1
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Lindley M, Stishenko P, Crawley JWM, Tinkamanyire F, Smith M, Paterson J, Peacock M, Xu Z, Hardacre C, Walton AS, Logsdail AJ, Haigh SJ. Tuning the Size of TiO 2-Supported Co Nanoparticle Fischer-Tropsch Catalysts Using Mn Additions. ACS Catal 2024; 14:10648-10657. [PMID: 39050900 PMCID: PMC11264206 DOI: 10.1021/acscatal.4c02721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 07/27/2024]
Abstract
Modifying traditional Co/TiO2-based Fischer-Tropsch (FT) catalysts with Mn promoters induces a selectivity shift from long-chain paraffins toward commercially desirable alcohols and olefins. In this work, we use in situ gas cell scanning transmission electron microscopy (STEM) with energy-dispersive X-ray spectroscopy (EDS) elemental mapping, and near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) to demonstrate how the elemental dispersion and chemical structure of the as-calcined materials evolve during the H2 activation heat treatment required for industrial CoMn/TiO2 FT catalysts. We find that Mn additions reduce both the mean Co particle diameter and the size distribution but that the Mn remains dispersed on the support after the activation step. Density functional theory calculations show that the slower surface diffusion of Mn is likely due to the lower number of energetically accessible sites for the Mn on the titania support and that favorable Co-Mn interactions likely cause greater dispersion and slower sintering of Co in the Mn-promoted catalyst. These mechanistic insights into how the introduction of Mn tunes the Co nanoparticle size can be applied to inform the design of future-supported nanoparticle catalysts for FT and other heterogeneous catalytic processes.
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Affiliation(s)
- Matthew Lindley
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Pavel Stishenko
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff CF10
3AT, U.K.
| | - James W. M. Crawley
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff CF10
3AT, U.K.
| | - Fred Tinkamanyire
- Department
of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Matthew Smith
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - James Paterson
- bp,
Applied Sciences, Innovation & Engineering, Saltend, Hull HU12 8DS, U.K.
| | - Mark Peacock
- bp,
Applied Sciences, Innovation & Engineering, Saltend, Hull HU12 8DS, U.K.
| | - Zhuoran Xu
- bp,
Applied Sciences, Innovation & Engineering, Chicago, Illinois 60606, United States
| | - Christopher Hardacre
- Department
of Chemical Engineering and Analytical Science, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Alex S. Walton
- Department
of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Andrew J. Logsdail
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff CF10
3AT, U.K.
| | - Sarah J. Haigh
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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Jeske K, Rösler T, Belleflamme M, Rodenas T, Fischer N, Claeys M, Leitner W, Vorholt AJ, Prieto G. Direct Conversion of Syngas to Higher Alcohols via Tandem Integration of Fischer-Tropsch Synthesis and Reductive Hydroformylation. Angew Chem Int Ed Engl 2022; 61:e202201004. [PMID: 35491237 PMCID: PMC9400900 DOI: 10.1002/anie.202201004] [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: 01/27/2022] [Indexed: 02/03/2023]
Abstract
The selective conversion of syngas to higher alcohols is an attractive albeit elusive route in the quest for effective production of chemicals from alternative carbon resources. We report the tandem integration of solid cobalt Fischer–Tropsch and molecular hydroformylation catalysts in a one‐pot slurry‐phase process. Unprecedented selectivities (>50 wt %) to C2+ alcohols are achieved at CO conversion levels >70 %, alongside negligible CO2 side‐production. The efficient overall transformation is enabled by catalyst engineering, bridging gaps in operation temperature and intrinsic selectivity which have classically precluded integration of these reactions in a single conversion step. Swift capture of 1‐olefin Fischer–Tropsch primary products by the molecular hydroformylation catalyst, presumably within the pores of the solid catalyst is key for high alcohol selectivity. The results underscore that controlled cooperation between solid aggregate and soluble molecular metal catalysts, which pertain to traditionally dichotomic realms of heterogeneous and homogeneous catalysis, is a promising blueprint toward selective conversion processes.
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Affiliation(s)
- Kai Jeske
- Department for Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Thorsten Rösler
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Maurice Belleflamme
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Tania Rodenas
- ITQ Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Nico Fischer
- Catalysis Institute and DSI-NRF Centre of Excellence in Catalysis c✶change, Department of Chemical Engineering, University of Cape Town, Cape Town, Rondebosch, 7701, South Africa
| | - Michael Claeys
- Catalysis Institute and DSI-NRF Centre of Excellence in Catalysis c✶change, Department of Chemical Engineering, University of Cape Town, Cape Town, Rondebosch, 7701, South Africa
| | - Walter Leitner
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany.,Institut für Technische und Makromolekulare Chemie RWTH Aachen, Worringerweg 2, 52074, Aachen, Germany
| | - Andreas J Vorholt
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Gonzalo Prieto
- Department for Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany.,ITQ Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain
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3
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Jeske K, Rösler T, Belleflamme M, Rodenas T, Fischer N, Claeys M, Leitner W, Vorholt AJ, Prieto G. Direct Conversion of Syngas to Higher Alcohols via Tandem Integration of Fischer–Tropsch Synthesis and Reductive Hydroformylation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Kai Jeske
- Department for Heterogeneous Catalysis Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Thorsten Rösler
- Max Planck Institute for Chemical Energy Conversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Maurice Belleflamme
- Max Planck Institute for Chemical Energy Conversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Tania Rodenas
- ITQ Instituto de Tecnología Química Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC) Avenida de los Naranjos s/n 46022 Valencia Spain
| | - Nico Fischer
- Catalysis Institute and DSI-NRF Centre of Excellence in Catalysis c✶change Department of Chemical Engineering University of Cape Town Cape Town, Rondebosch 7701 South Africa
| | - Michael Claeys
- Catalysis Institute and DSI-NRF Centre of Excellence in Catalysis c✶change Department of Chemical Engineering University of Cape Town Cape Town, Rondebosch 7701 South Africa
| | - Walter Leitner
- Max Planck Institute for Chemical Energy Conversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
- Institut für Technische und Makromolekulare Chemie RWTH Aachen Worringerweg 2 52074 Aachen Germany
| | - Andreas J. Vorholt
- Max Planck Institute for Chemical Energy Conversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Gonzalo Prieto
- Department for Heterogeneous Catalysis Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
- ITQ Instituto de Tecnología Química Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC) Avenida de los Naranjos s/n 46022 Valencia Spain
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The Formation of Mn-Ce Oxide Catalysts for CO Oxidation by Oxalate Route: The Role of Manganese Content. NANOMATERIALS 2021; 11:nano11040988. [PMID: 33921273 PMCID: PMC8070498 DOI: 10.3390/nano11040988] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/02/2021] [Accepted: 04/07/2021] [Indexed: 11/17/2022]
Abstract
The Mn-Ce oxide catalysts active in the oxidation of CO were studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), transition electron microscopy (TEM), energy dispersive X-Ray (EDX), and a differential dissolution technique. The Mn-Ce catalysts were prepared by thermal decomposition of oxalates by varying the Mn:Ce ratio. The nanocrystalline oxides with a fluorite structure and particle sizes of 4–6 nm were formed. The introduction of manganese led to a reduction of the oxide particle size, a decrease in the surface area, and the formation of a MnyCe1−yO2−δ solid solution. An increase in the manganese content resulted in the formation of manganese oxides such as Mn2O3, Mn3O4, and Mn5O8. The catalytic activity as a function of the manganese content had a volcano-like shape. The best catalytic performance was exhibited by the catalyst containing ca. 50 at.% Mn due to the high specific surface area, the formation of the solid solution, and the maximum content of the solid solution.
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