Article
Engineering, Environmental
Zhonghao Peng, Ze Liu, Yu Gao, Jiayu Liu, Dongmin Wang, Hongying Liu, Yanbo Zhang, Li Li
Summary: This paper investigates the effects of various factors on the synthesis of DDR zeolite using silica fume as raw material, and determines the optimum synthesis condition, which reduces the cost of synthesis and achieves the utilization of waste materials.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
A. Zhadan, V Sarou-Kanian, L. Del Campo, L. Cosson, M. Malki, C. Bessada
Summary: The study focuses on a detailed consideration of transport properties in molten carbonate fuel cells, utilizing a combination of different methodological developments and data on 23Na and 7Li self-diffusion coefficients and electrical conductivity. The results were compared with known experimental data and transport property calculations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Amineh Baniani, Matthew P. Rivera, Ryan P. Lively, Sergey Vasenkov
Summary: C-13 pulsed field gradient (PFG) NMR was used to measure the self-diffusion of a p-xylene/o-xylene mixture inside zeolitic imidazolate framework-71 (ZIF-71) crystals. The study found that the self-diffusivities of the mixed-matrix membrane and ZIF-71 crystal beds were influenced by the external crystal surface. The study also obtained the self-diffusivities unaffected by crystal surface effects and the diffusion selectivity for the studied sorbate mixture.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Samuel Berens, Febrian Hillman, Mohamad Rezi Abdul Hamid, Hae-Kwon Jeong, Sergey Vasenkov
Summary: Pulsed field gradient (PFG) NMR at high magnetic field was used to study molecular self-diffusion of ethylene, ethane, and propylene in a 2-ethylimidazole (eIm) linker-doped ZIF-8. The results indicated that the elm linker substitution tends to increase gas intracrystalline diffusivities, especially for larger elm linker fractions at low loading pressures, without affecting the ethylene/ethane diffusion selectivity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Tatiana Chenet, Annalisa Martucci, Mirco Cescon, Giulia Vergine, Giada Beltrami, Lara Gigli, Matteo Ardit, Massimo Migliori, Enrico Catizzone, Girolamo Giordano, Luisa Pasti
Summary: The adsorption of L-lysine on two ZSM-5 materials with different Si/Al ratios revealed that the aluminum content plays a crucial role in tuning the adsorption process. Higher Si/Al ratios led to lower saturation capacity and binding constants. High resolution X-ray diffraction data showed that the adsorption of L-lysine in ZSM-5 is a surface-confined supramolecular self-assembly process, influenced by pH and hydration state.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Energy & Fuels
Shuo Li, Xiaoqiang Zhang, Shijia Dong, Yupeng Du, Xiaoping Chen, Pengzhao Wang, Xiang Feng, Chaohe Yang
Summary: This study investigated the influence mechanism of Si/Al ratio on the isobutane/butene (I/O) ratio in the pore of H-BEA zeolite using CB-GCMC methods under realistic alkylation conditions. It was found that the I/O ratio in the pore decreased dramatically with decreasing Si/Al ratio due to the higher adsorption heats of 1-butene over the acid sites. There is an optimal Si/Al ratio for C4 alkylation, which is consistent with experimental results. Furthermore, external surface modification of the catalyst was identified as an effective method to improve the I/O ratio in the pore.
Correction
Chemistry, Multidisciplinary
Sebastian Greiser, Gregor J. G. Gluth, Patrick Sturm, Christian Jaeger
Summary: In this study, the authors investigated the cementitious sodium aluminosilicate gels (geopolymers) and gel-zeolite composites using double-resonance NMR spectroscopy, and corrected the relationships between Si-29{Al-27}, Al-27{Si-29}, and Al-27{H-1}.
Article
Thermodynamics
Hamid Rajaei, Feridun Esmaeilzadeh, Dariush Mowla
Summary: The Si/Al ratio of 50 in HZSM-5 zeolites was found to have the highest specific surface area and porosity, while decreasing the Si/Al ratio resulted in higher enthalpy of Bronsted sites and increased acidity strength. This shift also led to changes in the length of the O-H moiety or the acidity strength of Bronsted sites, as indicated by NH3-TPD profiles.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Biochemistry & Molecular Biology
Aleksandra M. Kusova, Ilnaz T. Rakipov, Yuriy F. Zuev
Summary: The intracellular environment involves the interaction of proteins, sugars, and nucleic acids in a restricted medium. The excluded volume effect in the cytoplasm accounts for 40% of the available volume for macromolecules. This study examines the diffusion of proteins in crowded solutions and demonstrates the deviation from conventional Brownian motion under conditions of altered medium viscosity and rigid obstacles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Mechanics
Jiangfeng Guo, Michael M. B. Ross, Benedict Newling, Maggie Lawrence, Bruce J. Balcom
Summary: This paper introduces a low-cost permanent magnet design for measuring laminar flow, proposes a series of MR measurement methods for characterizing fluid flow, validates their accuracy, and points out the advantages of simple hardware and measurement methods.
Article
Engineering, Environmental
Hyun June Choi, Suk Bong Hong
Summary: This study compares the CO2 adsorption properties of gismondine zeolites with different Si/Al ratios, and finds that the framework Al content affects the adsorption mechanism of these small-pore zeolites. Zeolites with lower Si/Al ratios have hindrance in CO2 adsorption due to the large number of extra framework cations, while zeolites with higher Si/Al ratios achieve CO2 adsorption through cation gating and molecular sieving effects.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Amineh Baniani, Matthew P. Rivera, Joao Marreiros, Ryan P. Lively, Sergey Vasenkov
Summary: Mixed-matrix membranes (MMMs) are a promising membrane type for gas and liquid separations. They can be formed by dispersing metal-organic framework (MOF) crystals in polymers. The polymer crosslinking process used in this study did not affect the intra-MOF diffusivities but resulted in a decrease in the effective size of ZIF-71 crystals inside the MMMs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Engineering, Environmental
Hyun June Choi, Donghui Jo, Suk Bong Hong
Summary: The study investigates the CO2 adsorption properties of potassium merlinoite zeolites with different Si/Al ratios and reveals the significant impact of framework Si/Al ratio on the CO2 adsorption mechanism.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Amineh Baniani, Matthew P. Rivera, Ryan P. Lively, Sergey Vasenkov
Summary: The study investigated the effect of MOF confinement in Torlon on diffusion by dispersing ZIF-71 crystals in Torlon polymer, and found that there was no influence of the ZIF-71 confinement on diffusion.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Electrochemistry
Laurence Savignac, Jeremy I. G. Dawkins, Steen B. Schougaard, Janine Mauzeroll
Summary: The study found that saturating the electrolyte with CO2 does not have a significant effect on DLi+ and does not hinder Li+ mass transport.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jose Luis Santos, Cristina Megias-Sayago, Svetlana Ivanova, Miguel Angel Centeno, Jose Antonio Odriozola
Summary: The textural properties of biomass waste-derived biochar catalysts play a significant role in influencing catalytic behavior, particularly in formic acid dehydrogenation and overall hydrogen production.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Charf Eddine Bounoukta, Cristina Megias-Sayago, Svetlana Ivanova, Anna Penkova, Fatima Ammari, Miguel Angel Centeno, Jose Antonio Odriozola
Summary: A series of -SO3R functionalized activated carbons (R=H, O, aryl) were prepared and utilized in fructose dehydration reaction to produce 5-hydroxymethylfurfural. Different sulphonating methods were used to introduce groups on the catalyst surface, affecting the textural and chemical properties of the activated carbon as well as the yields and selectivity of the reaction. The feasibility of a solvent-free reaction was investigated and compared to a reaction with DMSO, with the best catalytic results obtained in the presence of DMSO.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Multidisciplinary
Renata Avena Maia, Felipe Lopes Oliveira, Vincent Ritleng, Qiang Wang, Benoit Louis, Pierre Mothe Esteves
Summary: The study on the CO2 capture properties of COFs revealed that their adsorption capacity is influenced by the material's texture and chemical properties, with the relative number of hydroxyl groups in the COF backbone acting as an adsorption threshold. This research provides insights into the potential applications of COFs in CO2 capture.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
Charf Eddine Bounoukta, Cristina Megias-Sayago, Fatima Ammari, Svetlana Ivanova, Antonio Monzon, Miguel Angel Centeno, Jose Antonio Odriozola
Summary: This study investigates the role of Lewis/Bronsted acid sites in glucose dehydration, finding that catalyst activity is dependent on catalyst composition. Lewis acid promotes isomerization, while Bronsted acid directly dehydrates glucose to HMF. Furthermore, the study includes kinetic modeling of the reactions and their comparison with empirical observations.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Marcelo M. Pereira, Fabiana M. Santos, Alessandra Silva, Nuno Batalha, Fabio Junior Ferreira da Silva Henrique, Pierre M. Esteves, Benoit Louis
Summary: This study aims to understand the influence of extraframework aluminum (EFAL) in the activation mechanism of isobutane over acidic zeolites, showing that the sC-H bond in isobutane selectively undergoes a protolytic reaction at low temperature solely in the presence of EFAL acid sites. These results shed light on the mechanism of small alkane activation over acidic zeolites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Michael Teixeira, Renata A. Maia, Lydia Karmazin, Benoit Louis, Stephane A. Baudron
Summary: The study investigates the use of a deep eutectic solvent for the ionothermal synthesis of Ca(ii) based metal-organic frameworks, successfully synthesizing a series of Ca-MOFs with different dicarboxylic acid ligands. The structural characterization and solvent coordination analysis of these materials were carried out, showing potential for the deep eutectic solvent to be an effective solvent for the synthesis of water-sensitive Ca-MOFs.
Article
Energy & Fuels
Charf Eddine Bounoukta, Cristina Megias-Sayago, Svetlana Ivanova, Fatima Ammari, Miguel Angel Centeno, Jose Antonio Odriozola
Summary: This study explores various catalytic systems to improve the yield of levulinic acid while understanding the catalytic behavior of cost-effective catalysts. The choice of catalytic systems and the impact of main reaction parameters on activity and selectivity are analyzed.
Article
Chemistry, Applied
Michael Teixeira, Renata A. Maia, Sangaraju Shanmugam, Benoit Louis, Stephane A. Baudron
Summary: Deep eutectic solvents (DES) based on different urea derivatives have been shown to be efficient alternatives for the ionothermal synthesis of Mg-MOF-74, with significant impact on the material's morphology and sorption properties. The choice of solvent and synthesis conditions leads to the formation of intermediate crystalline phases and influences the final morphology, thus affecting the material's characteristics.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Anais Becker, Nizami Israfilov, Elise Ehrstein, Irene Lara-Ibeas, Jean-Marc Planeix, Benoit Louis, Stephane Le Calve
Summary: The study aims to explore the adsorption capacity of different microporous materials for formaldehyde in a realistic environment. Experimental results show that Cu-based metal-organic frameworks (MOFs) have higher formaldehyde adsorption capacity than ion-exchanged zeolites under realistic indoor conditions, particularly SUM-102 (Strasbourg University Material) performing the best.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Y. Zhang, B. Louis
Summary: A modified ZSM-5 zeolite with high external surface area (ESA) and mild acidity was efficiently synthesized using a biochar obtained from algae as a hard template. The modified zeolite exhibited an ESA of 171 m2/g, compared to 121 m2/g for pristine ZSM-5. It also showed improved catalytic lifetime in the methanol-to-hydrocarbons (MTH) reaction, with a methanol conversion >95% for 16 hours, compared to only 10 hours for H-ZSM-5.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Physical
Charf Eddine Bounoukta, Cristina Megias-Sayago, Nuria Rendon, Fatima Ammari, Anna Penkova, Svetlana Ivanova, Miguel angel Centeno, Jose Antonio Odriozola
Summary: In this study, different methods were used to functionalize carbon nanofibers (CNFs) for the preparation of Ru based catalysts. The organometallic approach proved to be suitable for CNF functionalization, resulting in well-defined Ru NPs compared to conventional mineral acid treatments. The catalysts were tested in levulinic acid hydrodeoxygenation, with the impact of CNF functionalization on the catalysts' performance discussed in comparison with unmodified commercial CNFs.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Qianwen Zheng, Benoit Louis
Summary: Biomass waste was found to be a promising bio-template for modifying and potentially tailoring the properties of zeolites. Seven different types of abundant biomasses were evaluated for their role in zeolite crystallization. The presence of biomass mainly affected the surface acidic properties of the synthesized ZSM-5 zeolites. This study led to the synthesis of potential catalysts with high catalytic performance and provided insights for future investigations in controlling zeolite nucleation and growth.
Article
Materials Science, Multidisciplinary
Gaetan Lutzweiler, Yu Zhang, Fanny Gens, Aline Echalard, Guy Ladam, Jeremy Hochart, Theo Janicot, Nadine Mofaddel, Benoit Louis
Summary: This study reveals the potential of zeolites in delivering bioactive ions and highlights their application in tissue engineering. The study shows that zeolites can gradually release ions, and the ion concentration can be adjusted by varying the mass of the zeolite. The cell responses to ion concentration are also correlated with the zeolite concentration.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Nizami Israfilov, Karel Soukup, Benoit Louis, Jean-Marc Planeix
Summary: Polyethylene glycol-modified terphenyl tetracarboxylic ligands were used to prepare copper-based MOFs, SUM-102 and SUM-103. The study investigated the influence of side chains on the stability and adsorption capacities of the MOFs, and demonstrated that SUM-103 exhibited high stability and adsorption capacity in water.
NEW JOURNAL OF CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Renata A. Maia, Benoit Louis, Stephane A. Baudron
Summary: Deep eutectic solvents (DESs), as an emerging class of solvents, play a significant role in the preparation and post-synthetic modification of metal- and covalent organic frameworks. They can act not only as solvents but also as structure-directing agents during MOF/COF formation. The different roles DESs play in this area are the key focus of research.