Article
Engineering, Chemical
Hiroyuki Komatsu, Tatsuya Horiguchi, Nobuyuki Sakamoto, Hideo Tajima
Summary: The rheological properties of tetra-n-butylammonium bromide (TBAB) and tetra-n-butylphosphonium bromide (TBPB) semi-clathrate hydrate (SCH) slurries with polyvinyl alcohol (PVA) were measured using a viscometer to evaluate the anti-agglomeration effect of PVA. Adding PVA changed the rheological properties of slurries to a Bingham fluid even under CO2 bubbling conditions. TBAB and TBPB hydrate slurries exhib-ited a stronger dilatant trend with yield stress and more aggregates with increasing solid fraction, and TBPB had higher frictional force and aggregability compared to TBAB hydrate slurries.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Jin Shimada, Moe Yamada, Atsushi Tani, Takeshi Sugahara, Katsuhiko Tsunashima, Yusuke Tsuchida, Takayuki Hirai
Summary: The thermodynamic properties of SCHs are influenced by the steric conformations of the guest anions. Different guest anions have varying effects on the equilibrium temperatures of SCHs, with some exhibiting similar temperatures while others show higher temperatures. Anion size and conformation play a critical role in determining the stability and properties of SCHs.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Engineering, Environmental
Jie Xu, Qinglin Chen, Jianwei Du
Summary: Inducing pure methane hydrate from double methane semi-clathrate hydrate is a promising method to enhance methane storage efficiency. This study used a halogen-free semi-clathrate hydrate former to conduct comprehensive experiments, showing significant improvements in methane uptake.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Jin Shimada, Masami Shimada, Sakura Azuma, Takeshi Sugahara, Katsuhiko Tsunashima, Takayuki Hirai
Summary: The phase equilibrium (temperature-composition) relations of the TBP-TFA + water binary system were investigated, including solid-liquid and liquid-liquid equilibria. The phase diagram of TBP-TFA SCH showed peritectic behavior, with a decomposition temperature of 275.9 +/- 0.1 K and a stoichiometric composition of 0.027 +/- 0.002 mole fraction. The decomposition enthalpy of TBP-TFA SCH was determined to be 199 +/- 2 J/g. Above the LCST, liquid-liquid phase separation occurred, and the composition at the LCST was found to be similar to the stoichiometric composition of TBP-TFA SCH, indicating similar cluster-based solution structures.
FLUID PHASE EQUILIBRIA
(2023)
Article
Thermodynamics
Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Takayuki Hirai
Summary: This study investigates environmentally friendly semiclathrate hydrates (SCHs) and finds that they are suitable phase change materials for cold energy storage. They can be used as refrigerants in the logistics of vegetables and fruits to preserve their freshness.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Physics, Applied
Jin Shimada, Atsushi Tani, Takeshi Yamada, Takeshi Sugahara, Takayuki Hirai, Takuo Okuchi
Summary: The dynamics of water molecules in tetra-n-butyl-d36-ammonium bromide semiclathrate hydrate were studied, revealing a fast reorientation motion of water molecules in the temperature range of 212-278 K. The mean jump distance of hydrogen atoms was found to be within 1.5-2.0A degrees, with a relaxation time of 100-410 ps and an activation energy of 10.2 +/- 5.8 kJ/mol. This short relaxation time is possibly due to the strong interaction between a bromide anion and its surrounding water molecules, suggesting a unique strategy for designing efficient, safe, and inexpensive proton conductors using semiclathrate hydrates.
APPLIED PHYSICS LETTERS
(2023)
Article
Crystallography
Wataru Shimada, Motoi Oshima, Tsuyoshi Masaki, Hiroki Tsutsui, Kenshyu Momma, Kaori Takai
Summary: This study investigates the nucleation probability and induction times for recrystallization of type A TBAB hydrate via the memory effect. The results suggest that free water in solution plays an important role in nucleating TBAB hydrate crystal with the memory effect. The study also found that nucleation occurred near the location of prior dissociation and the nucleation probability decreased with an increase in the temperature of dissociation.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Thermodynamics
Takashi Morimoto, Yuki Koga, Rikuto Suzuki, Satoshi Takeya, Takaaki Inada, Hiroyuki Kumano
Summary: The study found that mixed metal particles prepared by grinding have a significant nucleation-promoting effect on TBAB hydrate. The changes in the physicochemical properties of the mixed metal particles during grinding were believed to accelerate the nucleation of TBAB hydrate.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Engineering, Chemical
Xi-Yue Li, Jin Yan, Dong-Liang Zhong, Shi-Jian Lu, Bin-Bin Ge
Summary: This study investigated the formation of tetra-n-butyl ammonium bromide (TBAB) semiclathrate hydrate for CO2 capture through experiments and in situ Raman spectroscopy. The impacts of TBAB concentration and operating temperature on CO2 incorporation into TBAB semiclathrates were analyzed. The results showed that the structure transition of TBAB semiclathrates from type A to type B occurred in the presence of CO2, resulting in increased CO2 consumption. The TBAB semiclathrate formed at 2.57 mol % TBAB and 282.15 K was found to be a suitable system for CO2 capture.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Yingmei Wang, Aili Niu, Wenze Jiao, Ji Chen, Peng Zhang, Jinping Li
Summary: Carbon dioxide hydrate formation rate is improved by using different accelerator systems. The combination of nanographite-TBAB and SDS-TBAB shows better performance in reducing the nucleation time. TBAB shows the best nucleation amount, formation rate, and conversion rate among the single acceleration systems.
Article
Thermodynamics
Feng-Mei Xie, Xi-Yue Li, Dong-Liang Zhong, Peter Englezos, Guo-Xiang Lu
Summary: This study demonstrates the phase behavior of TBPB and CO2 hydrates at different concentrations, with the addition of surfactant affecting phase equilibrium and CO2 consumption during formation. Further research should focus on increasing the CO2 storage capacity of TBPB semiclathrate hydrate.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Engineering, Chemical
Zengqi Liu, Shuting Zhang, Yingying Liu, Qiang Sun, Zhen Xu, Aixian Liu, Yiwei Wang, Xuqiang Guo
Summary: This study evaluated the Peq of CH4-CO2 gas mixtures with different TBAB solutions at different temperatures by considering the effects of multiple solute interactions and the deformation of D-cages. The proposed model can accurately predict Peq by incorporating the effects of gas dissolution, the presence of electrolytes, and the deformation of D-cages. It provides a quantitative description of these effects on Peq values for corresponding systems.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Sanehiro Muromachi
Summary: This study investigates the CO2 capture properties of semiclathrate hydrates formed with different salts, showing that they almost exclusively capture CO2. Among the salts, TBPB exhibits superior gas capture performance, while TBAC captures the least amount of CO2.
Article
Chemistry, Multidisciplinary
Sanehiro Muromachi, Satoshi Takeya, Saman Alavi, John A. Ripmeester
Summary: The crystal structure of tetra-n-butylammonium chloride (TBAC) + CO2 semiclathrate hydrate, known for its high CO2 selectivity, was studied using single crystal X-ray diffraction. The study revealed that the CO2 gas occupies dodecahedral (D) cages along with water and chloride ions. Different types of D cages were observed, with the ratio of D-L:D-M:D-N as 2:2:1. The CO2 molecules were found in distorted D-M and D-N cages, while chloride ions were partially present in D-M cages. The spatial distribution of CO2 in the cages was limited due to the distortion of D-M and D-N cages. The study also highlighted the superior CO2 capture preference of TBAC hydrate.
Article
Engineering, Environmental
Hyunho Kim, Junjie Zheng, Ponnivalavan Babu, Sreekala Kumar, Jackson Tee, Praveen Linga
Summary: This study investigated the kinetics of TBAB hydrate formation as a cold storage material. The initial TBAB concentration and mixing rate were found to affect the formation process. The addition of pre-produced hydrate seed was shown to induce quicker nucleation. The type of seed also influenced the type of hydrate formed. The sensitivity analysis using an artificial neural network model identified TBAB concentration, temperature, and seed type as the major contributors to the kinetic performance of TBAB hydrate formation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Mahdjouba Akerma, Hong-Minh Hoang, Denis Leducq, Anthony Delahaye
INTERNATIONAL JOURNAL OF REFRIGERATION
(2020)
Article
Thermodynamics
Steven Duret, Erwann Hamon, Hong-Minh Hoang, Valerie Stahl, Evelyne Derens-Bertheau, Anthony Delahaye, Onrawee Laguerre
INTERNATIONAL JOURNAL OF REFRIGERATION
(2020)
Article
Energy & Fuels
Fatima Doria Benmesbah, Livio Ruffine, Pascal Clain, Veronique Osswald, Olivia Fandino, Laurence Fournaison, Anthony Delahaye
Article
Food Science & Technology
Steven Duret, Hong-Minh Hoang, Laurent Guillier, Evelyne Derens-Bertheau, Claire Dargaignaratz, Stephanie Oriol, Anthony Delahaye, Onrawee Laguerre, Christophe Nguyen-the
Summary: Food refrigeration is crucial for maintaining microbiological quality but comes with high energy consumption. Increasing refrigeration temperature in the processing plant can reduce electrical power consumption, but may also lead to an increase in microbiologically defective products. Raising the cooling tunnel temperature saves more energy compared to increasing cold room temperature while achieving similar impacts on microbiology.
Article
Engineering, Chemical
Nada Chami, Sabrina Bendjenni, Pascal Clain, Veronique Osswald, Anthony Delahaye, Laurence Fournaison, Didier Dalmazzone
Summary: This study used a high-pressure micro differential scanning calorimeter to measure the dissociation conditions of mixed cyclopentane + CO2 hydrates, which showed that it is possible to form hydrates at reduced pressure and near ambient temperature, suitable for most industries.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Walid Samah, Pascal Clain, Francois Rioual, Laurence Fournaison, Anthony Delahaye
Summary: Superhydrophobic surfaces (SHS) are highly sought after in various industrial fields. However, their application in cold, humid, and submerged environments can lead to loss of their superhydrophobic properties. This study experimentally characterizes the wetting behavior of a surface coated with a commercial superhydrophobic Ultra Ever Dry (UED) coating at different surface temperatures and relative humidity. The results reveal that the superhydrophobic coating loses its non-wetting properties at low temperatures and high relative humidity due to condensation on the surface.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Chemical
Fatima Doria Benmesbah, Pascal Clain, Olivia Fandino, Veronique Osswald, Laurence Fournaison, Christophe Dicharry, Livio Ruffine, Anthony Delahaye
Summary: Understanding the mechanisms of gas hydrate formation and dissociation in porous media is crucial for the development of new energy-efficient and environmentally friendly technologies related to cold storage. This study investigates CO2 hydrate formation and dissociation in two different porous materials, sand and silica gel. The results show that factors such as water saturation, particle size, and morphology of the porous media can affect the process, with silica gel showing a higher amount of hydrate formed compared to sand.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Thermodynamics
Nada Chami, Yasmine Salehy, Dennis Burgner, Pascal Clain, Didier Dalmazzone, Anthony Delahaye, Laurence Fournaison
Summary: The use of CO2 hydrates as phase change materials in secondary loop refrigeration is promising. This study found that the formation pressure of hydrates can be significantly lowered by using promoters. The rheological properties of CP and mixed CP + CO2 hydrate slurries were studied, and they exhibited a shear thinning behavior.
Review
Thermodynamics
Walid Samah, Pascal Clain, Francois Rioual, Laurence Fournaison, Anthony Delahaye
Summary: The current climate crisis demands a significant reduction in energy consumption and greenhouse gas emissions. Secondary refrigeration, especially the use of low environmental impact two-phase secondary fluids like PCM slurry, can effectively reduce the use of refrigerants with high greenhouse gas content. To optimize ice slurry production, methods such as preventing ice nucleation or reducing ice adhesion to generator walls have been proposed. These methods aim to achieve continuous production, low energy consumption, and reliable operation of ice slurry generators.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Yasmine Salehy, Anthony Delahaye, Hong Minh Hoang, Laurence Fournaison, Francois Cluzel, Yann Leroy, Bernard Yannou
Summary: This paper proposes a generic approach to assess the potential of adoption for sustainable refrigeration systems by describing their multiple performances. Through modeling and simulation of four supermarket refrigeration systems, the study shows that the electricity mix is the most influential parameter on cost and environmental impact. While CO2 refrigerant systems show promising performances, the maintenance score can be a limiting factor for their installation. The study also explores the impact of photovoltaic panels and financial support on improving cost and environmental performances.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Y. Salehy, P. Clain, A. Boufares, N. Chami, J-P. Torre, D. Dalmazzone, L. Fournaison, A. Delahaye
Summary: Recent studies have explored the potential use of hydrate slurries in indirect refrigeration systems, but pipeline clogging issues due to hydrate agglomeration can arise. Additives, such as Dioctyl sodium sulfosuccinate (AOT), are commonly utilized to mitigate these problems. This study investigates the rheological properties of CO2 hydrate slurries, specifically the impact of AOT. A capillary viscometer method and a dynamic loop were employed to assess fluid behavior and collect experimental data. The study reveals a shear-thinning behavior and emphasizes the potential of AOT in significantly improving the properties of CO2 hydrate slurries.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Walid Samah, Pascal Clain, Francois Rioual, Laurence Fournaison, Anthony Delahaye
Summary: This study focuses on the growth, adhesion, and detachment phenomena of ice by liquid jets on different types of surfaces. The results show that ice adheres less to superhydrophobic surfaces and hydrophobic surfaces detach the ice layer faster compared to untreated surfaces.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
J. N. Zappey, E. E. Moore, O. Benes, J. -c. Griveau, R. J. M. Konings
Summary: In this study, the heat properties of technetium metal were measured and analyzed using various thermal measurement methods, including its superconductivity, zero-degree Debye temperature, electronic heat capacity coefficient, and the standard entropy of the superconducting state.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Pengshuai Zhang, Jixiu Deng, Xiaoyu Jiang, Liang Xu, Yu Huang, Han Sun, Mi Gao, Xianghan Wang, Yulong Gao, Kangning Fan, Lu Zhang, Shuoye Yang
Summary: In this study, the solubility of daminozide in twelve neat solvents was determined using the gravimetrical method. Various models were employed to analyze the experimental solubility, and the miscibility of daminozide in the selected solvents was discussed based on Hansen solubility parameters. The results showed that the dissolution mechanism of daminozide in all solvents was entropy-driven.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Jinju Ma, Hao Wu, Dongxu Yi, Wei Liu, Xinding Yao, Tao Li, Baozeng Ren
Summary: In this study, the solubility and compatibility of Agomelatine in different solvents were investigated through experimental and simulation methods. The results showed that Agomelatine forms more stable hydrogen bonds with alcohol solvents compared to other ester solvents. Additionally, the study analyzed the acidity and basicity characteristics of Agomelatine as well as the reasons for differences in solubility.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Angelica V. Sharapova, Marina V. Ol'khovich, Svetlana V. Blokhina
Summary: This study determined the key physico-chemical properties of cardiovascular carvedilol (CVD) in terms of solubility and distribution coefficients in modeling solvents and biphasic systems. The results showed that the solubility of CVD varied significantly depending on the solvent and pH conditions, and the dissolution process deviated from ideality in saturated solutions.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Wenxi Song, Na Wang, Mingzhe Tan, Meng Wang, Xin Huang, Ting Wang, Hongxun Hao
Summary: The solubility and thermodynamic behavior of climbazole in different solvents were investigated in this study. The results showed that solubility is influenced by temperature and solvent properties. Furthermore, the solvent effect was evaluated and the molecular mechanism behind the solubility behavior was revealed using solvation energy relationship models and molecular simulation methods.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yuqi Su, Weijie Jia, Junshuai Chen, Songtao Cao, Maogang He, Ying Zhang
Summary: This paper presents a novel measurement method based on the finite volume method (FVM) for measuring the concentration-dependent mutual diffusion coefficient D(C) in binary solution. The measurement principle was derived by integrating Fick's second law and establishing discretization equation. The method was validated through experiments and a semi-empirical correlation was built to study the temperature and concentration influences on the diffusion coefficient D.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Bo Tang, Xiaoyu Yao, Xueqiang Dong, Bowen Sheng, Yanxing Zhao, Jun Shen, Maoqiong Gong
Summary: In this study, metal-bellows variable volumetry was used to measure the saturated vapor pressures and critical parameters of R1234ze(Z) and R1336mzz(Z). New vapor pressure correlations were formulated based on the obtained data. The low uncertainties of the measured values indicate the reliability and reproducibility of the data. The results provide important thermophysical data for the use and optimization of R1234ze(Z) and R1336mzz(Z) in HTHP systems.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Vivek Pathania, Ankita Garg, Navneet Kaur, Neha
Summary: The interaction between Isoniazid and beta-cyclodextrin in solutions was investigated to understand the molecular interactions between different components. The results showed that the interaction between Isoniazid and beta-cyclodextrin affected the volume and compressibility of the solutions, and the hydration behavior of Isoniazid in the solutions was influenced by the cosolvent.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Mauricio Vega-Teijido, Marc E. Segovia, Martina Kieninger, Oscar N. Ventura
Summary: A composite chemical model, SVECV-f12, has been developed to accurately reproduce barrier heights of hydrocarbon species. The model successfully corrects systematic errors between experimental and theoretical values and is used for predicting formation enthalpies and hydrogenation/isomerization enthalpies.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Kemal Ozcan, Aylin Boztepe, Erdog an Tarcan, Cagatay Tasdemirci
Summary: In this study, the enthalpy of combustion of methane, the main component of natural gas, was measured using a reference gas calorimeter. The experimental results were compared with the values specified in ISO 6976:2016. The average enthalpy of combustion was determined as -55518.2 kJ kg-1 with an error of 0.2%.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Kouki Mekaru, Takuto Miyagi, Ayaka Mishima, Isami Uehara, Ryo Ohmura, Keita Yasuda
Summary: This study investigated the four-phase equilibrium conditions of carbon dioxide + cyclopentane double clathrate hydrate forming systems coexisting with sodium chloride aqueous solution or pure water. The results showed that the double clathrate hydrate is more thermodynamically stable than simple clathrate hydrates under a given sodium chloride concentration.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yameng Wan, Xiaoqiang Gao, Ruiai Wang, Fanfan Li, Yanxun Li, Haixia He
Summary: This study evaluated the solubility of Iminostilbene (IMB) in twelve organic solvents and found that the solubility increased with temperature and showed a specific order in different solvents. The analysis of molecular interactions and solubility parameters provided insights into the dissolution behavior. The UNIQUAC model was used to fit the solubility data, and the thermodynamic properties of the mixing and dissolution processes were thoroughly evaluated.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yinan Liu, Mingcheng Li, Chunying Zhu, Xiqun Gao, Youguang Ma
Summary: This study successfully prepared amine-based functionalized deep eutectic solvents and investigated the effects of solvent composition, water content, and temperature on the properties of the solvent through density and viscosity measurements. The results contribute to a better understanding of hydration and intermolecular interactions in deep eutectic solvents.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Correction
Thermodynamics
Deepak Parmar, Kavitha Kumari, Naveen Kumar, Manju Rani, Mustapha Sahal, Sanjeev Maken
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Ruslan N. Nagrimanov, Aliya R. Ibragimova, Boris N. Solomonov
Summary: In this study, the heats of solution of hydrocarbons and alcohols with 2-methyltetrahydrofuran are systematically analyzed. Structure-property relationships are developed to calculate the enthalpy of solvation of aliphatic alcohols in 2-methyltetrahydrofuran. Specific interactions in the alcohol-2-methyltetrahydrofuran systems are determined to better understand intermolecular interactions in 2-methyltetrahydrofuran solutions. This research provides valuable insights into the properties and energies of these interactions, facilitating the transition to more environmentally friendly solvents.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)