The selective catalytic oxidation of methane to methyl bisulfate at ambient pressure

Emission control of methane from landfills has received considerable attentions in recent years. Photo-electro-catalytic oxidation of methane was carried out at the mode of continuous electrolysis and intermittent illumination with TiO2-coated titanium mesh plate as pholocatalyst and electrode in combination with ionic liquid as electrolyte under UV light irradiation. The result showed that the rapid conversion of methane was achieved under ambient pressure and temperature through photocatalytic oxidation combining with electrolysis. Under the mode of intermittent illumination (on:off = 10 min : 10 min) and continuous electrolysis (II-CE), the highest oxidation rate of methane (280 mg/(m3min)) was obtained. Under fixed off time and total illumination time, the oxidation quantity of methane linearly increased with the intermittent frequency. Photo-electro-catalytic oxidation of methane can be described by the first-order kinetics, and the apparent kinetic constant increased with the intermittent frequency.

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Nature of Cu active sites in zeolite-based catalysts for selective catalytic oxidation of methane

Research on Chemical Intermediates ◽

10.1007/s11164-019-04005-w ◽

2019 ◽

Vol 45 (12) ◽

pp. 5849-5861

Author(s):

Han Sun ◽

Chuntong Liu ◽

Haijun Chen

Keyword(s):

Catalytic Oxidation ◽

Active Sites ◽

Oxidation Of Methane ◽

Selective Catalytic Oxidation

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Water-Involved Methane Selective Catalytic Oxidation by Dioxygen over Copper-Zeolites

10.26434/chemrxiv.12715502 ◽

2020 ◽

Author(s):

Lanlan Sun ◽

Yu Wang ◽

Chuanming Wang ◽

Zaiku Xie ◽

Naijia Guan ◽

...

Keyword(s):

Catalytic Oxidation ◽

Selective Oxidation ◽

Density Functional ◽

Density Functional Theory Calculations ◽

High Catalytic Activity ◽

Oxidation Of Methane ◽

Selective Catalytic Oxidation ◽

Catalyst Temperature ◽

Temperature Programmed ◽

Space Time Yield

The selective oxidation of methane to methanol is a dream reaction of direct methane functionalization, which remains a key challenge in catalysis and a hot issue of controversy. Herein, we report the water-involved methane selective catalytic oxidation by dioxygen over copper-zeolites. At 573 K, a state-of-the-art methanol space-time yield of 543 mmol/molCu/h with methanol selectivity of 91 % is achieved with Cu-CHA catalyst. Temperature-programmed surface reactions with isotope labelling determine water as the dominating oxygen and hydrogen source of hydroxyl in methanol while dioxygen participates in the reaction <a></a><a>through reducing to water</a>. Spectroscopic analyses reveal the fast redox cycle of Cu2+-Cu+-Cu2+ during methane selective oxidation, which is closely related to the high catalytic activity of Cu-CHA. Density functional theory calculations suggest that both CuOH monomer and dimer in Cu-CHA can catalyze the selective oxidation of methane to methanol with Cu-OOH as the key reaction intermediate, and meanwhile, various copper sites undergo interconversion under reaction conditions.

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Selective Catalytic Oxidation of Methane to Syngas over Supported Mixed Oxides Containing Ni and Pt

Kinetics and Catalysis ◽

10.1023/b:kica.0000038090.84965.5e ◽

2004 ◽

Vol 45 (4) ◽

pp. 589-597 ◽

Cited By ~ 7

Author(s):

S. N. Pavlova ◽

N. N. Sazonova ◽

V. A. Sadykov ◽

O. I. Snegurenko ◽

V. A. Rogov ◽

...

Keyword(s):

Catalytic Oxidation ◽

Mixed Oxides ◽

Oxidation Of Methane ◽

Selective Catalytic Oxidation

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Water-Involved Methane Selective Catalytic Oxidation by Dioxygen over Copper-Zeolites

10.26434/chemrxiv.12715502.v1 ◽

2020 ◽

Author(s):

Lanlan Sun ◽

Yu Wang ◽

Chuanming Wang ◽

Zaiku Xie ◽

Naijia Guan ◽

...

Keyword(s):

Catalytic Oxidation ◽

Selective Oxidation ◽

Density Functional ◽

Density Functional Theory Calculations ◽

High Catalytic Activity ◽

Oxidation Of Methane ◽

Selective Catalytic Oxidation ◽

Catalyst Temperature ◽

Temperature Programmed ◽

Space Time Yield

The selective oxidation of methane to methanol is a dream reaction of direct methane functionalization, which remains a key challenge in catalysis and a hot issue of controversy. Herein, we report the water-involved methane selective catalytic oxidation by dioxygen over copper-zeolites. At 573 K, a state-of-the-art methanol space-time yield of 543 mmol/molCu/h with methanol selectivity of 91 % is achieved with Cu-CHA catalyst. Temperature-programmed surface reactions with isotope labelling determine water as the dominating oxygen and hydrogen source of hydroxyl in methanol while dioxygen participates in the reaction <a></a><a>through reducing to water</a>. Spectroscopic analyses reveal the fast redox cycle of Cu2+-Cu+-Cu2+ during methane selective oxidation, which is closely related to the high catalytic activity of Cu-CHA. Density functional theory calculations suggest that both CuOH monomer and dimer in Cu-CHA can catalyze the selective oxidation of methane to methanol with Cu-OOH as the key reaction intermediate, and meanwhile, various copper sites undergo interconversion under reaction conditions.

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A Copper-Containing Polyoxometalate-Based Metal–Organic Framework as an Efficient Catalyst for Selective Catalytic Oxidation of Alkylbenzenes

Inorganic Chemistry ◽

10.1021/acs.inorgchem.0c03741 ◽

2021 ◽

Author(s):

Baijie Xu ◽

Qian Xu ◽

Quanzhong Wang ◽

Zhen Liu ◽

Ruikun Zhao ◽

...

Keyword(s):

Catalytic Oxidation ◽

Metal Organic Framework ◽

Efficient Catalyst ◽

Selective Catalytic Oxidation ◽

Metal Organic ◽

Organic Framework

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Catalytic Oxidation of Methane

Catalysts ◽

10.3390/catal11080944 ◽

2021 ◽

Vol 11 (8) ◽

pp. 944

Author(s):

Anil C. Banerjee

Keyword(s):

Power Generation ◽

Natural Gas ◽

Catalytic Oxidation ◽

Energy Sources ◽

Oxidation Of Methane

Methane (the major component of natural gas) is one of the main energy sources for gas-powered turbines for power generation, and transport vehicles [...]

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