RETRACTED: Partial oxidation of methane to syngas in catalytic membrane reactor: Role of catalyst oxygen vacancies

Elbadawi, AbdAlwadood H.; Ge, Lei; Zhang, Jinxuan; Zhuang, Linzhou; Liu, Shaomin; Tan, Xiaoyao; Wang, Shaobin; Zhu, Zhonghua

doi:10.1016/j.cej.2019.123739

Cited by 26 publications

(9 citation statements)

References 55 publications

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“…We observed no such vibration on pure CeO 2 or Sm 2 O 3 (Supplementary Materials Figure S4). In fact, the SDC with 20 mol.% of Sm doping is also reported to possess the highest ion conductivity in the application of fuel cells [37,38]. Despite its different catalytic activity, the appearance of NiO phase in the XRD pattern was probably also ascribed by the crystalline nature of SDC incurred by different levels of Sm doping.…”

Section: Discussionmentioning

confidence: 99%

Studies of Nickel/Samarium-Doped Ceria for Catalytic Partial Oxidation of Methane and Effect of Oxygen Vacancy

Chien

Huang

et al. 2021

Catalysts

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We investigated the performance of nickel/samarium-doped ceria (Ni/SDC) nanocatalysts on the catalytic partial oxidation of methane (CPOM). Studies of temperature-programmed surface reaction and reduction reveal that catalytic activity is determined by a synergistic effect produced by Ni metals and metal-support interaction. Catalytic activity was more dependent on the Ni content below 600 °C, while there is not much difference for all catalysts at high temperatures. The catalyst exhibiting high activities toward syngas production (i.e., a CH4 conversion >90% at 700 °C) requires a medium Ni-SDC interaction with an Sm/Ce ratio of about 1/9 to 2/8. This is accounted for by optimum oxygen vacancies and adequate ion diffusivity in the SDCs which, as reported, also display the highest ion conductivity for fuel cell applications.

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Section: Discussionmentioning

confidence: 99%

Studies of Nickel/Samarium-Doped Ceria for Catalytic Partial Oxidation of Methane and Effect of Oxygen Vacancy

Chien

Huang

et al. 2021

Catalysts

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“…As the POM reaction is a highly exothermic reaction, the steam reforming of methane reaction is endothermic. Steam reforming of methane gives a H 2 /CO ratio of 3, which is not desirable for processes such as Fischer–Tropsch synthesis . Moreover, partial oxidation of methane provides a reaction rate of 1–2 magnitude faster than the reforming reaction .…”

Section: Natural Gas Flaring Utilization Technologiesmentioning

confidence: 99%

“…Steam reforming of methane gives a H 2 /CO ratio of 3, which is not desirable for processes such as Fischer−Tropsch synthesis. 181 Moreover, partial oxidation of methane provides a reaction rate of 1−2 magnitude faster than the reforming reaction. 182 Numerous studies on methane reforming through partial oxidation have been conducted.…”

Section: Steam Methane Reforming (Smr)mentioning

confidence: 99%

Recent Developments in Natural Gas Flaring Reduction and Reformation to Energy-Efficient Fuels: A Review

Mansoor

Tahir

2021

Energy Fuels

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Annually billions of cubic meters of natural gas are flared around the globe at various oil and gas production sites. Natural gas flaring practices waste valuable energy resources that can be used for economic support and will also be beneficial to mitigate global warming effects. In this review, an overview of natural gas flaring impacts with respect to the environment with special emphasis on global annual natural gas flaring emissions and their reformation to energy-efficient fuels has been discussed. Initially, natural gas flaring emissions and their impacts in view of environmental pollution and global warming effects have been highlighted. The strategies to mitigate wastage to valuable energy resources through various flaring management strategies are also evaluated. In the main stream, various gas flaring reductions and utilization technologies based on their applications in the oil and gas industry and especially for remote oil and gas fields are discussed. Liquified natural gas (LNG) and compressed natural gas (CNG) technologies have been identified as the main gas flaring reduction methods based on their applicability, commerciality, and economical potential. In addition, gas to liquid (GTL) has been an advancing technology for the past many years toward its utilization of methane as a feed and converting it to useful industrial products such as synthesis crude and methanol. Finally, reformation technologies for synthesis gas (syngas) production such as thermal reforming, plasma reforming, and photoreforming are deliberated. Based on feed gas mixture, different reforming processes such as steam reforming of methane (SRM), dry reforming of methane (DRM), and bi-reforming of methane (BRM) are evaluated for hydrogen-rich syngas production. The future perspectives regarding gas flaring utilization technologies advancement with further improvements in utilization of flared gas to efficient energy fuels are proposed.

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“…Ceria-based systems have been extensively employed as supports because of their unique redox properties and high oxygen storage capacities. − Crystallite size, size distribution, and morphology of the ceria particles have been identified as important parameters that influence the performance of the materials. − Another solution to the problem is the creation of stable and efficient catalysts. The stability of the catalyst will be higher if the rate of carbon oxidation is greater than the rate of its formation.…”

Section: Catalyst Developmentmentioning

confidence: 99%

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

Zagaynov

2021

Energy Fuels

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Methane transformation into more valuable products has attracted extensive attention. Synthesis gas is an important intermediate product in the chemical industry. Several syngas production methods are available, depending on the purpose of the industrial application. A major limitation of the processes is the rapid deactivation of the catalyst, which has been commonly attributed to the sintering of the active sites of catalyst and carbon formations on these sites, induced by methane decomposition and CO disproportionation. The catalyst consists of an active component and support. Ceria-based systems have been extensively employed as the support because of their unique redox properties and high oxygen storage capacity. The most promising approach is to design an excellent active site of the catalyst, based on noble or transition metals. A comparison of perspective active components, especially polymetallic components, is considered here.

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RETRACTED: Partial oxidation of methane to syngas in catalytic membrane reactor: Role of catalyst oxygen vacancies

Cited by 26 publications

References 55 publications

Studies of Nickel/Samarium-Doped Ceria for Catalytic Partial Oxidation of Methane and Effect of Oxygen Vacancy

Studies of Nickel/Samarium-Doped Ceria for Catalytic Partial Oxidation of Methane and Effect of Oxygen Vacancy

Recent Developments in Natural Gas Flaring Reduction and Reformation to Energy-Efficient Fuels: A Review

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

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