Article
Materials Science, Multidisciplinary
Yijun Zhang, Ludovic Josien, Cyril Vaulot, Angelique Simon-Masseron, Jacques Lalevee
Summary: The increasing concentration of CO2 in the atmosphere has a severe impact on the environment and human health, leading to global warming. Zeolites, due to their high CO2 adsorption capacity, are important for CO2 capture and sequestration. This study successfully prepared binder-free zeolite beads with good mechanical strength and preserved porosity, achieving a high specific surface area and CO2 adsorption capacity.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Environmental
Mohsen Karimi, Alirio E. Rodrigues, Jose A. C. Silva
Summary: A volumetric apparatus was developed for studying adsorption equilibria and kinetics, validated by experiments on CO2, CH4, and N-2 adsorption. The data collected showed good agreement with published values and was modeled using the Sips model. The sorption kinetics of CO2 was measured and analyzed using a solid-film linear-driving-force model, showing an increase in mass transfer coefficients with pressure and temperature.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agronomy
Yacu Vicente Alca-Ramos, Noemi-Raquel Checca-Huaman, Enrique Arevalo-Gardini, Cesar O. Arevalo-Hernandez, Juan A. Ramos-Guivar
Summary: In this study, an efficient method was developed to directly overcome the contamination of soils and Theobroma cacao L. seedlings by nickel. Commercial zeolite 5A was used as an adsorbent, and three high-yielding cacao genotypes in South America were studied. The results showed that zeolite 5A had a high adsorption efficiency of 95% and was not chemically harmful to the plant morphology. This material has remarkable soil remediation application and potential.
Article
Chemistry, Applied
Kyounghee Chung, Dooyong Park, Kyung-Min Kim, Chang-Ha Lee
Summary: This study establishes the design basis for the cyclic adsorption process of ethylene purification by measuring the adsorption equilibria and kinetics of ethane and ethylene on zeolite 13X pellets. The strong cation-pi interaction between ethylene and Na+ in zeolite 13X leads to higher adsorption capacity and affinity for ethylene. Additionally, macropore diffusional resistance also contributes to the adsorption kinetics.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Environmental
Shuangchun Lu, Rui Han, Hao Wang, Chunfeng Song, Na Ji, Xuebin Lu, Degang Ma, Qingling Liu
Summary: This study reports on the synthesis of binder-free monolithic zeolite pellets with robust mechanical strength and high water tolerance using a citric acid sacrifice strategy. The pellets have a large specific surface area and mesopore volume, and exhibit excellent adsorption capacity for VOCs even under humid conditions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Prabhu Azhagapillai, Maryam Khaleel, Fouad Zoghieb, Gisha Luckachan, Liyamol Jacob, Donald Reinalda
Summary: The water vapor adsorption capacity of zeolite molecular sieves gradually decreases when exposed to methanol and heptane vapors, with methanol having a more severe impact on the adsorption capacity than heptane.
Article
Thermodynamics
H. Wang, Z. G. Qu, Y. Yin, J. Q. Bai, C. He
Summary: A predictive model for effective thermal conductivity of an adsorption bed was developed, considering the impact of the adsorbed phase on gas phase thermal conductivity. The study revealed three distinct regions in the thermal conductivities of the zeolite adsorbent particles and bed, with identified inflection point temperatures. The model showed that gas adsorption effects can be ignored above certain inflection point temperatures, and ignoring the coupled effect of adsorption phase and gas phase can lead to overestimation of the ETC.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Engineering, Chemical
Young -Ho Cho, Masoud Mofarahi, Kyung-Min Kim, Chang-Ha Lee
Summary: Desulfurization of ultra-low sulfur species in natural gas is important for chemical and clean energy applications. This study investigated the adsorption behavior of trace-level sulfur compounds on zeolite pellets and found that physical adsorption was dominant for the removal of tetrahydrothiophene.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Tom R. C. Van Assche, Gille R. Wittevrongel, Valentina Lozano Betancur, Lala Muslumzada, Joeri F. M. Denayer
Summary: This paper proposes a graphical method to obtain adsorbed amounts from breakthrough curves, which can be used in isothermal, diluted adsorption breakthrough experiments. By using an integrated capacity curve, additional equilibrium points can be extracted beyond the final state without the need for a multicomponent model.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Akira Oda, Suguru Hiraki, Eiji Harada, Ikuka Kobayashi, Takahiro Ohkubo, Yuka Ikemoto, Taro Moriwaki, Yasushige Kuroda
Summary: Efficient adsorption of CO2 by NaCaA-85 material at room temperature and lower pressure region has been observed, with specific and selective adsorption mechanism verified through experimental and computational approaches. The material demonstrated superior separation properties for CO2 from other gases, indicating a promising potential for mitigating CO2 emissions through selective adsorption.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Engineering, Chemical
Jose Antonio Delgado Dobladez, Vicente Ismael Agueda Mate, Silvia Alvarez Torrellas, Marcos Larriba, Gonzalo Pascual Munoz, Raul Alberola Sanchez
Summary: The performance of 3A, 4A, and 5A zeolites in a PSA reactor for methanol production via CO2 hydrogenation was compared through numerical simulation. It was found that 3A zeolite exhibited the best performance, leading to high conversion rates and selectivity with minimal loss of hydrogen. The proposed process allows for methanol production at 250°C and 50 bar with a conversion rate of 99.6% and selectivity of 83-96%.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Nam Sun Kim, Muhammad Numan, Sung Chan Nam, Sang-Eon Park, Changbum Jo
Summary: The breakthrough time of MFI zeolite could be significantly improved by reducing the crystal thickness to a single-unit-cell dimension, resulting in easy access of p-xylene to micropores. Open mesopores did not slow down the mass transfer of p-xylene into zeolite adsorbents, while constricted mesopores did. Mesopore opening is crucial for the desorption behavior of p-xylene, with facilitated diffusion through mesoporous channels allowing for desorption at lower temperatures.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Nebojsa Korica, Pedro S. F. Mendes, Jeriffa De Clercq, Joris W. Thybaut
Summary: The study found that the presence of methylcyclohexane affects the hydroconversion of n-octane over Pt/HUSY catalysts, but does not impact the behavior of methylcyclohexane itself. This is mainly due to the preferred adsorption of cycloalkanes on metal sites, leading to a shift from ideal to nonideal hydrocracking.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Liyun Yang, Mengdan Gao, Tianci Wei, Tetsuya Nagasaka
Summary: NZVI loaded on zeolite 5A can efficiently remove As(V) in water, with the removal capacity almost unaffected by solution pH in the pH range of 4-12. However, the As(V) removal efficiency decreases with high concentrations of PO43- present in the solution. After 5 cycles, the NZVI-5A zeolite achieved an As(V) removal efficiency of 84.0% and could be separated from the solution using an external magnetic field.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Angie F. Mayta-Armas, Yamerson Canchanya-Huaman, Jemina Pomalaya-Velasco, Yessica Bendezu-Roca, Noemi-Raquel Checca-Huaman, Juan A. Ramos-Guivar
Summary: Zeolite 5A was synthesized from kaolin via the hydrothermal method and used for the removal of As(V) and Pb(II) from drinking water and irrigation surface water. The adsorption mechanisms of As and Pb were investigated through various experiments, including adsorption kinetics, optimum pH, adsorbent dose, and adsorption isotherms. The results showed that Zeolite 5A achieved a removal adsorption rate higher than 95% for both As(V) and Pb(II) within 9 and 12 hours, respectively. The maximum adsorption capacities for As and Pb were estimated to be 36.35 mg g(-1) and 46.67 mg g(-1) respectively. Zeolite 5A proved to be a cost-effective adsorbent, capable of reducing the concentration of As and Pb in drinking and irrigation water below the permissible limit set by the WHO.
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)