Article
Chemistry, Physical
Jean-Luc Blin, Laure Michelin, Benedicte Lebeau, Anton Naydenov, Ralitsa Velinova, Hristo Kolev, Pierrick Gaudin, Loic Vidal, Anna Dotzeva, Krasimir Tenchev, Silviya Todorova
Summary: New data on the structural and catalytic properties of mono-component cobalt and bi-component Co-Ce catalysts supported on SBA-15 are reported. Performance evaluation was conducted through combustion tests of methane, propane, and n-hexane, showing different catalytic activity and reducibility among these catalysts.
Article
Chemistry, Multidisciplinary
Xiaohui Gao, Yuting Bai, Hao Zhang, Xingyi Wang
Summary: Pt catalysts with different chemical states and structures were supported on CeO2 and investigated in catalytic oxidation reactions. The Pt/CeO2-SR catalyst exhibited high activity and stability in the oxidation of n-decane, while the Pt/CeO2-WI catalyst showed lower activity and stability. The adsorption of alkane molecules occurred through the interaction with Ce-OH, with weaker adsorption for C6H14 and C3H8 compared to n-decane.
Article
Chemistry, Physical
Anton Naydenov, Ralitsa Velinova, Jean-Luc Blin, Laure Michelin, Benedicte Lebeau, Hristo Kolev, Yordanka Karakirova, Daniela Karashanova, Loic Vidal, Anna Dotzeva, Krasimir Tenchev, Silviya Todorova
Summary: A propane combustion catalyst based on Mn and Ce supported by SBA-15 was synthesized and characterized. The catalyst showed catalytic activity in the combustion of methane, propane, and butane. The formation of difficult to reduce oxide phases led to lower catalytic activity.
Article
Chemistry, Applied
Pengpeng Liu, Zihui Qiu, Huibing Shi, Yu Song, Deming Zhao, Pengzhao Wang, Tinghai Wang, Xiaojun Bao
Summary: In order to improve the selectivity of zeolite Beta-catalyzed isomerization of normal alkane, a simple and efficient route to prepare Beta@SBA-15 composite supports was reported. The addition of SBA-15 and the milling process disaggregated the Beta particles and anchored the Beta nanocrystals on the surface of SBA-15. This resulted in a 50% increase in apparent diffusivities and higher selectivity to isomers in n-hexane isomerization tests.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Physical
Ganggang Li, Na Li, Yonggang Sun, Yingmin Qu, Zeyu Jiang, Zeyu Zhao, Zhongshen Zhang, Jie Cheng, Zhengping Hao
Summary: Novel amorphous Co-Mn binary oxides with enhanced defect were fabricated through a facile self-redox approach, showing remarkable catalytic activity for propane oxidation with the best T-90 at 207 degrees Celsius. In situ spectroscopy technologies were utilized to explore the structure-activity relationship and degradation mechanism of propane oxidation under real reaction conditions. As an effective defect engineering strategy, amorphous binary oxides exhibit excellent activity and can provide insights for developing efficient VOCs catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Alexandros Safakas, Vasileios Ch. Kournoutis, Georgios Bampos, Symeon Bebelis
Summary: Perovskites are a promising alternative catalyst for oxidation reactions due to their lower cost and greater thermal stability. Increasing the Co/Fe ratio can enhance the catalytic activity for CO and propane oxidation, under both oxidative and stoichiometric conditions. The increase in Co content facilitates the formation of oxygen vacancies, improving the catalytic performance.
Article
Energy & Fuels
Norshakirah Ahmad Rashidi, Elnida Mustapha, Yeow Yean Theng, Noor Azira Abdul Razak, Najihah Abdul Bar, Khairul Basyar Baharudin, Darfizzi Derawi
Summary: Waste cooking oil is an attractive feedstock for producing advanced biofuels due to its low cost and abundant availability. This study focused on the synthesis and analysis of mesoporous bimetallic catalysts for the catalytic deoxygenation of waste cooking oil. The results showed that the catalyst with 10% Ni-Fe/SBA-15 had the highest liquid yield but low selectivity towards the diesel fraction, while the catalyst with 5% Ni-Co/SBA-15 had the highest selectivity towards the diesel fraction.
Article
Green & Sustainable Science & Technology
P. Jain, M. Chimote, C. P. Vinod
Summary: Bimetallic nanoparticles with synergistic effects can enhance the catalytic activity, selectivity, and stability of solid materials. The study synthesized Au@Co core-shell bimetallic nanoparticles and demonstrated efficient and stable CO conversion in the FT reaction.
MATERIALS TODAY SUSTAINABILITY
(2021)
Article
Chemistry, Physical
Ping Chen, Ying Wang, Peipei Wang, Mingyan Gu, Boyu Jiang, Kun Luo, Jianren Fan, Yi Wang
Summary: Ammonia-coal co-combustion is a feasible approach for reducing CO2 emissions in thermal power generation. Studying the NO formation mechanism during ammonia-coal co-firing is necessary for achieving low-carbon and low-nitrogen combustion. Experimental results show that temperature and ammonia ratio significantly influence NO formation. Theoretical calculations indicate that NH formation in NH3->NH->NO is one of the limiting factors for ammonia combustion. The combination of experimental and theoretical results suggests that high temperatures enhance the reduction of NO by ammonia/char, reducing the conversion of ammonia-N/coal-N to NO.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Organic
Yangwu Tian, Xiaqun Guo, Meichao Li, Chunmei Li, Xinquan Hu, Liqun Jin, Nan Sun, Baoxiang Hu, Zhenlu Shen
Summary: In this research, a novel catalyst 1-Me-AZADO was designed and immobilized on SBA-15 support, showing high catalytic efficiency for selective oxidation of alcohols to carbonyl compounds under Anelli's conditions. Moreover, this immobilized catalyst can be conveniently recovered and reused multiple times without significant loss of catalytic activity.
Article
Chemistry, Applied
Yanan Qin, Junmei Luo, Qingda An, Zuoyi Xiao, Jingai Hao, Yao Tong, Shangru Zhai
Summary: The newly developed catalyst, a combination of Co/N@ZS and alginate hydrogels, showed high efficiency in degrading contaminants using peroxymonosulfate activation, with excellent recovery and recyclability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Lei Cao, Yi Qiu, Shizhong Luo, Chengfa Jiang, Fangli Jing
Summary: In this study, mesoporous Sn-SBA-15 materials with varied pore size were synthesized by changing the hydrothermal temperature, and PtSn oxides were dispersed within them using an impregnation method. The results showed that the pore size had significant effects on the properties and catalytic performance of the catalyst, with the optimal pore size being 8 nm.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Applied
S. Todorova, J. L. Blin, A. Naydenov, B. Lebeau, D. Karashanova, H. Kolev, P. Gaudin, R. Velinova, L. Vidal, L. Michelin, L. Josien, D. Filkova, I. Ivanova, A. Dotzeva, K. Tenchev
Summary: The hierarchical macro-mesoporous silica (MMS) was used for catalyst support for oxidation reactions. The MMS was synthesized by the emulsions templating mechanism and modified separately or simultaneously with cobalt and manganese oxides. The modified materials showed partially blocked pores due to the oxides, with Co3O4 agglomerates and amorphous manganese oxide filling up the mesopores.
Article
Chemistry, Physical
Tatyana N. N. Afonasenko, Daria V. V. Yurpalova, Zakhar S. S. Vinokurov, Andrey A. A. Saraev, Egor E. E. Aidakov, Valeriya P. P. Konovalova, Vladimir A. A. Rogov, Olga A. A. Bulavchenko
Summary: The MnOx-ZrO2-CeO2 oxide catalysts were synthesized and their catalytic properties were studied. The Zr/Zr + Ce molar ratio had little effect on the catalytic activity, while the manganese content exhibited a volcano-like dependence in CO oxidation and a linear increase in propane oxidation. XRD and XPS analysis revealed an increase in crystalline manganese oxides and surface concentration of manganese with increasing Mn concentration in the catalyst, while the content of MnxZryCe1-x-yO2 solid solution decreased. The CO oxidation activity was determined by the balance between the solid solution and the concentration of manganese cations, while the propane oxidation activity was less sensitive to the state of manganese ion.
Article
Chemistry, Applied
Hassnain Abbas Khan, Mohamad Abou-Daher, Ana-Luiza S. de Freitas, Janardhanraj Subburaj, Omar EI Tall, Aamir Farooq
Summary: This work investigates the oxidation of methane, propane and ethylene in the presence of carbon monoxide (CO) and water vapors over Pt and Pd mono and bimetallic catalysts supported on SBA-15. The study finds that Pd exhibits higher activity towards alkanes (methane and propane) at low temperatures, while Pt is more active for ethylene. Optimal alloying compositions have the potential to minimize the decrease in conversion activity in the presence of CO and water vapors.
Article
Chemistry, Analytical
Helena Brunckova, Lucas Alonso Rocha, Eduardo Jose Nassar, Susane Bonamin Moscardini, Hristo Kolev
Summary: Thin films of lanthanide orthoniobate LnNbO(4) and orthotantalate LnTaO(4) (Ln = Nd, Sm, Eu) were successfully fabricated using the sol-gel method and exhibited excellent luminescence properties, making them promising candidates for applications in sensors and imaging equipment.
Article
Chemistry, Physical
Maya Shopska, Alfonso Caballero, Francisco Platero, Silviya Todorova, Krassimir Tenchev, Martin Fabian, Katerina Aleksieva, Hristo Kolev, Georgi Kadinov
Summary: The properties of prereduced (10%Co + 0.5%Pd)/Al2O3 (TiO2) systems in the CO hydrogenation reaction were studied, and it was found that catalysts using alumina or titania as supports exhibited different selectivity towards methane and activity. The reaction led to metal surface reconstruction and increased formation of CH2 groups, especially with titania-supported catalysts. Stability tests and high-pressure catalytic tests revealed the different behaviors and product distributions of both systems.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Chemistry, Physical
Anton Naydenov, Ralitsa Velinova, Jean-Luc Blin, Laure Michelin, Benedicte Lebeau, Hristo Kolev, Yordanka Karakirova, Daniela Karashanova, Loic Vidal, Anna Dotzeva, Krasimir Tenchev, Silviya Todorova
Summary: A propane combustion catalyst based on Mn and Ce supported by SBA-15 was synthesized and characterized. The catalyst showed catalytic activity in the combustion of methane, propane, and butane. The formation of difficult to reduce oxide phases led to lower catalytic activity.
Article
Chemistry, Physical
Consolato Rosmini, Tanya Tsoncheva, Daniela Kovatcheva, Nikolay Velinov, Hristo Kolev, Daniela Karashanova, Momtchil Dimitrov, Boyko Tsyntsarski, David Sebastian, Maria Jesus Lazaro
Summary: Ceria-iron oxide mesoporous materials were modified with Ni-Fe alloys and further transformed into ferrous carbides and metal alloys encapsulated within carbon nanofibers. The modified phases showed high electrochemical activity and low overpotential in the Oxygen Evolution Reaction. The morphological, textural and physicochemical properties of the samples were characterized in detail.
Article
Chemistry, Multidisciplinary
Helena Brunckova, Erika Mudra, Magdalena Streckova, Lubomir Medvecky, Tibor Sopcak, Ivan Shepa, Alexandra Kovalcikova, Maksym Lisnichuk, Hristo Kolev
Summary: The present study focuses on the synthesis and structural properties of amorphous terbium metal-organic framework thin film (TbMOF-TF) and its transformation to terbium oxide at 450 degrees C. Different amounts of modulator were used to prepare crystalline and amorphous films, which were characterized by various techniques. The results showed that the amorphous film was fully transformed to terbium oxide at 450 degrees C.
Article
Chemistry, Multidisciplinary
Elodie Layan, Juhi Gupta, Isabelle Ly, Frederic Nallet, Ahmed Bentaleb, Eric Laurichesse, Renaud Vallee, Jean-Luc Blin, Benedicte Lebeu, Frederic Louerat, Mickael Le Bechec, Peter Moonen, Thierry Toupance, Thierry Pigot, Renal Backov
Summary: Three-dimensional photoactive self-standing porous materials have been synthesized through the integration of soft chemistry and colloids. These materials show promising applications in air purification and offer advantages in terms of volume and handling compared to powders. Additionally, the volumetric counterintuitive acting mode for light-induced reactions opens the door for further advanced applications in various fields.
Article
Chemistry, Physical
Bozhidar Grahovski, Ralitsa Velinova, Pavletta Shestakova, Anton Naydenov, Hristo Kolev, Iliyana Yordanova, Georgi Ivanov, Krasimir Tenchev, Silviya Todorova
Summary: ZSM-5 zeolites with different Si/Al ratios were modified using a buffer solution of HF and NH4F, resulting in a material with secondary mesoporosity. Deposition of cobalt from an aqueous solution of cobalt acetate on the surface of treated samples led to the formation of various cobalt oxide species, including bulk-like Co3O4 phases, Co2+ in ion exchange positions, and silicate-like phases. The catalysts prepared using the treated ZSM-5 exhibited higher activity in propane and n-hexane oxidation reactions compared to catalysts containing untreated zeolite. This improvement can be attributed to the finer dispersion of metal oxide particles and the presence of secondary mesoporosity, which provide access to a larger number of active sites.
Article
Chemistry, Multidisciplinary
Margarita Gabrovska, Dimitrinka Nikolova, Hristo Kolev, Daniela Karashanova, Peter Tzvetkov, Blagoy Burdin, Emiliya Mladenova, Daria Vladikova, Tatyana Tabakova
Summary: This study investigates the use of yttrium-doped barium cerate (BCY15) as a ceramic matrix for obtaining Ni/BCY15 anode cermet in proton-conducting solid oxide fuel cells (pSOFC). The preparation of Ni/BCY15 cermets in different mediums (deionized water and ethylene glycol) and subsequent high temperature treatment was analyzed in terms of the resistance of metallic Ni in the anode catalysts. The presence of residual metallic Ni in the ethylene glycol medium was experimentally confirmed, which indicated a higher resistance to oxidation and contributed to the stability of the Ni/BCY15-EG-1100 anode cermet.
Article
Chemistry, Physical
Halyna Yankovych, Gergo Bodnar, Michael S. Elsaesser, Maksym Fizer, Liudmyla Storozhuk, Hristo Kolev, Inna Melnyk, Miroslava Vaclavikova
Summary: The research focuses on the synthesis of composites of titania and activated carbon using ultrasound-assisted sol-gel method, aiming at efficient photocatalytic removal of 4-halogenophenols. The analytical techniques used in the study showed the potential photocatalytic properties of the synthesized materials based on the availability of titania polymorphs and the high surface area of activated carbon. The composites exhibited high removal efficiency of up to 99.9% and rapid degradation rate, attributed to the additional elimination forces provided by activated carbon. XPS studies also indicated the potential of the materials for cyclic usage. DFT modelling revealed the interaction between 4-chlorophenol and the synthesized materials during photocatalysis. The study suggests the potential application of the materials in chemical pollution treatment.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Ralitsa Velinova, Silviya Todorova, Daniela Kovacheva, Hristo Kolev, Yordanka Karakirova, Pavel Markov, Katerina Tumbalova, Georgi Ivanov, Anton Naydenov
Summary: New results on the effect of TiO2 on Pd/La2O3-CeO2-Al2O3 systems for catalytic oxidation of methane in the presence of H2O and SO2 have been obtained. The presence of Ce3+ and the changes in Pd-clusters and TiO2 were observed after aging. Ti modification of the La2O3-CeO2-Al2O3 system leads to higher resistance towards SO2. The reaction pathway over the Pd/La2O3-CeO2-TiO2-Al2O3 catalyst follows the Mars-van Krevelen mechanism.
Article
Chemistry, Physical
Yuri Kalvachev, Totka Todorova, Hristo Kolev, Daniel Merker, Cyril Popov
Summary: In this study, zeolite X (FANaX) was synthesized from coal fly ash (FA) and from pure chemicals (NaX) to compare their effectiveness. Platinum-modified zeolite samples were obtained through wet impregnation of Pt nanoparticles on both types of zeolite crystals. Among them, Pt-impregnated FA zeolite (Pt FANaX) showed the highest activity in benzene oxidation. Compared to the reference PtFe NaX zeolite, Pt FANaX exhibited a temperature advantage of 10°C at 50% benzene conversion. These results suggest that FA zeolites are a good, cheaper, and environmentally friendly alternative to traditional zeolites for the purification of gaseous mixtures.
Article
Chemistry, Physical
Dobrina Ivanova, Ralitsa Mladenova, Hristo Kolev, Nina Kaneva
Summary: This study focuses on the fabrication and characterization of zinc oxide films with silver ions for enhanced photocatalytic performance. The films were deposited on glass substrates using sol-gel dip-coating methods and functionalized with different concentrations of Ag+ ions through room temperature ion fixation process with and without UV illumination. Various characterization techniques confirmed the structure and efficiency of the films. The results showed that the photocatalytic activity increased with higher Ag+ ion concentration and UV illumination. The optimal silver concentration for the highest photocatalytic efficiency was determined.
Article
Mathematics, Interdisciplinary Applications
Gabriela Petcu, Gianina Dobrescu, Irina Atkinson, Madalina Ciobanu, Jean-Luc Blin, Viorica Parvulescu
Summary: In this study, Zeolite Y and Ti-containing Zeolite Y were synthesized using a hydrothermal seed-assisted method. The evolution of morphology, structure, and fractal dimensions during the zeolitization process was analyzed, revealing the mechanism of zeolite synthesis and the effect of titanium on structural properties.
FRACTAL AND FRACTIONAL
(2022)
Article
Chemistry, Physical
Bozhidar Stefanov, Vesselina S. Milusheva, Hristo G. Kolev, Boriana R. Tzaneva
Summary: In this study, we patterned conductive copper layers on TiO2-functionalized anodic aluminium oxide (AAO) through Cu electroless deposition (Cu-ELD). The functionalization of TiO2 improved the chemical stability of AAO and allowed its metallization in an alkaline environment. The surface activation of TiO2/AAO was achieved by photocatalytic reduction of a Cu[EDTA] complex under UV illumination. Conductive Cu patterns with low sheet resistance were obtained through Cu-ELD.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
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.