Article
Chemistry, Applied
N. Catherin, E. Blanco, D. Laurenti, L. Piccolo, F. Simonet, C. Lorentz, E. Leclerc, V Calemma, C. Geantet
Summary: The research explored the performance of various transition metal sulfides supported on Y zeolites in gas-phase decalin hydroconversion under high hydrogen pressure (5 MPa) and in the presence of 0.8% H2S concentration. The study revealed that catalytic activity was enhanced by using ternary sulfides, such as noble metal-based sulfides, leading to high decalin conversion levels and ring opening products.
Article
Chemistry, Physical
Alexander P. Spanos, Aamena Parulkar, Nicholas A. Brunelli
Summary: Enhancement of catalytic performance of zeolites can be achieved by controlling catalytic sites and reaction environment. Experimental results show that a hydrophobic framework is beneficial for alcohol ring opening of epoxides, with hydrophobic materials demonstrating higher turnover frequencies than hydrophilic catalysts under certain reaction conditions.
JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Chemical
Juliana Sanchez, Kevin J. Smith, Fanor Mondragon, Andres Moreno
Summary: The study investigated the bifunctional behavior of MoS2-ASA catalysts and found that maximum yield could be achieved within a certain ratio range, while deviations from bifunctional behavior occurred when the ratio was too high or too low.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Larissa Brito, Gerhard D. Pirngruber, Emanuelle Guillon, Florian Albrieux, Johan A. Martens
Summary: The study on hydroisomerization and hydrocracking of octylcyclohexane using a bifunctional Pt/USY zeolite catalyst reveals a kinetic competition between isomerization and cracking, leading to favorable cracking distribution upon molecule tribranching.
Article
Chemistry, Physical
Leah Ford, Alexander Spanos, Nicholas A. A. Brunelli
Summary: Sn-Beta is a complex catalyst with multiple types of active sites, and its activity can be calculated using site quantification experiments. This study connects site quantification experiments with spectroscopic measurements to explain the differences in catalytic activity between materials crystallized for different amounts of time. The activity difference between Sn-Beta-200-10d and Sn-Beta-200-40d can be attributed to the reduced fraction of high-activity sites. Combining site quantification experiments with NMR techniques allows for the establishment of a synthesis-structure-activity relationship that has the potential to improve the performance of Sn-Beta.
Article
Energy & Fuels
Feng Yu, Chuanhao Zhang, Ruyi Geng, Haoxiang Zhou, Qi Dong, Shoujun Liu, Binbin Fan, Ruifeng Li
Summary: NiMo/gamma-Al2O3 catalysts with different hydrogenation functions were prepared and Beta zeolites with different acidity were synthesized. The influence of the metal-acid balance on the hydrocracking of naphthalene was investigated through the coupling of NiMo/gamma-Al2O3 catalysts with Beta zeolite. The catalytic performance of the coupled catalysts depended on the hydrogenation ability of NiMo/gamma-Al2O3 and the acidity of Beta zeolite, and the Si/Al ratio, crystal size, and amount of Beta zeolite greatly affected the hydrocracking performance.
Article
Chemistry, Multidisciplinary
Pavel A. Kots, Brandon C. Vance, Dionisios G. Vlachos
Summary: Hydroconversion technologies have emerged as a prominent method for deconstructing plastic waste. Studies have compared various catalysts and plastics under different conditions, while also drawing mechanistic similarities from past literature to propose standard approaches to tune product selectivity. The research highlights the plastics materials gap and the challenges it poses, along with discussing current limitations and suggesting future work.
REACTION CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Wenli Zhao, Xiaopo Niu, Guangni Liu, Xiurong Zhang, Qingfa Wang
Summary: Three kinds of Pt nanocrystals with different morphologies were synthesized to prepare catalysts for the ring-opening reaction of decalin. The 5 nm truncated octahedral Pt/CNT-USY with exposed (100) and (111) facets showed higher yield of ring-opening products. Additionally, the 5 nm cubic Pt catalyst exhibited better catalytic activities compared to the 10 nm cubic Pt catalyst, attributed to the smaller size and more revealable metal active sites of Pt nanocrystals.
Review
Chemistry, Applied
Feixiang Sun, Erik V. Van Der Eycken, Huangdi Feng
Summary: Oxazolidinone, as a class of important cyclic carbamates, plays a pivotal role in modern organic synthesis and pharmacology. Recent research has focused on their synthesis and ring-opening transformations, aiming to provide researchers opportunities for discovering new reactions.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Engineering, Chemical
Silvana A. D'Ippolito, Adriana D. Ballarini, Santiago M. Rosas, Laurence Pirault-Roy, Catherine Especel, Florence Epron, Carlos L. Pieck
Summary: The study investigated the influence of Ir content on sulphur tolerance for the selective ring opening of decalin. Results show that metallic and acid functions limit the reaction rate, sulphur significantly modifies product distribution, and the support has minimal impact on sulphur tolerance. Additionally, the amount of S per Ir surface atom plays a role in the poisoning of the catalyst.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Xin-Xin Fu, Jian-Peng Li, Zhuo-Qian Li, Yan Liu, Chen-Xiao Feng, Hai-Yang Wang, Zhi-Peng Zhao, Qiao-Yun Liu, Zhong-Yi Liu, Zhi-Kun Peng
Summary: In this study, Pd@HZSM5 was used as an example to encapsulate Pd nanoparticles in HZSM-5, improving the stability and 3-AP yield of the catalyst. The catalytic performance demonstrated the superiority of the encapsulation effect and provided a promising strategy for the green manufacturing of 3-AP.
JOURNAL OF CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Jing Shi, Xin Wang, Weizuo Li
Summary: Highly uniform nano-/micro-rods with a hexagonal shape of Fe-based MOFs (Mill-88-hmta) were synthesized using a solvothermal method and mixed-linker approach. The resulting Mill-88-hmta MOFs exhibit excellent performance in the ring-opening reaction of epoxides with alcohols, showing promise for other ring-opening reactions.
Article
Engineering, Chemical
Yu Yang, Samira Mandizadeh, Hao Zhang, Masoud Salavati-Niasari
Summary: Metal oxide-modified zeolite Y nanocomposites were synthesized and used for hydrodesulfurization, effectively reducing sulfur compound concentration to meet Euro-5 standard. ZnO-zeolite Y nanocomposites showed efficient removal of sulfur compounds under specific conditions, with high activity even after multiple recycles.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Niclas Conen, Martin Fuchs, Alexander Hoffmann, Sonja Herres-Pawlis, Andreas Jupke
Summary: A complete kinetic model has been developed to describe the behavior of guanidine carboxy Zn complexes in the lab-scale ring opening polymerization. The model can predict the conversion, molar mass, and dispersity of the obtained polymer, and can be applied to faster catalysts based on the archetype asme catalyst.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Physical
Zhikun Tong, Xiang Li, Jingyu Dong, Rui Gao, Qiang Deng, Jun Wang, Zheling Zeng, Ji-Jun Zou, Shuguang Deng
Summary: Developing a catalyst to upgrade furfural to alcohols is important for fine chemical synthesis. Metal phosphate nanoparticles with different compositions were synthesized, showing high catalytic efficiency for producing alcohols. The catalysts displayed high activity and stability during recycling experiments.
Article
Chemistry, Applied
Ana Flavia P. de Campos, Aurelia Retiella O. Ferreira, Laura Lorena da Silva, Pedro Paulo Modesto Neto, Dilson Cardoso
Article
Chemistry, Applied
Laura L. Silva, Iago W. Zapelini, Dilson Cardoso
Article
Chemistry, Physical
Iago W. Zapelini, Laura L. Silva, Cristiano L. P. Oliveira, Dilson Cardoso
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Laura Lorena Silva, Dilson Cardoso, Carsten Sievers, Leandro Martins
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Biodiversity Conservation
Denise Pinheiro Costa, Ernanda Nadal, Taina Carreira da Rocha
BIODIVERSITY AND CONSERVATION
(2020)
Article
Chemistry, Physical
Bruno M. Santos, Weitao Zhao, Jose L. Zotin, Monica A. P. da Silva, Laetitia Oliviero, Francoise Mauge
Summary: This study evaluates the effects of sulfide phase location on zeolite-containing catalysts in cyclohexene hydroconversion using the infrared operando technique. Results show a close relationship between sulfide phase location and activity, product yield, and surface species changes. Additionally, the proximity of sulfide phase sites to zeolitic acidic OH groups may influence the balance between isomerization and hydrogenation activity.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Applied
Iago William Zapelini, Dilson Cardoso
Summary: This study investigated the effect of crystallization time of aluminosilicate precursors of LTA zeolite on the propylamine anchoring capacity. It was found that solids prepared with shorter times in hydrothermal synthesis were more active in the Knoevenagel condensation reaction, demonstrating greater propylamine anchoring capacity. Additionally, amorphous precursors of LTA zeolite were found to be more active due to their greater accessibility of catalytic sites.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Karen N. Franke, Maria E. Ribeiro, Dilson Cardoso
Summary: The synthesis of zeolitic imidazolate frameworks (ZIFs) in aqueous medium using Zn(II) cations and 2-methylimidazolate anions was studied, with triethylamine playing a key role in facilitating the formation of ZIF-8 microporous structure. The presence or absence of the deprotonation agent significantly affected the structure and characteristics of the ZIFs, impacting their catalytic performance in Knoevenagel condensation reaction.Furthermore, ZIF-8 exhibited high catalytic stability and lower activation energy during consecutive reuses.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Juliana Floriano da Silva, Edilene Deise da Silva Ferracine, Dilson Cardoso
Summary: The synthesis of zeolites 4A with mesopores using an organosilane surfactant resulted in higher accessibility of catalytic sites in the Knoevenagel condensation reaction, leading to improved conversions and lower activation energy compared to conventional zeolite 4A.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Plant Sciences
Janaina Gomes-da-Silva, Fabiana L. R. Filardi, Maria Regina Barbosa, Jose Fernando A. Baumgratz, Carlos E. M. Bicudo, Taciana B. Cavalcanti, Marcus A. N. Coelho, Andrea F. Costa, Denise P. Costa, Eduardo Couto Dalcin, Paulo Labiak, Haroldo C. Lima, Lucia G. Lohmann, Leonor C. Maia, Vidal F. Mansano, Mariangela Menezes, Marli P. Morim, Carlos Wallace N. Moura, Eimear Nic Lughadha, Denilson F. Peralta, Jefferson Prado, Nadia Roque, Joao Renato Stehmann, Lana S. Sylvestre, Larissa Trierveiler-Pereira, Bruno M. T. Walter, Geraldo Zimbrao, Rafaela C. Forzza
Summary: The shortage of reliable taxonomic data hinders biodiversity research, but recent studies on algae, plants, and fungi in Brazil have demonstrated the country's species richness and endemism. Scientific collaboration has proven to be powerful in achieving ambitious goals.
Article
Chemistry, Physical
Luana do Nascimento Rocha de Paula, Gustavo Medeiros de Paula, Dilson Cardoso
Summary: CTA-MCM-41 hybrid silica was prepared using a 40 degrees C non-hydrothermal method and characterized using various techniques. The catalytic tests showed that the conversion of ethyl acetate decreased with the increase of the ester side-chain length.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Chemistry, Physical
Janaina Guedes Eid, Gustavo Medeiros de Paula, Dilson Cardoso
Summary: In this study, MCM-41 hybrid silicas were synthesized using a novel polymerizable surfactant CVIMBr, which showed lower catalytic activity but higher stability in up to 5 successive uses in the transesterification reaction of ethyl acetate with methanol.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Gustavo Medeiros de Paula, Janaina Guedes Eid, Dilson Cardoso
Summary: Glycerol carbonate was synthesized through transesterification of glycerol and various esters using CTA-MCM-41 hybrid silica as a catalyst. The catalyst had a hexagonal structure and exhibited high catalytic activity. Cyclic-chain esters showed higher reactivity and produced fewer by-products compared to straight-chain esters.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2023)
Article
Education & Educational Research
Denise Reis Costa, Chia-Wen Chen
Summary: In this study, a latent regression model was used to analyze the relationship between latent constructs and contextual variables among Scandinavian students during their completion of interactive mathematics tasks. The findings showed differences in profiles among Scandinavian students, including the relationship between economic social cultural status (ESCS) and math proficiency, gender differences in math proficiency, and the effect of experience with math tasks and ICT resources on students' performance.
LARGE-SCALE ASSESSMENTS IN EDUCATION
(2023)
Article
Psychology, Multidisciplinary
Denise Reis Costa, Maria Bolsinova, Jesper Tijmstra, Bjorn Andersson
Summary: By analyzing the time spent by students on mathematics tests, this study found that incorporating response times and task time measurements can improve the accuracy of ability estimates. It also revealed differences between countries in how students approach test items and their response processes. Additionally, the study showed that including response times can capture additional information through differences in modeling structure, although this may not align with the testing objective.
FRONTIERS IN PSYCHOLOGY
(2021)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.