Thermo-Catalytic Methane Decomposition for Hydrogen Production: Effect of Palladium Promoter on Ni-based Catalysts

Mei, Irene Lock Sow; Lock, Serene Sow Mun; Vo, Dai‐Viet N.; Abdullah, Bawadi

doi:10.9767/bcrec.11.2.550.191-199

Cited by 17 publications

(11 citation statements)

References 24 publications

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“…Some of them have proved to be active catalysts, while others have shown poor performance, and then were considered as inert metals. Active metals used in methane cracking are (Ni, Pd, Pt) [41][42][43][44][45] and (Fe, Co) [46,47], which are often supported on metal oxides such as Al 2 O 3 , MgO, SiO 2 , and TiO 2 . Ni, Co, and Fe have been extensively experimented with, in particular, due to their relative abundance and lower prices compared with noble metals.…”

Section: Solid Metallic Catalystsmentioning

confidence: 99%

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Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

2021

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Currently, hydrogen is mainly generated by steam methane reforming, with significant CO2 emissions, thus exacerbating the greenhouse effect. This environmental concern promotes methane cracking, which represents one of the most promising alternatives for hydrogen production with theoretical zero CO/CO2 emissions. Methane cracking has been intensively investigated using metallic and carbonaceous catalysts. Recently, research has focused on methane pyrolysis in molten metals/salts to prevent both reactor coking and rapid catalyst deactivation frequently encountered in conventional pyrolysis. Another expected advantage is the heat transfer improvement due to the high heat capacity of molten media. Apart from the reaction itself that produces hydrogen and solid carbon, the energy source used in this endothermic process can also contribute to reducing environmental impacts. While most researchers used nonrenewable sources based on fossil fuel combustion or electrical heating, concentrated solar energy has not been thoroughly investigated, to date, for pyrolysis in molten media. However, it could be a promising innovative pathway to further improve hydrogen production sustainability from methane cracking. After recalling the basics of conventional catalytic methane cracking and the developed solar cracking reactors, this review delves into the most significant results of the state-of-the-art methane pyrolysis in melts (molten metals and salts) to show the advantages and the perspectives of this new path, as well as the carbon products’ characteristics and the main factors governing methane conversion.

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Section: Solid Metallic Catalystsmentioning

confidence: 99%

“…To enhance the catalytic performance and the lifetime of metallic catalysts, some researchers incorporated another metal herein [41][42][43]45,66]. A promoter metal is then blended with the main metallic catalyst.…”

Section: Role Of Metal Catalyst Promotersmentioning

confidence: 99%

Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

2021

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“…Thus, reaction temperature should be optimized to obtain an optimum yield from the catalyst, . [9,55] The second important parameter affecting the process parameters is the partial pressure of reactants. It has been illustrated in the previous sections that pure methane diluted with N 2 was used as feedstock in catalytic reforming reaction.…”

Section: Methane Catalytic Reforming Evaluationmentioning

confidence: 99%

“…[4][5][6][7][8] Thermocatalytic decomposition (TCD) of methane is one of the most efficient methods that produces pure hydrogen and high-quality carbon nanofiber as a by-product . [9,10] From TCD of methane, amorphous and/or crystalline carbon are formed in the form of carbon nanofibres (CNF), carbon nanotube, biwall carbon nanotube, and multiwall carbon nanotube. The carbon by-products can be further used as a valuable material for several industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterisation, and Performance Evaluation of Promoted Ni‐Based Catalysts for Thermocatalytic Decomposition of Methane

et al. 2020

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Thermocatalyatic decomposition (TCD) of methane to CO X free hydrogen and carbon nanofibre (CNF) was investigated over a series of self-designed monometallic Ni catalyst and bimetallic NiÀ Cu and NiÀ Pd catalysts. The catalysts were synthesised from the wet impregnation method and characterised using a series of complementary techniques include TGA, XRD, BET, TPR, FESEM, TEM, and Raman Spectroscopy. Despite a substantial reduction of surface area in the promoted catalysts, the catalytic activity of the promoted catalyst was enhanced due to the nature of the process which is a metal-catalysed reaction. As a whole, bimetallic PdÀ Ni catalyst with a surface area of 2.76 m 2 g À 1 possesed the highest conversion of 77 % after 6 h reaction. The overall TCD reaction was found to be first-order with the calculated activation energy, E a of 38 kJ mol À 1. The methane consumption rates at 1023 K and 1073 K were 0.5 mol s À 1 g cat À 1 and 0.58 × 10 4 mol s À 1 g cat À 1 respectively. Meanwhile, the methane consumption rates improved considerably from 0.58 mol s À 1 g cat À 1 to 0.67 × 10 4 mol s À 1 g cat À 1 under the methane partial pressure of 41 kPa. The XRD profile of the fresh catalysts revealed that mixed oxides were formed over the surface of the support upon the addition of Cu and Pd to 50 % Ni/Al 2 O 3. Moreover, the formation of carbon nanofibers followed both tip and base growth mechanisms as evident from the TEM images. Larger and wider carbon fibres were found in the Pd promoted catalyst.

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“…The catalysts were palladium promoter on Ni-based catalysts [10], carbon dioxide dry reforming of glycerol for hydrogen production using Ni/ZrO2 and Ni/CaO catalysts [11], Co/CeO2 catalyst [12], Ag-promoted Ni/SiO2 catalyst [13], and Ni/Al2O3 catalyst [14].…”

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confidence: 99%

Preface of BCREC Volume 11 Issue 2 Year 2016

Istadi¹

2016

Bull. Chem. React. Eng. Catal.

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Thermo-Catalytic Methane Decomposition for Hydrogen Production: Effect of Palladium Promoter on Ni-based Catalysts

Cited by 17 publications

References 24 publications

Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

Synthesis, Characterisation, and Performance Evaluation of Promoted Ni‐Based Catalysts for Thermocatalytic Decomposition of Methane

Preface of BCREC Volume 11 Issue 2 Year 2016

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