Article
Chemistry, Physical
Jorge Cored, Jaime Mazario, Cristina Cerda-Moreno, Pablo G. Lustemberg, M. Veronica Ganduglia-Pirovano, Marcelo E. Domine, Patricia Concepcion
Summary: Enhanced methanol production is achieved by using a specific precursor catalyst, leading to the stabilization of Cu+ ions under reaction conditions, and the importance of monodentate formate species in methanol synthesis is highlighted.
Article
Chemistry, Multidisciplinary
Kristian Stangeland, Fawzi Chamssine, Wenzhao Fu, Zikun Huang, Xuezhi Duan, Zhixin Yu
Summary: Developing effective catalysts for CO2 hydrogenation to methanol is crucial for improving green synthesis of fuels and chemicals. Optimizing Cu dispersion enhances catalytic activity, while the nature of the Cu-ZnO interface also impacts catalytic properties. Using hydrotalcite-derived Cu/ZnO/Al2O3 catalysts can result in enhanced intrinsic activity and methanol selectivity, with the decrease in interfacial area identified as a deactivation mechanism. The addition of In in Cu/ZnO-based catalysts decreases activity but increases methanol selectivity and stabilizes Cu particles and the Zn-Al mixed oxide phase.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Materials Science, Multidisciplinary
Jianyu Wu, Dongsu Bi
Summary: In this study, a novel and affordable one-step procedure was used to engineer a type of layered double hydroxide (LDH), the meta-aluminate intercalated mafic-modified hydrotalcite (LDH-2). The conventional two-step synthesis method (LDH-1) was also synthesized for comparison. After analyzing the nanostructures of the synthesized materials, it was found that LDH-2 exhibited a higher adsorption capacity for bromate remediation compared to LDH-1. Furthermore, LDH-2 showed exceptional durability, maintaining activity after five consecutive cycling runs. This study provides valuable insights into the facile and affordable synthesis of LDH materials.
Article
Chemistry, Physical
James Hayward, Jonathan Ruiz Esquius, Nia Richards, Wilm Jones, Daniel Hewes, Michael Bowker
Summary: Co-precipitation was used to prepare a copper, zinc, and aluminium hydrotalcite-like precursor to make a methanol synthesis catalyst. Treatment with an organic solvent increased the surface area from 22 m2/g to 340 m2/g due to delamination of the sheet-like structure. The calcination and reduction processes did not affect the lamellar morphology, resulting in high Cu0 surface areas (66 m2/g) and high activity in the methanol synthesis reaction.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Ying Liu, Xiaofang Liu, Lin Xia, Chaojie Huang, Zhaoxuan Wu, Hui Wang, Yuhan Sun
Summary: Catalytic hydrogenation of CO2 to methanol is a promising method for mitigating global warming and reducing reliance on fossil fuels. The addition of CO in the reaction can inhibit the reverse water gas shift reaction and improve methanol production. Cu/ZnO/Al2O3 catalysts prepared from different precursors exhibit better activity and long-term stability when CO is incorporated.
ACTA PHYSICO-CHIMICA SINICA
(2022)
Article
Chemistry, Physical
Fan Zhang, Xiaoying Xu, Zhengpu Qiu, Bo Feng, Yuan Liu, Aihua Xing, Maohong Fan
Summary: This study focused on the design and performance of Cu/ZnO/Al2O3 catalysts, finding that the catalyst derived from highly zinc-substituted malachite exhibited the best catalytic performance. The research also revealed the copper specific surface area and exposed copper concentration of the catalyst, as well as the Cu/ZnO synergy.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Physical
Hsin-Kai Huang, Yi-Kai Chih, Wei-Hsin Chen, Cheng-Yu Hsu, Kai-Jhei Lin, Hong -Ping Lin, Chun-Han Hsu
Summary: A green template-free method is proposed for the synthesis of mesoporous Ni-Cu/Al2O4 catalyst, which shows excellent catalytic performance and regeneration capability in methanol steam reforming.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Nicholas S. Sapienza, Kristin N. Knight, Malik Albrahim, Md. Raian Yousuf, Ayman M. Karim, John R. Morris
Summary: By studying the reaction mechanism of methanol oxidation on a Pt/TiO2 catalyst through experiments and surface science techniques, we found that methyl formate is produced under mild reaction conditions and fully combusted to CO2 at higher catalyst temperatures. Surface science experiments revealed that the production of CO2 involves a surface-bound formate intermediate through multiple proton-coupled electron-transfer steps. Importantly, we discovered that water generated during initial methanol adsorption plays a crucial role in unlocking the oxidative chemistry of the Pt-based material. These findings provide valuable insights for modifying catalysts to selectively enhance partial or full oxidation, enabling the production of valuable commodity chemicals.
Article
Chemistry, Physical
Milad Kohi Habibi, Seyed Mahdi Rafiaei, Amir Alhaji, Maryam Zare
Summary: Ce-doped ZnAl2O4: x% Ce particles were synthesized and their properties were studied, showing that the calcination temperature significantly affects microstructures and luminescence characteristics, while the concentration of Ce ions influences photoluminescence behavior intensity.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
Chunsheng Wan, Guanbao Xie, Meng Zhang, Hongyang Huang, Dalin Li, Lilong Jiang
Summary: Divalent/trivalent cobalt hydrotalcite-like compounds (Co2+-Co3+ HTlc) were successfully synthesized via precipitation under mild alkaline conditions using NaOH as precipitant and methanol-water as solvent. The synthetic parameters, such as CH3OH:H2O volume ratio, precipitation pH, and hydrothermal treatment, significantly influenced the formation of HTlc. The presence of methanol increased the concentration of dissolved oxygen and promoted the oxidation of Co2+ into Co3+, leading to the complete transformation of alpha-Co(OH)2 into Co2+-Co3+ HTlc. The developed synthesis process allowed for the efficient and quantitative synthesis of cobalt HTlc.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Applied
Lijie Pei, Jianxin Cao, Fei Liu, Anjie Yang, Mengqin Yao, Tianxiang Zhao, Xiaodan Wang, Sibudjing Kawi
Summary: The catalytic properties of bifunctional ZSM-5@t-ZrO2 catalyst for methanol thiolation were studied. It was found that the acid sites of ZSM-5 and the base sites of t-ZrO2 played important roles in the adsorption and dissociation of methanol and H2S molecules, respectively. Pre-sulfurization improved the initial activity of methanol thiolation, and the special structure of ZSM-5@t-ZrO2 reduced the formation rate of carbon and sulfur deposits.
Article
Engineering, Chemical
Hailin Wang, Run Hao, Meiping Gao, Zhongshen Zhang, Zhengping Hao
Summary: The study developed high temperature SO2 adsorbents with high efficiency and low cost by preparing a series of different compounds. Results showed that addition of Ce, Co significantly increased weak alkalinity sites, and CaO in CaCeAlO exhibited the best SO2 adsorption capacity.
Article
Chemistry, Multidisciplinary
Lifan Qin, Hefa Cheng
Summary: The modification with Ni-Al hydrotalcite improved the activity of Pt/AlOOH, with the nanocomposite of Pt/Ni1Al9 showing remarkable catalytic performance due to larger specific surface area and more surface active sites. The enhanced catalytic activity was attributed to the generation of more surface active oxygen species activated by electron transfer and synergistic effects among different components.
Article
Chemistry, Physical
Roey Ben David, Adva Ben Yaacov, Ashley R. Head, Baran Eren
Summary: In this study, we investigated the adsorption of methanol vapor on low-index Cu surfaces under ambient pressure and temperature conditions using surface-sensitive infrared and X-ray spectroscopy techniques. We found that the first step of methanol decomposition, which involves breaking of the O-H bond and formation of surface-bound methoxy, readily occurs under ambient conditions. Time-lapse IR spectra showed a gradual decrease in methoxy coverage, which did not follow established kinetic models. We attributed the initially high, non-equilibrium coverage of methoxy to a H-bonded methanol assembly in the precursor state. A temperature-dependent equilibrium coverage was achieved as excess methoxy underwent further dehydrogenation to CO and desorbed into the gas phase. The kinetics of this process exhibited a significant structure sensitivity, with faster kinetics observed on the Cu(110) surface compared to Cu(111) and Cu(100) surfaces.
Article
Engineering, Environmental
Yan Li, Ya-Qin Liang, Xiao-Ming Mao, Hui Li
Summary: Adsorption is a promising method for removing heavy metals from contaminated water. In this study, a highly efficient composite absorbent was synthesized using chitosan and ethylenediaminetetraacetate-intercalated Mg-Al hydrotalcite-like compound. The adsorbent had a high specific surface area and various functional groups, allowing for strong complexation with Cu(II). The adsorption capacity was investigated under different conditions, and it was found that the equilibrium was reached within 120 min. The adsorption kinetics and isotherms were well described by mathematical models. The results suggest that this absorbent has potential applications in treating Cu(II) contaminated wastewater.
CHEMICAL ENGINEERING JOURNAL
(2022)
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
Engineering, Chemical
Francesco Conte, Alberto Villa, Laura Prati, Carlo Pirola, Simona Bennici, Gianguido Ramis, Ilenia Rossetti
Summary: The photoreduction of CO2 to valuable chemicals using innovative photoreactors was investigated in this study. By overcoming the low solubility of CO2 in water, the overall productivity was improved. The addition of titania catalysts functionalized with either monometallic or bimetallic cocatalysts resulted in the production of hydrogen, formic acid/formate, formaldehyde, and methanol. The pH of the reaction system influenced the distribution of the products. Moreover, using noble metals as cocatalysts increased the productivity, while using bimetallic cocatalysts reduced the cost of the catalytic material.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Morena Nocchetti, Elisa Boccalon, Monica Pica, Nicoletta Maria Rosaria Giordano, Francesco Finori, Donatella Pietrella, Antonio Cipiciani
Summary: Enhancing the antibacterial activity of old antibiotics by combining antibiotics with silver nanoparticles immobilized on a solid support was investigated in this study. The synergistic antimicrobial effect of LDH containing both silver and antibiotics showed superior antibacterial activity against both gram-positive and gram-negative bacteria in comparison with plain antimicrobials or LDH containing only antibiotics or silver.
Article
Chemistry, Organic
Francesca Mangiavacchi, Giuseppe Mazzeo, Maria Chiara Graziani, Francesca Marini, Jozef Drabowicz, Ewelina Wielgus, Luca Sancineto, Giovanna Longhi, Riccardo Vivani, Sergio Abbate, Claudio Santi
Summary: In this study, the base induced activation of beta-naphthol was utilized for the synthesis of a novel 1,1'-diselanediylbis(naphthalen-2-ol), which was fully characterized using NMR and X-Ray analysis. The reactivity of this compound was investigated, leading to the discovery of a novel synthesis method for chiral selenium containing heterocycles. Chiroptical methods, specifically VCD and ECD, were successfully employed to determine the absolute configuration of these compounds, representing the first example reported for organoselenium derivatives.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Marine Cotte, Victor Gonzalez, Frederik Vanmeert, Letizia Monico, Catherine Dejoie, Manfred Burghammer, Loic Huder, Wout de Nolf, Stuart Fisher, Ida Fazlic, Christelle Chauffeton, Gilles Wallez, Nuria Jimenez, Francesc Albert-Tortosa, Nati Salvado, Elena Possenti, Chiara Colombo, Marta Ghirardello, Daniela Comelli, Ermanno Avranovich Clerici, Riccardo Vivani, Aldo Romani, Claudio Costantino, Koen Janssens, Yoko Taniguchi, Joanne McCarthy, Harald Reichert, Jean Susini
Summary: The European Synchrotron Radiation Facility has upgraded its light source, leading to improved beamline performances. To enhance data acquisition speed, new access modes have been developed. One of these modes guarantees beamtime for 10 European institutes, facilitating applications to cultural heritage.
Article
Chemistry, Physical
Francesco Conte, Veronica Pellegatta, Alessandro Di Michele, Gianguido Ramis, Ilenia Rossetti
Summary: Bare titania and metal-promoted TiO2 catalysts were used for the treatment of nitrates in wastewater, achieving efficient photocatalytic reduction of nitrates under visible light. The performance of the catalysts and the composition of the water matrix had an impact on the conversion of nitrates. Additionally, the photoreduction of nitrates can be combined with the photo-oxidation of ammonium, enabling a new process called Photo-Selective Catalytic Reduction (Photo-SCR) for the treatment of highly polluted wastewater.
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)
Article
Chemistry, Physical
Francesco Conte, Elisa Garcia-Lopez, Giuseppe Marci, Claudia L. M. Bianchi, Gianguido Ramis, Ilenia Rossetti
Summary: The productivity of CO2 photoreduction is increased by using an innovative photocatalytic reactor and various photocatalysts. Composites of TiO2 and C3N4-TE show higher productivity compared to their individual constituents, and high pressure enhances the yield of organic products.
Article
Chemistry, Physical
Raquel Lopez-Asensio, Juan Antonio Cecilia-Buenestado, Concepcion Herrera-Delgado, Maria Angeles Larrubia-Vargas, Cristina Garcia-Sancho, Pedro Jesus Maireles-Torres, Ramon Moreno-Tost
Summary: A family of Mg/Al hydrotalcites was synthesized as precursors for MgAlOx mixed oxides. The mixed oxides showed catalytic activity in the reduction of furfural to furfuryl alcohol using isopropanol as a hydrogen donor. Different catalytic parameters were tested and the adsorption behavior of furfural and isopropanol on the catalyst was analyzed. The results showed that the catalytic performance was influenced by the basicity of the catalysts and deactivation was caused by adsorbed species, mainly furfural-derived compounds.
Article
Chemistry, Multidisciplinary
Anna Donnadio, Geo Paul, Marianna Barbalinardo, Valeria Ambrogi, Gabriele Pettinacci, Tamara Posati, Chiara Bisio, Riccardo Vivani, Morena Nocchetti
Summary: Different amounts of sodium-alendronate (ALN) were loaded into layered zirconium phosphates of alpha and gamma type by topotactic exchange reactions. To extend the exchange process to the interlayer regions, ALN solutions were in contact with exfoliated single sheets of the layered solids. The ALN loading degree was determined and the compounds were characterized. The effect of ZP derivatives on cell proliferation was assessed and showed no decrease after 7 days of incubation.
Article
Plant Sciences
Daniele Schiavi, Riccardo Ronchetti, Veronica Di Lorenzo, Riccardo Vivani, Stefano Giovagnoli, Emidio Camaioni, Giorgio M. Balestra
Summary: Nanotechnology is being used in crop protection with a focus on sustainable nanopesticides and nanocarriers for plant pathogen management. Cellulose nanocrystals (CNC) derived from agrofood waste are emerging as innovative antimicrobial materials. This study evaluated new chemical and enzymatic extraction methods for CNC from tomato harvest residues. Both methods were efficient, with the enzymatic method being greener and producing purer CNC at a slightly lower yield. The obtained CNC showed promising antimicrobial activity against plant bacterial pathogens, suggesting their potential in sustainable crop protection strategies.
Article
Chemistry, Multidisciplinary
Sergio Molina-Ramirez, Marina Cortes-Reyes, Concepcion Herrera, Maria angeles Larrubia, Luis Jose Alemany
Summary: The DeNO(x) activity in a NSR-SCR hybrid system was investigated using two copper-containing chabazite-type zeolitic catalysts, including a Pt-Ba-K/Al2O3 model catalyst for the NSR reaction, and two Cu-CHA zeolites for the SCR reaction. The addition of the SCR system significantly enhanced the NOx conversion, especially at low temperatures, while maintaining high selectivity to N-2. The total reduction in NH3 production and N2O formation in the NSR-SCR configuration compared to the single NSR catalyst was around 2%.
CHEMISTRY-SWITZERLAND
(2023)
Article
Energy & Fuels
Matteo Tommasi, Francesco Conte, Mohammad Imteyaz Alam, Gianguido Ramis, Ilenia Rossetti
Summary: The photocatalytic reduction of CO2 into solar fuel is a promising approach to solve the energy crisis and mitigate environmental pollution. We have developed a simple and scalable method to immobilize TiO2 P25 on glass slides using an organic-based surfactant. This method shows great potential for producing solar fuel.
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.
