Reaction Fundamentals and Reactor Configuration for Methane Dehydroaromatization: Present State and Future Prospects DOI
Fatemeh Vatankhah, Jaber Shabanian, Mojtaba Mokhtari

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(21), P. 20112 - 20140

Published: Oct. 16, 2024

Natural gas, mainly composed of methane, has gained attention in conversion technologies due to its increased supply and low prices relative crude oil. It is important the current energy landscape, significance expected persist future, supporting transition toward a more sustainable low-carbon future. The natural gas into chemicals with added value offers way utilize this abundant resource, while promoting security decreasing pollutant emissions. However, direct nonoxidative methane dehydroaromatization (MDA) still initial research stage, there are uncertainties about enhancement approaches create commercially feasible process. We, hence, conducted thorough review critical factors that influence development efficient MDA processes. These include thermodynamic constraints, catalyst design, reaction mechanism, kinetic models, activation pathways, activity, selectivity desired products. As core review, we discussed various reactor configurations for process, including packed bed, fluidized membrane-assisted, plasma, microwave reactors. Detailed analyses were assess these reactors' strengths, weaknesses, opportunities, threats. help select an effective not only overcomes constraints deactivation challenges but also satisfies requirements implementation on commercial scale. commercial-scale plant essential, further focused summarizing accomplished modeling plant-wide economic assessment studies Based our analyses, proposed conceptual design dual-bed circulating membrane bed as emerging configuration reaction.

Language: Английский

Brønsted Acid Site Catalytic Role in Methane Dehydroaromatization over Mo/HZSM-5 DOI
Hongxiang Zhang, Lihong Wei,

Yuewen Sun

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(15), P. 11591 - 11603

Published: July 20, 2024

Language: Английский

Citations

5
Insights into the coking and regeneration processes of methanol promoted methane dehydroaromatization reaction over Mo-ZSM-5/ZSM-11 intergrown zeolites DOI
Lei Wang,

Xinxin Lei,

Weiping Zhang

et al.

Applied Catalysis A General, Journal Year: 2025, Volume and Issue: unknown, P. 120097 - 120097

Published: Jan. 1, 2025

Language: Английский

Citations

0
Evolution, Speciation, and Distribution of Mo Oxides in MFI-Type Zeolites DOI
Fateme Molajafari,

Emanuele J. Hiennadi,

Sheima J. Khatib

et al.

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Language: Английский

Citations

0
Identification and evolution of active sites in isomorphously substituted Fe-ZSM-5 catalysts for methane dehydroaromatization (MDA) DOI
Xinrui Zhang,

Jordy Ramos‐Yataco,

Shan Jiang

et al.

Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 116090 - 116090

Published: March 1, 2025

Language: Английский

Citations

0
Improving Metal Dispersion Over Mo‐based TNU‐9 for Methane Dehydro‐Aromatization DOI
Jing Hu, Chunxue Yang, Xiaodong Chen

et al.

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(15)

Published: April 1, 2025

Abstract The initial dispersion and state of the Mo‐oxide in zeolite are crucial factors development active phase selectivity toward target product (benzene, toluene, naphthalene), which greatly affects catalytic activity Mo‐doped HTNU‐9 methane dehydro‐aromatization (MDA). To investigate their impact on MDA, Mo oxide precursors (α‐MoO 3 commercial MoO ) applied this case. dispersibility is enhanced by employing solid‐phase grinding method α‐MoO onto support. SEM, EDS mapping, NH ‐TPD, 1 H MAS NMR, 2 ‐TPR, Raman, UV–vis instruments used to thoroughly key properties Mo‐containing catalysts. Based results MDA test, catalyst generated using ‐modified carrier has a conversion rate that 13.7% higher than Mo(C)/TNU‐9 (11.4%). Mo(N)/TNU‐9 thought be due use initially scattered species. During calcination, species incorporated into framework subsequently transforms more reactive utilization an elevated formation resistance hard coke easily‐burned polyaromatics.

Language: Английский

Citations

0
Impact of Iron Species Dispersion on Fe/ZSM‐5 Catalyst Performance for Methane Dehydroaromatization (MDA) DOI
Xinrui Zhang,

Jordy Ramos‐Yataco,

Amol Agarwal

et al.

ChemCatChem, Journal Year: 2024, Volume and Issue: 16(18)

Published: June 4, 2024

Abstract Methane dehydroaromatization (MDA) is one of the most promising technologies for directly transforming methane into aromatics. Unlike extensively investigated Mo/ZSM‐5 catalysts, structure and, consequently, catalytic activity Fe/ZSM‐5 are markedly influenced by method preparation, as shown here. In this study, we prepared 2 % and 4 catalysts via wet impregnation (WI) incipient wetness (IWI). Characterizations (XRD, STEM, UV‐Vis, NH 3 ‐TPD H ‐TPR) reveal that %Fe‐WI mainly possesses isolated or low‐polymerized Fe species within zeolite channels, leading to a rapid activation higher benzene yield due faster reduction iron suboxides under MDA conditions. contrast, %Fe‐IWI contains bulk oxide aggregates, resulting in slower these aggregates transform carbide through successive carbonization. A deactivation kinetic study applied further demonstrates quantitative relation between site isolation activity. Although both inevitably form sizable clusters particles high Fe/Al ratio, similar trends noted, with WI exhibiting shorter induction/activation period benzene, paralleling observations made catalysts.

Language: Английский

Citations

1
Advances and Challenges in Designing Active Site Environments in Zeolites for Brønsted Acid Catalysis DOI Creative Commons
Sopuruchukwu Ezenwa, Rajamani Gounder

Chemical Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Synthetic and post-synthetic strategies control the placement of active sites in void environments varying sizes, which turn influence reactivity selectivity during catalysis by (de)stabilizing reactive intermediates transition states.

Language: Английский

Citations

1
Reaction Fundamentals and Reactor Configuration for Methane Dehydroaromatization: Present State and Future Prospects DOI
Fatemeh Vatankhah, Jaber Shabanian, Mojtaba Mokhtari

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(21), P. 20112 - 20140

Published: Oct. 16, 2024

Natural gas, mainly composed of methane, has gained attention in conversion technologies due to its increased supply and low prices relative crude oil. It is important the current energy landscape, significance expected persist future, supporting transition toward a more sustainable low-carbon future. The natural gas into chemicals with added value offers way utilize this abundant resource, while promoting security decreasing pollutant emissions. However, direct nonoxidative methane dehydroaromatization (MDA) still initial research stage, there are uncertainties about enhancement approaches create commercially feasible process. We, hence, conducted thorough review critical factors that influence development efficient MDA processes. These include thermodynamic constraints, catalyst design, reaction mechanism, kinetic models, activation pathways, activity, selectivity desired products. As core review, we discussed various reactor configurations for process, including packed bed, fluidized membrane-assisted, plasma, microwave reactors. Detailed analyses were assess these reactors' strengths, weaknesses, opportunities, threats. help select an effective not only overcomes constraints deactivation challenges but also satisfies requirements implementation on commercial scale. commercial-scale plant essential, further focused summarizing accomplished modeling plant-wide economic assessment studies Based our analyses, proposed conceptual design dual-bed circulating membrane bed as emerging configuration reaction.

Language: Английский

Citations

1