Article
Engineering, Environmental
Qi Yang, Xiaoxiong Huang, Jiaqi Zhang, Zhichang Xiao, Xiaoguang Duan, Shanke Zhou, Yue Niu, Hongqi Sun, Linjie Zhi, Shaobin Wang
Summary: In this study, we developed an edge-rich carbon nanotube/nanoribbon hybrid catalyst for the oxidative dehydrogenation of ethanol to acetaldehyde. The catalytic activity was significantly enhanced by the edge-rich structure and nitrogen doping, leading to a high ethanol conversion rate.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Yuxue Chang, Guang Li, Kang Li, Na Li, Yulong Zhang
Summary: Compared with steam cracking, the application of oxidative dehydrogenation of isobutane to produce isobutene is limited by the capital intensive air separation needed to provide O2. To tackle this problem, a chemical looping oxidative dehydrogenation strategy is proposed, in which the oxygen carrier provides lattice oxygen. By doping Zn, V, and Mg to regulate the electronic structure and metal-oxygen bond strength, a Mo-based oxygen carrier, Mg0.2Zn0.8Mo0.45V0.55Ox, is found to have superior performance in terms of isobutane conversion and isobutene selectivity compared to other oxygen carriers. This study provides important insights for the design and optimization of oxygen carriers by regulating electronic structure and metal-oxygen bond strength.
Article
Chemistry, Physical
Fang Jin, Xiaojie Cheng, Tianyu Wan, Jianhong Gong, Tingyu Liang, Guiying Wu
Summary: Oxidative dehydrogenation and chemical looping oxidative dehydrogenation methods were studied to break through the thermodynamic reaction limitation of ethane dehydrogenation to ethylene, utilizing LaMnO3 perovskite catalysts. The catalyst, prepared using citric acid-nitrate combustion, exhibited good activity and stability in the reactions.
CATALYSIS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Aswathy Thareparambil Venugopalan, Prabu Kandasamy, Nikitra Nihalchand Gupta, Raja Thirumalaiswamy
Summary: The study investigates the catalytic non-oxidative dehydrogenation of isobutane over iron-doped catalysts, with a focus on the significant role of iron doping in controlling isobutene selectivity. Promoted catalysts showed differences in isobutane conversion, with the silver promoted catalyst exhibiting slightly higher isobutene yield due to its optimal catalytic properties. The stability of the catalyst, despite minor issues like coke deposition and particle agglomeration, was observed to be considerable.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Sadia Afrin, Praveen Bollini
Summary: Quantitative analyses of four sets of aerobic/anaerobic ethanol conversion transients reveal the evolution of a high-surface-area cerium oxide surface that catalyzes nonoxidative ethanol dehydrogenation upon complete surface reduction. Aerobic-anaerobic switches lead to new steady state dehydrogenation rates, with termination of oxygen imbalances and induction periods in anaerobic experiments pointing to ethanol dehydrogenation turnovers originating from surface reduction. High vacancy densities obtained from analysis of oxygen imbalances indicate the catalytic origin of acetaldehyde during aerobic-anaerobic switches and anaerobic induction periods.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Xueyu Cao, Xinyu Wu, Yong Liu, Haojie Geng, Siyu Yu, Shetian Liu
Summary: The study presents a new strategy of using heteroatom co-doped carbon-based catalysts with improved activity for ODHE at lower temperatures. BXCN exhibited higher catalytic performance compared to other carbon catalysts reported in literature for ODHE.
Review
Chemistry, Multidisciplinary
Chunyi Li, Guowei Wang
Summary: Researchers are working on improving the catalysts and reactors for light alkane dehydrogenation to mono-olefins to address the high cost of Pt catalysts and potential environmental issues with CrOx, exploring new non-noble metal and environment-friendly catalysts. Additionally, reducing operation pressure can decrease the energy consumption of the entire process.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Weijie Liu, Tianlong Cao, Xueya Dai, Yunli Bai, Xingyu Lu, Fan Li, Wei Qi
Summary: Developing renewable nanocarbon materials to replace conventional precious metal catalysts in alkane dehydrogenation reactions is crucial. A new synthetic route was designed in this study to fabricate nitrogen-doped graphene-based monolith catalysts for oxidative dehydrogenation of propane, showing enhanced catalytic performance.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Katarzyna Morawa Eblagon, Natalia Rey-Raap, Jose Luis Figueiredo, M. Fernando R. Pereira
Summary: The study focused on investigating the impact of texture and surface chemistry of N-CX on their electrochemical performance as metal-free electrocatalysts for ORR, revealing that the presence of oxygen species enhances the ORR performance of these materials.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Ruijie Li, Zhipeng Shen, Haoyu Zheng, Lu Jin, Yonggang Zhang, Weiyong Yuan, Xuefei Wang
Summary: The translation describes the preparation and properties of nitrogen and oxygen co-doped porous carbon materials, which exhibit high mass-specific capacitance, excellent rate capability, cyclic stability, and high energy density. These porous carbon materials are crucial for energy storage and have potential applications in various fields.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Zhankai Liu, Bing Yan, Shengyan Meng, Rui Liu, Wen-Duo Lu, Jian Sheng, Yanhui Yi, An-Hui Lu
Summary: The study found that N2-treated hexagonal boron nitride showed remarkable activity with good selectivity towards propane, while O2 treatment led to sintering effect of BOx species which suppressed the catalytic performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Environmental Sciences
A. Barranco-Lopez, A. I. Moral-Rodriguez, E. Fajardo-Puerto, A. Elmouwahidi, E. Bailon-Garcia
Summary: Fe-doped carbon xerogels with highly developed graphitic structure were synthesized as dual-functional electro-Fenton catalysts for wastewater decontamination. The amount of Fe influenced the textural properties, conductivity, O2-catalyst interaction, and H2O2 selectivity. Fe presence improved electro-catalytic activity, with a mechanism change observed in highly Fe-doped samples. The Electro-Fenton degradation of tetracycline showed high efficiency without external Fenton-catalysts.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Applied
Ming Li, Yunfei Gao, Kun Zhao, Haibin Li, Fang He, Pengmei Lv, Zhen Huang
Summary: The study investigated the use of Mg-doped LSFC as a catalyst for chemical looping oxidative dehydrogenation, which significantly increased ethylene selectivity and achieved high ethylene selectivity and ethane conversion rates. XPS and X-ray diffraction characterizations revealed that surface-absorbed peroxide played a critical role in selective ethane CL-ODH.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yu-peng Tian, Xin-mei Liu, Wen-shuo Ma, Shu-xing Cheng, Long-li Zhang
Summary: This study introduces a method to prepare high-efficiency vanadium-based catalysts, which exhibit enhanced dehydrogenation activity and ideal strength and stability of acid-base pairs. This research is of great significance for improving the industrial application of vanadium-based dehydrogenation catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yang Liu, Hongchuan Jiang, Xiaohui Zhao, Baorui Liu, Zhouxia Jia, Xiao Liang, Xinwu Deng, Wanli Zhang
Summary: This study discusses in detail the effects of nitrogen doping and oxygen vacancies on thermoelectric properties of Pt/N-doped ITO thin film thermocouples based on thermodynamics and kinetics using first-principles and experiments. The atomic structure and bonding characteristics of ITO and N-doped ITO were investigated through X-ray diffraction and X-ray photoelectron spectroscopy. The results show that nitrogen doping enhances charge transfer and affects the bonding states, requiring higher activation energy for repairing oxygen vacancies in N-doped ITO. The study further discusses the impact of band structure, carrier concentration, and carrier effective mass on the Seebeck coefficients of ITO and N-doped ITO. Pt/ITO and Pt/N-doped ITO thin film thermocouples were fabricated and their thermoelectric stability was verified, with the calibration results showing higher stability for N-doped ITO compared to ITO.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Environmental Sciences
A. Sofia G. G. Santos, Joao Restivo, Carla A. Orge, M. Fernando R. Pereira, O. Salome G. P. Soares
Summary: In recent years, mechano-chemically modified carbon nanotubes have been widely used in catalysis, but their compatibility with traditional coating methods is limited. This study proposes a novel method for coating macro-structured catalysts with pre-modified monometallic CNT catalysts, using a solution of surfactant to achieve catalyst-binding. The activity of the prepared catalysts is influenced by factors such as metallic dispersion, surfactant coverage, and distribution of the palladium throughout the catalytic layer.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Chemistry, Applied
Ouissal Assila, Oscar Barros, Antonio M. F. Fonseca, Pier Parpot, Olivia S. G. P. Soares, Manuel F. R. Pereira, Farid Zerrouq, Abdelhak Kherbeche, Elizabetta Rombi, Teresa Tavares, Isabel C. Neves
Summary: The effect of different parameters on the degradation of pollutants in water by Fenton-like oxidation was studied using the Box-Behnken design. Three bimetallic catalysts were prepared and used for Fenton-like oxidation of organic pollutants in water. The optimal catalytic conditions were found to be a temperature of 40 degrees C and an H2O2 concentration of 90 mM, resulting in high conversion rates for Tar and Caf.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Marta O. O. Barbosa, Nuno Ratola, Vera Homem, M. Fernando R. Pereira, Adrian M. T. Silva, Ana R. L. Ribeiro, Marta Llorca, Marinella Farre
Summary: Eighteen PFASs were studied in surface waters of four river basins in Portugal. All sampling sites showed contamination in at least one season. The most frequent PFASs varied between dry and wet seasons. PFOS and PFOA were the most frequent in dry season, while PFOA and PFBS were the most frequent in wet season. The potential environmental risks of PFASs were evaluated based on risk quotient (RQ), showing generally low risk except for PFTeA which posed high risks for fish and daphnids.
Article
Chemistry, Physical
Rui S. Ribeiro, Ana Luisa S. Vieira, Krzysztof Biernacki, Alexandre L. Magalhaes, Juan J. Delgado, Rafael G. Morais, Natalia Rey-Raap, Raquel P. Rocha, M. Fernando R. Pereira
Summary: Hollow carbon spheres (CSs) were synthesized with stable single-atom Fe-N species as alternatives to noble metals-based electrocatalysts for oxygen reduction reaction (ORR). The CSs were finely tuned through a synthesis methodology requiring only earth-abundant metal precursors. Single-atom Fe-N active sites were introduced on the CSs, resulting in a significant enhancement in ORR activity. Advanced characterization and molecular simulation studies revealed the crucial role of nitrogen in anchoring individual iron atoms and modulating the charge density nearby the active sites.
Article
Environmental Sciences
C. A. L. Graca, R. Zema, C. A. Orge, J. Restivo, J. Sousa, M. F. R. Pereira, O. S. G. P. Soares
Summary: The occurrence of emerging pollutants in wastewater treatment plants hinders their reutilization, which calls for effective removal methods without compromising water quality. Ozonation has been explored, but limitations exist towards oxidant-resistant pollutants. The use of carbon catalysts, such as activated carbons, provides an environmentally attractive option. In this study, the catalytic ozonation of salicylic acid was tested using different activated carbons, and the thermal treatment under H2 increased catalytic activity. The best-performing activated carbon showed resistance to ozone and ability to convert ozone into more reactive species.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Ewelina Kusiak-Nejman, Katarzyna Cmielewska, Iwona Pelech, Ewa Ekiert, Piotr Staciwa, Daniel Sibera, Agnieszka Wanag, Joanna Kapica-Kozar, Marcin Gano, Urszula Narkiewicz, Antoni W. Morawski
Summary: This study presents new photocatalysts obtained by treating carbon spheres and TiO2 in a microwave reactor at high pressure and temperature, and depositing them on glass fibre cloths. These photocatalysts showed high CO2-adsorption and photoactivity in simultaneous water-splitting process, generating H-2, reducing CO2 to CO and CH2, and reducing N-2 to NH3. The addition of carbon spheres maintained a high selectivity of nitrogen fixation.
Article
Chemistry, Physical
Iwona Pelech, Daniel Sibera, Piotr Staciwa, Konrad S. Sobczuk, Urszula Narkiewicz
Summary: Composites of iron(III) citrate and carbon spheres activated with potassium compounds were synthesized and characterized using XRD, SEM, and low-temperature nitrogen adsorption methods. The adsorption properties of the composites towards carbon dioxide were evaluated for potential application as photocatalysts for CO2 reduction. The impact of preparation conditions on the structural and adsorption properties of the material was investigated. The material shows great potential due to the synergistic effect between the high adsorption capacity of carbon spheres and the catalytic properties of iron particles.
Article
Chemistry, Multidisciplinary
Sara Abreu, Nuno Vale, Olivia Salome G. P. Soares
Summary: Due to the increase in new types of cancer cells and resistance to drugs, nanotechnology is being applied to biomedical areas as an alternative cancer treatment to minimize side effects and drug resistance and improve treatment efficacy. This study focused on finding a promising cancer treatment for colorectal adenocarcinoma cells using carbon nanotubes (CNTs) combined with different drugs (5-fluorouracil (5-FU) and repurposing drugs tacrine (TAC) and ethionamide (ETA)). CNT samples with different functional groups and textural properties were prepared and characterized, and the results showed that CNTs doped with nitrogen and sulfur groups (CNT-BM-N and CNT-H2SO4-BM) improved the activity of 5-FU and TAC.
Article
Chemistry, Multidisciplinary
Rita Teixeira-Santos, Luciana C. Gomes, Rita Vieira, Francisca Sousa-Cardoso, Olivia S. G. P. Soares, Filipe J. Mergulhao
Summary: Graphene nanoplatelet (GNP)-based composites as coatings for urinary catheters (UCs) were investigated for their antibiofilm efficacy. The composite showed inhibitory effects on the development of biofilms of various bacteria, and influenced the structure of the biofilm. Moreover, the functionalized GNP caused changes in membrane permeability and triggered reactive oxygen species synthesis in Staphylococcus aureus, whereas in Gram-negative bacteria, it only induced changes in cell metabolism. This suggests the potential of GNP-based composites as coatings for UCs.
Article
Materials Science, Multidisciplinary
Samuel Belo, Francisca Sousa-Cardoso, Rita Teixeira-Santos, Luciana C. Gomes, Rita Vieira, Jelmer Sjollema, Olivia S. G. P. Soares, Filipe J. Mergulhao
Summary: This study evaluated the performance of graphene oxide (GO)/polydimethylsiloxane (PDMS) composites against Staphylococcus aureus and Pseudomonas aeruginosa biofilms. The results showed that the 1% GO/PDMS composite had a good inhibitory effect on S. aureus biofilm formation, while it had no significant effect on P. aeruginosa. GO increased the membrane permeability, metabolic activity, and endogenous reactive oxygen species synthesis in S. aureus.
Article
Engineering, Chemical
Ana Sofia G. G. Santos, Joao Restivo, Carla Alexandra Orge, Manuel Fernando R. Pereira, Olivia Salome G. P. Soares
Summary: In this study, the behavior of Pd-Cu macrostructured catalysts in the nitrate catalytic reduction reaction was investigated. The results revealed that catalyst loading and inlet flow rate were the most significant parameters affecting the conversion and selectivity. Higher catalyst loading and lower inlet flow rates allow for longer contact time between the phases, leading to improved catalytic results.
Article
Chemistry, Physical
Ana Rita Querido, Liliana P. L. Goncalves, Yury V. V. Kolen'ko, M. Fernando R. Pereira, O. Salome G. P. Soares
Summary: The reverse water-gas shift reaction (RWGS) is crucial for converting CO2 to CO, which is used for the production of various chemicals and synthetic fuels. In this study, Cu-based catalysts supported on pristine CNTs and composites of pristine and functionalized CNTs : ZnO were prepared to enhance the efficiency of RWGS catalysts. The presence of ZnO in the catalyst structure proved to be beneficial, resulting in a higher CO2 conversion and CO yield compared to catalysts supported on pristine CNTs. Additionally, the N-doping of CNTs further improved the CO2 conversion and CO yield, with stability observed for at least 93 hours.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Infectious Diseases
Marisa Gomes, Rita Teixeira-Santos, Luciana C. Gomes, Francisca Sousa-Cardoso, Fabio M. Carvalho, Andreia R. Tome, Olivia S. G. P. Soares, Kathryn A. Whitehead, Filipe J. Mergulhao
Summary: Chemically modified carbon nanotubes incorporated into a PDMS matrix show effective antibacterial activity against biofilms. The antimicrobial activity of the nanotubes can be efficiently tailored through nitric acid functionalization and thermal treatment. The composites exhibit increased antimicrobial activity without surface carboxylic groups, and their redox activity contributes to the enhancement of the antimicrobial properties. The nanomaterials can change the membrane permeability and induce ROS production in bacteria, while remaining biocompatible with human kidney cells.
Article
Chemistry, Physical
Ouissal Assila, Zineb Bencheqroun, Elisabetta Rombi, Teresa Valente, Amalia S. Braga, Hicham Zaitan, Abdelhak Kherbeche, Olivia S. G. P. Soares, Manuel F. R. Pereira, Antonio M. Fonseca, Pier Parpot, Isabel C. Neves
Summary: Three raw clays from Morocco were used as heterogeneous catalysts for Fenton-like oxidation of organic pollutants in water. The results showed that the clays were effective in the degradation of dyes and caffeine, and the clay-modified electrodes also showed good performance in the degradation of dyes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
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.
