Article
Environmental Sciences
Muhammad Tawalbeh, Mukhtar Al-Ismaily, Boguslaw Kruczek, F. Handan Tezel
Summary: This study investigates the transport characteristics of binary mixtures of CO2 and N-2 through thin silicalite-1 membranes using a model based on Maxwell-Stefan equations and Extended Langmuir isotherm. The results show that exchange diffusivities have less dependence on operating conditions compared to permselectivity and permeance, making them more suitable for describing the intrinsic transport characteristics of silicalite-1 membranes.
Article
Engineering, Chemical
Dylan J. Weber, Ronita Mathias, Ryan P. Lively, Joseph K. Scott
Summary: Improved numerical methods are proposed for predicting the permeability of complex hydrocarbon mixtures. The shooting algorithm is found to be the most accurate and efficient method.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Zhongwei Wei, Shaoqing Zhang, Li Chang, Hongliang Liu, Lei Jiang
Summary: In this study, a superwetting membrane system was developed to enrich ethanol from water in a high-flux manner. By regulating the surface energy of the porous solid membrane and the hydration interaction, ethanol can rapidly wet and permeate the porous membrane.
FRONTIERS IN CHEMISTRY
(2022)
Article
Engineering, Chemical
Jin-hyeok Park, Donghun Kim
Summary: Zeolite nanosheets are effective in fabricating high-performance separation membranes, but their direct synthesis is complicated, especially for achieving the desired two-dimensional morphology. However, a simple synthesis method was found for MFI structure-type nanosheets using a single hydrothermal treatment, which had favorable thickness and aspect ratio for membrane fabrication compared to other zeolite MFI materials. The zeolite MFI membranes made from these nanosheets exhibited high flux and separation factor at high temperatures, outperforming membranes made from conventional zeolite MFI materials.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Chunyu Li, Yuanhui Tang, Hanhan Lin, Chunhui Zhang, Ze Liu, Lixin Yu, Xiaolin Wang, Yakai Lin
Summary: A novel simulation methodology was developed to analyze the dynamics of hybrid induced phase separation (HIPS) at a multiscale level. The method combined dissipative particle dynamics (DPD), molecular dynamics (MD), and extended Maxwell-Stefan (MS) equations. The simulation results indicated that the mass transfer played a decisive role in the phase separation near the interface, resulting in an asymmetric structure with a denser polymer top layer and porous sublayer. The multiscale simulation provided deep insights into the membrane formation via the HIPS process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jinyuan Zhang, Peipei Sun, Zhao Mo, Xianglin Zhu, M. D. Shouquat Hossain, Guanyu Wu, Zhihuan Miao, Pengcheng Yan, Zhigang Chen, Hui Xu
Summary: In this work, Mn-Cd dual-metal photocatalyst was synthesized and the effects of different proportions of bimetals on hydrogen production activity were studied. The ingenious design of the bimetallic sites led to significant improvement in the photocatalytic hydrogen production performance of MCS0.19.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Yasuhisa Hasegawa, Mayumi Natsui, Chie Abe, Ayumi Ikeda, Sean-Thomas B. Lundin
Summary: In this study, the permeation and separation properties of CHA-type zeolite membranes were evaluated using molecular simulation technique. It was found that the CO2 and CH4 permeances were mainly influenced by the porosity of the support material, with the CO2 permeance reduced due to preferential adsorption with increasing pressure drop. Molecular simulation and the Maxwell-Stefan equation were shown to be a useful technique for estimating the permeation properties of zeolite membranes, although accurate prediction of adsorption terms remains a challenge.
Article
Mathematics, Applied
Zhi-You Chen, Chung-Yang Wang, Yu-Jen Huang
Summary: This paper considers the nonlinear equations arising from the self-dual Maxwell-Chern-Simons gauged O(3) sigma model on (2+1)-dimensional Minkowski space. The authors establish the asymptotic behavior of multivortex solutions and determine the range of the flux for non-topological solutions. Additionally, they prove the radial symmetry property under certain conditions in the case of a single vortex point.
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS
(2022)
Article
Chemistry, Physical
Stefano Brandani
Summary: This article discusses four general properties of adsorption azeotropy in porous materials, including the existence of a lower bound on the pressure at which an azeotrope may be present and the influence of molecules of different sizes. The study focuses on the dual site Langmuir model and identifies six categories of adsorption azeotropes.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2023)
Article
Materials Science, Characterization & Testing
Vahid Vatanpour, Yaghoub Mansourpanah, Seyed Soroush Mousavi Khadem, Sirus Zinadini, Nadir Dizge, Mohammad Reza Ganjali, Somayeh Mirsadeghi, Morteza Rezapour, Mohammad Reza Saeb, Hassan Karimi-Male
Summary: A novel polyethersulfone (PES) nanocomposite membrane incorporated with lanthanum vanadate (LaVO3) nanosheets was successfully fabricated, showing improved properties such as surface roughness, hydrophilicity, water flux, and antifouling capabilities. The nanocomposite membrane also demonstrated high retention for Solazol Red SP 3B and Bovine serum albumin, indicating its multifunctional character for purification applications.
Article
Engineering, Electrical & Electronic
Ting Liu, Wen-wu Wang, Xiao-fei Zhang, Yi-na Guo
Summary: A new algorithm based on PDualGAN is proposed for separating multiple sources from mixtures collected by a single sensor, with new datasets created for experimental validation. Experimental results demonstrate that the proposed algorithm outperforms state-of-the-art algorithms across multiple evaluation metrics.
DIGITAL SIGNAL PROCESSING
(2022)
Article
Engineering, Chemical
Mingzhen Shi, Wenjie Xiong, Xiaomin Zhang, Jialan Ji, Xingbang Hu, Zhuoheng Tu, Youting Wu
Summary: This study proposes a new strategy for designing task-specific DESs for efficient H2S capture. The designed DESs demonstrate unprecedented absorption capacity and excellent recyclability. These task-specific DESs are expected to be excellent alternatives in the field of acid gas separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Guangxue Zhou, Langping Wang, Xiaofeng Wang, Yonghao Yu
Summary: This work investigated the influences of mirror-field and closed-field magnetic field configurations on plasma parameters and ion flux dynamics in dual magnetron reactive high power impulse magnetron sputtering with Al targets in Ar/O-2 mixture. The study found that the plasma compositions were similar in both configurations, but the closed-field discharge had higher electron density and lower plasma potential compared to the mirror-field discharge. The ion energy distribution functions showed different peak energies and ion fluxes between the two configurations, with the mirror-field discharge peaking at the end of the pulse and the closed-field configuration reaching peak fluxes 10 µs after pulse termination.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Energy & Fuels
Qi Chen, Yinsong Li
Summary: This study presents the experimental investigation of an zeotropic mixture separation condensation-based dual-temperature refrigeration cycle using R290/R600a as the refrigerant. The cyclic operation characteristics of the refrigeration system under on-off periodic operation mode are explored, and the influence of different factors such as refrigerant charge, refrigerant mass fraction, throttling valve opening, and ambient temperature are evaluated. The results show that the compressor average power and duty cycle are affected by the refrigerant charge, R600a-charged concentration, and freezer valve opening. The study also demonstrates that the minimum energy consumption is achieved at specific parameter values. Additionally, a higher ambient temperature affects the heat transfer, compressor duty cycle, and daily power consumption.
Article
Energy & Fuels
Sang Won Jung, Jun Young Yoon
Summary: This paper proposes a dual-leakage hybrid layer modeling (DL-HLM) method for linear permanent-magnet synchronous motors (LPMSMs) in heavily saturated states. The DL-HLM combines a nonlinear dual-leakage flux-tube model for the iron-cored armature, a Maxwell model for the PM track, and a hybrid input-output conversion method. The proposed method accurately captures nonlinearities and estimates motor forces with high accuracy and significantly faster computation time compared to the finite element method (FEM).
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2023)
Review
Engineering, Chemical
Rozaini Abdullah, Syamima Nasrin Mohamed Saleh, Kartina Embong, Ahmad Zuhairi Abdullah
CHEMICAL ENGINEERING COMMUNICATIONS
(2020)
Article
Environmental Sciences
Yin Yin Chan, Yean Ling Pang, Steven Lim, Chin Wei Lai, Ahmad Zuhairi Abdullah, Woon Chan Chong
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Environmental Sciences
Y. L. Tan, B. H. Hameed, A. Z. Abdullah
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Chemistry, Analytical
Yean L. Pang, Wen S. Teh, Steven Lim, Ahmad Z. Abdullah, Hwai C. Ong, Chien-Hou Wu
Summary: By studying different weight ratios of AC/TiO2 composites, it was found that they have high catalytic efficiency in degrading organic dyes and maintain high performance even after one cycle of use.
CURRENT ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Ahmad Zuhairi Abdullah, Muhammad Hazim Yaacob, Nor Irwin Basir
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2020)
Review
Energy & Fuels
Mohamed Hussein Abdurahman, Ahmad Zuhairi Abdullah
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2020)
Article
Environmental Sciences
Syamima Nasrin Mohamed Saleh, Ahmad Zuhairi Abdullah
Summary: The study focuses on the design of catalysts for converting glycerol to lactic acid and the impact of their performance on glycerol conversion rate and lactic acid yield. Catalysts with a Ce-to-Zr ratio of 1:2 showed the best performance on SBA-15, and the shape selectivity effect of the catalyst can suppress the formation of by-products.
WASTE AND BIOMASS VALORIZATION
(2021)
Review
Biotechnology & Applied Microbiology
Chi Cheng Chong, Aqsha Aqsha, Muhammad Ayoub, Muhammad Sajid, Ahmad Zuhairi Abdullah, Suzana Yusup, Bawadi Abdullah
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2020)
Article
Environmental Sciences
Hui Cheng Yap, Yean Ling Pang, Steven Lim, Chin Wei Lai, Ahmad Zuhairi Abdullah
ENVIRONMENTAL EARTH SCIENCES
(2020)
Review
Chemistry, Multidisciplinary
Muhammad Yusri Ahmad, Nor Irwin Basir, Ahmad Zuhairi Abdullah
Summary: Oxydehydration of glycerol to acrylic acid is a two-step reaction involving dehydration and oxidation, requiring careful catalyst selection and reaction condition control to achieve high yield. The review focuses on recent works and critical analysis of different catalysts, highlighting the importance of specific acid sites and redox strength of active components.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Review
Engineering, Chemical
Zulqarnain, Mohd Hizami Mohd Yusoff, Muhammad Ayoub, Norwahyu Jusoh, Ahmad Zuhairi Abdullah
Article
Engineering, Chemical
Ahmad Zuhairi Abdullah, Natasha Ghazali, Peng Yong Hoo, Nor Irwin Basir
Summary: In this study, zirconia was incorporated into mesoporous MCM-41 support for the selective esterification of glycerol with fatty acid. The catalysts showed correlations between their characteristics and activity under different reaction conditions, with the precipitation method demonstrating more internal incorporation of the acidic component.
CHEMICAL ENGINEERING COMMUNICATIONS
(2022)
Article
Environmental Sciences
Nurulhuda Amri, Suzylawati Ismail, Syahida Farhan Azha, Ahmad Zuhairi Abdullah
Summary: In this study, electrocoagulation (EC) was used to treat batik wastewater, with response surface methodology based on central composite design to analyze removal efficiency and interactions between process variables. It was found that pH was the most influential parameter causing interactions, and silica played a role in the removal mechanism.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Noraini Razali, Ahmad Zuhairi Abdullah
INDONESIAN JOURNAL OF CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Nurulhuda Amri, Ahmad Zuhairi Abdullah, Suzylawati Ismail
INDONESIAN JOURNAL OF CHEMISTRY
(2020)
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)
