From fundamentals to chemical engineering on oxidative coupling of methane for ethylene production: A review

Liu, Jiao; Yue, Junrong; Lv, Mei; Wang, Fang; Cui, Yanbin; Zhang, Zhanguo; Xu, Guangwen

doi:10.1016/j.crcon.2021.11.001

Cited by 46 publications

(30 citation statements)

References 168 publications

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“…One of the most studied catalyst for OCM reaction, Mn–Na 2 WO 4 , is reported to show methane conversions at 800 °C at a much higher CH 4 to O 2 ratio. [ 30,31 ] Hence, a much lower onset temperature of 600 °C for BMNF33 indicates significant potential for reducing the OCM operating temperatures. Interestingly, the contribution from CO and CO 2 is comparatively smaller than that of ethylene in this temperature range.…”

Section: Resultsmentioning

confidence: 99%

Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene

Denoyer

Benavidez

Garzón

et al. 2022

Adv Materials Inter

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Methane conversion into value‐added products such as olefins and aromatics is gaining increased attention in the wake of new natural gas reserve discoveries. Electrochemical oxidative coupling of methane (E‐OCM) provides better product selectivity as the product distribution can be controlled by applied potential as well as the oxide ion flux. Here a new catalyst based on Mg and Fe codoped barium niobate perovskites is reported. The prepared perovskites show excellent chemical stability in CH4‐rich environments up to 925 °C while showing methane activation properties from 600 °C. E‐OCM measurements indicate an ethylene production rate of 277 µmol cm−2 h−1 with a faradaic efficiency of 20% at 1 V and durable operation for six continuous days. X‐ray photoelectron spectroscopic measurements indicate significant Nb valency reorganization that can be the reason for its chemical stability. Nevertheless, the surface area of the catalyst is significantly lower and requires improvements in synthesis methodologies to improve catalytic activity further. The exceptional chemical stability of this perovskite material under methane exposure at high temperatures has significant importance as this material can be used as a catalyst and/or support in a wide variety of applications relevant for efficient energy conversion and storage.

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Section: Resultsmentioning

confidence: 99%

Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene

Denoyer

Benavidez

Garzón

et al. 2022

Adv Materials Inter

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“…• radicals will be coupled in the gas phase homogeneously to form ethane. 1,2 In turn, ethane will be further dehydrogenated into ethylene in the gas phase with the following equations 4 + + (10)…”

Section: As Shown By Xrd Results Inmentioning

confidence: 99%

“…The eco-friendly and economical OCM process to produce C 2 products has attracted worldwide interest as a technology to supply the important chemical platform molecule ethylene. 1 However, since the investigation of this reaction by Keller and Bhasin in 1982, 2 after decade's of research efforts, the industrial application of OCM has not been accomplished due to the high stability of CH 4 molecules. Moreover, the thermodynamic and kinetic issues also put limitations on it.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the thermodynamic and kinetic issues also put limitations on it. 1,3 For instance, the total oxidation products (CO x ) are more stable and generated faster than C 2 products. 1,3 It is commonly agreed that the OCM reaction involves the generation of CH 3…”

Section: Introductionmentioning

confidence: 99%

“…However, since the investigation of this reaction by Keller and Bhasin in 1982, after decade’s of research efforts, the industrial application of OCM has not been accomplished due to the high stability of CH 4 molecules. Moreover, the thermodynamic and kinetic issues also put limitations on it. , For instance, the total oxidation products (CO x ) are more stable and generated faster than C 2 products. , It is commonly agreed that the OCM reaction involves the generation of CH 3 • on a catalyst surface, which will in turn be coupled in the gas phase to form ethane and then dehydrogenated to ethylene.…”

Section: Introductionmentioning

confidence: 99%

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Constructing Y₂B₂O₇ (B = Ti, Sn, Zr, Ce) Compounds to Disclose the Effect of Surface Acidity–Basicity on Product Selectivity for Oxidative Coupling of Methane (OCM)

Gong

et al. 2022

Inorg. Chem.

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To investigate the influence of surface acidity and basicity on the OCM reaction, four pure-phase Y 2 B 2 O 7 (B = Ti, Sn, Zr, Ce) compounds have been purposely constructed. The exquisite phase structure change results in the generation of different amounts of surface active O 2 − and O − sites, which affects CH 4 molecule activation. Furthermore, both Lewis acidic sites and basic sites are formed on the catalysts in different amounts, which are related to the lattice disorder extent and the choice of A-and B-site elements. It is elucidated with strong evidence that the surface basic sites are favorable to C 2 product selectivity, but the surface acidic sites lead to deep oxidation of CH 4 and the coupling products to form CO x . To design and fabricate Y 2 B 2 O 7 catalysts with better C 2 product selectivity for the reaction, a disordered defect fluorite structure should be engineered with A-and B-site elements having appropriate basicity.

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Recent Advances in the Conversion of Methane to Syngas and Chemicals via Photocatalysis

Li,

Zheng,

Gong

et al. 2023

ChemPhotoChem

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As a primary constituent of natural gas and shale gas, direct conversion of methane has attracted significant attention due to its potential to reduce energy consumption and CO2 emissions. Compared with thermal catalysis, photocatalysis has the capacity to transcend thermodynamic constraint and enable the conversion of sustainable solar energy into chemical energy under mild reaction condition, which contributes to optimize the utilization of methane. In this review, we undertake a comparative analysis of various strategies for photocatalytic methane conversion to syngas and chemicals, including photocatalytic reforming of methane, photocatalytic partial oxidation of methane and photocatalytic coupling of methane. The distinct reaction systems with corresponding catalysts and underlying mechanisms are expounded in detail to foster a profound comprehension of solar‐driven methane conversion. Finally, the challenges and prospectives in photocatalytic methane conversion are discussed.

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From fundamentals to chemical engineering on oxidative coupling of methane for ethylene production: A review

Cited by 46 publications

References 168 publications

Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene

Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene

Constructing Y₂B₂O₇ (B = Ti, Sn, Zr, Ce) Compounds to Disclose the Effect of Surface Acidity–Basicity on Product Selectivity for Oxidative Coupling of Methane (OCM)

Recent Advances in the Conversion of Methane to Syngas and Chemicals via Photocatalysis

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From fundamentals to chemical engineering on oxidative coupling of methane for ethylene production: A review

Cited by 46 publications

References 168 publications

Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene

Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene

Constructing Y2B2O7 (B = Ti, Sn, Zr, Ce) Compounds to Disclose the Effect of Surface Acidity–Basicity on Product Selectivity for Oxidative Coupling of Methane (OCM)

Recent Advances in the Conversion of Methane to Syngas and Chemicals via Photocatalysis

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Product

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Constructing Y₂B₂O₇ (B = Ti, Sn, Zr, Ce) Compounds to Disclose the Effect of Surface Acidity–Basicity on Product Selectivity for Oxidative Coupling of Methane (OCM)