Recent advances and future prospect in catalysts for oxidative coupling of methane to ethylene: A review

Gambo, Yahya; Jalil, Aishah Abdul; Triwahyono, Sugeng; Abdul-Rahman, Alias

doi:10.1016/j.jiec.2017.10.027

Cited by 200 publications

(120 citation statements)

References 142 publications

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“…The reaction mechanism is also accounted for the free radical coupling reactions such as oxidative coupling of methane. The selectivity to C 2 -hydrocarbons may be as high as 20% for the reaction proceeded under certain conditions, through a gas-phase reaction route [73,74]. These C 2 -hydrocarbons are undesirable during the catalytic partial oxidation process, as they can cause the problem related to the formation of coke.…”

Section: Reaction Mechanismsmentioning

confidence: 99%

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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This paper addresses the issues related to the favorable operating conditions for the small-scale production of synthesis gas from the catalytic partial oxidation of methane over rhodium. Numerical simulations were performed by means of computational fluid dynamics to explore the key factors influencing the yield of synthesis gas. The effect of mixture composition, pressure, preheating temperature, and reactor dimension was evaluated to identify conditions that favor a high yield of synthesis gas. The relative importance of heterogeneous and homogenous reaction pathways in determining the distribution of reaction products was investigated. The results indicated that there is competition between the partial and total oxidation reactions occurring in the system, which is responsible for the distribution of reaction products. The contribution of heterogeneous and homogeneous reaction pathways depends upon process conditions. The temperature and pressure play an important role in determining the fuel conversion and the synthesis gas yield. Undesired homogeneous reactions are favored in large reactors, and at high temperatures and pressures, whereas desired heterogeneous reactions are favored in small reactors, and at low temperatures and pressures. At atmospheric pressure, the selectivity to synthesis gas is higher than 98% at preheating temperatures above 900 K when oxygen is used as the oxidant. At pressures below 1.0 MPa, alteration of the dimension in the range of 0.3 and 1.5 mm does not result in significant difference in reactor performance, if made at constant inlet flow velocities. Air shows great promise as the oxidant, especially at industrially relevant pressure 3.0 MPa, thereby effectively inhibiting the initiation of undesired homogeneous reactions.

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Section: Reaction Mechanismsmentioning

confidence: 99%

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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“…Despite 30 years of studies on the OCM process investigating the optimal reaction conditions, different reactor designs and catalyst formulations [5][6][7][8][9][10] there are still limiting factors for the industrial implementation of the OCM technology. One of the main challenges in methane activation is related to the fact that the desired products (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, the Na-Mn-W/SiO 2 is generally accepted to be one of the most promising catalyst materials showing high catalytic performance (> 20 % yield) and long-term stability [15][16][17] . Numerous studies and reviews [18][19][20] have focused on investigating the nature of active phases/species as well as on determining the optimal catalyst composition, preferred preparation method and the role of catalyst promoters. It should be noted though that there is still much debate regarding the phases/species of the Na-Mn-W/SiO 2 catalyst including two main theories regarding the nature of active site(s).…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal treatment on the stability of Na–Mn–W/SiO₂ catalyst for the oxidative coupling of methane

et al. 2021

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“…Crude-to-chemicals (COTC), i.e. direct production of chemicals and petrochemicals such as olefins and aromatics directly from crude oil, as opposed to via thermal cracking of naphtha/ethane (for olefins) and via traditional refining reforming (for aromatics), is one current industrial tendency [19], together with the development of direct routes for methane to olefins and aromatics [20,21]. Silura OCM (oxidative coupling of methane) process is one example of technology under development attracting increasing interest.…”

Section: Developing Alternative Carbon Sourcesmentioning

confidence: 99%

Chemical engineering role in the use of renewable energy and alternative carbon sources in chemical production

2019

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There is a demand for new chemical reaction technologies and associated engineering aspects due to on-going transition in energy and chemistry associated to moving out progressively from the use of fossil fuels. Focus is given in this review on two main aspects: i) the development of alternative carbon sources and ii) the integration of renewable energy in the chemical production. It is shown how addressing properly these aspects requires to develop also a) new tools for chemical engineering assessment and b) innovative methodologies for the development of the materials, reactors and processes. This review evidences the need to accelerate studies on these directions, being a crucial element to catalyze the transition to a more sustainable use of energy and chemistry. It is remarked, however, the need to go beyond the traditional approaches, with some examples given. In fact, the presence of radical changes in the way of production is underlined, requiring thus novel fundamentals and applied engineering approaches.

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Recent advances and future prospect in catalysts for oxidative coupling of methane to ethylene: A review

Cited by 200 publications

References 142 publications

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Effect of thermal treatment on the stability of Na–Mn–W/SiO₂ catalyst for the oxidative coupling of methane

Chemical engineering role in the use of renewable energy and alternative carbon sources in chemical production

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Recent advances and future prospect in catalysts for oxidative coupling of methane to ethylene: A review

Cited by 200 publications

References 142 publications

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Effect of thermal treatment on the stability of Na–Mn–W/SiO2 catalyst for the oxidative coupling of methane

Chemical engineering role in the use of renewable energy and alternative carbon sources in chemical production

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Effect of thermal treatment on the stability of Na–Mn–W/SiO₂ catalyst for the oxidative coupling of methane