Article
Chemistry, Physical
Yajuan Qu, Yigang Liu, Hongru Zhang, Yasen Dai, Zhaoyou Zhu, Yixin Ma, Jianguang Qi, Yinglong Wang
Summary: This study successfully separated trioxane water and ethanol water azeotropic systems using methylimidazole ionic liquids as extractants, selected based on COSMO calculation. The screening results were confirmed through vapor-liquid equilibrium experiments.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Thermodynamics
Irina A. Graur, Marina A. Batueva, Moritz Wolf, Elizaveta Ya. Gatapova
Summary: This article conducts numerical simulations of monatomic vapor condensation on its liquid phase using three different methods. The results show good agreement among these methods for monatomic gases. The Moment Method is found to have great potential for efficient estimation of condensation fluxes while respecting the conservation of mass, momentum, and energy. The study also discusses the presence and effects of an inverted temperature gradient during the condensation process, and proposes a methodology for extracting the condensation coefficient based on the Moment Method results.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Irina A. Graur, Elizaveta Ya. Gatapova, Moritz Wolf, Marina A. Batueva
Summary: The study simulated the evaporation process and found that the S-model kinetic equation is a time-effective model for simulating the structure inside and beyond the Knudsen layer, while the moment method of the solution of the Boltzmann equation also yielded results in good agreement with molecular dynamics data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Jiafu Xing, Xingyi Liu, Yasen Dai, Yanli Zhang, Zihao Su, Zhengrun Chen, Jun Gao, Yinglong Wang, Peizhe Cui
Summary: This study verifies the feasibility and effectiveness of deep eutectic solvents (DESs) for the separation of ethanol and diclofenac salt through experiments and molecular dynamics simulations, which is important for the sustainable utilization of resources.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Zihao Su, Dingchao Fan, Ke Xue, Yanli Zhang, Xingyi Liu, Zhaoyou Zhu, Yinglong Wang
Summary: In this study, deep eutectic solvents (DESs) were used to treat azeotropic systems in acetonitrile wastewater. The performance of DESs in liquid-liquid equilibrium conditions was investigated through experiments and molecular dynamics simulations, confirming the feasibility of separating azeotropic mixtures using DESs and exploring the underlying mechanisms. The results showed that hydrophobic DESs had a good extraction effect on acetonitrile, with electrostatic force playing a leading role.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Lisa Sappl, Christos N. Likos, Andreas Zoettl
Summary: The simulation of polymer solutions requires the development of methods that accurately include hydrodynamic interactions and improve computational efficiency. This research explores a new model for simulating ring polymers and discovers a method that yields satisfying diffusion behavior by regulating the interaction intensity with the solvent.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Xingyi Liu, Jiafu Xing, Mengya Sun, Zihao Su, Zhengrun Chen, Yinglong Wang, Peizhe Cui
Summary: Deep eutectic solvents (DESs) have attracted increasing attention as green solvents for azeotropic separation due to their low vapor pressure, nontoxicity, and low cost. In this study, three choline-based DESs were used to separate methanol-n-hexane azeotrope, and their extraction efficiencies were compared. The extraction mechanism of methanol by DESs was studied using molecular dynamics (MD) method, and the experimental and simulation results were in good agreement. Among the three DESs, ChCl/EG(1:2) showed the highest extraction efficiency for methanol. The role of Cl- in the liquid-liquid equilibrium (LLE) was found to be crucial, primarily provided by the electrostatic force.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Zihao Su, Xingyi Liu, Jiafu Xing, Yuyang Jiao, Zhaoyou Zhu, Jianguang Qi, Yinglong Wang
Summary: This study synthesized a deep eutectic solvent (DES) to separate ester-water mixtures and meet industrial discharge standards. Experimental results showed that the DES had a high distribution coefficient and selectivity for esters, enabling effective separation of esters from water. Molecular dynamics simulations revealed that menthol played a crucial role in the extraction process, with hydrogen bonding between menthol and ester as the main driving force. In conclusion, the DES demonstrated excellent extraction ability for esters, providing solid theoretical support for ester separations in various fields.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Wei Zhang, Xiaoyan Yi, Qian Yi, Lanyi Sun
Summary: This study investigates the feasibility and mechanism of separating n-hexane + DCE using Low Transition Temperature Mixtures (LTTMs) as solvents, combining experiments and simulations.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Ning Wang, Montana N. N. Carlozo, Eliseo Marin-Rimoldi, Bridgette J. J. Befort, Alexander W. W. Dowling, Edward J. J. Maginn
Summary: In this study, a machine learning-based workflow was used to optimize the force field parameters of HFCs, improving the prediction capability of their thermophysical properties. The recommended parameter sets showed excellent agreement with experimental data and outperformed previous force fields in the literature.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Chemistry, Physical
Carlos F. P. Miranda, Ana I. M. C. Lobo Ferreira, Luis M. N. B. F. Santos
Summary: This study investigates the effect of C2 methylation on the cohesive interaction of trifluoromethanesulfonate ionic liquids (ILs). The nature of the anion strongly influences the impact of C2 methylation. Strong-coordinating and smaller anions promote hydrogen bonding with the acidic hydrogen at the C2 position, while weak-coordinating and larger anions result in a dominant decrease in liquid entropy due to C2 methylation.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Environmental Sciences
Zihao Su, Yanli Zhang, Dingchao Fan, Peizhe Cui, Zhaoyou Zhu, Yinglong Wang
Summary: This study synthesized deep eutectic solvents (DESs) using menthol as hydrogen bond acceptor (HBA) and different carbon chain carboxylic acids as hydrogen bond donors (HBD). The liquid equilibrium (LLE) experiment was conducted to determine the distribution coefficient (beta) and selectivity (S) at standard atmospheric pressure and temperature. The impact of DESs on separation efficiency was discussed by changing the proportion. The NRTL model was used to correlate the experimental data, and molecular dynamics (MD) simulation was used to investigate the extraction process.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Joyce T. Lopes, Luis F. M. Franco
Summary: Modeling molecules as single anisotropic particles leads to better results compared to using molecules as chains of spherical segments in equation of state. Adjusting parameters results in physically sound geometrical models, such as inferring the oblate geometry of aromatic rings from vapor-liquid equilibrium data. In addition, the adjusted aspect ratios of ellipsoidal and spherocylindrical particles can be correlated with the acentric factor of their respective molecules, showing that the degree of nonsphericity of molecules can be captured by the acentric factor.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Wanpeng Yang, Donghai Xu, Yunfei Diao, Jun Zhao, Zefeng Jing, Yang Guo
Summary: The study revealed that temperature and density play significant roles in the nucleation process of K2SO4 in supercritical water, with high temperature aiding ion diffusion and weakening the electrostatic shielding effect of water molecules, facilitating interactions between ions to form larger clusters.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Shisheng Liang, Huiyuan Li, Yanli Zhang, Dingchao Fan, Yangyang Liu, Xianlong Wang, Zhaoyou Zhu, Yinglong Wang, Jianguang Qi
Summary: The application of ionic liquids (ILs) in extracting and separating n-butanol from octane was investigated. Surface charge density distributions, activity coefficients, distribution coefficients, and separation coefficients were calculated to understand the extraction mechanism of ILs. Molecular-scale analysis of intermolecular interactions provided insights into the separation mechanism of ILs.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Thermodynamics
Shiquan Shen, Kai Sun, Zhizhao Che, Tianyou Wang, Ming Jia
APPLIED THERMAL ENGINEERING
(2020)
Article
Energy & Fuels
Bo Niu, Ming Jia, Yachao Chang, Xue Dong, Pengzhi Wang
Summary: A quantitative assessment method of reduced chemical mechanisms based on the similarity evaluation was proposed in this study. Two reduced mechanisms were investigated and it was found that one model had a high degree of similarity to the detailed mechanism. A new reduced mechanism was constructed to accurately predict fuel ignition, oxidation, and flame propagation behaviors.
Article
Thermodynamics
Huiquan Duan, Ming Jia, Jinpeng Bai, Yaopeng Li
Summary: R-RCCI utilizes high-reactivity PODEn and low-reactivity P20G80 to increase combustion efficiency and reduce NOx emissions. By adjusting the start of injection timing, the injected fuel amount is increased, leading to improved combustion efficiency and ITE, while also effectively reducing NOx emissions.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2022)
Article
Energy & Fuels
Shuang Hao, Xu Han, Hong Liu, Ming Jia
Summary: The cetane number of biodiesel fuels was predicted using an artificial neural network, with two input sets based on fatty acid methyl ester (FAME) composition and functional groups of FAMEs. The composition-based method showed lower mean absolute errors and relative errors than the functional group-based method in testing. Analysis revealed that C18:01, C18:02, C18:00, n(-CH2-)/n(C), and n(C.C)/n(C) had the largest sensitivity coefficients.
Article
Thermodynamics
Ming Jia, Jinpeng Bai, Huiquan Duan, Yaopeng Li, Yikang Cai, Yachao Chang
Summary: Hydrogen/diesel RCCI outperforms gasoline/diesel RCCI in reducing exergy destruction due to higher combustion temperature, shorter combustion duration, and distinctive oxidation pathways. A higher premixed energy ratio can elevate exergy output work and reduce exergy destruction, while a higher initial pressure increases exergy destruction but also boosts exergy output work by reducing exergy transfer through heat transfer.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2022)
Article
Mechanics
Junqian Cai, Kai Sun, Yizhuo Feng, Ming Jia, Zhen Lu, Lei Shi, Tianyou Wang
Summary: Turbulent jet ignition (TJI) is a promising technology for engines to operate under lean conditions, and the study focused on ignition patterns and critical conditions. The research used high-fidelity large eddy simulation and identified two successful ignition patterns, establishing an ignition regime.
Article
Thermodynamics
Yachao Chang, Ming Jia, Shuai Huang, Hongda Zhang, Liming Cai
Summary: In this study, a skeletal mechanism for linear alcohols from C4 to C10 was constructed using reaction rate rules and decoupling methodology. The influence of different alcohol structures was considered through isomer lumping and reaction rate adjustment. The performance of the skeletal mechanism was validated by comparing with experimental data, showing reasonable agreement but some discrepancies in species concentrations.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Shuai Huang, Yachao Chang, Xue Dong, Ming Jia, Tao Li
Summary: A set of simplified models for mono-alkylated cyclohexanes was built and integrated into multi-dimensional combustion simulations. The models were validated under various experimental conditions, demonstrating the practicality of the proposed method.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Thermodynamics
Yikang Cai, Ming Jia, Yaopeng Li, Jingjie Cao, Antonio Garcia, Javier Monsalve-Serrano
Summary: This study focuses on identifying the optimal combustion schemes of the dual direct injection (DI2) engine system at different load conditions using n-butanol and diesel as test fuels. Through three-dimensional engine simulation combined with an improved genetic algorithm, the study reveals the optimal fuel stratification and auto-ignition characteristics. The results show that the optimal DI2 strategy varies with load conditions, and factors such as fuel reactivity and temperature play different roles in ignition.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Mechanics
Shaoyi Suo, Ming Jia, Linsong Jiang, Hong Liu
Summary: In this study, Beer's law was improved to evaluate the accuracy of droplet collision models by eliminating the shadow effect among the light-absorbing parcels. A theoretical evaluation method of the computational efficiency of droplet collision models was proposed based on the improved Beer's law. The performance and efficiency of different collision models were comprehensively evaluated, and the HST model showed relatively better performance in most cases.
Article
Mechanics
Jingjie Cao, Ming Jia, Yikang Cai, Yaopeng Li, Hong Liu
Summary: The traditional method of constructing the thermal wall function was reexamined and improved by correcting the integration scheme in the boundary layer. An enhanced heat transfer model was introduced. A new law of the wall, including the impacts of pressure work and heat release from chemical reactions, was obtained based on the analogy between momentum transfer and heat transfer predicted using the improved thermal wall function. The current research is beneficial for predicting the near-wall flow and heat transfer characteristics under conditions with strong interactions between the wall and the flame.
Article
Thermodynamics
Pengwei Zhang, Huiquan Duan, Guangfu Xu, Yaopeng Li, Ming Jia
Summary: Focusing on gasoline compression ignition (GCI) combustion, this study optimized operating parameters, fuel composition, and piston bowl geometry to improve engine performance under high loads by using a meliorative genetic algorithm and 3D computational fluid dynamics (CFD) program. The optimal GCI combustion strategy involves utilizing an open-type piston bowl, high-reactivity fuel, and late start of injection (SOI) to achieve multiple-stage combustion, reducing heat release rate and advancing combustion phase. The width of the piston bowl is the most significant geometric parameter impacting GCI combustion, affecting turbulent kinetic energy, surface area, heat transfer losses, and hydrocarbon emissions. Alternative strategies with re-entrant type piston bowl, low-reactivity fuel, and late SOI can reduce pressure rise rate and ringing intensity (RI), but at the expense of thermal efficiency.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Article
Engineering, Chemical
Haoxing Li, Jianhong Lei, Ming Jia, Hongpeng Xu, Shaohua Wu
Summary: This paper proposes a new biomass gasification technology combining solar thermal and supercritical water gasification, and solves the intermittent operation issue with a molten salt energy storage system. The high dimensional model representation (HDMR) approach is used to predict the gas production and lower heating value, and validated with experimental data. Multi-objective optimization results for five different types of biomass are discussed.
Article
Energy & Fuels
Huiquan Duan, Ming Jia, Zhen Xu, Yaopeng Li, Guangqing Xia
Summary: A comprehensive analysis was conducted on the combustion behaviors of H2/diesel RCCI, revealing the interplay between H2 and DI high-reactivity fuel and exploring the potential of H2/diesel RCCI in enhancing engine performance.