Article
Engineering, Chemical
Ashvin L. L. Karemore, Renu Sinha, Parivesh Chugh, Prakash D. D. Vaidya
Summary: In this study, the performance of two Pt-based catalysts in the process of carbon dioxide reforming of methane (CDRM) was investigated. The effects of parameters such as space time, CO2/CH4 ratio, and time-on-stream on the conversion and yield of CH4 and CO2 were analyzed. The kinetics of CDRM were also studied and analyzed using different kinetic models.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Paulina Jagodka, Krzysztof Matus, Michal Sobota, Agata Lamacz
Summary: Dry reforming of methane (DRM) is an important process for transforming two potent greenhouse gases into synthesis gas. However, prompt deactivation of the catalyst due to carbon deposition can be hindered by proper catalyst design.
Article
Chemistry, Physical
Muhammad Anees Ul Hasnain, Asif Hussain Khoja, Faaz Ahmed Butt, Mariam Ayesha, Faisal Saleem, Muhammad Taqi Mehran, Rabia Liaquat, Majid Ali, Zaki Ismail Zaki
Summary: In this study, partial oxidation of methane using Mg-Ni-Al (MNA) hydrotalcite promoted CeO2 catalyst was investigated. The CeO2@MNA catalyst showed good activity and stability, making it suitable for catalytic synthesis reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Abbas Khaleel, Abdul Rasheed Pillantakath, Abdulmuizz Adamson
Summary: Coking is a major cause of catalyst deactivation in catalytic methane reforming processes. Doping the support of Ni/g-Al2O3 catalysts with iron was found to significantly enhance coking resistance in methane partial oxidation, mainly due to the redox functionality of iron after reduction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Anh Ngoc T. Cao, Cham Q. Pham, Tung M. Nguyen, Thuan Van Tran, Pham T. T. Phuong, Dai-Viet N. Vo
Summary: Dysprosium (Dy) promoted Co/Al2O3 catalysts with different Dy loadings were synthesized and found to enhance the basicity and activity of the catalysts for methane dry reforming. The addition of Dy reduced the crystallite size of Co3O4, resulting in better metal dispersion and higher catalytic performance. The optimal Dy loading was found to be 0.3 wt%, achieving the highest CH4 conversion and H-2 and CO yields.
Article
Energy & Fuels
Shiva Fazlikeshteli, Xavier Vendrell, Jordi Llorca
Summary: In this study, monometallic Ru, Pd, and bimetallic Ru-Pd catalysts were prepared via mechanochemical and conventional incipient wetness impregnation methods and used in the partial oxidation of methane (POM). The results showed that bimetallic catalysts exhibited higher catalytic activity and stability compared to monometallic ones, and the catalysts prepared by mechanochemical method produced synthesis gas at a lower temperature compared to conventional catalysts.
Review
Chemistry, Physical
T. J. Siang, A. A. Jalil, S. Y. Liew, A. H. K. Owgi, A. F. A. Rahman
Summary: This review provides a comprehensive evaluation of the recent works on the synergistic relationship among catalyst components in methane partial oxidation. The advancements achieved through this synergy enhance the properties of existing catalysts and contribute to the discovery and development of novel catalyst systems.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Sui Wan, Kevin Keller, Patrick Lott, Akash Bhimrao Shirsath, Steffen Tischer, Thomas Haber, Rainer Suntz, Olaf Deutschmann
Summary: Planar laser-induced fluorescence with laser synchronized flow control is used to investigate the dynamics and mass transfer of a NOx storage catalyst. The experiment results are compared with numerical simulations to understand the thermodynamic equilibrium and storage rate of NO oxidation under different conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Energy & Fuels
Joao P. Nascimento, Rita de Cassia F. Bezerra, Elisabete M. Assaf, Alessandra F. Lucredio, Rinaldo S. Araujo, Gilberto D. Saraiva, E. Rodriguez-Castellon, E. Rodriguez-Aguado, Gardenia S. Pinheiro, Alcineia C. Oliveira
Summary: This study investigated the deactivation behaviors of MeMo/La2O3-Al2O3 and MeMo/Nb2O5 supported catalysts in the tri-reforming of methane (TRM). Characterization techniques were used to assess the effects of transition metal components on the causes of catalyst deactivation. The results indicated that the presence of PtMo alloy improved CH4 activation and prevented carbon accumulation in PtMo/Nb2O5, while the formation of LaPtOx[Pto]n surface oxygen species resulted in sintering of Pto particles and no oxidation of deposited carbon. The incorporation of Co in Mo/La2O-Al2O3 and Mo/Nb2O5 led to continuous reoxidation of Co species, and significant coke deposition was observed on the Nio sites of NiMo/La2O3-Al2O3 and NiMo/Nb2O5 due to Boudouard and methane cracking reactions.
Article
Chemistry, Multidisciplinary
Intan Clarissa Sophiana, Ferry Iskandar, Hary Devianto, Norikazu Nishiyama, Yogi Wibisono Budhi
Summary: Dry reforming of methane was studied using high-ratio zirconia in ceria-zirconia-mixed oxide-supported Ni catalysts. The effects of the catalyst support and Ni composition on the catalyst performance were investigated. The results showed that the 10%Ni/CeZrO2 catalyst exhibited the highest catalytic performance, with a high H-2/CO ratio indicating superior hydrogen production.
Article
Energy & Fuels
N. V. Ruban, V. N. Rogozhnikov, O. A. Stonkus, V. A. Emelyanov, V. P. Pakharukova, D. A. Svintsitskiy, S. V. Zazhigalov, A. N. Zagoruiko, P. V. Snytnikov, V. A. Sobyanin, D. I. Potemkin
Summary: The study focuses on using structured catalysts with metal grids as carriers to transform fossil fuels into hydrogen-rich syngas. Rh-based catalyst performs best at 600 degrees C, achieving up to 70.3% hydrogen content, while Pt-based catalyst shows good performance at 700 degrees C, obtaining -40% H2 content and a H2/CO molar ratio of 5.5. A mathematical model is developed to describe the performance of Pt-based catalyst in methane autothermal reforming (MATR) process.
Article
Engineering, Environmental
Ahad Hussain Javed, Nadia Shahzad, Faaz Ahmed Butt, M. Abdullah Khan, Nida Naeem, Rabia Liaquat, Asif Hussain Khoja
Summary: The study successfully utilized Co-Ni loaded ZnO nanoprisms as catalysis for partial oxidation of methane to produce syngas, demonstrating high catalytic activity and a high CH4 conversion rate. The catalyst showed a high selectivity towards H2, stability, and good performance in reaction pathways.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Venkata D. B. C. Dasireddy, Blaz Likozar
Summary: This study prepared bimetallic Cu/Fe-based catalysts for the oxidation of methane to methanol, with HT Cu-Fe/Al2O3 exhibiting the highest activity. The catalytic process relied on metal atom dispersion and showed a direct chemosynthesis of alcohol, which was influenced by the oxidant molecule type used.
Article
Chemistry, Physical
Asif Hussain Khoja, Ahad Hussain Javed, Salman Raza Naqvi, Sehar Shakir, Israf Ud Din, Zafar Arshad, Umer Rashid, Umair Yaqub Qazi, Nida Naeem
Summary: CaO decorated TiO2 catalysts were synthesized using the sol-gel method and exhibited excellent performance in the partial oxidation of methane experiment. The methane conversion rates of the catalysts loaded with 2% and 3% CaO reached 83.6% and 79.5% respectively, and the H-2/CO ratios were slightly higher than the theoretical value.
Article
Chemistry, Physical
Changsong Cui, Yue Wang, Yongcheng Tong, Shiwei Wang, Chusheng Chen, Zhongliang Zhan
Summary: The research introduces a symmetric cell Ni-SDC catalyst system for CH4-assisted co-electrolysis of H2O/CO2, which effectively reduces electricity consumption and produces syngas with a H-2:CO ratio of approximate to 2 at high temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Lucas G. Moura, Rafael P. Borges, Fabio B. Noronha, Carla E. Hori
Summary: The study investigated the catalytic activity and stability of nickel, platinum, rhodium, and ruthenium-based catalysts during hydrogen production from steam reforming of liquefied petroleum gas. It was found that rhodium and platinum catalysts exhibited higher catalytic activity and lower deactivation compared to nickel and ruthenium catalysts. Small increases in particle sizes of Ni(0) and Ru(0) during the process could contribute to the faster deactivation of Ru/CS and Ni/CS catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Mayara dos Santos Amarante, Sabrina Morais da Silva, Joao Paulo Barros Machado, Manuel Henrique Lente, Adriana Maria da Silva, Vera Lucia Othero de Brito
Summary: This study prepared sintered ferrite-BaTiO3 composite samples by mixing cobalt ferrite and nickel-cobalt ferrite with BaTiO3, and analyzed their sintering behavior and interactions through dilatometry, thermogravimetry, and calorimetry. The results showed that the densification of the composite samples was affected, and reactions between the ferrites and BaTiO3 occurred during sintering.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Rondinele Alberto dos Reis Ferreira, Cicero Naves de Avila Neto, Fabio Bellot Noronha, Carla Eponina Hori
Summary: The effect of Ni catalysts with different loadings on MgAl2O4 for LPG steam reforming was studied. The results showed that the reduction temperature and product similarity varied with different loadings, and higher loading samples exhibited better activity.
CHEMICAL ENGINEERING COMMUNICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Ana Carolina Fornereto Soldan, Sarah Arvelos, Erika Ohta Watanabe, Carla Eponina Hori
Summary: This study aimed to explore the potential of supercritical fluid extraction (SFE) to obtain oleoresin from Capsicum annuum pepper (Jalapeno) industrial waste. The results showed that temperature variation and the addition of cosolvent significantly increased the extracted mass of oleoresin, while pressure did not have a significant effect. The extracted compounds contained bioactive components but showed no significant antioxidant activity. Economic assessment indicated that SFE of oleoresin from the studied industrial waste can be profitable.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Medicinal
Camila Capelini, Katia R. de Souza, Juliana M. C. Barbosa, Kelly Salomao, Policarpo A. Sales Junior, Silvane M. F. Murta, Solange M. S. V. Wardell, James L. Wardell, Edson F. da Silva, Samir A. Carvalho
Summary: In this study, a new series of phenoxyacetohydrazones derivatives were designed, synthesized, and evaluated for their antitrypanosomal and cytotoxic activities. Compound 11 showed activity against trypomastigotes equivalent to benznidazole, while compound 19 exhibited significantly higher activity against infected cultures compared to the standard drug.
MEDICINAL CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Alice Medeiros de Lima, Sandra Cristina Dantas, Adilson Jose de Assis, Carla Eponina Hori
Summary: The influence of temperature, residence time, and C2H5OH feed concentration on the ethanol dehydration reaction was investigated using the response surface methodology for gamma-Al2O3 and CeZrO2 catalysts. The optimization results showed different optimum conditions for each catalyst, and catalyst characterization was performed using various techniques.
Article
Chemistry, Inorganic & Nuclear
Joao L. M. Barros, Matheus M. Nunes, Odivaldo C. Alves, Carlos A. Franchini, Evaldo J. Corat, Adriana M. Silva
Summary: The synthesis of Cu-based catalysts supported on reduced graphene oxide (rGO) and its hybrids (Al-rGO and Zr-rGO) are reported. The preparation method and nature of the rGO promoter were investigated, revealing their influence on the catalytic properties.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Energy & Fuels
Marcus P. B. Martins, Carla E. Hori, Marcos A. S. Barrozo, Luiz G. M. Vieira
Summary: This study investigated the potential of Spirulina platensis to produce bio-oil from catalytic solar pyrolysis assisted by Fresnel lens and evaluated the effects of catalyst on the yield and quality of the liquid product. The results showed that the mixed oxides derived from hydrocalumite improved the quality of bio-oil by reducing the content of oxygenated compounds and increasing the percentage of hydrocarbons.
Article
Chemistry, Physical
Lucas Mendes Vieira, Dyovani Bruno Lima Santos, Carla Eponina Hori
Summary: In this study, the sorption-enhanced steam reforming of ethanol process was investigated using modified catalysts. The results showed that the catalyst containing mayenite exhibited the best CO2 capture capacity and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Cassiano Cunha Oliveira, Carla Eponina Hori
Summary: This study evaluated the performance of nickel-based catalysts supported on CaO and CaO-MgO-Al2O3 in the sorption enhanced steam reforming of ethanol. The addition of MgO and Al2O3 to CaO improved the stability and purity of the catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Gustavo Paiva Ribeiro, Sandra Cristina Dantas, Eloizio Julio Ribeiro, Carla Eponina Hori
Summary: Single superphosphate (SSP) is produced through complex reactions by direct reaction between phosphate rock concentrates and sulfuric acid in Brazil. The presence of iron oxide in the phosphate concentrates poses a challenge in SSP production, as it may result in the formation of water-insoluble iron phosphates with lower agronomic efficiency. However, the study found that with optimized reaction conditions, SSP with high NAC solubility and conversion rates nearing 100% can be achieved even with phosphate concentrates containing up to 14.7% Fe(2)O(3). These findings demonstrate the technical feasibility of using phosphate rocks with higher iron concentrations in industrial operations.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Editorial Material
Chemistry, Physical
Adriana Maria da Silva
Article
Engineering, Environmental
Raissa Aparecida da Silveira Rossi, Leilei Dai, Marcos Antonio de Souza Barrozo, Luiz Gustavo Martins Vieira, Carla Eponina Hori, Kirk Cobb, Paul Chen, Roger Ruan
Summary: This study investigates the catalytic microwave-assisted pyrolysis of microalgae in a tandem catalytic bed, aiming to reduce the formation of unwanted compounds and enhance aromatic hydrocarbon production. The results show that the hydrotalcite catalyst promotes de-acidification and de-nitrification reactions, while the zeolite catalyst converts intermediate compounds into hydrocarbons. The maximum hydrocarbon and benzene yields are achieved at a temperature of 500 degrees C and a NiHTC/SiC:NiHZSM-5/SiC catalyst ratio of 1:1. The study also provides important data on energy recovery and bio-oil quality during the catalytic pyrolysis of microalgae.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Lucas G. Moura, Grazielle Emanuella S. dos Santos, Higor O. Alves, Juliane Z. Marinho, Marcos A. S. Barrozo, Antonio Otavio T. Patrocinio, Fabio B. Noronha, Carla E. Hori
Summary: The catalytic performance of nickel-based catalysts in the gas-phase hydrogenation reaction was investigated, showing good catalytic activity and selectivity. Additionally, the concentration of the catalyst and the type of biomass used also had a significant influence on the product distribution.
Article
Materials Science, Multidisciplinary
Mariany Ludgero Maia Gomes, Gisele Aparecida Amaral-Labat, Ana Paula Silva de Oliveira, Mauricio Ribeiro Baldan, Adriana Maria da Silva
Summary: This study demonstrates the use of an organic gel, xerogel, as a catalyst support for Cu, synthesized from the tannin-formaldehyde system with F-127 Pluronic as a surfactant. The Cu species are heterogeneously dispersed on the xerogel support, showing high surface area and thermal stability, making it feasible for catalytic applications. XRD, Raman spectroscopy, and XPS results further confirm the presence of CuO, Cu2O, and Cu-0 on the xerogel, indicating chemical interactions between Cu precursor and oxygen groups.
MATERIA-RIO DE JANEIRO
(2021)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.
