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Cheng Y, Tian J, Lin J, Wang S, Xie S, Pei Y, Yan S, Qiao M, Xu H, Zong B. Potassium-promoted magnesium ferrite on 3D porous graphene as highly efficient catalyst for CO hydrogenation to lower olefins. J Catal 2019. [DOI: 10.1016/j.jcat.2019.04.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gallagher JR, Boldrin P, Combes GB, Ozkaya D, Enache DI, Ellis PR, Kelly G, Claridge JB, Rosseinsky MJ. The effect of Mg location on Co-Mg-Ru/γ-Al2O3 Fischer-Tropsch catalysts. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2016; 374:rsta.2015.0087. [PMID: 26755760 PMCID: PMC4707690 DOI: 10.1098/rsta.2015.0087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 11/16/2015] [Indexed: 06/05/2023]
Abstract
The effectiveness of Mg as a promoter of Co-Ru/γ-Al2O3 Fischer-Tropsch catalysts depends on how and when the Mg is added. When the Mg is impregnated into the support before the Co and Ru addition, some Mg is incorporated into the support in the form of MgxAl2O3+x if the material is calcined at 550°C or 800°C after the impregnation, while the remainder is present as amorphous MgO/MgCO3 phases. After subsequent Co-Ru impregnation MgxCo3-xO4 is formed which decomposes on reduction, leading to Co(0) particles intimately mixed with Mg, as shown by high-resolution transmission electron microscopy. The process of impregnating Co into an Mg-modified support results in dissolution of the amorphous Mg, and it is this Mg which is then incorporated into MgxCo3-xO4. Acid washing or higher temperature calcination after Mg impregnation can remove most of this amorphous Mg, resulting in lower values of x in MgxCo3-xO4. Catalytic testing of these materials reveals that Mg incorporation into the Co oxide phase is severely detrimental to the site-time yield, while Mg incorporation into the support may provide some enhancement of activity at high temperature.
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Affiliation(s)
- James R Gallagher
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK
| | - Paul Boldrin
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK
| | - Gary B Combes
- Johnson Matthey PLC, PO Box 1, Belasis Avenue, Billingham TS23 1LB, UK
| | - Don Ozkaya
- Johnson Matthey PLC, Blount's Court, Sonning Common, Reading RG4 9NH, UK
| | - Dan I Enache
- Johnson Matthey PLC, Blount's Court, Sonning Common, Reading RG4 9NH, UK
| | - Peter R Ellis
- Johnson Matthey PLC, Blount's Court, Sonning Common, Reading RG4 9NH, UK
| | - Gordon Kelly
- Johnson Matthey PLC, PO Box 1, Belasis Avenue, Billingham TS23 1LB, UK
| | - John B Claridge
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK
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Trends in research and development of coal conversion to liquid fuels and basic chemicals in Europe. PURE APPL CHEM 1979. [DOI: 10.1351/pac197951112225] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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