CNT-based catalysts for H2 production by ethanol reforming

Seelam, Prem Kumar; Huuhtanen, Mika; Sápi, András; Szabó, Mária; Kordás, Krisztián; Turpeinen, Esa; Tóth, Géza; Keiski, Riitta L.

doi:10.1016/j.ijhydene.2010.07.160

Cited by 42 publications

(17 citation statements)

References 35 publications

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“…Carbon nanotubes (CNTs) are a unique form of carbon due to their intrinsic properties such as extraordinary mechanical, electric, thermal stability and chemical inertness [19,20]. Therefore, production of higher quality CNTs at lower cost is of great importance.…”

Section: Introductionmentioning

confidence: 99%

Influence of metal addition to Ni-based catalysts for the co-production of carbon nanotubes and hydrogen from the thermal processing of waste polypropylene

Nahil

Williams

2015

Fuel Processing Technology

103

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ABSTRACT:This paper investigates the co-production of hydrogen and carbon nanotubes from the pyrolysis-catalytic gasification of waste plastics (polypropylene). We report on the influence of a range of metal additions to a nickel based catalyst based on ternary mixed oxides types catalyst support plays a significant role in the gasification process; weak metal support interaction (for the Ni-Mn-Al catalyst calcined at 300 °C) resulted in a lower hydrogen production and much higher yield of carbon products. In addition, the influence of steam injection rate on hydrogen and carbon nanotube production was investigated for the Ni-MnAl catalyst. Increasing the steam injection rate significantly increased hydrogen production and decreased carbon deposition. However, at lower steam injection rates, the quality of the product carbon nanotubes was improved.

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Section: Introductionmentioning

confidence: 99%

Influence of metal addition to Ni-based catalysts for the co-production of carbon nanotubes and hydrogen from the thermal processing of waste polypropylene

Nahil

Williams

2015

Fuel Processing Technology

103

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“…As mentioned in the ESR reaction of Fig. 8, if an ethanol molecule is decomposed through a CH 3 CHO intermediate, the coke comprising the carbon lump is generated in the following order: CH 3 CHO / CH 4 þ CO / CO / C. On the other hand, if ethylene is produced as an intermediate and it reacts with hydrogen at high temperatures, and it is transformed easily to CNF over the transition metal ingredients, such as metallic Co [46]. In the 30Co/70SBA-15 or 30Co 2 V 1 /70SBA-15 catalysts, carbon lumps were mainly generated, whereas CNFs were produced predominantly in 30Co 1 V 1 /70SBA-15 compared to carbon lumps through the following process: CH 3 CHO / CH 4 / C 2 H 4 / CNF, which was observed as a sharp curve in TPO in Fig.…”

Section: Characteristics Of the Used Catalysts After Ethanol Reformingmentioning

confidence: 98%

Hydrogen generation over 30CoxVy/70SBA-15 mesoporous materials well-balanced by Co and V co-doping

Lee

Kwak

Park

et al. 2015

International Journal of Hydrogen Energy

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“…The total gas ow rate of the reactants and the carrier gas was 600 mL min À1 corresponding to $30 mL min À1 ethanol and $90 mL min À1 of water as reactants, and 480 mL min À1 N 2 as balancing gas (at 180 C). 11,20 The selectivity of hydrogen (S H 2 ) was calculated with the following equation: 11…”

Section: Catalyst Preparation Characterization and Activity Testmentioning

confidence: 99%

“…Furthermore, carbon nanotubes are rather inert in chemical reactions and can be easily grown on templates to form scaffolds and hierarchical structures with engineered pore systems. 11,16,17 Carbonaceous supports, however, are more sensitive to heat than metal oxides and may face deactivation due to catalytic oxidation and gasication at relatively low temperatures. 18 The aim of this work is to study and explain the differences in the activity and stability of commonly used Pt, Pd and Ni catalyst metals supported on different carbon based materials in the steam reforming of ethanol at low to moderate temperatures.…”

Section: Introductionmentioning

confidence: 99%

Carbon supported catalysts in low temperature steam reforming of ethanol: study of catalyst performance

et al. 2015

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Three different metals (Pt, Pd and Ni) on multi-walled carbon nanotube and graphite supports were tested as catalysts in ethanol reforming experiments at low temperatures. The carbon nanotube based catalysts outperformed their counterparts supported on graphite in both ethanol conversion and hydrogen evolution. The palladium catalyst in both supports was rather inactive, whereas the nickel/nickel oxide catalyst showed excellent performance. The most active catalyst (Ni/CNT) showed ethanol conversion and hydrogen evolution already at 200 C with complete conversion at 450 C. The measured selectivity for H 2 production was $42% with almost 100% conversion.Analysis of the spent catalyst samples revealed a considerable increase in carbon concentration caused by the formation of soot and coke on each sample but also carbon nanofibers and nanotubes were found to grow on the catalyst nanoparticles in the course of the steam reforming reactions.

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CNT-based catalysts for H2 production by ethanol reforming

Cited by 42 publications

References 35 publications

Influence of metal addition to Ni-based catalysts for the co-production of carbon nanotubes and hydrogen from the thermal processing of waste polypropylene

Influence of metal addition to Ni-based catalysts for the co-production of carbon nanotubes and hydrogen from the thermal processing of waste polypropylene

Hydrogen generation over 30CoxVy/70SBA-15 mesoporous materials well-balanced by Co and V co-doping

Carbon supported catalysts in low temperature steam reforming of ethanol: study of catalyst performance

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