Elucidating the promoting role of Mo2C in methane activation using Ni-xMo2C/FAU to catalyze methane steam reforming

Zhang, Xianghui; Im, Kyungmin; Wu, Di; Ha, Su

doi:10.1016/j.apcatb.2022.121250

Cited by 16 publications

(6 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…165 It should be highlighted that although higher steam feed can effectively reduce the extent of carbon deposition, this strategy may also deactivate catalysts by destroying the internal structure of the support material or leading to the agglomeration of metallic catalyst particles. 165,167 It has been observed that the presence of a hydroxylated Ni surface due to the reaction between H 2 O and Ni leads to severe sintering of Ni via Ostwald ripening. 167 Overall, there should be a balance between the activation of CH 4 and H 2 O.…”

Section: Steam Reforming Of Chmentioning

confidence: 99%

“…165,167 It has been observed that the presence of a hydroxylated Ni surface due to the reaction between H 2 O and Ni leads to severe sintering of Ni via Ostwald ripening. 167 Overall, there should be a balance between the activation of CH 4 and H 2 O. The imbalanced dissociation of CH 4 and H 2 O can induce carbon deposition and metal sintering, and thus lead to the deactivation of Ni catalysts.…”

Section: Steam Reforming Of Chmentioning

confidence: 99%

“…In addition, the stable conversion rate and product selectivity also depend on the feed ratio of H 2 O/CH 4 . , For a low-temperature SRM on a Ni/TiO 2 catalyst, s relatively high steam feed (H 2 O:CH 4 = 3) can effectively drive carbon gasification and stabilize the SRM performance . It should be highlighted that although higher steam feed can effectively reduce the extent of carbon deposition, this strategy may also deactivate catalysts by destroying the internal structure of the support material or leading to the agglomeration of metallic catalyst particles. , It has been observed that the presence of a hydroxylated Ni surface due to the reaction between H 2 O and Ni leads to severe sintering of Ni via Ostwald ripening …”

Section: H2o As a Promotor Or Coreactant In Ch4 Activationmentioning

confidence: 99%

See 2 more Smart Citations

Role of H₂O in Catalytic Conversion of C₁ Molecules

Jiang,

Li,

Porter

et al. 2024

J. Am. Chem. Soc.

View full text Add to dashboard Cite

Due to their role in controlling global climate change, the selective conversion of C 1 molecules such as CH 4 , CO, and CO 2 has attracted widespread attention. Typically, H 2 O competes with the reactant molecules to adsorb on the active sites and therefore inhibits the reaction or causes catalyst deactivation. However, H 2 O can also participate in the catalytic conversion of C 1 molecules as a reactant or a promoter. Herein, we provide a perspective on recent progress in the mechanistic studies of H 2 Omediated conversion of C 1 molecules. We aim to provide an in-depth and systematic understanding of H 2 O as a promoter, a protontransfer agent, an oxidant, a direct source of hydrogen or oxygen, and its influence on the catalytic activity, selectivity, and stability. We also summarize strategies for modifying catalysts or catalytic microenvironments by chemical or physical means to optimize the positive effects and minimize the negative effects of H 2 O on the reactions of C 1 molecules. Finally, we discuss challenges and opportunities in catalyst design, characterization techniques, and theoretical modeling of the H 2 O-mediated catalytic conversion of C 1 molecules.

show abstract

Section: Steam Reforming Of Chmentioning

confidence: 99%

Section: Steam Reforming Of Chmentioning

confidence: 99%

Section: H2o As a Promotor Or Coreactant In Ch4 Activationmentioning

confidence: 99%

See 1 more Smart Citation

Role of H₂O in Catalytic Conversion of C₁ Molecules

Jiang,

Li,

Porter

et al. 2024

J. Am. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Additionally, CH 4 and CO 2 conversions were about 95% and 75%, respectively, with a H 2 /CO ratio of 0.7 at 800 °C and WHSV = 9000 mL g −1 h −1 . Recently, Zhang et al 165 discovered that encapsulating Ni−Mo 2 C catalysts inside zeolite Y (FAU) channels boosted their activity and stability in steam methane reforming and reported that the framework of FAU provided a microenvironment for Ni to get in close contact with Mo 2 C even under harsh reaction conditions, thus preventing Ni particles from sintering. This study provides a strategy to keep Ni and Mo 2 C dual sites in close proximity to prevent sintering.…”

Section: Strategies To Improve the Catalytic Performance Of Mo X C In...mentioning

confidence: 99%

H₂ Production from Methane Reforming over Molybdenum Carbide Catalysts: From Surface Properties and Reaction Mechanism to Catalyst Development

et al. 2022

View full text Add to dashboard Cite

Hydrogen, with its high energy content and environmental-friendly properties, is considered an effective energy carrier in addition to fossil fuels. Methane reforming represents a major method of hydrogen production, although the applied catalysts often suffer from coke deposition and metal sintering at high operating temperatures. Transition-metal carbides (TMCs), particularly molybdenum carbides (Mo x C), possess features such as Pt-like behaviors, affinity with oxidants such as CO2 and H2O, and a strong metal–support interaction for metal dispersion and stabilization, rendering them great prospective candidates for catalyzing the methane reforming reactions (MRRs). This review focuses on the recent applications and challenges of TMCs in MRRs, with an emphasis on the strategies to improve their performance by (1) engineering the operational conditions, (2) designing a dual M–Mo x C (M = Ni or Co etc.) active site, (3) dispersing M–Mo x C on supports, and (4) generating a M–Mo x C/MoO x C y interface in situ. The present review will provide guidance for the future design of efficient catalysts for H2 production from MRRs.

show abstract

“…Hydrogen (H 2 ) energy can play a vital role in changing the scenario as the combustion of H 2 leads to formation of H 2 O as product and a lesser number of pollutants are released. In industries, H 2 is produced using steam methane reforming (SMR) . Steam methane reforming is the traditional and most widely used method for H 2 production.…”

Section: Introductionmentioning

confidence: 99%

Recent Insights into the Production of Syngas and Hydrogen Using Chemical Looping-Steam Reforming (CL-SR)

Sayyed

Vaidya

2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Chemical looping-steam reforming (CL-SR) is a prospective technology for the simultaneous production of syngas and hydrogen (H2). The quality of syngas and hydrogen (H2) obtained from CL-SR process has garnered the interest of the scientific society. A recyclable oxygen storage material (oxygen carrier) is reacted through an alternating cycle of fuel (reduction step) and steam (oxidation step) at higher temperatures. Oxygen carrier (OC) plays a vital role in directing the path of the reaction in the CL-SR process. Hence, developing and selecting a proper OC is crucial. The current study intends to address recent breakthroughs in the development and performance of OCs subjected to different reacting fuel species such as methane (CL-SMR), CO2 (CL-HG), and liquid fuels. The performance of various classes of OCs such as metal oxide, mixed metal oxides, and perovskites toward conversion and lattice oxygen selectivity is investigated. The thermodynamic study and constraints related to the performance of OCs in CL-SR are discussed along with the economic evaluation of the CL-SR process and the conventional SMR process. Further, the theoretical approaches involved in determining the kinetics of the CL-SR process and kinetic models developed by the researchers are reviewed. Finally, the scientific barriers and the suggestions for optimized operation of the CL-SR process are listed.

show abstract

Elucidating the promoting role of Mo2C in methane activation using Ni-xMo2C/FAU to catalyze methane steam reforming

Cited by 16 publications

References 40 publications

Role of H₂O in Catalytic Conversion of C₁ Molecules

Role of H₂O in Catalytic Conversion of C₁ Molecules

H₂ Production from Methane Reforming over Molybdenum Carbide Catalysts: From Surface Properties and Reaction Mechanism to Catalyst Development

Recent Insights into the Production of Syngas and Hydrogen Using Chemical Looping-Steam Reforming (CL-SR)

Contact Info

Product

Resources

About

Elucidating the promoting role of Mo2C in methane activation using Ni-xMo2C/FAU to catalyze methane steam reforming

Cited by 16 publications

References 40 publications

Role of H2O in Catalytic Conversion of C1 Molecules

Role of H2O in Catalytic Conversion of C1 Molecules

H2 Production from Methane Reforming over Molybdenum Carbide Catalysts: From Surface Properties and Reaction Mechanism to Catalyst Development

Recent Insights into the Production of Syngas and Hydrogen Using Chemical Looping-Steam Reforming (CL-SR)

Contact Info

Product

Resources

About

Role of H₂O in Catalytic Conversion of C₁ Molecules

Role of H₂O in Catalytic Conversion of C₁ Molecules

H₂ Production from Methane Reforming over Molybdenum Carbide Catalysts: From Surface Properties and Reaction Mechanism to Catalyst Development