Article
Engineering, Chemical
S. R. Kuzenov, V. N. Alimov, A. O. Busnyuk, E. U. Peredistov, A. I. Livshits
Summary: Vanadium alloy membranes with added Fe are a promising alternative to palladium alloy membranes for producing ultrapure hydrogen. The hydrogen permeation through the studied alloys was significantly higher than through a similar Pd membrane. The hydrogen diffusivity in the alloy decreased with increasing alloying degree kappa and was generally lower than in pure V.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Xiao Liang, Feifei Huang, Songsong Xu, Jingjie Guo, Dongmei Liu, Xinzhong Li
Summary: Our newly developed V90Cr5Al5 hydrogen permeable alloy has been alloyed with Cu to enhance malleability. The resulting (V90Cr5Al5)90Cu10 consists of bcc-(V) and fcc-(Cu) phases and can be cold rolled into a thin membrane. After rolling and annealing, (V90Cr5Al5)90Cu10 exhibits finer grains and a higher percentage of special grain boundaries compared to the as-cast case. The rolled/annealed (V90Cr5Al5)90Cu10 shows a lower hydrogen diffusivity but significantly improved hydrogen permeation flux.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hong Zhang, Yichang Guo, Christophe Chipot, Wensheng Cai, Xueguang Shao
Summary: By simulating the ion transport process in a membrane-spanning [2]rotaxane mechanism, we studied and elucidated the detailed mechanism, validating the reliability of our method and proposing a new pH-controlled nano-object that can assist in unidirectional ion transport across membranes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Chemical
Jian Song, Zhigang Wang, Xiaoyao Tan, Yifan Cui, Sibudjing Kawi, Shaomin Liu
Summary: A BCFS perovskite hollow fiber membrane was prepared by phase inversion and sintering technique with the addition of Co2O3 to enhance mechanical strength and reduce sintering temperature. The membrane exhibits simultaneous permeation of hydrogen and oxygen, showing potential as a catalytic membrane reactor for various reactions. Simultaneous permeation enhances hydrogen and oxygen fluxes by reducing gas concentrations and promoting gas/ion exchange reactions.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Mostafa El-Shafie, Shinji Kambara, Yukio Hayakawa
Summary: This study numerically investigates the hydrogen diffusion through palladium and palladium-copper membranes and predicts their performance in hydrogen separation using a two-dimensional computational fluid dynamics model. The simulations show that the feed-gap distance, hydrogen concentration, and reactor heating temperature have significant impacts on the hydrogen permeation processes. The diffusion flux of the Pd-Cu40% membrane is relatively larger than that of the pure Pd membrane, and the convective flux, diffusion mass transfer flux, and concentration distribution of the Pd-Cu40% membrane increase up to 350 degrees C and then decrease at higher temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Biochemistry & Molecular Biology
Abdulrahman Alraeesi, Tracy Gardner
Summary: Palladium and palladium alloy membranes are commonly used for hydrogen purification, removal, or reaction processes, with Sieverts' Law being applied to analyze hydrogen permeation through the membranes. However, under certain conditions, such as low feed concentrations, concentration polarization may dominate hydrogen transport, leading to deviation from Sieverts' Law. Adsorption effects at high pressure and low temperature can result in pressure exponent values less than 0.5.
Article
Engineering, Chemical
M. Salome Macedo, N. Acha Uriarte, M. A. Soria, Luis M. Madeira, J. A. Calles, R. Sanz, D. Alique
Summary: This study investigates the use of different sizes of CeO2 particles to generate an intermediate layer and facilitate the deposition of a thin Pd-film on H-2 selective membranes. Membrane M demonstrates the best performance in terms of H-2 permeance, and the stability of the membranes is high regardless of the particle size.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Polymer Science
Manu L. Naik, Ashok M. Sajjan, T. M. Yunus Khan, M. Ashwini, Sharanappa Achappa, Nagaraj R. Banapurmath, Narasimha H. Ayachit, Mostafa A. H. Abdelmohimen
Summary: Chitosan-capped silver nanoparticle (CS-capped AgNPs)-incorporated Poly(vinyl alcohol) (PVA) hybrid membranes were prepared for ethanol dehydration via pervaporation. The addition of CS-capped AgNPs improved the hydrophilicity and swelling degree of the hybrid membranes, leading to better performance in ethanol dehydration. The thermal stability and pervaporation experiment results confirmed the efficient separation of water from the azeotropic ethanol using the hybrid membranes.
Article
Biochemistry & Molecular Biology
Seungbo Ryu, Arash Badakhsh, Je Gyu Oh, Hyung Chul Ham, Hyuntae Sohn, Sung Pil Yoon, Sun Hee Choi
Summary: In order to overcome the high cost and hydrogen embrittlement of palladium membranes, researchers have deposited copper and palladium on tantalum to fabricate a composite hydrogen permeable membrane with improved durability. Despite having lower hydrogen permeation, the palladium-copper/tantalum composite achieved twice the temporal stability. The degradation process of the tantalum-supported hydrogen permeable membrane was examined using SEM. In addition, the thermocatalytic hydrogen dissociation mechanisms on palladium and palladium-copper were investigated and discussed numerically using density functional theory.
Article
Engineering, Chemical
Tingyu Sun, Zhi Zhu
Summary: Based on a graphene oxide membrane model and molecular dynamic simulations, this study proposes that light at a specific frequency can dramatically enhance the permeability of the membrane, with a maximum enhancement of 141-fold. The underlying mechanism involves the transfer of photon energy absorbed by functional groups to the kinetic energy of confined water, breaking the hydrogen bond network and enhancing water diffusion. These findings provide a possible route for controllable particle transport in biological processes and chemical reactions.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Mallikarjunagouda Patil, Shridhar N. Mathad, Arun Y. Patil, Muhammad Nadeem Arshad, Hajar Saeed Alorfi, Madhu Puttegowda, Abdullah M. Asiri, Anish Khan, Naved Azum
Summary: This study presents the synthesis of modified PVA-g-St-g-PMA copolymers and the fabrication of PVA-g-AC composite membranes using microwave irradiation technique and potassium persulfate initiator. The modified composite membranes showed excellent permeability and selectivity, as well as the advantages of easy handling and reusability.
Article
Engineering, Chemical
Niels van Linden, Yundan Wang, Ernst Sudholter, Henri Spanjers, Jules B. van Lier
Summary: The study assessed the selectivity of NH3 over H2O transfer for different types of membranes, finding that the PV membranes did not show selectivity in NH3 transfer. Compared to porous PTFE membranes, dense silica-based PV membranes did not allow for the recovery of gaseous NH3 with lower H2O content in the recovered gas.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Jose M. Luque-Alled, Cesar Moreno, Patricia Gorgojo
Summary: The next generation of gas separation membranes requires novel membrane materials with superior performance, mechanical stability, and long-term stability. While two-dimensional (2D) materials offer advantages over conventional polymeric materials, their commercialization has not been achieved due to scalability and high manufacturing costs. This review focuses on the current state and prospects of the technology, highlighting novel 2D materials and strategies for fabricating ultrathin membranes. A multidisciplinary approach is necessary to prepare robust, large-scale, and economically affordable (2D material)-based membranes capable of entering the gas separation market.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yujing Tong, Hongjun Liu, Sheng Dai, De-en Jiang
Summary: Researchers have discovered a new type of monolayer covalent fullerene network that shows promising potential as a high-permeance, selective hydrogen separation membrane. These membranes have the best pore size match, a unique funnel-shaped pore, and entropic selectivity, making them ideal for separating H-2 from larger gases such as CO2 and O-2. With excellent hydrogen permeance and high selectivity, these ultrathin membranes surpass the 2008 Robeson upper bounds by a large margin.
Article
Thermodynamics
Yehui Cui, Zhilang Zhang, Xiangguo Zeng, Huaqin Kou
Summary: Numerical modelling and study of metal hydride bed with heat and mass transfer is important for understanding the behavior of the storage device. A novel peridynamic model considering hydrogen absorption was proposed to predict the performance of the hydrogen charging process. The model was applied to simulate metal hydride reaction and the results matched well with numerical and experimental data.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Environmental
Rajan Arjan Kalyan Hirani, Hong Wu, Abdul Hannan Asif, Nasir Rafique, Lei Shi, Shu Zhang, Zhentao Wu, Lai -Chang Zhang, Shaobin Wang, Yu Yin, Martin Saunders, Hongqi Sun
Summary: Membrane separation and sulfate radicals-based advanced oxidation processes (SR-AOPs) can be combined to efficiently remove organic pollutants. Immobilizing metal oxide catalysts on ceramic membranes can enhance membrane separation technology by enabling catalytic oxidation without the need for recovering suspended catalysts. Co3O4 ceramic catalytic membranes with different Co loadings were successfully fabricated and demonstrated uniform distribution of Co3O4 nanoparticles for catalytic oxidation of 4-hydroxybenzoic acid (HBA). Mechanistic studies identified both SO4 center dot- and (OH)-O-center dot as reactive radicals, with SO(4)(center dot-) playing the dominant role in the catalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Hao Peng, Vatsal Shah, Kang Li
Summary: Phase inversion plays a vital role in membrane technology for economic production of polymeric membrane and energy-saving wastewater treatment. However, existing phase inversion membranes often have low permeance, limiting their efficiency in separation processes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Kornkamol Banjerdteerakul, Farhad Moghadam, Hao Peng, Kang Li
Summary: For the first time, a new approach was proposed to prepare porous hollow fiber (HF) yttria-stabilized zirconia (YSZ) substrates with small-diameter (660-790 μm, outer diameter (OD)) by stretching the nascent HF using gravitational force. Using a delayed phase inversion, a plurality of radial micro-channels opening from the interior surface of HFs can be realized. The resultant HF substrates show promising permeation characteristics and good fracture strength, and small-diameter HF substrates with higher surface curvature ensured the fabrication of porous GO (PGO) membranes with better dye separation performance.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Kornkamol Banjerdteerakul, Hao Peng, Kang Li
Summary: Nanofiltration is an effective method for removing emerging pharmaceuticals from waste-water to improve water quality and mitigate environmental impacts. However, the low separation efficiency of current nanofiltration membranes has hindered their development. In this study, a thin film composite membrane was prepared by stacking covalent organic framework (COF) nanosheets on a ceramic hollow fibre, showing high rejection for environmentally persistent pharmaceuticals. The COF-based nanofiltration membranes have a small footprint and can be easily integrated into existing water treatment systems, making them a promising option for mitigating the environmental impacts of emerging pharmaceuticals in wastewater.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Hengyang Mao, Peng Xu, Shouyong Zhou, Zhaoru Fan, Ailian Xue, Meisheng Li, Yijiang Zhao, Aiqin Wang, Zhentao Wu, Yiqun Fan
Summary: A facile approach is reported to produce nanofiber membranes with oriented channels, narrow pore size, and low tortuosity. Compared with unordered membranes, ordered membranes have reduced average pore size and increased water permeance. Moreover, the stationary flux of ordered membranes and the retention of oil-in-water emulsion have also increased.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Di Wang, Heyao Wu, Yanyang Xu, Tianjia Chen, Yongfeng Zhang, Zhifei Hu, Zhigang Wang, Xiaoyao Tan, Shaomin Liu
Summary: In this study, nickel hollow fiber membranes were successfully fabricated and used as membrane reactors for toluene steam reforming and H2 separation. The results showed that the membrane reactor achieved stable and efficient performance in toluene conversion and H2 production under suitable conditions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Hongyong Zhao, Ting Song, Xiaoli Ding, Ruyi Cai, Xiaoyao Tan, Yuzhong Zhang
Summary: Membrane technology is widely used for O2/N2 separation in industries, and cobalt-based compounds are known for their affinity for O2, which improves O2/N2 selectivity. A study successfully developed PIM-1 mixed matrix membranes containing cobalt-based ionic liquid, resulting in higher O2/N2 selectivity and lower O2 permeability. The application of a magnetic field further enhanced the O2/N2 selectivity of the membranes. These findings highlight the potential of these membranes for air separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Kornkamol Banjerdteerakul, Hao Peng, Kang Li
Summary: By employing an in-situ growth method, we successfully prepared COF-LZU1 and COF-300 membranes for the separation of polar/non-polar solvent mixtures. These composite membranes, consisting of a defect-free COF layer on a ceramic hollow fiber substrate, exhibited high solvent fluxes and achieved high separation factors for various azeotropic mixtures. Our study demonstrated the technical feasibility of using COF-based membranes for the separation of azeotropic solvent mixtures.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Hao Peng, Kang Li
Summary: In this study, a novel approach combining non-solvent-induced phase separation (NIPS) with crystallisation and diffusion (CCD) technique, called NIPS-CCD, was proposed to enhance the permeation of polyethersulfone (PES) ultrafiltration membrane. The NIPS-CCD method showed a 50-fold increase in water permeation to 771 LMH bar-1 with pore size of 6-7 nm. This approach can be easily adapted for other high-performance membrane materials, making it a promising strategy for improving membrane permeation properties.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Kornkamol Banjerdteerakul, Hao Peng, Kang Li
Summary: Covalent organic frameworks (COFs) have shown potential as membrane materials for water purification and organic solvent nanofiltration due to their adjustable pore size and ease of functionalisation. However, current COF membranes are limited in their mechanical stability and structural integrity when applied on flexible polymeric substrates. In this study, COF-LZU1 membranes were fabricated on pre-designed ceramic hollow fibres using direct interfacial polymerisation, resulting in highly crystalline and defect-free COF layers. The membranes exhibited high pure water permeance and rejection rates for dyes, highlighting their potential for enhanced process intensification.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Gonghe Tong, Yanbin Li, Zhigang Wang, Xiaoyao Tan
Summary: Micro-tubular protonic ceramic fuel cells (MT-PCFCs) have advantages in terms of intermediate operating temperature, large volumetric power density, and low sealing requirements. This study successfully fabricates high-performance MT-PCFCs using a one-step fabrication method, achieving a peak power density of 601.2 mW cm-2 for a single cell and a power output of 2.5 W for a cell stack.
JOURNAL OF POWER SOURCES
(2023)
Review
Biochemistry & Molecular Biology
Zhicheng Zhang, Wanglin Zhou, Tianlei Wang, Zhenbin Gu, Yongfan Zhu, Zhengkun Liu, Zhentao Wu, Guangru Zhang, Wanqin Jin
Summary: Ion-conducting ceramic membranes have the potential to achieve absolute selectivity for specific gases at high temperatures, making them promising for chemical production. By combining reaction and separation processes into one unit, membrane reactors can reduce by-product formation and utilize thermal effects for efficient and sustainable production. This paper provides an overview of recent developments, principles, advantages, disadvantages, and challenges in dense ceramic catalytic membrane reactors.
Article
Chemistry, Physical
Jie Wang, Baolei Shao, Claudia Li, Jian Song, Bo Meng, Xiuxia Meng, Naitao Yang, Sibudjing Kawi, Jaka Sunarso, Xiaoyao Tan, Shaomin Liu
Summary: In this study, a ceramic hydrogen permeable membrane reactor was developed for the simultaneous reaction and separation process, allowing the production of synthesis gas and pure hydrogen while reducing greenhouse gas emissions.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Review
Green & Sustainable Science & Technology
Mahesan Naidu Subramaniam, Zhentao Wu, Pei Sean Goh, Shouyong Zhou
Summary: This review article focuses on the development of composite biochar-based photocatalysts (BBP) for wastewater treatment using agricultural and poultry waste-derived biochar (BC). The synthesis techniques and properties of BC and BBP are discussed in detail. The review also explores the role of BC in enhancing the performance of BBP and its synergistic effects on the degradation of different types of pollutants. Additionally, the challenges associated with the practical application of BBP are elaborated.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Analytical
Xihui Bian, Zizhen Zhao, Jianwen Liu, Peng Liu, Huibing Shi, Xiaoyao Tan
Summary: A novel method combining the discretized butterfly optimization algorithm-partial least squares (BOA-PLS) and near-infrared (NIR) spectroscopy is proposed for the rapid determination of blood cholesterol concentration. The results show that the improved V-shaped (I-V) function is the best transfer function for discretization. Preprocessing and variable selection methods based on BOA can improve the prediction performance of PLS. The MSC-MMS can further enhance the predictive accuracy of I-V-BOA-PLS.
ANALYTICAL METHODS
(2023)
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)
