Catalytic decomposition of methane over Ni/SiO2: influence of Cu addition

Berndt, Fábio Martins; Perez‐Lopez, Oscar W.

doi:10.1007/s11144-016-1096-4

Cited by 45 publications

(31 citation statements)

References 34 publications

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“…In this regard, bimetallic catalysts based on the doping with low contents of noble (Ni-Cu, Ni-Pt, Ni-Pd), ferrous (Ni-Co, Ni-Fe) and refractory metals (Ni-Mo) were explored [8][9][10][11][12][13][14][15][16]. Among them, Cu doping involving the formation of the Ni (x) Cu (1-x) alloy stands out for enhancing the catalyst stability and activity at high temperature in addition to improving its reducibility and modifying the crystalline structure of the resulting carbon nanofilaments [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…Ni supported catalysts include metal oxides (SiO 2 , Al 2 O 3 , TiO 2 , MgO, and ZrO 2 ) [29,34,35], carbon materials [25,27,35] or zeolites and mesoporous silica [28,31,36] among the most used due to their thermal and chemical stability. A suitable support improves the CDM reaction influencing in the Ni crystal size and its dispersion, the support/metal interaction and the carbon diffusion mechanism [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

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Screening of Ni-Cu bimetallic catalysts for hydrogen and carbon nanofilaments production via catalytic decomposition of methane

Torres

Pinilla

Suelves

2018

Applied Catalysis A: General

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The catalytic decomposition of methane (CDM) is a H 2 production process in which the CO 2 emission of conventional processes is avoided and from which carbon nanofilaments can be obtained as a high added value by-product. In this work, we present a thermogravimetry-based screening of catalysts according to their carbon production in the CDM reaction. Catalysts studied were based on Ni as active phase, using two textural promoters (Al 2 O 3 or MgO) and Cu as dopant element in different proportions: 2.5, 5.0, 7.5

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Screening of Ni-Cu bimetallic catalysts for hydrogen and carbon nanofilaments production via catalytic decomposition of methane

Torres

Pinilla

Suelves

2018

Applied Catalysis A: General

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“…It was reported that Cu doping improved the reducibility of the Ni-based catalyst (Cu is easier to reduce than Ni) and enhanced its stability and activity in the CDM at high temperature [23][24][25][26][27][28][29][30][31][32][33][34]. The Ni-Cu alloy is formed over a wide composition range and at temperatures above 354 • C [35].…”

Section: Introductionmentioning

confidence: 99%

Co-, Cu- and Fe-Doped Ni/Al2O3 Catalysts for the Catalytic Decomposition of Methane into Hydrogen and Carbon Nanofibers

2018

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The catalytic decomposition of methane (CDM) process produces hydrogen in a single stage and avoids CO 2 emission thanks to the formation of high added value carbon nanofilaments as a by-product. In this work, Ni monometallic and Ni-Co, Ni-Cu, and Ni-Fe bimetallic catalysts are tested in the CDM reaction for the obtention of fishbone carbon nanofibers (CNF). Catalysts, in which Al 2 O 3 is used as textural promoter in their formulation, are based on Ni as main active phase for the carbon formation and on Co, Cu, or Fe as dopants in order to obtain alloys with improved catalytic behaviour. Characterization of bimetallic catalysts showed the formation of particles of Ni alloys with a bimodal size distribution. For the doping content studied (5 mol. %), only Cu formed an alloy with a lattice constant high enough to be able to favor the carbon diffusion through the catalytic particle against surface diffusion, resulting in higher carbon formations, longer activity times, and activity at 750 • C; whereas Ni, Ni-Co, and Ni-Fe catalysts were inactive. On the other hand, Fe also improved the undoped catalyst performance presenting a higher carbon formation at 700 • C and the obtention of narrow carbon nanofilaments from active Ni 3 Fe crystallites.

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“…Nickel-containing catalysts have been extensively investigated since Ni is considered the most active metal for this process [68,69]. However, nickel-based catalysts deactivate rapidly at temperatures above 600°C because the active metal sites are encapsulated within the carbon formed during the reaction [20,27,57,60,66,[70][71][72][73][74]. In the case of cobalt catalysts, their activity is lower compared to nickel catalysts [75,76].…”

Section: Metal Catalystsmentioning

confidence: 99%

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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Catalytic decomposition of methane over Ni/SiO2: influence of Cu addition

Cited by 45 publications

References 34 publications

Screening of Ni-Cu bimetallic catalysts for hydrogen and carbon nanofilaments production via catalytic decomposition of methane

Screening of Ni-Cu bimetallic catalysts for hydrogen and carbon nanofilaments production via catalytic decomposition of methane

Co-, Cu- and Fe-Doped Ni/Al2O3 Catalysts for the Catalytic Decomposition of Methane into Hydrogen and Carbon Nanofibers

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

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Catalytic decomposition of methane over Ni/SiO2: influence of Cu addition

Cited by 45 publications

References 34 publications

Screening of Ni-Cu bimetallic catalysts for hydrogen and carbon nanofilaments production via catalytic decomposition of methane

Screening of Ni-Cu bimetallic catalysts for hydrogen and carbon nanofilaments production via catalytic decomposition of methane

Co-, Cu- and Fe-Doped Ni/Al2O3 Catalysts for the Catalytic Decomposition of Methane into Hydrogen and Carbon Nanofibers

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