characterization of coke deposited on Pt/alumina catalyst during reforming of liquid hydrocarbons

Effect of Gd2O3 over Ni/SiO2 on syngas production via methane autothermal reforming

The Production of Straight Carbon Microfibers by the Cracking of Methane over Co-SBA-15 Catalysts

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