Electrothermal Conversion of Methane to Methanol at Room Temperature with Phosphotungstic Acid DOI
Jinquan Chang, Sikai Wang,

Max J. Hülsey

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 26, 2024

Abstract Traditional methods for the aerobic oxidation of methane to methanol frequently require use noble metal catalysts or flammable H 2 ‐O mixtures. While electrochemical enhance safety and may avoid metals, these processes suffer from low yields due limited current density and/or selectivity. Here, we design an electrothermal process conduct at room temperature using phosphotungstic acid (PTA) as a redox mediator. When electrochemically reduced, PTA activates with O produce selectively. The optimum productivity reaches 29.45 approximately 20.3 % overall electron yield. Under continuous operation, achieved 19.90 catalytic activity, over 74.3 selectivity, 10 hours durability. This approach leverages reduced initiate thermal catalysis in solution phase, addressing slow kinetics preventing overoxidations on electrode surfaces. towards production increased 40 times compared direct processes. situ generated hydroxyl radical, reaction oxygen, plays important role conversion. study demonstrates polyoxotungstate viable platform integrate thermo‐ ambient conditions.

Language: Английский

Liquid-Phase Selective Oxidation of Methane to Methane Oxygenates DOI Open Access

Jongkyu Kang,

Eun Duck Park

Catalysts, Journal Year: 2024, Volume and Issue: 14(3), P. 167 - 167

Published: Feb. 24, 2024

Methane is an abundant and relatively clean fossil fuel resource; therefore, its utilization as a chemical feedstock has major impact on the industry. However, inert nature makes direct conversion into value-added products difficult under mild conditions. Compared to gas-phase selective oxidation of methane, there have been several recent advances in liquid-phase methane. This review categorizes reports methane according solvent oxidant used. The advantages disadvantages each approach are discussed. High yields methyl bisulfate methanol precursor can be achieved using SO3 sulfuric acid; however, more attention should paid separation process overall economic analysis. aqueous-phase with situ generated H2O2 quite promising from environmental point view, provided that economical reducing agent Based current state-of-the-art this topic, directions for future research proposed.

Language: Английский

Citations

5
Size Does Matter: Technoeconomic Analysis of Methane Electro-Oxidation DOI Creative Commons
Miao Wang, Ian D. Gates

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

There is growing focus on electrochemical oxidation of methane due to greater availability renewable electricity and the desire move cleaner production methane-based bulk chemicals. We analyze economic feasibility methanol, formaldehyde, formic acid, ethanol, acetic acetaldehyde, propanol at different scales (1, 10, 100, 1000 tonnes/day) determine key performance metrics (electricity price, current density, selectivity, conversion, stack cost) that enable production. The results show price cost are most important indicators, suggesting critical deployment hurdles need be addressed efficiency cost. With grid emission factors, all processes competitive compared thermal–catalytic processes.

Language: Английский

Citations

0
Unveiling the Role of Copper Valence States in Enhancing the Catalytic Performance of Copper-Modified ZSM-5 for Direct Methane Conversion DOI Open Access

Yunhan Pu,

Huajie Zhang,

Yanjun Li

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(3), P. 277 - 277

Published: March 16, 2025

The conversion of methane (CH4) to methanol (CH3OH) under mild conditions remains a significant challenge in catalysis. In this study, we introduce method adjust the surface valence states copper species Cu-ZSM-5 catalysts by annealing different atmospheres (N2, air, and H2). Among these, 10% catalyst calcined H2 showed outstanding performance, achieving productivity 8.08 mmol/(gcat·h) 91% selectivity at 70 °C 3 MPa using H2O2 as oxidant. Comprehensive characterization revealed that optimized Cu lower state (predominantly Cu+), enhancing CH4 adsorption promoting activation generate ·OH ·CH3 radicals, which drive selective CH3OH formation. situ DRIFTS radical trapping experiments further confirmed critical role Cu+ facilitating C-H bond cleavage suppressing overoxidation.

Language: Английский

Citations

0
Photocatalytic, electrocatalytic and photoelectrocatalytic conversion of methane to alcohol DOI
Yu Huang, Lei Zou, Yuan‐Biao Huang

et al.

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2025, Volume and Issue: 70, P. 207 - 229

Published: March 1, 2025

Language: Английский

Citations

0
Electrothermal Conversion of Methane to Methanol at Room Temperature with Phosphotungstic Acid DOI
Jinquan Chang, Sikai Wang,

Max J. Hülsey

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 26, 2024

Abstract Traditional methods for the aerobic oxidation of methane to methanol frequently require use noble metal catalysts or flammable H 2 ‐O mixtures. While electrochemical enhance safety and may avoid metals, these processes suffer from low yields due limited current density and/or selectivity. Here, we design an electrothermal process conduct at room temperature using phosphotungstic acid (PTA) as a redox mediator. When electrochemically reduced, PTA activates with O produce selectively. The optimum productivity reaches 29.45 approximately 20.3 % overall electron yield. Under continuous operation, achieved 19.90 catalytic activity, over 74.3 selectivity, 10 hours durability. This approach leverages reduced initiate thermal catalysis in solution phase, addressing slow kinetics preventing overoxidations on electrode surfaces. towards production increased 40 times compared direct processes. situ generated hydroxyl radical, reaction oxygen, plays important role conversion. study demonstrates polyoxotungstate viable platform integrate thermo‐ ambient conditions.

Language: Английский

Citations

1
Challenges in the selective electrochemical oxidation of methane: Too early to surrender DOI Creative Commons
Ádám Vass, Guido Mul, Georgios Katsoukis

et al.

Current Opinion in Electrochemistry, Journal Year: 2024, Volume and Issue: 47, P. 101558 - 101558

Published: June 20, 2024

The selective electrochemical oxidation of methane (SEOM) to value-added chemicals has been pursued for decades without breakthroughs and developments beyond academic research. Main setbacks encountered in virtually every report are poor conversion rate selectivity. We propose that tangible progress, research should focus on tackling CH4 mass transport concentration limitations. At the same time, harmonized protocols must be developed, e.g., define standard control experiments key metrics. This will facilitate data comparison accelerate electrocatalyst discovery, which so far remained challenging due inconsistent reporting practices. Fundamental model (well-defined) electrocatalysts also intensified, along with in-situ spectroscopic investigations understand reaction mechanism design catalysts prevent overoxidation.

Language: Английский

Citations

1
Methanol production from biogas DOI
Kaisar Ahmad, Anifat Adenike Bankole, Maguy Abi Jaoudé

et al.

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 241 - 260

Published: Nov. 22, 2024

Language: Английский

Citations

1
Electrochemical Direct Methane to Methanol DOI

Ebrahim Ghanbari,

Mohammad Reza Rahimpour

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

Citations

0
Electrothermal Conversion of Methane to Methanol at Room Temperature with Phosphotungstic Acid DOI
Jinquan Chang, Sikai Wang,

Max J. Hülsey

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 26, 2024

Abstract Traditional methods for the aerobic oxidation of methane to methanol frequently require use noble metal catalysts or flammable H 2 ‐O mixtures. While electrochemical enhance safety and may avoid metals, these processes suffer from low yields due limited current density and/or selectivity. Here, we design an electrothermal process conduct at room temperature using phosphotungstic acid (PTA) as a redox mediator. When electrochemically reduced, PTA activates with O produce selectively. The optimum productivity reaches 29.45 approximately 20.3 % overall electron yield. Under continuous operation, achieved 19.90 catalytic activity, over 74.3 selectivity, 10 hours durability. This approach leverages reduced initiate thermal catalysis in solution phase, addressing slow kinetics preventing overoxidations on electrode surfaces. towards production increased 40 times compared direct processes. situ generated hydroxyl radical, reaction oxygen, plays important role conversion. study demonstrates polyoxotungstate viable platform integrate thermo‐ ambient conditions.

Language: Английский

Citations

0