Kinetic and autocatalytic effects during the hydrogen production by methane decomposition over carbonaceous catalysts

Serrano, David; Botas, Juan A.; Pizarro, Patricia; Gómez, Gabriel J. García

doi:10.1016/j.ijhydene.2013.02.112

Cited by 55 publications

(42 citation statements)

References 36 publications

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“…Regarding to the catalytic sites involved in the reaction, although the carbonaceous materials has been also used in the methane decomposition (Suelves et al, 2008;Serrano et al, 2013), its intrinsic activity is quite less than that of Ni. In consequence, it has not been included in the model, in order to not increase the number of kinetic parameters to calculate.…”

Section: Kinetics and Mechanism Of Carbonaceous Nanomaterials Growthmentioning

confidence: 99%

Use of Ni Catalysts Supported on Biomorphic Carbon Derived From Lignocellulosic Biomass Residues in the Decomposition of Methane

et al. 2019

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In this work, we present the results of production of carbonaceous nanomaterials by decomposition of methane on a catalyst of Ni supported on a Biomorphic Carbon. The catalyst was prepared by thermal decomposition in a reductive atmosphere of vine shoots previously impregnated with the Ni precursor. In order to optimize the reaction productivity and selectivity, the effect of the main operational conditions (reaction temperature and feed composition) has been studied in a thermobalance. The main textural properties, BET area of 63 m 2 /g and 56% of microporosity, of the catalyst synthesized indicates that these materials are suitable for gas-phase reactions even in harsh conditions. Thus, the catalyst has proved to be active in the synthesis of carbon nanofibers and graphene related materials at elevated temperatures. The productivity, type, and quality of the carbonaceous nanomaterials obtained are deeply dependent on the operating conditions during the reaction. As an important fact, is has been obtained that the reaction temperature strongly affects the type of the nanomaterial produced. Thus, it is produced CNFs of bamboo type at temperatures until 850 • C. Above this critical temperature, it is mainly obtained nanolayers of graphitic nature. The characterization results indicate that the highest quality graphenic materials were obtained operating at 950 • C with 14.3% of CH 4 and 14.3% of H 2. The kinetic model used to analyze the experimental data is based on the more relevant stages of the mechanism of reaction.

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Section: Kinetics and Mechanism Of Carbonaceous Nanomaterials Growthmentioning

confidence: 99%

Use of Ni Catalysts Supported on Biomorphic Carbon Derived From Lignocellulosic Biomass Residues in the Decomposition of Methane

et al. 2019

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“…Botas and co-workers have used a new class of carbonaceous materials (CMK-3 and CMK-5), which have an ordered mesoporous structure. 187,188 Their results showed that CMK-5 is an active catalyst for hydrogen production with a high stability.…”

Section: The Catalytic Production Of Hydrogenmentioning

confidence: 99%

Mesoporous materials for clean energy technologies

et al. 2014

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Alternative energy technologies are greatly hindered by significant limitations in materials science. From low activity to poor stability, and from mineral scarcity to high cost, the current materials are not able to cope with the significant challenges of clean energy technologies. However, recent advances in the preparation of nanomaterials, porous solids, and nanostructured solids are providing hope in the race for a better, cleaner energy production. The present contribution critically reviews the development and role of mesoporosity in a wide range of technologies, as this provides for critical improvements in accessibility, the dispersion of the active phase and a higher surface area. Relevant examples of the development of mesoporosity by a wide range of techniques are provided, including the preparation of hierarchical structures with pore systems in different scale ranges. Mesoporosity plays a significant role in catalysis, especially in the most challenging processes where bulky molecules, like those obtained from biomass or highly unreactive species, such as CO2 should be transformed into most valuable products. Furthermore, mesoporous materials also play a significant role as electrodes in fuel and solar cells and in thermoelectric devices, technologies which are benefiting from improved accessibility and a better dispersion of materials with controlled porosity.

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“…The high initial activity of mesoporous activated carbons can be linked to the high density of C‐graphene defects , . In fact, a linear correlation between the initial activity and the amount of defects on the graphene layers has been reported in several works , .…”

Section: Catalytic Methane Pyrolysismentioning

confidence: 98%

“…Transition metals like Ni, Fe, and Co have been widely studied as active species for methane pyrolysis [20,29,[57][58][59][60][61] due to their high activity, moderate operating temperature, and the possibility of producing valuable carbon nanotubes as by-product [62]. Their 3d orbitals are partially filled and can accept electrons from the C-H bonds of methane, which facilitates its decomposition [20,29,[57][58][59][60][61]63].…”

Section: Metal Catalystsmentioning

confidence: 99%

“…A high number of HES usually means a low carbon crystallite size, and it is generally accepted that they determine the initial activity of carbons in methane decomposition. HES are considered the main fraction of active sites in carbon catalysts since methane can interact with the chemically reactive edges of carbon crystallites, giving rise to its dissociation into carbon and hydrogen , , . Disordered forms of carbon with a high defect concentration (activated carbon, carbon black) have been reported to be catalytically more active than ordered structures (graphite, diamond powder) , , , .…”

Section: Catalytic Methane Pyrolysismentioning

confidence: 99%

See 1 more Smart Citation

Methane Pyrolysis for CO₂‐Free H₂ Production: A Green Process to Overcome Renewable Energies Unsteadiness

Sanchez‐Bastardo

Schlögl

Ruland

2020

Chemie Ingenieur Technik

146

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The Carbon2Chem® project aims to convert exhaust gases from the steel industry into chemicals such as methanol to reduce CO2 emissions. Here, H2 is required for the conversion of CO2 into methanol. Although much effort is put to produce H2 from renewables, the use of fossil fuels, especially natural gas, seems to be fundamental in the short term. For this reason, the development of clean technologies for the processing of natural gas with a low environmental impact has become a topic of utmost importance. In this context, methane pyrolysis has received special attention to produce CO2‐free H2.

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Kinetic and autocatalytic effects during the hydrogen production by methane decomposition over carbonaceous catalysts

Cited by 55 publications

References 36 publications

Use of Ni Catalysts Supported on Biomorphic Carbon Derived From Lignocellulosic Biomass Residues in the Decomposition of Methane

Use of Ni Catalysts Supported on Biomorphic Carbon Derived From Lignocellulosic Biomass Residues in the Decomposition of Methane

Mesoporous materials for clean energy technologies

Methane Pyrolysis for CO₂‐Free H₂ Production: A Green Process to Overcome Renewable Energies Unsteadiness

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Kinetic and autocatalytic effects during the hydrogen production by methane decomposition over carbonaceous catalysts

Cited by 55 publications

References 36 publications

Use of Ni Catalysts Supported on Biomorphic Carbon Derived From Lignocellulosic Biomass Residues in the Decomposition of Methane

Use of Ni Catalysts Supported on Biomorphic Carbon Derived From Lignocellulosic Biomass Residues in the Decomposition of Methane

Mesoporous materials for clean energy technologies

Methane Pyrolysis for CO2‐Free H2 Production: A Green Process to Overcome Renewable Energies Unsteadiness

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Methane Pyrolysis for CO₂‐Free H₂ Production: A Green Process to Overcome Renewable Energies Unsteadiness