1
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Fang Z, Bao A, Lai Y, Yao L, Zeng Z, Hou R, Li J, Tang D, Chen X, Huang C, Tan Y, Chen X, Guo Q, Yang X, Yang W. Direct Visualization of CO Interaction on Oxygen Poisoned Co(0001). J Phys Chem Lett 2023; 14:9385-9391. [PMID: 37823819 DOI: 10.1021/acs.jpclett.3c02479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
The poisoning of catalysts has always been a vital issue in catalytic reactions. In this study, direct observation of the interaction of CO and oxygen-poisoned Co(0001) has been achieved with scanning tunneling microscopy (STM), temperature-programmed desorption (TPD), and density functional theory calculation. A two-stage adsorption process of CO on a well-prepared p(2×2)-O layer covered Co(0001) was directly visualized. With increasing annealing time at a certain temperature after the CO dosage, the ordered (2 × 2) pattern formed in the first stage can be recovered, suggesting the weak interaction of CO with the O-covered Co(0001) surface in the latter stage. Compared to the clean Co(0001) surface, on an oxygen-poisoned surface, no further reaction was observed, illustrating the poisoning of the catalyst. Moreover, TPD results are in good agreement with the STM observation; a desorption energy of 0.35 eV is evaluated with a simple but accurate scheme.
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Affiliation(s)
- Zihao Fang
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Anran Bao
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Yuemiao Lai
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Lanlan Yao
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Ziling Zeng
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Ruijie Hou
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Junhao Li
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Dengfang Tang
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Xiao Chen
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
- Institute of Advanced Science Facilities, Shenzhen, Guangdong 518107, China
| | - Chuanqi Huang
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Yuan Tan
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Xingkun Chen
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
| | - Qing Guo
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Xueming Yang
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Wenshao Yang
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China
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2
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Jamaati M, Torkashvand M, Sarabadani Tafreshi S, de Leeuw NH. A Review of Theoretical Studies on Carbon Monoxide Hydrogenation via Fischer-Tropsch Synthesis over Transition Metals. Molecules 2023; 28:6525. [PMID: 37764301 PMCID: PMC10650776 DOI: 10.3390/molecules28186525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/20/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
The increasing demand for clean fuels and sustainable products has attracted much interest in the development of active and selective catalysts for CO conversion to desirable products. This review maps the theoretical progress of the different facets of most commercial catalysts, including Co, Fe, Ni, Rh, and Ru. All relevant elementary steps involving CO dissociation and hydrogenation and their dependence on surface structure, surface coverage, temperature, and pressure are considered. The dominant Fischer-Tropsch synthesis mechanism is also explored, including the sensitivity to the structure of H-assisted CO dissociation and direct CO dissociation. Low-coordinated step sites are shown to enhance catalytic activity and suppress methane formation. The hydrogen adsorption and CO dissociation mechanisms are highly dependent on the surface coverage, in which hydrogen adsorption increases, and the CO insertion mechanism becomes more favorable at high coverages. It is revealed that the chain-growth probability and product selectivity are affected by the type of catalyst and its structure as well as the applied temperature and pressure.
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Affiliation(s)
- Maryam Jamaati
- Department of Physics, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran
| | - Mostafa Torkashvand
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), No. 350, Hafez Avenue, Tehran 15916-34311, Iran
| | - Saeedeh Sarabadani Tafreshi
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), No. 350, Hafez Avenue, Tehran 15916-34311, Iran
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
| | - Nora H. de Leeuw
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
- Department of Earth Sciences, Utrecht University, 3584 CB Utrecht, The Netherlands
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3
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Adsorption and activation of CO on perfect and defective h-Fe7C3 surfaces for Fischer-Tropsch synthesis. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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4
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Vasiliades MA, Govender NS, Govender A, Crous R, Moodley D, Botha T, Efstathiou AM. The Effect of H 2 Pressure on the Carbon Path of Methanation Reaction on Co/γ-Al 2O 3: Transient Isotopic and Operando Methodology Studies. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michalis A. Vasiliades
- Department of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, University Campus,
P.O. Box 20537, Nicosia, CY2109, Cyprus
| | - Nilenindran S. Govender
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Ashriti Govender
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Renier Crous
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Denzil Moodley
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Thys Botha
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Angelos M. Efstathiou
- Department of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, University Campus,
P.O. Box 20537, Nicosia, CY2109, Cyprus
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5
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Golder KM, Wintterlin J. In Situ/Operando STM of the Fischer–Tropsch Synthesis on a Co(101̅15) Surface─A Study to Bridge the Materials Gap between Single-Crystal Models and Supported Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katharina M. Golder
- Department of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Joost Wintterlin
- Department of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
- Center for NanoScience, Schellingstr. 4, 80799 Munich, Germany
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6
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Yang Q, Kondratenko VA, Petrov SA, Doronkin DE, Saraçi E, Lund H, Arinchtein A, Kraehnert R, Skrypnik AS, Matvienko AA, Kondratenko EV. Identifying Performance Descriptors in CO 2 Hydrogenation over Iron-Based Catalysts Promoted with Alkali Metals. Angew Chem Int Ed Engl 2022; 61:e202116517. [PMID: 35244964 PMCID: PMC9314630 DOI: 10.1002/anie.202116517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Indexed: 11/06/2022]
Abstract
Alkali metal promoters have been widely employed for preparation of heterogeneous catalysts used in many industrially important reactions. However, the fundamentals of their effects are usually difficult to access. Herein, we unravel mechanistic and kinetic aspects of the role of alkali metals in CO2 hydrogenation over Fe-based catalysts through state-of-the-art characterization techniques, spatially resolved steady-state and transient kinetic analyses. The promoters affect electronic properties of iron in iron carbides. These carbide characteristics determine catalyst ability to activate H2 , CO and CO2 . The Allen scale electronegativity of alkali metal promoter was successfully correlated with the rates of CO2 hydrogenation to higher hydrocarbons and CH4 as well as with the rate constants of individual steps of CO or CO2 activation. The derived knowledge can be valuable for designing and preparing catalysts applied in other reactions where such promoters are also used.
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Affiliation(s)
- Qingxin Yang
- 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
| | - Sergey A Petrov
- Institute of Solid-State Chemistry and Mechanochemistry, Kutateladze Str. 18, 630128, Novosibirsk, Russia
| | - Dmitry E Doronkin
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Herrmann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Erisa Saraçi
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Herrmann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Henrik Lund
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Aleks Arinchtein
- Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 124, 10623, Berlin, Germany
| | - Ralph Kraehnert
- Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 124, 10623, Berlin, Germany
| | - Andrey S Skrypnik
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany.,Institute of Solid-State Chemistry and Mechanochemistry, Kutateladze Str. 18, 630128, Novosibirsk, Russia.,Novosibirsk State University, Pirogova Str. 1, 630090, Novosibirsk, Russia
| | - Alexander A Matvienko
- Institute of Solid-State Chemistry and Mechanochemistry, Kutateladze Str. 18, 630128, Novosibirsk, Russia.,Novosibirsk State University, Pirogova Str. 1, 630090, Novosibirsk, Russia
| | - Evgenii V Kondratenko
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
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7
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Mechanistic Insights into the Effect of Sulfur on the Selectivity of Cobalt-Catalyzed Fischer–Tropsch Synthesis: A DFT Study. Catalysts 2022. [DOI: 10.3390/catal12040425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Sulfur is a common poison for cobalt-catalyzed Fischer–Tropsch Synthesis (FTS). Although its effects on catalytic activity are well documented, its effects on selectivity are controversial. Here, we investigated the effects of sulfur-covered cobalt surfaces on the selectivity of FTS using density functional theory (DFT) calculations. Our results indicated that sulfur on the surface of Co(111) resulted in a significant decrease in the adsorption energies of CO, HCO and acetylene, while the binding of H and CH species were not significantly affected. These findings indicate that sulfur increased the surface H/CO coverage ratio while inhibiting the adsorption of carbon chains. The elementary reactions of H-assisted CO dissociation, carbon and oxygen hydrogenation and CH coupling were also investigated on both clean and sulfur-covered Co(111). The results indicated that sulfur decreased the activation barriers for carbon and oxygen hydrogenation, while increasing the barriers for CO dissociation and CH coupling. Combining the results on elementary reactions with the modification of adsorption energies, we concluded that the intrinsic effect of sulfur on the selectivity of cobalt-catalyzed FTS is to increase the selectivity to methane and saturated short-chain hydrocarbons, while decreasing the selectivity to olefins and long-chain hydrocarbons.
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8
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Yang Q, Kondratenko VA, Petrov SA, Doronkin DE, Saraçi E, Lund H, Arinchtein A, Kraehnert R, Skrypnik AS, Matvienko AA, Kondratenko EV. Identifying Performance Descriptors in CO2 Hydrogenation over Iron‐based Catalysts Promoted with Alkali Metals. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202116517] [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)
- Qingxin Yang
- Leibniz-Institut für Katalyse eV: Leibniz-Institut fur Katalyse eV Catalyst discovery and reaction engineering GERMANY
| | - Vita A. Kondratenko
- Leibniz-Institut für Katalyse eV: Leibniz-Institut fur Katalyse eV Catalyst discovery and reaction engineering GERMANY
| | - Sergey A. Petrov
- Institute of Solid State Chemistry and Mechanochemistry SB RAS: Institut himii tverdogo tela i mehanohimii SO RAN Group of reactivity of solids RUSSIAN FEDERATION
| | - Dmitry E. Doronkin
- Karlsruhe Institute of Technology: Karlsruher Institut fur Technologie Institute of catalysis research and technology GERMANY
| | - Erisa Saraçi
- Karlsruhe Institute of Technology: Karlsruher Institut fur Technologie Institute of Catalysis Research and Technology GERMANY
| | - Henrik Lund
- Leibniz-Institut für Katalyse eV: Leibniz-Institut fur Katalyse eV Analytics GERMANY
| | - Aleks Arinchtein
- Technische Universität Berlin: Technische Universitat Berlin Department of Chemistry GERMANY
| | - Ralph Kraehnert
- Technische Universität Berlin: Technische Universitat Berlin Department of Chemistry GERMANY
| | - Andrey S. Skrypnik
- Leibniz-Institut für Katalyse eV: Leibniz-Institut fur Katalyse eV Catalyst discovery and reactionengineering GERMANY
| | - Alexander A. Matvienko
- Institute of Solid State Chemistry and Mechanochemistry SB RAS: Institut himii tverdogo tela i mehanohimii SO RAN Group of reactivity of solids RUSSIAN FEDERATION
| | - Evgenii V. Kondratenko
- Leibniz-Institut für Katalyse e. V. Catalyst Discovery and Reaction Engineering Albert-Einstein-Straße 29A 18059 Rostock GERMANY
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9
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Sun Y, Wang Y, He J, Yusuf A, Wang Y, Yang G, Xiao X. Comprehensive kinetic model for acetylene pretreated mesoporous silica supported bimetallic Co-Ni catalyst during Fischer-Trospch synthesis. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116828] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Wei J, Chen Y, Ma Y, Shi X, Zhang X, Shi C, Hu M, Liu J. Precisely Engineering Architectures of Co/C Sub-Microreactors for Selective Syngas Conversion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100082. [PMID: 33792157 DOI: 10.1002/smll.202100082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 02/08/2021] [Indexed: 06/12/2023]
Abstract
Fischer-Tropsch synthesis (FTS) is an effective route to produce olefins, gasoline, diesel, and oxygenates from syngas (CO + H2 ). However, it still remains a challenge for regulating the product distribution of FTS. Here, a series of Co/C sub-microreactors with precise designed nanoarchitectures are synthesized for selective syngas conversion. Through a combination of surface protection-assisted etching and following carbonization process, Co/C sub-microreactors with solid cube, double-shelled hollow box, and hollow box architectures, namely, Co/C-Cube, Co/C-DBox, Co/C-Box can be obtained. In FTS, comparing with solid Co/C-Cube, double-shelled hollow structured Co/C-DBox is inclined to grow long-chain hydrocarbon products, whereas hollow structured Co/C-Box avails the formation of short-chain hydrocarbon chemicals. Therefore, shape selective catalysis and controlled product distribution of FTS are realized by tuning the architectures of Co/C sub-microreactors. It is expected to fundamentally unravel the heterogeneous catalytic process via upfront designing and precisely regulating the architectures of micro/nanoreactors.
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Affiliation(s)
- Jiatong Wei
- Institute of Chemistry for Functionalized Materials, School of Chemistry and Chemical Engineering, Liaoning Normal University, 850 Huanghe Road, Dalian, 116029, China
| | - Yanping Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China
| | - Yanfu Ma
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China
| | - Xin Shi
- Institute of Chemistry for Functionalized Materials, School of Chemistry and Chemical Engineering, Liaoning Normal University, 850 Huanghe Road, Dalian, 116029, China
| | - Xiaoli Zhang
- State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Chunjing Shi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China
- School of Physics and Electronic Science, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Ming Hu
- School of Physics and Electronic Science, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Jian Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China
- DICP-Surrey Joint Centre for Future Materials, Department of Chemical and Process Engineering, and Advanced Technology Institute, University of Surrey, Guildford, Surrey, GU2 7XH, UK
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11
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Pandey U, Runningen A, Gavrilović L, Jørgensen EA, Putta KR, Rout KR, Rytter E, Blekkan EA, Hillestad M. Modeling
Fischer–Tropsch
kinetics and product distribution over a cobalt catalyst. AIChE J 2021. [DOI: 10.1002/aic.17234] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Umesh Pandey
- Norwegian University of Science and Technology Trondheim Norway
| | | | | | | | | | - Kumar R. Rout
- Norwegian University of Science and Technology Trondheim Norway
- SINTEF Industry Norway
| | - Erling Rytter
- Norwegian University of Science and Technology Trondheim Norway
- SINTEF Industry Norway
| | - Edd A. Blekkan
- Norwegian University of Science and Technology Trondheim Norway
| | - Magne Hillestad
- Norwegian University of Science and Technology Trondheim Norway
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12
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Jabłońska M. An Application of Steady‐state Isotopic‐transient Kinetic Analysis (SSITKA) in DeNO
x
Process. ChemCatChem 2021. [DOI: 10.1002/cctc.202001317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Magdalena Jabłońska
- Institute of Chemical Technology Universität Leipzig Linnéstr. 3 04103 Leipzig Germany
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13
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Böller B, Zeller P, Günther S, Wintterlin J. High-Pressure CO Phases on Co(0001) and Their Possible Role in the Fischer–Tropsch Synthesis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02221] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bernhard Böller
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
- Center for NanoScience, Schellingstr. 4, 80799 Munich, Germany
| | - Patrick Zeller
- Elettra—Sincrotrone Trieste S.C.p.A., SS14−km 163.5, 34149 Basovizza, Trieste, Italy
| | - Sebastian Günther
- Fakultät für Chemie, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany
- Catalysis Research Center, 85748 Garching, Germany
| | - Joost Wintterlin
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
- Center for NanoScience, Schellingstr. 4, 80799 Munich, Germany
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14
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Raub A, Karroum H, Athariboroujeny M, Kruse N. Chemical Transient Kinetics in Studies of the Fischer–Tropsch Reaction and Beyond. Catal Letters 2020. [DOI: 10.1007/s10562-020-03294-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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16
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Zijlstra B, Broos RJP, Chen W, Bezemer GL, Filot IAW, Hensen EJM. The Vital Role of Step-Edge Sites for Both CO Activation and Chain Growth on Cobalt Fischer–Tropsch Catalysts Revealed through First-Principles-Based Microkinetic Modeling Including Lateral Interactions. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02420] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bart Zijlstra
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Robin J. P. Broos
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Wei Chen
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - G. Leendert Bezemer
- Shell Global Solutions International B.V., Grasweg 31, 1031 HW Amsterdam, The Netherlands
| | - Ivo A. W. Filot
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
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17
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Huang H, Yu Y, Zhang M. Structure sensitivity of CH4 formation from successive hydrogenation of C on cobalt: Insights from density functional theory. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Vasiliades M, Kalamaras C, Govender N, Govender A, Efstathiou A. The effect of preparation route of commercial Co/γ-Al2O3 catalyst on important Fischer-Tropsch kinetic parameters studied by SSITKA and CO-DRIFTS transient hydrogenation techniques. J Catal 2019. [DOI: 10.1016/j.jcat.2019.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Fischer–Tropsch Synthesis: Computational Sensitivity Modeling for Series of Cobalt Catalysts. Catalysts 2019. [DOI: 10.3390/catal9100857] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Nearly a century ago, Fischer and Tropsch discovered a means of synthesizing organic compounds ranging from C1 to C70 by reacting carbon monoxide and hydrogen on a catalyst. Fischer–Tropsch synthesis (FTS) is now known as a pseudo-polymerization process taking a mixture of CO as H2 (also known as syngas) to produce a vast array of hydrocarbons, along with various small amounts of oxygenated materials. Despite the decades spent studying this process, it is still considered a black-box reaction with a mechanism that is still under debate. This investigation sought to improve our understanding by taking data from a series of experimental Fischer–Tropsch synthesis runs to build a computational model. The experimental runs were completed in an isothermal continuous stirred-tank reactor, allowing for comparison across a series of completed catalyst tests. Similar catalytic recipes were chosen so that conditional comparisons of pressure, temperature, SV, and CO/H2 could be made. Further, results from the output of the reactor that included the deviations in product selectivity, especially that of methane and CO2, were considered. Cobalt was chosen for these exams for its industrial relevance and respectfully clean process as it does not intrinsically undergo the water–gas shift (WGS). The primary focus of this manuscript was to compare runs using cobalt-based catalysts that varied in two oxide catalyst supports. The results were obtained by creating two differential equations, one for H2 and one for CO, in terms of products or groups of products. These were analyzed using sensitivity analysis (SA) to determine the products or groups that impact the model the most. The results revealed a significant difference in sensitivity between the two catalyst–support combinations. When the model equations for H2 and CO were split, the results indicated that the CO equation was significantly more sensitive to CO2 production than the H2 equation.
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20
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The active sites of a working Fischer–Tropsch catalyst revealed by operando scanning tunnelling microscopy. Nat Catal 2019. [DOI: 10.1038/s41929-019-0360-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Liu B, Li W, Xu Y, Lin Q, Jiang F, Liu X. Insight into the Intrinsic Active Site for Selective Production of Light Olefins in Cobalt-Catalyzed Fischer–Tropsch Synthesis. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00352] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Bing Liu
- Department of Chemical Engineering, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
| | - Wenping Li
- Department of Chemical Engineering, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
| | - Yuebing Xu
- Department of Chemical Engineering, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
| | - Qiang Lin
- Department of Chemical Engineering, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
| | - Feng Jiang
- Department of Chemical Engineering, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
| | - Xiaohao Liu
- Department of Chemical Engineering, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
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22
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Athariboroujeny M, Raub A, Iablokov V, Chenakin S, Kovarik L, Kruse N. Competing Mechanisms in CO Hydrogenation over Co-MnOx Catalysts. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00967] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Motahare Athariboroujeny
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Wegner Hall 155, PO Box 646515, Pullman, Washington 99164-6515, United States
| | - Andrew Raub
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Wegner Hall 155, PO Box 646515, Pullman, Washington 99164-6515, United States
| | - Viacheslav Iablokov
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Wegner Hall 155, PO Box 646515, Pullman, Washington 99164-6515, United States
| | - Sergey Chenakin
- G.V. Kurdyumov Institute for Metal Physics NASU, Akad. Vernadsky Blvd. 36, 03142 Kyiv, Ukraine
| | - Libor Kovarik
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99332, United States
| | - Norbert Kruse
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Wegner Hall 155, PO Box 646515, Pullman, Washington 99164-6515, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99332, United States
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23
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Pestman R, Chen W, Hensen E. Insight into the Rate-Determining Step and Active Sites in the Fischer–Tropsch Reaction over Cobalt Catalysts. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00185] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Robert Pestman
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Groene Loper 3, 5612 AE Eindhoven, The Netherlands
| | - Wei Chen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Groene Loper 3, 5612 AE Eindhoven, The Netherlands
| | - Emiel Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Groene Loper 3, 5612 AE Eindhoven, The Netherlands
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24
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Abstract
The bulk of the products that were synthesized from Fischer–Tropsch synthesis (FTS) is a wide range (C1–C70+) of hydrocarbons, primarily straight-chained paraffins. Additional hydrocarbon products, which can also be a majority, are linear olefins, specifically: 1-olefin, trans-2-olefin, and cis-2-olefin. Minor hydrocarbon products can include isomerized hydrocarbons, predominantly methyl-branched paraffin, cyclic hydrocarbons mainly derived from high-temperature FTS and internal olefins. Combined, these products provide 80–95% of the total products (excluding CO2) generated from syngas. A vast number of different oxygenated species, such as aldehydes, ketones, acids, and alcohols, are also embedded in this product range. These materials can be used to probe the FTS mechanism or to produce alternative chemicals. The purpose of this article is to compare the product selectivity over several FTS catalysts. Discussions center on typical product selectivity of commonly used catalysts, as well as some uncommon formulations that display selectivity anomalies. Reaction tests were conducted while using an isothermal continuously stirred tank reactor. Carbon mole percentages of CO that are converted to specific materials for Co, Fe, and Ru catalysts vary, but they depend on support type (especially with cobalt and ruthenium) and promoters (especially with iron). All three active metals produced linear alcohols as the major oxygenated product. In addition, only iron produced significant selectivities to acids, aldehydes, and ketones. Iron catalysts consistently produced the most isomerized products of the catalysts that were tested. Not only does product selectivity provide a fingerprint of the catalyst formulation, but it also points to a viable proposed mechanistic route.
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25
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Nie X, Li W, Jiang X, Guo X, Song C. Recent advances in catalytic CO2 hydrogenation to alcohols and hydrocarbons. ADVANCES IN CATALYSIS 2019. [DOI: 10.1016/bs.acat.2019.10.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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26
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Pedersen EØ, Svenum IH, Blekkan EA. Mn promoted Co catalysts for Fischer-Tropsch production of light olefins – An experimental and theoretical study. J Catal 2018. [DOI: 10.1016/j.jcat.2018.02.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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27
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Chen B, Wang D, Duan X, Liu W, Li Y, Qian G, Yuan W, Holmen A, Zhou X, Chen D. Charge-Tuned CO Activation over a χ-Fe5C2 Fischer–Tropsch Catalyst. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04370] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Bingxu Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Di Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xuezhi Duan
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wei Liu
- Nano Structural Materials Center, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yefei Li
- Collaborative Innovation Center of Chemistry for Energy Material, Fudan University, Shanghai 200433, China
| | - Gang Qian
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Weikang Yuan
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Anders Holmen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - Xinggui Zhou
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
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28
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Chen W, Pestman R, Zijlstra B, Filot IAW, Hensen EJM. Mechanism of Cobalt-Catalyzed CO Hydrogenation: 1. Methanation. ACS Catal 2017; 7:8050-8060. [PMID: 29226009 PMCID: PMC5716442 DOI: 10.1021/acscatal.7b02757] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/24/2017] [Indexed: 11/28/2022]
Abstract
![]()
The
mechanism of CO hydrogenation to CH4 at 260 °C
on a cobalt catalyst is investigated using steady-state isotopic transient
kinetic analysis (SSITKA) and backward and forward chemical transient
kinetic analysis (CTKA). The dependence of CHx residence time is determined by 12CO/H2 → 13CO/H2 SSITKA as a function of the
CO and H2 partial pressure and shows that the CH4 formation rate is mainly controlled by CHx hydrogenation rather than CO dissociation. Backward CO/H2 → H2 CTKA emphasizes the importance of
H coverage on the slow CHx hydrogenation
step. The H coverage strongly depends on the CO coverage, which is
directly related to CO partial pressure. Combining SSITKA and backward
CTKA allows determining that the amount of additional CH4 obtained during CTKA is nearly equal to the amount of CO adsorbed
to the cobalt surface. Thus, under the given conditions overall barrier
for CO hydrogenation to CH4 under methanation condition
is lower than the CO adsorption energy. Forward CTKA measurements
reveal that O hydrogenation to H2O is also a relatively
slow step compared to CO dissociation. The combined transient kinetic
data are used to fit an explicit microkinetic model for the methanation
reaction. The mechanism involving direct CO dissociation represents
the data better than a mechanism in which H-assisted CO dissociation
is assumed. Microkinetics simulations based on the fitted parameters
confirms that under methanation conditions the overall CO consumption
rate is mainly controlled by C hydrogenation and to a smaller degree
by O hydrogenation and CO dissociation. These simulations are also
used to explore the influence of CO and H2 partial pressure
on possible rate-controlling steps.
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Affiliation(s)
- Wei Chen
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Robert Pestman
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Bart Zijlstra
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ivo A. W. Filot
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Inorganic Materials Chemistry, Schuit
Institute of Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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29
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Chen W, Filot IAW, Pestman R, Hensen EJM. Mechanism of Cobalt-Catalyzed CO Hydrogenation: 2. Fischer-Tropsch Synthesis. ACS Catal 2017; 7:8061-8071. [PMID: 29226010 PMCID: PMC5716444 DOI: 10.1021/acscatal.7b02758] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/24/2017] [Indexed: 11/28/2022]
Abstract
![]()
Fischer–Tropsch
(FT) synthesis is one of the most complex
catalyzed chemical reactions in which the chain-growth mechanism that
leads to formation of long-chain hydrocarbons is not well understood
yet. The present work provides deeper insight into the relation between
the kinetics of the FT reaction on a silica-supported cobalt catalyst
and the composition of the surface adsorbed layer. Cofeeding experiments
of 12C3H6 with 13CO/H2 evidence that CHx surface intermediates
are involved in chain growth and that chain growth is highly reversible.
We present a model-based approach of steady-state isotopic transient
kinetic analysis measurements at FT conditions involving hydrocarbon
products containing up to five carbon atoms. Our data show that the
rates of chain growth and chain decoupling are much higher than the
rates of monomer formation and chain termination. An important corollary
of the microkinetic model is that the fraction of free sites, which
is mainly determined by CO pressure, has opposing effects on CO consumption
rate and chain-growth probability. Lower CO pressure and more free
sites leads to increased CO consumption rate but decreased chain-growth
probability because of an increasing ratio of chain decoupling over
chain growth. The preferred FT condition involves high CO pressure
in which chain-growth probability is increased at the expense of the
CO consumption rate.
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Affiliation(s)
- Wei Chen
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ivo A. W. Filot
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Robert Pestman
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials
Chemistry, Schuit Institute of Catalysis, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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30
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DFT study of key elementary steps for C2+ alcohol synthesis on bimetallic sites of Cu-Co shell-core structure from syngas. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.10.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Kondeboina M, Enumula SS, Muppala AR, Madduluri VR, Burri DR, Kamaraju SRR. Carbon Coating on SiO 2
in Co/C-SiO 2
Catalysts for High and Stable Activity in Nitrobenzene Hydrogenation. ChemistrySelect 2017. [DOI: 10.1002/slct.201701361] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Murali Kondeboina
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad India- 500007
| | - Siva Sankar Enumula
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad India- 500007
| | - Ashok Raju Muppala
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad India- 500007
| | - Venkata Rao Madduluri
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad India- 500007
| | - David Raju Burri
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad India- 500007
| | - Seetha Rama Rao Kamaraju
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad India- 500007
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32
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Chen Q, Svenum IH, Qi Y, Gavrilovic L, Chen D, Holmen A, Blekkan EA. Potassium adsorption behavior on hcp cobalt as model systems for the Fischer-Tropsch synthesis: a density functional theory study. Phys Chem Chem Phys 2017; 19:12246-12254. [PMID: 28451667 DOI: 10.1039/c7cp00620a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Potassium (K), an important impurity in syngas from biomass, can have a large influence on the activity and selectivity of cobalt-based Fischer-Tropsch synthesis (FTS) catalysts in Biomass to Liquids (BTL) processes. In this work, the potassium adsorption behavior on hcp cobalt was systematically studied using density functional theory. The surface energy calculations and Wulff construction of the equilibrium shape of hcp cobalt showed it is dominated by 10 facets. The interaction of K with these facets has been investigated. The results showed that the stepped facet (10-12) has the highest K adsorption energy of -2.40 eV. The facets (0001), (10-10), (10-11), (10-15), and (21-30) also showed relatively high K adsorption energies in the range of -2.28 to -2.34 eV. The corrugated facets exhibited comparatively lower K adsorption energies (-2.04 to -2.18 eV), and would be less favorable for K adsorption. It was also found that the adsorption properties depend on coverage, where the K adsorption energy decreased with increasing coverage. Diffusion energy barrier calculations indicated that K was mobile on typical facets (0001) and (10-11) with very low diffusion barriers (<0.15 eV). On stepped facets, although K could move freely along the same step (diffusion barrier <0.01 eV), diffusion from one step to another had a significantly higher barrier of 0.56 eV. This suggested that K atoms would be mobile to some extent during FTS reaction conditions, and tend to occupy the most favorable sites independent of their initial position. The results obtained in this work provide valuable information on the interaction of K with cobalt surfaces, relevant for practical cobalt catalysts and their application in BTL processes.
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Affiliation(s)
- Qingjun Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.
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33
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van Helden P, Berg JAVD, Petersen MA, Janse van Rensburg W, Ciobîcă IM, van de Loosdrecht J. Computational investigation of the kinetics and mechanism of the initial steps of the Fischer-Tropsch synthesis on cobalt. Faraday Discuss 2017; 197:117-151. [PMID: 28186212 DOI: 10.1039/c6fd00197a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A multi-site microkinetic model for the Fischer-Tropsch synthesis (FTS) reaction up to C2 products on a FCC cobalt catalyst surface is presented. This model utilizes a multi-faceted cobalt nanoparticle model for the catalyst, consisting of the two dominant cobalt surface facets Co(111) and Co(100), and a step site represented by the Co(211) surface. The kinetic parameters for the intermediates and transition states on these sites were obtained using plane-wave, periodic boundary condition density functional theory. Using direct DFT data as is, the microkinetic results disagree with the expected experimental results. Employing an exploratory approach, a small number of microkinetic model modifications were tested, which significantly improved correspondence to the expected experimental results. Using network flux and sensitivity analysis, an in-depth discussion is given on the relative reactivity of the various sites, CO activation mechanisms, the nature of the reactive chain growth monomer, the probable C2 formation mechanism, the active site ensemble interplay and the very important role of CO* surface coverage. The findings from the model scenarios are discussed with the aim of guiding future work in understanding the FTS mechanism and subsequent controlling kinetic parameters.
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34
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Petersen MA, van den Berg JA, Ciobîcă IM, van Helden P. Revisiting CO Activation on Co Catalysts: Impact of Step and Kink Sites from DFT. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02843] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Melissa A. Petersen
- Sasol, Group Technology, 1 Klasie Havenga Road, Sasolburg 1947, South Africa
| | | | - Ionel M. Ciobîcă
- Sasol Technology Netherlands B.V., Vlierstraat 111, 7544 GG Enschede, The Netherlands
| | - Pieter van Helden
- Sasol, Group Technology, 1 Klasie Havenga Road, Sasolburg 1947, South Africa
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35
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Brush A, McDonald S, Dupré R, Kota S, Mullen GM, Buddie Mullins C. Apparatus for efficient utilization of isotopically-labeled gases in pulse transient studies of heterogeneously catalyzed gas phase reactions. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00038c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transient techniques, such as steady state isotopic transient kinetic analysis (SSITKA), are powerful methods for determining various mechanistic and kinetic insights into heterogeneously catalyzed gas-phase reactions.
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Affiliation(s)
- Adrianna Brush
- McKetta Department of Chemical Engineering
- University of Texas at Austin
- C0400 Austin
- USA
| | - Shallaco McDonald
- McKetta Department of Chemical Engineering
- University of Texas at Austin
- C0400 Austin
- USA
| | - Robin Dupré
- McKetta Department of Chemical Engineering
- University of Texas at Austin
- C0400 Austin
- USA
| | - Shruti Kota
- McKetta Department of Chemical Engineering
- University of Texas at Austin
- C0400 Austin
- USA
| | - Gregory M. Mullen
- McKetta Department of Chemical Engineering
- University of Texas at Austin
- C0400 Austin
- USA
| | - C. Buddie Mullins
- McKetta Department of Chemical Engineering
- University of Texas at Austin
- C0400 Austin
- USA
- Department of Chemistry
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36
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García ME, García-Vivó D, Menéndez S, Ruiz MA. C–C and C–N Couplings in Reactions of the Benzylidyne-Bridged Complex [Mo2Cp2(μ-CPh)(μ-PCy2)(CO)2] with Small Unsaturated Organics. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00552] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Esther García
- Departamento de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Daniel García-Vivó
- Departamento de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Sonia Menéndez
- Departamento de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Miguel A. Ruiz
- Departamento de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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37
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38
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Böller B, Ehrensperger M, Wintterlin J. In Situ Scanning Tunneling Microscopy of the Dissociation of CO on Co(0001). ACS Catal 2015. [DOI: 10.1021/acscatal.5b01684] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- B. Böller
- Department
Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 Munich, Germany
| | - M. Ehrensperger
- Department
Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 Munich, Germany
| | - J. Wintterlin
- Department
Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 Munich, Germany
- Center for NanoScience, Schellingstrasse 4, 80799 Munich, Germany
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39
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Isotopic Apportioning of Hydrogen/Deuterium on the Surface of an Activated Iron Carbide Catalyst. Catal Letters 2015. [DOI: 10.1007/s10562-015-1587-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Alvarez MA, García ME, Menéndez S, Ruiz MA. Carbyne–Carbyne Coupling and H-Shifts in Reactions of the Unsaturated Methoxy- and Hydroxycarbyne Complexes [Mo2Cp2(μ-COR)(μ-CPh)(μ-PCy2)]+ with CO and Isocyanides. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00166] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Angeles Alvarez
- Departamento
de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Esther García
- Departamento
de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Sonia Menéndez
- Departamento
de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Miguel A. Ruiz
- Departamento
de Química
Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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