Article
Chemistry, Applied
Paola Riani, Gabriella Garbarino, Tullio Cavattoni, Guido Busca
Summary: Two Co/SiO2 catalysts exhibit different catalytic behaviors in CO2 methanation and reverse water gas shift reactions, with carbon nanotubes produced not affecting the catalyst activity.
Article
Chemistry, Physical
Giovanni Pampararo, Gabriella Garbarino, Paola Riani, Maria Villa Garcia, Vicente Sanchez Escribano, Guido Busca
APPLIED CATALYSIS A-GENERAL
(2020)
Article
Energy & Fuels
Gabriella Garbarino, Giovanni Pampararo, Thanh Khoa Phung, Paola Riani, Guido Busca
Article
Energy & Fuels
Gabriella Garbarino, Federico Pugliese, Tullio Cavattoni, Guido Busca, Paola Costamagna
Article
Chemistry, Applied
Gabriella Garbarino, Thanh Khoa Phung, Giovanni Pampararo, Paola Riani, Guido Busca
Summary: Moderate addition of silica selectively influences the surface of alumina and modifies its dispersing properties, affecting the catalytic performance of the supported materials.
Article
Chemistry, Physical
Paola Riani, Ioannis Valsamakis, Tullio Cavattoni, Vicente Sanchez Escribano, Guido Busca, Gabriella Garbarino
Summary: Ni-based catalysts with enhanced thermal stability and catalytic performance for CO2 methanation have been synthesized, and it was found that La2O3 plays a promoting role in the reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Chemical
Gabriella Garbarino, Pawel Kowalik, Paola Riani, Katarzyna Antoniak-Jurak, Piotr Pieta, Agnieszka Lewalska-Graczyk, Wojciech Lisowski, Robert Nowakowski, Guido Busca, Izabela S. Pieta
Summary: CO2 methanation is a promising technology for producing alternative fuels using greenhouse gases. Researchers are focusing on optimizing catalysts for operation at low temperatures, with a new catalyst showing high activity and methane yield in the CO2 hydrogenation reaction, possibly due to the formation of Ni-V solid solution alloy nanoparticles.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Review
Energy & Fuels
Guido Busca
Summary: This article summarizes the properties, applications, and industrial processes for the main monocyclic aromatic hydrocarbons, as well as potential ways for their production from renewable sources using thermo-catalytic processes. The future of industrial organic chemistry in relation to the production of high-octane bio-gasolines and monocyclic aromatic hydrocarbons as renewable chemical intermediates is also discussed.
Article
Biotechnology & Applied Microbiology
Giovanni Pampararo, Gabriella Garbarino, Niccolo Ardoino, Paola Riani, Guido Busca
Summary: This paper investigates the use of pure and silica-supported molybdenum oxide (MoO3) catalysts for the production of acetaldehyde through ethanol oxidative dehydrogenation. Different preparation methods were used to prepare the samples, which were extensively characterized for their structural, morphological, and chemical properties. The acidity of the catalysts was found to limit the yield of acetaldehyde, with a high yield of approximately 60% achieved. Additionally, molybdenum loss through volatilization was observed, and slight deactivation of the catalysts was noted and investigated.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Giovanni Pampararo, Gabriella Garbarino, Niccolo Ardoino, Paola Riani, Guido Busca
Summary: The study revealed that silica-doped alumina catalysts have a positive effect on the ethanol oxidative dehydrogenation reaction, resulting in high yields of acetaldehyde. The addition of silica improves the conversion rate of ethanol and selectivity to acetaldehyde, while also reducing MoO3 volatilization.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Energy & Fuels
Matteo Borella, Alessandro A. Casazza, Gabriella Garbarino, Paola Riani, Guido Busca
Summary: The thermal degradation pyrolysis of Kraft lignin was investigated at different temperatures in the absence of catalysts. The high sulfur content in the lignin led to the formation of sulfur-containing compounds in the pyrolysis products. The pyrolytic gas was found to be rich in methane, carbon monoxide, carbon dioxide, and hydrogen sulfide, along with other sulfur compounds in smaller amounts. The bio-oil obtained from the pyrolysis contained alkyl-alkoxy phenols, dihydroxy benzenes, and minor amounts of hydrocarbons and sulfur compounds.
Article
Energy & Fuels
J. A. Cecilia, E. Vilarrasa-Garcia, R. Morales-Ospino, E. Finocchio, G. Busca, K. Sapag, J. Villarroel-Rocha, M. Bastos-Neto, D. C. S. Azevedo, E. Rodriguez-Castellon
Summary: This study focuses on the separation of CO2 from emissions using low-cost adsorbents. Zeolite 4A was successfully synthesized from natural kaolinite under specific conditions, showing similar properties to commercial 4A zeolite. The research aims to optimize the synthesis process to enhance CO2 adsorption capacity.
Article
Engineering, Chemical
Giovanni Pampararo, Gabriella Garbarino, Antonio Comite, Guido Busca, Paola Riani
Summary: CuO-ZnAl2O4 based catalysts were tested for selective dehydrogenation of ethanol to acetaldehyde. Different preparation procedures were adopted, and a novel Cu-SSC catalyst showed high yield and selectivity. The catalysts can be efficiently pre-reduced in the reactant mixture and have a long deactivation time.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Applied
Gabriella Garbarino, Giovanni Pampararo, Elisabetta Finocchio, Guido Busca, Antonella Gervasini, Sebastiano Campisi, Brigida Silvestri, Claudio Imparato, Antonio Aronne
Summary: Amorphous catalytic materials belonging to the Nb2O5-P2O5-SiO2 system were prepared through a sustainable sol-gel procedure, exhibiting strong acidity and good selectivity in ethanol conversion but with the generation of by-products at high temperature and conversion.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Review
Engineering, Environmental
Thanh Khoa Phung, Thong Le Minh Pham, Khanh B. Vu, Guido Busca
Summary: Propylene production has received attention due to its applications and avoiding oil dependence. Various processes have been developed for propylene production, with a focus on utilizing ZSM-5 for biopropylene production. The physicochemical properties of ZSM-5 as an efficient catalyst and potential parameters for controlling bioethanol dehydration into propylene have been discussed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.
