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16. Properties, Industrial Applications and Future Perspectives of Catalytic Materials Based on Nickel and Alumina: A Critical Review.

Author

Busca, Guido, Spennati, Elena, Riani, Paola, and Garbarino, Gabriella

Subjects
*NICKEL oxide, *INDUSTRIAL capacity, *ALUMINUM hydroxide, *SURFACE properties, *SURFACES (Technology)
Abstract

The bulk and surface properties of materials based on nickel and aluminum oxides and hydroxides, as such or after reduction processes, are reviewed and discussed critically. The actual and potential industrial applications of these materials, both in reducing conditions and in oxidizing conditions, are summarized. Mechanisms for reactant molecule activation are also discussed. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Critical Aspects of Energetic Transition Technologies and the Roles of Materials Chemistry and Engineering.

Author

Busca, Guido

Subjects
*SUSTAINABLE engineering, *CHEMICAL energy, *INDUSTRIAL chemistry, *CHEMICAL engineering, *CHEMICAL engineers
Abstract

The perspectives of technological advances needed for short term energetic transition are briefly reviewed and discussed critically. In particular, the technologies for the greenhouse gas emission-free production of electrical energy, its storage and transport, the production, transport, storage and use of hydrogen, and the use of biomass derived technologies are shortly and critically reviewed. Critical aspects are emphasized. The role of chemistry, and in particular materials chemistry and engineering, in short-term developments are underlined. [ABSTRACT FROM AUTHOR]

Published
2024
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40. Effect of large d0 cation doping on gamma‐alumina's acid–base and catalytic properties.

Author

Garbarino, Gabriella, Riani, Paola, Comite, Antonio, Finocchio, Elisabetta, and Busca, Guido

Subjects
ETHANOL, INDUSTRIAL chemistry, FOURIER transform infrared spectroscopy, FIELD emission electron microscopy, SURFACE analysis, HETEROGENEOUS catalysts, HETEROGENEOUS catalysis, ACID-base catalysis
Abstract

BACKGROUND: Catalysts based on alumina‐supported metal oxides are of crucial importance in the field of heterogeneous catalysis for several applications requiring tuning of surface acidity. RESULTS: In this work, the effects of K+, Ca2+ and La3+ cation doping have been evaluated on a well‐characterized commercial γ‐Al2O3 through morphological characterization and surface characterization (Brunauer–Emmet–Teller, X‐ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy). The conversion of ethanol as a test reaction was performed over these catalysts. The impregnated oxide species essentially remain at the surface, resulting in the partial poisoning of the strongest alumina Lewis acid sites. Moreover, oxide anions may increase basicity at the surface. The doping results in a significant decrease in catalytic activity in ethanol conversion to diethyl ether and to ethylene, which is shifted at higher temperatures. On the other side, higher activity in the formation of C4 olefins was detected, namely on the K‐doped alumina. CONCLUSION: The partial poisoning of the strongest alumina Lewis acid sites and the presence at the surface of new more basic cation–anion couples result in significant changes in catalytic ethanol conversion. © 2023 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI). [ABSTRACT FROM AUTHOR]

Published
2024
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41. Mechanistic and Compositional Aspects of Industrial Catalysts for Selective CO 2 Hydrogenation Processes.

Author

Busca, Guido, Spennati, Elena, Riani, Paola, and Garbarino, Gabriella

Subjects
*CARBON dioxide, *WATER gas shift reactions, *HYDROGENATION, *CATALYSTS, *SURFACE chemistry, *METHANATION
Abstract

The characteristics of industrial catalysts for conventional water-gas shifts, methanol syntheses, methanation, and Fischer-Tropsch syntheses starting from syngases are reviewed and discussed. The information about catalysts under industrial development for the hydrogenation of captured CO2 is also reported and considered. In particular, the development of catalysts for reverse water-gas shifts, CO2 to methanol, CO2-methanation, and CO2-Fischer-Tropsch is analyzed. The difference between conventional catalysts and those needed for pure CO2 conversion is discussed. The surface chemistry of metals, oxides, and carbides involved in this field, in relation to the adsorption of hydrogen, CO, and CO2, is also briefly reviewed and critically discussed. The mechanistic aspects of the involved reactions and details on catalysts' composition and structure are critically considered and analyzed. [ABSTRACT FROM AUTHOR]

Published
2024
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