Article
Chemistry, Physical
O. V. Klimov, K. A. Nadeina, S. V. Budukva, E. A. Avdeenko, S. V. Cherepanova, Yu. A. Chesalov, E. Yu. Gerasimov, I. P. Prosvirin, A. S. Noskov
Summary: Oxidative regeneration and treatment with citric acid can effectively reactivate deactivated catalyst and enhance its activity in hydrotreatment reactions. Water treatment can remove soluble Ni and Mo compounds and form a phosphate monolayer.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Jihyun Kim, Yong-Kul Lee
Summary: NiMoS and CoMoS catalysts were synthesized and applied to the hydrotreating (HDT) of FCC light cycle oils (FCC-LCO) at 613 K and 8.6 MPa H-2. The individual and competitive reactivities of sulfur (S) and nitrogen (N) compounds in the HDS and HDN reactions were investigated using S and N model compounds. The NiMoS catalyst showed better activity in the HDN of LCO and HDS of LCO compared to the CoMoS catalyst.
Article
Chemistry, Physical
Gwang-Nam Yun, Ki-Duk Kim, Yong-Kul Lee
Summary: A highly dispersed nickel phosphide catalyst supported on SBA-15 was prepared and tested for the hydrotreating of tire pyrolysis oil. The catalyst showed high HDS and HDN conversion rates, comparable to a commercial NiMoS catalyst under the same conditions, indicating its potential for use in industrial applications.
Article
Energy & Fuels
Wenkai Wei, Xinyue Zhang, Xuandong Liu, Rong Guo, Bo Meng, Guosheng Li, Shenyong Ren, Qiaoxia Guo, Baojian Shen
Summary: By regulating the Bronsted acid sites on supports, the activity of supported Fe catalysts in hydrodesulfurization can be enhanced, leading to improved dispersion of active metal species and catalytic activity. Additionally, the presence of an appropriate B acid site density can reduce support and metal site interactions, lower reduction temperature, and promote sulfidation of the catalysts. Furthermore, catalysts with B acid sites can improve product selectivity by facilitating direct desulfurization and isomerization routes during HDS.
Article
Chemistry, Physical
Hasan Komurcu, Kadir Yilmaz, Savas Gurdal, Muzaffer Yasar
Summary: This study investigated the hydrotreating of kerosene to obtain refined products suitable for marketing as kerosene and rocket grade fuel. Hydrogenation experiments were conducted using different amounts of crude kerosene and silica-supported nickel and kieselguhr supported nickel-sulfur catalysts. The catalysts were analyzed using various techniques, and the obtained samples were examined for aromatic fractions and paraffin structures content. The experiments showed a reduction in aromatic hydrogen structures in crude kerosene and an increase in the total H/C ratio of rocket grade hydrocarbon fuels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Francisco Jose Morales-Leal, Jorge Ancheyta, Pablo Torres-Mancera, Fernando Alonso
Summary: The article provides a comprehensive review of scientific literature on the factors that accelerate deactivation of hydrotreating catalysts. Experimental methodologies used at laboratory and pilot plant scales to achieve accelerated deactivation are discussed. These methodologies aim to replicate the long-term deactivation of catalysts in industrial settings by using different operating conditions or feedstock with high content of coke and metal deposition-causing compounds in short-term experiments.
Article
Chemistry, Physical
Mengyan Li, Johannes Ihli, Marcel A. Verheijen, Mirko Holler, Manuel Guizar-Sicairos, Jeroen A. van Bokhoven, Emiel J. M. Hensen, Thomas Weber
Summary: Preparation conditions have a significant impact on the structure and performance of alumina-supported catalysts for hydrodesulfurization (HDS). Factors such as precursor structure, metal-support interactions, and sulfidation processes contribute to the observed differences in HDS activity between catalyst samples. The choice of different chemical sources for preparation leads to variations in precursor structure and reducibility, affecting the formation of active species and ultimately the catalytic performance in HDS reactions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Mengyan Li, Johannes Ihli, Marcel A. Verheijen, Mirko Holler, Manuel Guizar-Sicairos, Jeroen A. van Bokhoven, Emiel J. M. Hensen, Thomas Weber
Summary: Preparation conditions have a significant impact on the structure and performance of alumina-supported hydrodesulfurization catalysts. The study found that catalyst samples prepared from different chemical sources exhibited notable differences in structure and activity, with sample B showing higher activity than sample A, and these differences can be attributed to the structural variations caused by the different preparation conditions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Engineering, Chemical
Ayaz Ali Shah, Kamaldeep Sharma, Muhammad Salman Haider, Saqib Sohail Toor, Lasse Aistrup Rosendahl, Thomas Helmer Pedersen, Daniele Castello
Summary: Hydrothermal liquefaction (HTL) is a leading technology for converting various types of biomass into drop-in biofuels and renewable materials. Catalysis plays a crucial role in increasing product yields and improving product properties. This review provides an updated overview of catalysis strategies applied in HTL, comparing different catalysts and their effects on product yields and properties. The advantages and disadvantages of each catalysis approach are critically discussed, along with future research directions.
Article
Energy & Fuels
K. A. Nadeina, Yu V. Vatutina, P. P. Mukhacheva, V Krestyaninova, A. Saiko, E. S. Bykova, T. S. Romanova, O. Klimov, V. V. Danilevich, A. S. Noskov
Summary: The influence of catalyst order and their ratio on FCC feedstock hydrotreatment was investigated, with NiMo/Al2O3 catalyst showing the highest activity. The best results were achieved when the feedstock was treated first by NiMo/Al2O3 and then by CoMo/Al2O3, with a ratio of 40/60 vol% in the reactor.
Article
Chemistry, Physical
Zhusong Xu, Qiang Wei, Luyuan Zhao, Huanqi Kang, Haoze Wang, Xiaodong Liu, Yasong Zhou, Wenbing Huang
Summary: This article presents a method of preparing highly active HDT catalysts using a surfactant-dispersed W precursor. The method achieves the formation of highly dispersed active phases by controlling the structure and surface states of the precursor, thereby enhancing the activity of hydrotreating. Furthermore, the study explores the role of surfactants in controlling the metal-support interaction and the morphology of active phases.
JOURNAL OF CATALYSIS
(2022)
Article
Energy & Fuels
Tiebin Liu, Peiliang Sun, Huihong Zhu, Tao Yang, Bingtao Tang, Chong Peng
Summary: Two NiMo/Al2O3 catalysts with different acid-base properties were prepared and their effects on FCC diesel hydrotreating and desulfurization performance were investigated. The results showed that the surface structural differences affected the interaction between metals and oxygen atoms, leading to differences in catalytic activity. The catalyst with more active phases exhibited better desulfurization and denitrification performance, while the catalyst with higher sulfidation degree showed better hydrotreating performance. The findings provide insights for improving the performance of catalysts used in refinery processes.
Article
Chemistry, Applied
V. V. Danilevich, K. A. Nadeina, E. Yu Gerasimov, K. Shefer, O. Klimov, A. S. Noskov
Summary: This study demonstrates that the addition of lanthanum to the synthesis of aluminum hydroxide can increase the content of pseudoboehmite, while reducing the amount of amorphous component. Lanthanum is uniformly distributed on the surface of aluminum hydroxide as isolated cations. Additionally, the modification with lanthanum increases the specific surface area of alumina without affecting the pore volume. The presence of lanthanum also lowers the temperature required to reduce the sulfur content in hydrotreated diesel fuel.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Ricardo Garcia de Castro, Elodie Devers, Mathieu Digne, Anne-Felicie Lamic-Humblot, Gerhard D. Pirngruber, Xavier Carrier
Summary: The study investigates the surface-dependent genesis of supported transition metal sulfide catalysts on single crystals, revealing the impact of metal-support interactions and providing theoretical support for the improvement of hydrotreating catalysts.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Applied
Kaixuan Yang, Xiao Chen, Zongxuan Bai, Changhai Liang
Summary: This study successfully prepared a series of intermetallic noble metal silicides supported by carbon nanotubes catalysts using chemical vapor deposition, which showed high efficiency and long-term stability in sulfur removal, especially with excellent stability for 4,6-DMDBT. These sulfur-tolerant noble metal silicides have the potential to be promising catalysts for the ultra-deep HDS of fossil fuel.
Article
Chemistry, Physical
Arina R. Potylitsyna, Yuliya V. Rudneva, Yury I. Bauman, Pavel E. Plyusnin, Vladimir O. Stoyanovskii, Evgeny Y. Gerasimov, Aleksey A. Vedyagin, Yury V. Shubin, Ilya V. Mishakov
Summary: The catalytic utilization of chlorine-organic wastes is important for ecological reasons. This study focused on the catalytic decomposition of trichloroethylene over 100Ni and 96Ni-4W catalysts, resulting in the formation of carbon nanofibers. The optimal activity of the catalysts was observed at specific temperature ranges, and the 96Ni-4W catalyst showed better longevity compared to pure Ni catalyst.
Article
Chemistry, Physical
Lyubov Isupova, Evgeny Gerasimov, Igor Prosvirin, Vladimir Rogov
Summary: LaFe0.4Ni0.6O3/CeO2 (1:1) two-phase composite materials were prepared by mechanochemical and Pechini routes. The catalytic properties of the composites in methane and CO oxidation reactions strongly depend on their preparation conditions. In low-temperature catalytic CO oxidation, the composites demonstrate higher activity compared with LaFe0.4Ni0.6O3 perovskite, with the highest activity observed for the composite prepared by mechanical treatment of perovskite and fluorite precursors. In high-temperature catalytic methane oxidation, the activity correlates with the reducibility of the samples, with the highest activity observed for the composite prepared by the one-pot Pechini route with higher reducibility up to 600 degrees C.
Article
Chemistry, Physical
Ilya Yakovlev, Serguei Tikhov, Evgeny Gerasimov, Tatiana Kardash, Konstantin Valeev, Aleksei Salanov, Yurii Chesalov, Olga Lapina, Oleg Lomovskii, Dina Dudina
Summary: The low specific surface area of metal powders produced by mechanical treatment often limits their use in various fields. This study explores the effect of hydrogen treatment on the structure of mechanically treated powders. A metal-oxide nanocomposite powder was successfully produced by mechanical alloying and high-pressure hydrogenation. The resulting nanocomposite shows potential for the synthesis of Fischer-Tropsch catalysts, due to its pulverization and an increase in specific sites.
Article
Chemistry, Physical
Olga A. Bulavchenko, Valeriya P. Konovalova, Andrey A. Saraev, Anna M. Kremneva, Vladimir A. Rogov, Evgeny Yu. Gerasimov, Tatyana N. Afonasenko
Summary: MnOx-ZrO2 catalysts were prepared using co-precipitation and vacuum impregnation methods and characterized through various techniques. The co-precipitated samples showed higher catalytic activity in CO oxidation compared to the vacuum impregnation samples. The results of the characterization studies revealed differences in the active components of the two preparation methods. For impregnation, the most active catalyst was obtained at 400 degrees C due to the formation of MnO2 oxide nanoparticles with Mn4+ and low-temperature reducibility. On the other hand, co-precipitation at 650-700 degrees C formed the most active CO oxidation catalysts. In this temperature range, a solid solution of MnyZr1-yO2-x and highly dispersed and active MnOx were formed.
Article
Chemistry, Physical
Andrey A. A. Saraev, Anna Y. Y. Kurenkova, Angelina V. V. Zhurenok, Evgeny Y. Y. Gerasimov, Ekaterina A. A. Kozlova
Summary: Photocatalysts based on g-C3N4 were investigated for CO2 reduction under visible light. The photocatalysts were prepared by calcination of melamine at 500-600 degrees C with platinum deposition. The effect of preparation conditions and platinum deposition method on the properties and activity of the photocatalysts was studied.
Article
Chemistry, Inorganic & Nuclear
Danila Vasilchenko, Sergey Tkachev, Pavel Tkachenko, Semen Berdyugin, Pavel Popovetskiy, Evgeny Gerasimov, Angelina Zhurenok, Ekaterina Kozlova
Summary: A combination of multinuclear nuclear magnetic resonance spectroscopy and theoretical calculation was used to study the speciation of Pt in different solutions. It was found that the gradual condensation of Pt species in bicarbonate solutions resulted in the formation of PtO2 nanoparticles. These nanoparticles were used to prepare Pt-containing catalysts with high selectivity and stability in hydrogen production. The hydrolysis of platinum(IV) carbonato complexes was studied and shown to be an efficient method for generating hydrated PtO2 nanoparticles.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Ksenia A. Nadeina, Sergey V. Budukva, Yuliya V. Vatutina, Polina P. Mukhacheva, Evgeniy Yu. Gerasimov, Vera P. Pakharukova, Igor P. Prosvirin, Tatyana V. Larina, Oleg V. Klimov, Aleksandr S. Noskov, Victor V. Atuchin
Summary: Among the known synthesis procedures and reagents for unsupported Ni-Mo-W catalysts, there is no consensus about optimal preparation conditions. In this study, Ni-Mo-W precursors were prepared via three different techniques and characterized. The catalytic activity was found to be significantly higher when all active metals are available in a mixed phase. The catalyst prepared by the spray drying method showed the highest activity.
Article
Chemistry, Inorganic & Nuclear
Pavel V. Markov, Galina O. Bragina, Nadezhda S. Smirnova, Galina N. Baeva, Igor S. Mashkovsky, Evgeny Y. Gerasimov, Andrey V. Bukhtiyarov, Yan. V. Zubavichus, Alexander Y. Stakheev
Summary: The effect of support on the performance of Pd1Ag10/Al2O3 and Pd1Ag10/CeO2-ZrO2 catalysts in the selective hydrogenation of diphenylacetylene (DPA) was investigated. The use of CeO2-ZrO2 as a carrier increased the activity of the Pd1Ag10 catalyst by three times without sacrificing selectivity compared to Pd1Ag10/Al2O3. The high selectivity of Pd1Ag10/CeO2-ZrO2 can be attributed to the stability of the structure of isolated Pd-1 sites on the surface of SAA Pd1Ag10/CeO2-ZrO2.
Article
Chemistry, Inorganic & Nuclear
Maxim D. Mikhnenko, Svetlana V. Cherepanova, Evgeny Yu Gerasimov, Alena A. Pochtar, Maria V. Alekseeva (Bykova), Roman G. Kukushkin, Vadim A. Yakovlev, Olga A. Bulavchenko
Summary: The structural features of NiO-SiO2 nanocrystalline catalyst synthesized by sol-gel method were investigated. XRD, TEM, and DD were used to study the structure. XRD simulations based on conventional Rietveld analysis and statistical models of 1D disordered crystals were conducted to extract structural information. The results showed the presence of two NiO-like oxides with different lattice constants and different average sizes in NiO-SiO2 catalyst.
Article
Chemistry, Physical
A. V. Sotnikov, M. M. Syrokvashin, V. V. Bakovets, E. V. Korotaev, E. Yu. Gerasimov
Summary: The Y2O3@SmS composite with a core-shell nanostructure was synthesized using the polyol sol-gel method. The precursor consisting of Y2O3 and Sm(acac)(3) solutions in ethylene glycol was converted into oxide powder through urea precipitation. The obtained precursor was then treated in a sulfidation atmosphere and annealed to obtain the final Y2O3@SmS composite. The composite was found to have a core-shell structure, with Y2O3 as the core and SmS as the shell. The synthesized sample contained core-shell nanoparticles with an average size of about 200 nm.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Fedor S. Golub, Evgeny Y. Gerasimov, Igor P. Prosvirin, Pavel E. Plusnin, Vasily A. Bolotov, Valentin N. Parmon, Dmitri A. Bulushev
Summary: Developing N-doped Pd/C catalysts for hydrogen production from gas-phase formic acid is a challenging task. Different methods were used to insert nitrogen on the surface of a mesoporous carbon support, and melamine was found to be the most efficient precursor. The reaction rate increased by a factor of 5 when the melamine/carbon mixture was pyrolyzed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Angelina V. V. Zhurenok, Danila B. B. Vasichenko, Semen N. N. Berdyugin, Evgeny Yu. Gerasimov, Andrey A. A. Saraev, Svetlana V. V. Cherepanova, Ekaterina A. A. Kozlova
Summary: Photocatalysts based on graphite-like carbon nitride with a low content of noble metals (Pd, Rh) were proposed for hydrogen evolution under visible light. Reduction of precursor complexes [Rh-2(H2O)(8)(& mu;-OH)(2)](NO3)(4)& BULL;4H(2)O and (Et4N)(2)[Pd(NO3)(4)] at 400 & DEG;C gave metallic particles. The synthesized photocatalysts were characterized and tested for hydrogen evolution, showing high activity for the 0.01-0.5% Rh/g-C3N4 series and the most efficient use of metal particles in the 0.1% Rh/g-C3N4 photocatalyst.
Article
Chemistry, Multidisciplinary
Anna Yu. Kurenkova, Andrey A. Saraev, Denis D. Mishchenko, Evgeny Yu. Gerasimov, Ekaterina A. Kozlova
Summary: In this study, graphitic carbon nitride g-C3N4 was modified using platinum and platinum oxide as catalysts for photocatalytic hydrogen production under visible light irradiation. The results showed that an optimal amount of platinum catalyst significantly enhanced the rate of hydrogen evolution and selectivity, while an excess of platinum led to an increase in the formation of by-products and a decrease in selectivity.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Vasily V. Kaichev, Andrey A. Saraev, Aleksandr V. Fedorov, Evgeny Yu. Gerasimov, Bo Weng
Summary: It was found that Pd nanoparticles with smaller particle sizes showed higher activity in the low-temperature oxidation of CO. In contrast, larger Pd nanoparticles were stable and consisted mainly of metallic palladium, resulting in lower activity. The difference in activity is attributed to the oxidation of small Pd nanoparticles and the change in chemical composition, leading to a change in the reaction mechanism.
Article
Chemistry, Physical
Svetlana V. Cherepanova, Egor G. Koemets, Evgeny Yu. Gerasimov, Irina I. Simentsova, Olga A. Bulavchenko
Summary: The reduction and structural changes of Co-based oxides doped with Al3+ ions were studied using in situ XRD and TPR techniques. It was found that Al3+ cations dissolved in the Co3O4 lattice and their distribution depended on the calcination temperature. The reduction process and phase transformation were affected by the distribution of Al in the mixed oxides.
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.