Comparison of composite metal oxides as oxygen carrier for methane chemical looping reforming DOI
Mario Alberto Pérez-Méndez, Alejandro López‐Ortiz, Rafael Maya‐Yescas

et al.

International Journal of Chemical Reactor Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Abstract The amount of greenhouse gases has increased considerably in recent years. Additionally, the energy required by humanity for daily activities is also on rise. planet facing one its worst crises, characterized overexploitation fossil fuels due to population growth. It estimated that 2050, global will exceed 9 billion inhabitants. Chemical looping combustion (CLC), offers a potential solution. This process involves usually two interconnected reactors, with fluidized bed, where takes place an alternate way. In this process, oxygen provided solid carrier, capacity depends nature material and crucial define most effective comparative study. Moreover, methane emissions are significant concern, as potent gas 25 times greater impact atmosphere compared carbon dioxide gases. To address this, reforming chemical cycles, such Steam Reforming Looping Combustion (SR-CLC) or (CLR), proposed. Using Gibbs reactor carrier data reported literature, analysis NiWO 4 , FeMoO Fe 2 MnO FeZnO their operation, yield when exposed stream comparison between different forms schemes, well estimation needed presented. Results indicate after calculations, g-carrier/g-fuel ratio almost 100 % higher than other carriers studied work. Water vapor generates 30.0930 kW pure hydrogen can be separated while general endothermic requires 12.22 scheme. Once ideal been analyzed, proposed future work should focus optimal design reaction system allow it operate efficiently under conditions encountered. addition, necessary find replacement rate us our continuously.

Language: Английский

Catalysis-driven methane conversion to carbon and hydrogen DOI
Ganesan Sivakumar,

Abhijith Karattil Suresh,

D. Nag

et al.

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 121, P. 42 - 69

Published: March 30, 2025

Language: Английский

Citations

0
Mimicking characteristics of cast iron for enhanced electrocatalytic dehydrogenation of methane DOI

Tushar Singh Verma,

Reena Devi, Saïlaja Krishnamurty

et al.

Fuel, Journal Year: 2024, Volume and Issue: 381, P. 133674 - 133674

Published: Nov. 12, 2024

Language: Английский

Citations

1
Synergetic effect of Ni‐CeO2 bimetallic catalyst for an effective decomposition of methane to hydrogen and filamentous nanocarbons DOI Creative Commons

Adeel Ahmad,

Iqra Reyaz Hamdani,

Abdul Rasheed Pillantakath

et al.

ChemCatChem, Journal Year: 2024, Volume and Issue: 16(23)

Published: Aug. 20, 2024

Abstract The work attempts to synthesis nickel‐ceria bimetallic catalysts supported on porous carbon template, thermally stable at 850 °C, for dehydrogenation of methane hydrogen and nanostructures. A series Ni were synthesized by varying the % ceria content (30Ni‐5CeO 2 /AC, 30Ni‐10CeO 30Ni‐15CeO /AC) using incipient wetness impregnation approach. Among set catalysts, 30Ni‐5CeO /AC catalyst was found offer highest conversion stability. maximum 90 achieved with 40 feed concentration along good promoter low enhanced dispersion metal over catalytic surface, resulting in adequate metal‐support interaction. ability support thermal stability up offering high has been highlight work. Advanced analytical techniques used characterize catalyst's structural, textural, morphological properties both before after reaction. study best‐performing demonstrated formation dense nanotubes through tip‐growth mechanism exhibiting a aspect ratio.

Language: Английский

Citations

0
Enhanced Activity and Stability of Ni-Cu and Ni-Mo Bimetallic Catalysts for Dehydrogenation of Methane to Hydrogen and Nanostructured Carbons DOI
C. Srinivasakannan,

Adeel Ahmad,

Iqra Reyaz Hamdani

et al.

Published: Jan. 1, 2024

A series of Ni-Cu and Ni-Mo bimetallic catalysts on a porous carbon template were synthesized using the hydrothermal method, varying proportion Cu Mo. The optimal promoter loading that offered highest conversion stability assessed pure methane feed stock. Both Mo at 5% found to offer maximum (%), stability. exceeding 90% could be achieved 850°C for feedstock. catalyst was extremely stable until 4 hrs with 40% concentration offering near 83% 74% promoters. incorporation promoters had notable impact both catalytic activity as it contributed better dispersion metal over surface, evidenced through reduction in crystallite size. ability support along enhanced thermal Ni has been highlight work. Several characterization techniques utilized examine physicochemical characteristics fresh spent catalyst. best performing exhibited wide distribution high-quality filamentous their surface.

Language: Английский

Citations

0
Impact of Promoters on the Catalytic Performance of Nanostructured Nickel/Carbon Matrix for the Decomposition of Methane DOI Creative Commons

Adeel Ahmad,

Iqra Reyaz Hamdani,

Abdul Rasheed Pillantakath

et al.

Advanced Energy and Sustainability Research, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 24, 2024

It is of paramount importance to develop efficient catalysts for methane decomposition that withstands high operating temperatures, as the reaction endothermic equilibrium in nature. Hence, an attempt made assess effect promoters namely Cu and Mo on Ni/porous carbon matrix, synthesized using a hydrothermal method. The proportion are varied determine optimal loading, maximize conversion stability pure feedstock. space velocity from 5000 8000 mL h −1 g cat investigate effects stability. Both at 5% loading found offer maximum (%) A exceeding 90% can be achieved 850 °C with feed. demonstrate remarkable up 4 h, 40% feed concentration yielding around 83% 74% Cu. incorporation had notable impact both catalytic activity it contributes better dispersion metal over surface, evidenced by reduction crystallite size. best performing exhibit wide distribution high‐quality filamentous their surface.

Language: Английский

Citations

0
Comparison of composite metal oxides as oxygen carrier for methane chemical looping reforming DOI
Mario Alberto Pérez-Méndez, Alejandro López‐Ortiz, Rafael Maya‐Yescas

et al.

International Journal of Chemical Reactor Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Abstract The amount of greenhouse gases has increased considerably in recent years. Additionally, the energy required by humanity for daily activities is also on rise. planet facing one its worst crises, characterized overexploitation fossil fuels due to population growth. It estimated that 2050, global will exceed 9 billion inhabitants. Chemical looping combustion (CLC), offers a potential solution. This process involves usually two interconnected reactors, with fluidized bed, where takes place an alternate way. In this process, oxygen provided solid carrier, capacity depends nature material and crucial define most effective comparative study. Moreover, methane emissions are significant concern, as potent gas 25 times greater impact atmosphere compared carbon dioxide gases. To address this, reforming chemical cycles, such Steam Reforming Looping Combustion (SR-CLC) or (CLR), proposed. Using Gibbs reactor carrier data reported literature, analysis NiWO 4 , FeMoO Fe 2 MnO FeZnO their operation, yield when exposed stream comparison between different forms schemes, well estimation needed presented. Results indicate after calculations, g-carrier/g-fuel ratio almost 100 % higher than other carriers studied work. Water vapor generates 30.0930 kW pure hydrogen can be separated while general endothermic requires 12.22 scheme. Once ideal been analyzed, proposed future work should focus optimal design reaction system allow it operate efficiently under conditions encountered. addition, necessary find replacement rate us our continuously.

Language: Английский

Citations

0