1
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Liu Q, Wang R, Li R, Wang X, Zhao S, Yu C. Study on the Synergistic Effect of SiO 2 and H 2O on Oxidative Coupling of Methane over Mn-Na 2WO 4/SiO 2 Catalyst. ACS OMEGA 2024; 9:36751-36760. [PMID: 39220539 PMCID: PMC11360044 DOI: 10.1021/acsomega.4c05565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/19/2024] [Accepted: 08/09/2024] [Indexed: 09/04/2024]
Abstract
Mn-Na2WO4-based catalysts with different supports were prepared using the incipient wetness impregnation method and evaluated for their oxidative coupling of methane (OCM) reaction performance. The results demonstrated that the SiO2- supported catalyst exhibited the best catalytic performance, and the introduction of H2O further enhanced its activity. Under the conditions of a feed gas mixture of CH4/O2/H2O = 6:1:24 at 800 °C and atmospheric pressure, the CH4 conversion and C2+ selectivity over the Mn-Na2WO4/SiO2 catalyst increased from 28.4% and 77.4% (without H2O) to 33.2% and 84.9%, respectively. In contrast, the catalytic activity using TiO2 and MgO supports drastically declined. Characterizations using X-ray diffraction (XRD), in situ infrared spectroscopy (In-situ IR), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H2-TPR), and oxygen temperature-programmed desorption (O2-TPD) revealed that the introduction of steam not only served as a diluent to decrease the partial pressures of the reactants CH4 and O2, thereby reducing deep oxidation reactions in the gas phase, but also interacted with surface oxygen species (O2 2-) and silica to form adjacent surface-bonded disilanol free radicals Si-OIH. This interaction facilitated the dehydrogenation and coupling of two methane molecules on the catalyst surface, resulting in the generation of C2+ products, significantly enhancing the catalytic activity and selectivity of OCM.
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Affiliation(s)
- Qingjing Liu
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, P. R. China
| | - Ruisheng Wang
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
| | - Ranjia Li
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
| | - Xiaosheng Wang
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
| | - Suoqi Zhao
- State
Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, P. R. China
| | - Changchun Yu
- College
of New Energy and Materials, China University
of Petroleum, Beijing, 102249, P. R. China
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2
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Mousapour M, Shirini F. Comparison of the effectiveness of two piperazine based nano-catalysts in the synthesis of benzoxazoles and benzimidazoles and use of the powerful one in the N-Boc protection of amines. RSC Adv 2024; 14:9218-9227. [PMID: 38505388 PMCID: PMC10949119 DOI: 10.1039/d4ra01300j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 03/12/2024] [Indexed: 03/21/2024] Open
Abstract
In this work, a comparison between the catalytic activity of two piperazine based ionic liquids immobilized on ZnO NPs and SiO2 NPs is presented in the synthesis of benzoxazoles and benzimidazoles. These reactions are performed under solvent free conditions during appropriate reaction times with high yields. The catalyst obtained from ZnO-NPs (PINZS), as the more efficient one, is used for the efficient promotion of the N-Boc protection of amines. High chemoselectivity, no by-products, facile separation of the catalyst, short reaction times and no need for volatile organic solvents are the best features of the proposed methods.
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Affiliation(s)
- Maryam Mousapour
- Department of Chemistry, College of Sciences, University of Guilan Post Box: 1914 Rasht 41335-19141 Iran +98 131 3233262 +98 131 3233262
| | - Farhad Shirini
- Department of Chemistry, College of Sciences, University of Guilan Post Box: 1914 Rasht 41335-19141 Iran +98 131 3233262 +98 131 3233262
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3
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Chernyak SA, Corda M, Dath JP, Ordomsky VV, Khodakov AY. Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook. Chem Soc Rev 2022; 51:7994-8044. [PMID: 36043509 DOI: 10.1039/d1cs01036k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Light olefins are important feedstocks and platform molecules for the chemical industry. Their synthesis has been a research priority in both academia and industry. There are many different approaches to the synthesis of these compounds, which differ by the choice of raw materials, catalysts and reaction conditions. The goals of this review are to highlight the most recent trends in light olefin synthesis and to perform a comparative analysis of different synthetic routes using several quantitative characteristics: selectivity, productivity, severity of operating conditions, stability, technological maturity and sustainability. Traditionally, on an industrial scale, the cracking of oil fractions has been used to produce light olefins. Methanol-to-olefins, alkane direct or oxidative dehydrogenation technologies have great potential in the short term and have already reached scientific and technological maturities. Major progress should be made in the field of methanol-mediated CO and CO2 direct hydrogenation to light olefins. The electrocatalytic reduction of CO2 to light olefins is a very attractive process in the long run due to the low reaction temperature and possible use of sustainable electricity. The application of modern concepts such as electricity-driven process intensification, looping, CO2 management and nanoscale catalyst design should lead in the near future to more environmentally friendly, energy efficient and selective large-scale technologies for light olefin synthesis.
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Affiliation(s)
- Sergei A Chernyak
- University of Lille, CNRS, Centrale Lille, University of Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Lille, France.
| | - Massimo Corda
- University of Lille, CNRS, Centrale Lille, University of Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Lille, France.
| | - Jean-Pierre Dath
- Direction Recherche & Développement, TotalEnergies SE, TotalEnergies One Tech Belgium, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium
| | - Vitaly V Ordomsky
- University of Lille, CNRS, Centrale Lille, University of Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Lille, France.
| | - Andrei Y Khodakov
- University of Lille, CNRS, Centrale Lille, University of Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Lille, France.
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4
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Wang Y, Wang B, Sourav S, Batchu R, Fang Z, Kunz MR, Yablonsky G, Nikolla E, Fushimi R. Mechanistic pathways and role of oxygen in oxidative coupling of methane derived from transient kinetic studies. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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5
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Si J, Zhao G, Sun W, Liu J, Guan C, Yang Y, Shi XR, Lu Y. Oxidative Coupling of Methane: Examining the Inactivity of the MnO x -Na 2 WO 4 /SiO 2 Catalyst at Low Temperature. Angew Chem Int Ed Engl 2022; 61:e202117201. [PMID: 35181983 DOI: 10.1002/anie.202117201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Indexed: 11/07/2022]
Abstract
Oxidative coupling of methane (OCM) catalyzed by MnOx -Na2 WO4 /SiO2 has great industrial promise to convert methane directly to C2-3 products, but its high light-off temperature is the most challenging obstacle to commercialization and its working mechanism is still a mystery. We report the discovery of a low-temperature active and selective MnOx -Na2 WO4 /SiO2 catalyst enriched with Q2 units in the SiO2 carrier, being capable of converting 23 % CH4 with 72 % C2-3 selectivity at 660 °C. From experiments and theoretical calculations, a large number of Q2 units in the MnOx -Na2 WO4 /SiO2 catalyst is a trigger for markedly lowering the light-off temperature of the Mn3+ ↔Mn2+ redox cycle involved in the OCM reaction because of the easy formation of MnSiO3 . Notably, the MnSiO3 formation proceeds merely through the SiO2 -involved reaction in the presence of Na2 WO4 : Mn7 SiO12 +6 SiO2 ↔7 MnSiO3 +1.5 O2 . The Na2 WO4 not only drives the light-off of this cycle but also gets it working with substantial selectivity toward C2-3 products. Our findings shine a light on the rational design of more advanced MnOx -Na2 WO4 based OCM catalysts through establishing new Mn3+ ↔Mn2+ redox cycles with lowered light-off temperature.
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Affiliation(s)
- Jiaqi Si
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China
| | - Guofeng Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China
| | - Weidong Sun
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China
| | - Jincun Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China
| | - Cairu Guan
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, 201210, China
| | - Yong Yang
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, 201210, China
| | - Xue-Rong Shi
- Department of Materials Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Yong Lu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China.,Institute of Eco-Chongming, Shanghai, 202162, China
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Huang J, Lin J, Chen X, Zheng Y, Xiao Y, Zheng Y. Optimizing the Microstructure of SnO 2-CeO 2 Binary Oxide Supported Palladium Catalysts for Efficient and Stable Methane Combustion. ACS APPLIED MATERIALS & INTERFACES 2022; 14:16233-16244. [PMID: 35377591 DOI: 10.1021/acsami.2c01420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The preparation of palladium-based catalysts with both high catalytic activity and hydrothermal stability currently appears as a critical topic in methane combustion. Herein, we propose a facile strategy to boost the performance of SnO2-CeO2 binary oxide supported palladium catalysts by tuning the composition of supports. The coexistence of SnO2 and CeO2 phases in an appropriate ratio is favorable for the formation of both PdxCe1-xO2-δ and PdxSn1-xO2-δ solid solutions due to the reduced crystallite size. This unique microstructure could enhance the metal-support interaction to stabilize the active PdO phase and promote its reoxidation, meanwhile generating more oxygen vacancies to improve the reducibility of PdO. On account of the facilitated conversion of PdO ↔ Pd, coupled with the low-temperature dissociation of methane promoted by abundant active oxygen species, the Pd/5Sn5Ce catalyst exhibits a superior catalytic activity with a T99 of ca. 360 °C, a robust stability under both dry and wet conditions, and an excellent thermal stability during heating-cooling light-off tests.
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Affiliation(s)
- Jiangli Huang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou 350007, Fujian, P. R. China
| | - Jia Lin
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou 350007, Fujian, P. R. China
| | - Xiaohua Chen
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou 350007, Fujian, P. R. China
| | - Yong Zheng
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, P. R. China
| | - Yihong Xiao
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, P. R. China
| | - Ying Zheng
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou 350007, Fujian, P. R. China
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7
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Ortiz-Bravo CA, Figueroa SJ, Portela R, Chagas CA, Bañares MA, Toniolo FS. Elucidating the structure of the W and Mn sites on the Mn-Na2WO4/SiO2 catalyst for the oxidative coupling of methane (OCM) at real reaction temperatures. J Catal 2022. [DOI: 10.1016/j.jcat.2021.06.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Perez Ortiz A, Penteado A, Karsten T, Esche E, Grigull V, Schomäcker R, Repke J. Autothermal Oxidative Coupling of Methane: Steady‐state Multiplicity over Mn‐Na
2
WO
4
/SiO
2
at Mini‐Plant Scale. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202100195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Abigail Perez Ortiz
- Technische Universität Berlin Fachgebiet Dynamik und Betrieb technischer Anlagen, Sekr. KWT 9 Straße des 17. Juni 135 10623 Berlin Germany
| | - Alberto Penteado
- Technische Universität Berlin Fachgebiet Dynamik und Betrieb technischer Anlagen, Sekr. KWT 9 Straße des 17. Juni 135 10623 Berlin Germany
| | - Tim Karsten
- Technische Universität Berlin Fachgebiet Dynamik und Betrieb technischer Anlagen, Sekr. KWT 9 Straße des 17. Juni 135 10623 Berlin Germany
| | - Erik Esche
- Technische Universität Berlin Fachgebiet Dynamik und Betrieb technischer Anlagen, Sekr. KWT 9 Straße des 17. Juni 135 10623 Berlin Germany
| | - Vitor Grigull
- ECO Erneuerbare Energien GmbH Tobagostraße 5 27356 Rotenburg (Wümme) Germany
| | - Reinhard Schomäcker
- Technische Universität Berlin Institut für Chemie, Sekr. TC 8 Straße des 17. Juni 124 10623 Berlin Germany
| | - Jens‐Uwe Repke
- Technische Universität Berlin Fachgebiet Dynamik und Betrieb technischer Anlagen, Sekr. KWT 9 Straße des 17. Juni 135 10623 Berlin Germany
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9
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Si J, Zhao G, Sun W, Liu J, Guan C, Yang Y, Shi XR, Lu Y. Oxidative Coupling of Methane: Examining the Inactivity of the MnOx‐Na2WO4/SiO2 Catalyst at Low Temperature. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117201] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jiaqi Si
- East China Normal University School of chemistry and molecular engineering CHINA
| | - Guofeng Zhao
- East China Normal University School of chemistry and molecular engineering CHINA
| | - Weidong Sun
- East China Normal University School of chemistry and molecular engineering CHINA
| | - Jincun Liu
- East China Normal University Scool of chemistry and molecular engineering CHINA
| | - Cairu Guan
- ShanghaiTech University - Zhangjiang Campus: ShanghaiTech University School of physical Science and Technology CHINA
| | - Yong Yang
- ShanghaiTech University - Zhangjiang Campus: ShanghaiTech University School of physical science and technology CHINA
| | - Xue-Rong Shi
- Shanghai University of Engineering Science - Songjiang Campus: Shanghai University of Engineering Science Department of Materials Engineering CHINA
| | - Yong Lu
- East China Normal University School of Chemistry and Molecular Engineering 3663 North Zhongshan Road 200062 Shanghai CHINA
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10
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Oxidative coupling of methane-comparisons of MnTiO 3-Na 2WO 4 and MnO x-TiO 2-Na 2WO 4 catalysts on different silica supports. Sci Rep 2022; 12:2595. [PMID: 35173240 PMCID: PMC8850452 DOI: 10.1038/s41598-022-06598-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 01/21/2022] [Indexed: 11/09/2022] Open
Abstract
The oxidative coupling of methane (OCM) converts CH4 to value-added chemicals (C2+), such as olefins and paraffin. For a series of MnTiO3-Na2WO4 (MnTiO3-NW) and MnOx-TiO2-Na2WO4 (Mn-Ti-NW), the effect of loading of MnTiO3 or MnOx-TiO2, respectively, on two different supports (sol-gel SiO2 (SG) and commercial fumed SiO2 (CS)) was examined. The catalyst with the highest C2+ yield (21.6% with 60.8% C2+ selectivity and 35.6% CH4 conversion) was 10 wt% MnTiO3-NW/SG with an olefins/paraffin ratio of 2.2. The catalyst surfaces with low oxygen-binding energies were associated with high CH4 conversion. Stability tests conducted for over 24 h revealed that SG-supported catalysts were more durable than those on CS because the active phase (especially Na2WO4) was more stable in SG than in CS. With the use of SG, the activity of MnTiO3-NW was not substantially different from that of Mn-Ti-NW, especially at high metal loading.
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11
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Nguyen TN, Seenivasan K, Nakanowatari S, Mohan P, Tran TPN, Nishimura S, Takahashi K, Taniike T. Factors to influence low-temperature performance of supported Mn–Na2WO4 in oxidative coupling of methane. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Effect of hydroxyapatite-doping in Na-W-Mn/SiO2 catalysts on oxidative coupling of methane. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-021-0833-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Abstract
The oxidative coupling of methane (OCM) to C2 hydrocarbons (C2H4 and C2H6) has aroused worldwide interest over the past decade due to the rise of vast new shale gas resources. However, obtaining higher C2 selectivity can be very challenging in a typical OCM process in the presence of easily oxidized products such as C2H4 and C2H6. Regarding this, different types of catalysts have been studied to achieve desirable C2 yields. In this review, we briefly presented three typical types of catalysts such as alkali/alkaline earth metal doped/supported on metal oxide catalysts (mainly for Li doped/supported catalysts), modified transition metal oxide catalysts, and pyrochlore catalysts for OCM and highlighted the features that play key roles in the OCM reactions such as active oxygen species, the mobility of the lattice oxygen and surface alkalinity of the catalysts. In particular, we focused on the pyrochlore (A2B2O7) materials because of their promising properties such as high melting points, thermal stability, surface alkalinity and tunable M-O bonding for OCM reaction.
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14
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Matras D, Vamvakeros A, Jacques SDM, Grosjean N, Rollins B, Poulston S, Stenning GBG, Godini HR, Drnec J, Cernik RJ, Beale AM. Effect of thermal treatment on the stability of Na-Mn-W/SiO 2 catalyst for the oxidative coupling of methane. Faraday Discuss 2021; 229:176-196. [PMID: 33645610 DOI: 10.1039/c9fd00142e] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we investigate the effect of thermal treatment/calcination on the stability and activity of a Na-Mn-W/SiO2 catalyst for the oxidative coupling of methane. The catalyst performance and characterisation measurements suggest that the W species are directly involved in the catalyst active site responsible for CH4 conversion. Under operating conditions, the active components, present in the form of a Na-W-O-Mn molten state, are highly mobile and volatile. By varying the parameters of the calcination protocol, it was shown that these molten components can be partially stabilised, resulting in a catalyst with lower activity (due to loss of surface area) but higher stability even for long duration OCM reaction experiments.
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Affiliation(s)
- Dorota Matras
- School of Materials, University of Manchester, Manchester, Lancashire M13 9PL, UK. and Research Complex at Harwell, Harwell Science and Innovation Campus, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0FA, UK
| | - Antonios Vamvakeros
- Finden Ltd, Merchant House, 5 East St Helen Street, Abingdon, OX14 5EG, UK. and Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Simon D M Jacques
- Finden Ltd, Merchant House, 5 East St Helen Street, Abingdon, OX14 5EG, UK.
| | - Nicolas Grosjean
- Johnson Matthey Technology Centre, Blount's Court Road, Sonning Common, RG4 9NH, UK
| | - Benjamin Rollins
- Johnson Matthey Technology Centre, Blount's Court Road, Sonning Common, RG4 9NH, UK
| | - Stephen Poulston
- Johnson Matthey Technology Centre, Blount's Court Road, Sonning Common, RG4 9NH, UK
| | - Gavin B G Stenning
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK
| | - Hamid R Godini
- Technische Universität Berlin, Straße des 17 Juni 135, Sekr. KWT-9, D-10623 Berlin, Germany and Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, The Netherlands
| | - Jakub Drnec
- ESRF - The European Synchrotron, Grenoble, 38000 France
| | - Robert J Cernik
- School of Materials, University of Manchester, Manchester, Lancashire M13 9PL, UK.
| | - Andrew M Beale
- Research Complex at Harwell, Harwell Science and Innovation Campus, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0FA, UK and Finden Ltd, Merchant House, 5 East St Helen Street, Abingdon, OX14 5EG, UK. and Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
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15
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Abstract
In this work, Ho2O3 nanosheets were synthesized by a hydrothermal method. A series of Sr-modified Ho2O3 nanosheets (Sr-Ho2O3-NS) with a Sr/Ho molar ratio between 0.02 and 0.06 were prepared via an impregnation method. These catalysts were characterized by several techniques such as XRD, N2 adsorption, SEM, TEM, XPS, O2-TPD (temperature-programmed desorption), and CO2-TPD, and they were studied with respect to their performances in the oxidative coupling of methane (OCM). In contrast to Ho2O3 nanoparticles, Ho2O3 nanosheets display greater CH4 conversion and C2-C3 selectivity, which could be related to the preferentially exposed (222) facet on the surface of the latter catalyst. The incorporation of small amounts of Sr into Ho2O3 nanosheets leads to a higher ratio of (O− + O2−)/O2− as well as an enhanced amount of chemisorbed oxygen species and moderate basic sites, which in turn improves the OCM performance. The optimal catalytic behavior is achievable on the 0.04Sr-Ho2O3-NS catalyst with a Sr/Ho molar ratio of 0.04, which gives a 24.0% conversion of CH4 with 56.7% selectivity to C2-C3 at 650 °C. The C2-C3 yield is well correlated with the amount of moderate basic sites present on the catalysts.
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16
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Multi-Scale Studies of 3D Printed Mn–Na–W/SiO2 Catalyst for Oxidative Coupling of Methane. Catalysts 2021. [DOI: 10.3390/catal11030290] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This work presents multi-scale approaches to investigate 3D printed structured Mn–Na–W/SiO2 catalysts used for the oxidative coupling of methane (OCM) reaction. The performance of the 3D printed catalysts has been compared to their conventional analogues, packed beds of pellets and powder. The physicochemical properties of the 3D printed catalysts were investigated using scanning electron microscopy, nitrogen adsorption and X-ray diffraction (XRD). Performance and durability tests of the 3D printed catalysts were conducted in the laboratory and in a miniplant under real reaction conditions. In addition, synchrotron-based X-ray diffraction computed tomography technique (XRD-CT) was employed to obtain cross sectional maps at three different positions selected within the 3D printed catalyst body during the OCM reaction. The maps revealed the evolution of catalyst active phases and silica support on spatial and temporal scales within the interiors of the 3D printed catalyst under operating conditions. These results were accompanied with SEM-EDS analysis that indicated a homogeneous distribution of the active catalyst particles across the silica support.
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17
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Nguyen TN, Nakanowatari S, Nhat Tran TP, Thakur A, Takahashi L, Takahashi K, Taniike T. Learning Catalyst Design Based on Bias-Free Data Set for Oxidative Coupling of Methane. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04629] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thanh Nhat Nguyen
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Sunao Nakanowatari
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Thuy Phuong Nhat Tran
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Ashutosh Thakur
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Lauren Takahashi
- Department of Chemistry, Hokkaido University, North 10, West 8, Sapporo 060-8510, Japan
| | - Keisuke Takahashi
- Department of Chemistry, Hokkaido University, North 10, West 8, Sapporo 060-8510, Japan
| | - Toshiaki Taniike
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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18
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Morphology Effects of Nanoscale Er2O3 and Sr-Er2O3 Catalysts for Oxidative Coupling of Methane. Catal Letters 2021. [DOI: 10.1007/s10562-020-03503-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Sringam S, Kidamorn P, Chukeaw T, Chareonpanich M, Seubsai A. Investigation of metal oxide additives onto Na2WO4-Ti/SiO2 catalysts for oxidative coupling of methane to value-added chemicals. Catal Today 2020. [DOI: 10.1016/j.cattod.2020.03.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Yoon S, Lim S, Choi JW, Suh DJ, Song KH, Ha JM. Study on the unsteady state oxidative coupling of methane: effects of oxygen species from O 2, surface lattice oxygen, and CO 2 on the C 2+ selectivity. RSC Adv 2020; 10:35889-35897. [PMID: 35517104 PMCID: PMC9056964 DOI: 10.1039/d0ra06065h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 09/17/2020] [Indexed: 11/21/2022] Open
Abstract
This study examined the effects of oxygen species on the unsteady-state oxidative coupling of methane (OCM) using a lengthy catalyst bed of Na2WO4/Mn/SiO2. The reaction conditions, including the methane-to-oxygen ratio, ratio of feed gas dilution by N2, quantity of catalyst, and feed flow rate were adjusted for the continuous flow fixed bed reaction system. While the O2 gas initiated methyl radical formation from methane, the surface lattice oxygen atoms improved the dehydrogenation of paraffins to olefins without significant activation of methane. The addition of CO2 as a mild oxidizing agent was also tested and slightly improved OCM selectivity with slightly lower methane conversion were observed. This study examined the effects of oxygen species on the unsteady-state oxidative coupling of methane (OCM) using a lengthy catalyst bed of Na2WO4/Mn/SiO2.![]()
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Affiliation(s)
- Suji Yoon
- Clean Energy Research Centre, Korea Institute of Science and Technology Seoul 02792 Republic of Korea .,Department of Chemical and Biological Engineering, Korea University Seoul 02841 Republic of Korea
| | - Seoyeon Lim
- Clean Energy Research Centre, Korea Institute of Science and Technology Seoul 02792 Republic of Korea .,Department of Chemical and Biological Engineering, Korea University Seoul 02841 Republic of Korea
| | - Jae-Wook Choi
- Clean Energy Research Centre, Korea Institute of Science and Technology Seoul 02792 Republic of Korea
| | - Dong Jin Suh
- Clean Energy Research Centre, Korea Institute of Science and Technology Seoul 02792 Republic of Korea .,Graduate School of Energy and Environment (Green School), Korea University Seoul 02841 Republic of Korea
| | - Kwang Ho Song
- Department of Chemical and Biological Engineering, Korea University Seoul 02841 Republic of Korea.,Graduate School of Energy and Environment (Green School), Korea University Seoul 02841 Republic of Korea
| | - Jeong-Myeong Ha
- Clean Energy Research Centre, Korea Institute of Science and Technology Seoul 02792 Republic of Korea .,Graduate School of Energy and Environment (Green School), Korea University Seoul 02841 Republic of Korea.,Division of Energy and Environment Technology, KIST School, Korea University of Science and Technology Seoul 02792 Republic of Korea
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21
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Zhang Y, Xu J, Xu X, Xi R, Liu Y, Fang X, Wang X. Tailoring La2Ce2O7 catalysts for low temperature oxidative coupling of methane by optimizing the preparation methods. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.06.060] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Low-temperature oxidative coupling of methane using alkaline earth metal oxide-supported perovskites. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.11.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Experimental Investigation of the Oxidative Coupling of Methane in a Porous Membrane Reactor: Relevance of Back-Permeation. MEMBRANES 2020; 10:membranes10070152. [PMID: 32674409 PMCID: PMC7407320 DOI: 10.3390/membranes10070152] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 11/30/2022]
Abstract
Novel reactor configurations for the oxidative coupling of methane (OCM), and in particular membrane reactors, contribute toward reaching the yield required to make the process competitive at the industrial scale. Therefore, in this work, the conventional OCM packed bed reactor using a Mn-Na2WO4/SiO2 catalyst was experimentally compared with a membrane reactor, in which a symmetric MgO porous membrane was integrated. The beneficial effects of distributive feeding of oxygen along the membrane, which is the main advantage of the porous membrane reactor, were demonstrated, although no significant differences in terms of performance were observed because of the adverse effects of back-permeation prevailing in the experiments. A sensitivity analysis carried out on the effective diffusion coefficient also indicated the necessity of properly tuning the membrane properties to achieve the expected promising results, highlighting how this tuning could be addressed.
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24
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Aydin Z, Kondratenko VA, Lund H, Bartling S, Kreyenschulte CR, Linke D, Kondratenko EV. Revisiting Activity- and Selectivity-Enhancing Effects of Water in the Oxidative Coupling of Methane over MnOx-Na2WO4/SiO2 and Proving for Other Materials. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01493] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zeynep Aydin
- Leibniz Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Vita A. Kondratenko
- Leibniz Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Henrik Lund
- Leibniz Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Stephan Bartling
- Leibniz Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | | | - David Linke
- Leibniz Institut für Katalyse e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany
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25
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Kidamorn P, Tiyatha W, Chukeaw T, Niamnuy C, Chareonpanich M, Sohn H, Seubsai A. Synthesis of Value-Added Chemicals via Oxidative Coupling of Methanes over Na 2WO 4-TiO 2-MnO x /SiO 2 Catalysts with Alkali or Alkali Earth Oxide Additives. ACS OMEGA 2020; 5:13612-13620. [PMID: 32566826 PMCID: PMC7301378 DOI: 10.1021/acsomega.0c00537] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 05/26/2020] [Indexed: 06/11/2023]
Abstract
Na2WO4-TiO2-MnO x /SiO2 (SM) catalysts with alkali (Li, K, Rb, Cs) or alkali earth (Mg, Ca, Sr, Ba) oxide additives, which were prepared using incipient wetness impregnation, were investigated for oxidative coupling of methane (OCM) to value-added hydrocarbons (C2+). A screening test that was performed on the catalysts revealed that SM with Sr (SM-Sr) had the highest yield of C2+. X-ray photoelectron spectroscopy analyses indicated that the catalysts with a relatively low binding energy of W 4f7/2 facilitated a high CH4 conversion. A combination of crystalline MnTiO3, Mn2O3, α-cristobalite, Na2WO4, and TiO2 phases was identified as an essential component for a remarkable improvement in the activity of the catalysts in the OCM reaction. In attempts to optimize the C2+ yield, 0.25 wt % Sr onto SM-Sr achieved the highest C2+ yield at 22.9% with a 62.5% C2+ selectivity and a 36.6% CH4 conversion. A stability test of the optimal catalyst showed that after 24 h of testing, its activity decreased by 18.7%.
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Affiliation(s)
- Phattaradit Kidamorn
- Department
of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | - Worapinit Tiyatha
- Department
of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | - Thanaphat Chukeaw
- Department
of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Center
of Excellence on Petrochemical and Materials Technology, Kasetsart University, Bangkok 10900, Thailand
| | - Chalida Niamnuy
- Department
of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Research
Network of NANOTEC−KU on NanoCatalysts and NanoMaterials for
Sustainable Energy and Environment, Kasetsart
University, Bangkok 10900, Thailand
| | - Metta Chareonpanich
- Department
of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Center
of Excellence on Petrochemical and Materials Technology, Kasetsart University, Bangkok 10900, Thailand
- Research
Network of NANOTEC−KU on NanoCatalysts and NanoMaterials for
Sustainable Energy and Environment, Kasetsart
University, Bangkok 10900, Thailand
| | - Hiesang Sohn
- Department
of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul 01897, Korea
| | - Anusorn Seubsai
- Department
of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Center
of Excellence on Petrochemical and Materials Technology, Kasetsart University, Bangkok 10900, Thailand
- Research
Network of NANOTEC−KU on NanoCatalysts and NanoMaterials for
Sustainable Energy and Environment, Kasetsart
University, Bangkok 10900, Thailand
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26
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Real-time multi-length scale chemical tomography of fixed bed reactors during the oxidative coupling of methane reaction. J Catal 2020. [DOI: 10.1016/j.jcat.2020.03.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Nguyen TN, Nhat TTP, Takimoto K, Thakur A, Nishimura S, Ohyama J, Miyazato I, Takahashi L, Fujima J, Takahashi K, Taniike T. High-Throughput Experimentation and Catalyst Informatics for Oxidative Coupling of Methane. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04293] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Thanh Nhat Nguyen
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Thuy Tran Phuong Nhat
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Ken Takimoto
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Ashutosh Thakur
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Shun Nishimura
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Junya Ohyama
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Itsuki Miyazato
- Institute for Catalysis, Hokkaido University, N21, W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Lauren Takahashi
- Institute for Catalysis, Hokkaido University, N21, W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Jun Fujima
- Center for Materials Research by Information Integration, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibraki 305-0047, Japan
| | - Keisuke Takahashi
- Institute for Catalysis, Hokkaido University, N21, W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Center for Materials Research by Information Integration, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibraki 305-0047, Japan
| | - Toshiaki Taniike
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
- Center for Materials Research by Information Integration, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibraki 305-0047, Japan
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28
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Yıldız M. Mesoporous TiO2-rutile supported MnxOy-Na2WO4: Preparation, characterization and catalytic performance in the oxidative coupling of methane. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.04.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Hayek NS, Khlief GJ, Horani F, Gazit OM. Effect of reaction conditions on the oxidative coupling of methane over doped MnOx-Na2WO4/SiO2 catalyst. J Catal 2019. [DOI: 10.1016/j.jcat.2019.06.042] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Chukeaw T, Sringam S, Chareonpanich M, Seubsai A. Screening of single and binary catalysts for oxidative coupling of methane to value-added chemicals. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.03.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Fang X, Xia L, Peng L, Luo Y, Xu J, Xu L, Xu X, Liu W, Zheng R, Wang X. Ln2Zr2O7 compounds (Ln = La, Pr, Sm, Y) with varied rare earth A sites for low temperature oxidative coupling of methane. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.03.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Kiani D, Sourav S, Baltrusaitis J, Wachs IE. Oxidative Coupling of Methane (OCM) by SiO2-Supported Tungsten Oxide Catalysts Promoted with Mn and Na. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01585] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniyal Kiani
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Sagar Sourav
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Jonas Baltrusaitis
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Israel E. Wachs
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
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33
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Gordienko YA, Lomonosov VI, Ponomareva EA, Sinev MY, Bukhtiyarov AV, Vinokurov ZS. Chemical and Phase Transformation in W-Mn-Containing Catalysts for Oxidative Coupling of Methane. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419030087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Nguyen L, Tang Y, Li Y, Zhang X, Wang D, Tao FF. Dual reactor for in situ/operando fluorescent mode XAS studies of sample containing low-concentration 3d or 5d metal elements. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:054103. [PMID: 29864830 DOI: 10.1063/1.5022738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Transition metal elements are the most important elements of heterogeneous catalysts used for chemical and energy transformations. Many of these catalysts are active at a temperature higher than 400 °C. For a catalyst containing a 3d or 5d metal element with a low concentration, typically their released fluorescence upon the K-edge or L-edge adsorption of X-rays is collected for the analysis of chemical and coordination environments of these elements. However, it is challenging to perform in situ/operando X-ray absorption spectroscopy (XAS) studies of elements of low-energy absorption edges at a low concentration in a catalyst during catalysis at a temperature higher than about 450 °C. Here a unique reaction system consisting two reactors, called a dual reactor system, was designed for performing in situ or operando XAS studies of these elements of low-energy absorption edges in a catalyst at a low concentration during catalysis at a temperature higher than 450 °C in a fluorescent mode. This dual-reactor system contains a quartz reactor for preforming high-temperature catalysis up to 950 °C and a Kapton reactor remaining at a temperature up to 450 °C for collecting data in the same gas of catalysis. With this dual reactor, chemical and coordination environments of low-concentration metal elements with low-energy absorption edges such as the K-edge of 3d metals including Ti, V, Cr, Mn, Fe, Co, Ni, and Cu and L edge of 5d metals including W, Re, Os, Ir, Pt, and Au can be examined through first performing catalysis at a temperature higher than 450 °C in the quartz reactor and then immediately flipping the catalyst in the same gas flow to the Kapton reactor remained up to 450 °C to collect data. The capability of this dual reactor was demonstrated by tracking the Mn K-edge of the MnOx/Na2WO4 catalyst during activation in the temperature range of 300-900 °C and catalysis at 850 °C.
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Affiliation(s)
- Luan Nguyen
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, USA
| | - Yu Tang
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, USA
| | - Yuting Li
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, USA
| | - Xiaoyan Zhang
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, USA
| | - Ding Wang
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, USA
| | - Franklin Feng Tao
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, USA
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35
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Fleischer V, Simon U, Parishan S, Colmenares MG, Görke O, Gurlo A, Riedel W, Thum L, Schmidt J, Risse T, Dinse KP, Schomäcker R. Investigation of the role of the Na2WO4/Mn/SiO2 catalyst composition in the oxidative coupling of methane by chemical looping experiments. J Catal 2018. [DOI: 10.1016/j.jcat.2018.01.022] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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36
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Peng L, Xu J, Fang X, Liu W, Xu X, Liu L, Li Z, Peng H, Zheng R, Wang X. SnO
2
Based Catalysts with Low‐Temperature Performance for Oxidative Coupling of Methane: Insight into the Promotional Effects of Alkali‐Metal Oxides. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701440] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Liang Peng
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Junwei Xu
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Xiuzhong Fang
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Wenming Liu
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Xianglan Xu
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Liang Liu
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Zhongchen Li
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Honggen Peng
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
| | - Renyang Zheng
- Research Institute of Processing (RIIP) SINOPEC 18 Xueyuan Road Haidian District 100083 Beijing P. R. China
| | - Xiang Wang
- Institute of Applied Chemistry College of Chemistry Nanchang University 330031 Nanchang P. R. China
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37
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Hydrogen abstraction from methane on cristobalite supported W and Mn oxo complexes: A DFT study. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2017.11.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Hayek NS, Lucas NS, Warwar Damouny C, Gazit OM. Critical Surface Parameters for the Oxidative Coupling of Methane over the Mn-Na-W/SiO 2 Catalyst. ACS APPLIED MATERIALS & INTERFACES 2017; 9:40404-40411. [PMID: 29067811 DOI: 10.1021/acsami.7b14941] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The work here presents a thorough evaluation of the effect of Mn-Na-W/SiO2 catalyst surface parameters on its performance in the oxidative coupling of methane (OCM). To do so, we used microporous dealuminated β-zeolite (Zeo), or mesoporous SBA-15 (SBA), or macroporous fumed silica (Fum) as precursors for catalyst preparation, together with Mn nitrate, Mn acetate and Na2WO4. Characterizing the catalysts by inductively coupled plasma-optical emission spectroscopy, N2 physisorption, X-ray diffraction, high-resolution scanning electron microscopy-energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, and catalytic testing enabled us to identify critical surface parameters that govern the activity and C2 selectivity of the Mn-Na-W/SiO2 catalyst. Although the current paradigm views the phase transition of silica to α-cristobalite as the critical step in obtaining dispersed and stable metal sites, we show that the choice of precursors is equally or even more important with respect to tailoring the right surface properties. Specifically, the SBA-based catalyst, characterized by relatively closed surface porosity, demonstrated low activity and low C2 selectivity. By contrast, for the same composition, the Zeo-based catalyst showed an open surface pore structure, which translated up to fourfold higher activity and enhanced selectivity. By varying the overall composition of the Zeo catalysts, we show that reducing the overall W concentration reduces the size of the Na2WO4 species and increases the catalytic activity linearly as much as fivefold higher than the SBA catalyst. This linear dependence correlates well to the number of interfaces between the Na2WO4 and Mn2O3 species. Our results combined with prior studies lead us to single out the interface between Na2WO4 and Mn2O3 as the most probable active site for OCM using this catalyst. Synergistic interactions between the various precursors used and the phase transition are discussed in detail, and the conclusions are correlated to surface properties and catalysis.
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Affiliation(s)
- Naseem S Hayek
- The Wolfson Faculty of Chemical Engineering, Technion-Israel Institute of Technology , Haifa 3200003, Israel
| | - Nishita S Lucas
- The Wolfson Faculty of Chemical Engineering, Technion-Israel Institute of Technology , Haifa 3200003, Israel
| | - Christine Warwar Damouny
- The Wolfson Faculty of Chemical Engineering, Technion-Israel Institute of Technology , Haifa 3200003, Israel
| | - Oz M Gazit
- The Wolfson Faculty of Chemical Engineering, Technion-Israel Institute of Technology , Haifa 3200003, Israel
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39
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Ismagilov IZ, Matus EV, Popkova VS, Kuznetsov VV, Ushakov VA, Yashnik SA, Prosvirin IP, Kerzhentsev MA, Ismagilov ZR. Ethylene production by the oxidative condensation of methane in the presence of MnMW/SiO2 catalysts (M = Na, K, and Rb). KINETICS AND CATALYSIS 2017. [DOI: 10.1134/s0023158417050068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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40
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Nipan GD, Buzanov GA, Zhizhin KY, Kuznetsov NT. Phase states of Li(Na,K,Rb,Cs)/W/Mn/SiO2 composite catalysts for oxidative coupling of methane. RUSS J INORG CHEM+ 2016. [DOI: 10.1134/s0036023616140035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Ismagilov IZ, Matus EV, Vasil’ev SD, Kuznetsov VV, Kerzhentsev MA, Ismagilov ZR. Oxidative condensation of methane in the presence of modified MnNaW/SiO2 catalysts. KINETICS AND CATALYSIS 2015. [DOI: 10.1134/s0023158415040096] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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42
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Sadjadi S, Jašo S, Godini HR, Arndt S, Wollgarten M, Blume R, Görke O, Schomäcker R, Wozny G, Simon U. Feasibility study of the Mn–Na2WO4/SiO2 catalytic system for the oxidative coupling of methane in a fluidized-bed reactor. Catal Sci Technol 2015. [DOI: 10.1039/c4cy00822g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic system Mn–Na2WO4/SiO2, was studied in a miniplant fluidized-bed reactor for oxidative coupling of methane.
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Affiliation(s)
- S. Sadjadi
- Technische Universität Berlin
- Institut für Dynamik und Betrieb techn. Anlagen
- 10623 Berlin
- Germany
| | - S. Jašo
- Technische Universität Berlin
- Institut für Dynamik und Betrieb techn. Anlagen
- 10623 Berlin
- Germany
| | - H. R. Godini
- Technische Universität Berlin
- Institut für Dynamik und Betrieb techn. Anlagen
- 10623 Berlin
- Germany
| | - S. Arndt
- Technische Universität Berlin
- Institut für Chemie
- 10623 Berlin
- Germany
| | - M. Wollgarten
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 14109 Berlin
- Germany
| | - R. Blume
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 12489 Berlin
- Germany
| | - O. Görke
- Technische Universität Berlin
- Fakultät III Prozesswissenschaften
- Institut für Werkstoffwissenschaften und -technologien
- Fachgebiet Keramische Werkstoffe
- 10623 Berlin
| | - R. Schomäcker
- Technische Universität Berlin
- Institut für Chemie
- 10623 Berlin
- Germany
| | - G. Wozny
- Technische Universität Berlin
- Institut für Dynamik und Betrieb techn. Anlagen
- 10623 Berlin
- Germany
| | - U. Simon
- Technische Universität Berlin
- Fakultät III Prozesswissenschaften
- Institut für Werkstoffwissenschaften und -technologien
- Fachgebiet Keramische Werkstoffe
- 10623 Berlin
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