Article
Engineering, Chemical
Catia Algieri, Enrico Drioli
Summary: Membrane-based technology is attracting attention due to its low energy consumption, mild operating conditions, and high efficiency. Polymeric membranes are widely used for their low cost and reproducible preparation, but face issues like fouling and trade-off between permeability and selectivity. Inorganic membranes like zeolite membranes, with their hydrophilic nature, high stability, permeability, and selectivity, offer solutions to these problems. Their molecular-level pore size and adsorption property make them suitable for a variety of separation processes, although challenges like reproducibility, defects, and high manufacturing costs still hinder their industrial-scale application.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Xiaoxue Tang, Ye Zhang, Danni Meng, Xue Kong, Senlin Yang, Wanying Guo, Heng'e Qiu, Lin Kong, Yanfeng Zhang, Zefang Zhang
Summary: In this study, sub-micron SSZ-13 membranes were successfully prepared using a hot-dipping method, demonstrating outstanding CO2-CH4 mixture separation performance. The method effectively prevented any undesirable changes to the seed layer, which may help in correlating membrane performance with seed layer properties.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Senlin Yang, Ye Zhang, Wanying Guo, Longfei Zhou, Mengya Chen, Jialin Ma, Yanfeng Zhang
Summary: In this study, low-cost synthesis of thin ZSM-5 membranes was achieved by using a self-terminating mother liquor with high Si/Al ratio and adjusting the ratio of mother liquor/membrane area to control the thickness. The obtained ultrathin MFI membranes showed excellent separation performance for butane isomers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Applied
Xiaoling Liu, Lei Chen, Hongzhong Xu, Shi Jiang, Yu Zhou, Jun Wang
Summary: This study successfully synthesized beta zeolite-encapsulated Pt nanoparticles (Pt@Beta) using an unusual acid hydrolysis preaging step, demonstrating high catalytic activity and stability in the transformation reaction. The research provides a new approach for the application of noble metal nanoparticles in catalysis.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Chemical
Peng Du, Jieyu Song, Xuerui Wang, Yuting Zhang, Jixian Xie, Gang Liu, Yongli Liu, Zhenwei Wang, Zhou Hong, Xuehong Gu
Summary: Efficient hydrogen separation is crucial from the cracked tail gas of ethylene plant. DD3R zeolite membranes were developed for this purpose, showing high selectivity and stability under harsh conditions. The efficient scale-up synthesis method led to the production of high-quality membranes suitable for industrial applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
A. Mokhtari, M. Khatamian
Summary: In this study, MFI-type cobaltosilicates were successfully synthesized using a novel pretreatment method, with optimal crystallization conditions determined through investigation of various parameters. Characterization techniques including XRD, FT-IR, and UV-vis confirmed the formation of pure crystalline ZSM-5 zeolites and the incorporation of Co2+ ions into the zeolites' framework. The synthesized Na[Co]ZSM-5 zeolites showed comparable specific surface areas to aluminosilicate ZSM-5 zeolites, and demonstrated CO2 adsorption capacities of approximately 2.19 and 5.33 mmol g(-1) at 298 K and 1 bar for samples prepared at pH = 9.5 and 10.5, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Tao Zhou, Mengyang Shi, Lingjie Chen, Chao Gong, Ping Zhang, Jixian Xie, Xuerui Wang, Xuehong Gu
Summary: In this study, all-silica STT zeolite membranes were prepared for capturing hydrogen from coke oven gas as a clean energy resource. The membranes exhibited high selectivity and stability, presenting a new possibility for hydrogen separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Ryuma Tanaka, Yuta Ito, Yasuhisa Hasegawa, Takeshi Higuchi
Summary: This study focused on the application of LTA zeolite membranes in the dehydration of ethanol, demonstrating the successful preparation of thin membranes with high permeation flux and separation factor by optimizing crystal growth conditions. The key factor affecting the permeability of the membrane was identified as the change in crystallographic orientation caused by aging, as indicated by SEM observation and XRD analysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Anas A. Ahmed, Z. H. Yamani
Summary: In this study, pure and SnO2 modified ZSM-5 zeolites were prepared using a hydrothermal method, with well-defined nanocrystalline structures and highly dispersed SnO2 nanoparticles. The SnO2 modified ZSM-5 zeolite showed chemiresistive sensitivity towards H-2 gas, with good performance and stability.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Supak Tontisirin, Chantaraporn Phalakornkule, Worawat Sa-ngawong, Supachai Sirisawat
Summary: The magnetic induction assisted technique is a new heating method for hydrothermal zeolite synthesis with a higher heat-transfer rate than conventional methods. The research showcases the potential application of magnetic induction heating technique and its higher heat-transfer efficiency.
Article
Engineering, Environmental
Yi-Jie Lin, Jyh-Cherng Chen
Summary: This study investigates the feasibility of recycling and reusing incineration fly ash for the synthesis of zeolite by alkali fusion and hydrothermal methods. The synthetic zeolite showed excellent adsorption capacity for iodine and heavy metals, while also effectively removing heavy metals and dioxins during the synthesis process. Overall, the quality of the synthetic zeolite was superior and it can be reused as an adsorbent and green material with a wide range of applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Zishu Cao, Landysh Iskhakova, Xinhui Sun, Junhang Dong
Summary: Single crystalline ZSM-5 ZNs with thicknesses around 6 nm were obtained using diquaternary bis-1,5(tripropyl ammonium) pentamethylene diiodide as a structure-directing agent. Ultrathin ZN-laminated membranes (ZNLMs) were fabricated and demonstrated proton-selective ion conduction with low resistances. The development of polymer-supported ZNLMs is hindered by the current inefficiency in preparing well-dispersed suspensions of open-pore ZNs. Efficient methods for synthesizing dispersed open-pore ZNs are key to realizing high-performance ZNLMs on polymers.
Article
Engineering, Chemical
Bin Wang, Haolin Wu, Liyun Cui, Haoliang Gao, Di Zhao, Junjing Zhou, Shenglai Zhong, Rongfei Zhou, Weihong Xing
Summary: In this study, we successfully synthesized 50-cm-long tubular silicalite-1 membranes and used them for the separation of industrial n-butane/i-butane mixtures for the first time. The membranes showed good reproducibility and exhibited excellent separation performance and stability. The results suggest that silicalite-1 membranes have great potential for the industrial separation of n-/i-butane mixtures.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Zishu Cao, Landysh Iskhakova, Xinhui Sun, Zhong Tang, Junhang Dong
Summary: A submicrometer-thick molecular sieve zeolite nanosheet laminated (ZNL) membrane has been synthesized on a macroporous polyvinylidene fluoride (PVDF) substrate, demonstrating extraordinary water flux and salt rejection in pervaporation desalination of high-salinity brines containing multiple ions. The densely layered nanosheets with large aspect ratios effectively prevent salt migration, resulting in stable performance in high-TDS brine desalination.
ACS APPLIED NANO MATERIALS
(2021)
Article
Multidisciplinary Sciences
Norihiro Moriyama, Akihiro Takeyama, Taichi Yamatoko, Ken-ichi Sawamura, Koji Gonoi, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: This study proposes a system using organosilica membranes to recover steam and latent heat from waste flue gases. Experimental tests in both laboratory and incinerator plant settings demonstrate the stability and high energy recovery efficiency of this system.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Eduardo Perez-Botella, Miguel Palomino, Gabriel B. Bafero, Heloise O. Pastore, Susana Valencia, Fernando Rey
Summary: The influence of framework topology on the separation of carbon dioxide from methane was studied in small pore pure silica zeolites with various structures. Pure silica materials were used to isolate the effect of framework topology. The results showed that materials with channel-like topology exhibited higher selectivity towards CO2 due to kinetic exclusion of methane. Si-ITW showed promising performance in CO2 separation, with high selectivity, diffusion rates, and moderate maximum capacity. It also had advantages over traditional zeolites in terms of energy requirements for regeneration and hydrophobicity.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Engineering, Environmental
Samar N. Abd Elwadood, K. Suresh Kumar Reddy, Yasser Al Wahedi, Ali Al Alili, Andreia S. F. Farinha, Geert-Jan Witkamp, Ludovic F. Dumee, Georgios N. Karanikolos
Summary: Water shortage has a severe impact on drought-stricken regions, affecting nearly half a billion people annually. Composites of Salt and Porous Matrix (CSPMs) show promise for water vapor sorption. In this study, CSPMs were synthesized by loading highly hygroscopic salts (LiCl and CaCl2) onto SAPO-34 porous crystals. The resulting composites exhibited higher water uptake and improved cyclability compared to the parent SAPO-34.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Mariam Ouda, Fawzi Banat, Shadi W. Hasan, Georgios N. Karanikolos
Summary: Microplastics and nanoplastics are emerging water and wastewater pollutants with high toxicity and low degradation. Nanotechnology-based strategies using nanomaterials offer efficient methods for the removal of these pollutants through adsorption, photocatalysis, and membrane filtration. This review critically assesses the relationship between properties and performance, highlights challenges such as quantification and the impact of other contaminants, and suggests process-specific considerations and limitations for further research and development.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Prabhu Azhagapillai, K. Suresh Kumar Reddy, Gerardo D. J. Guerrero Pena, Rukayat S. Bojesomo, Abhijeet Raj, Dalaver H. Anjum, Mirella Elkadi, Georgios N. Karanikolos, Mohamed I. Ali
Summary: This study utilized waste biowaste (crude glycerol residue from waste cooking oil transesterification) to fabricate mesoporous crude glycerol-based porous carbons (mCGPCs) using a template method, and compared them with commercial activated carbon and CMK-8 prepared using sucrose. The results showed that mCGPCs exhibited superior CO2 adsorption capacity, slightly lower than CMK-8 but higher than activated carbon. This study successfully synthesized a mesoporous carbon material using biowaste and demonstrated its application as a CO2 adsorbent.
Article
Chemistry, Multidisciplinary
Risheng Bai, Guangyuan He, Lin Li, Tianjun Zhang, Junyan Li, Xingxing Wang, Xiumei Wang, Yongcun Zou, Donghai Mei, Avelino Corma, Jihong Yu
Summary: In this work, a carbonization-reduction method was used to create palladium carbide subnanometric species within pure silicate MFI zeolite. The developed catalyst showed superior performance in the selective hydrogenation of alkynes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Solomon K. Gebremariam, Anish Mathai Varghese, K. Suresh Kumar Reddy, Yasser Fowad AlWahedi, Ludovic F. Dumoee, Georgios N. Karanikolos
Summary: This paper presents a study on the development of hybrid adsorbents for carbon capture. The researchers successfully hybridized a water-stable MOF with graphene oxide, yielding a hybrid adsorbent with enhanced CO2 capture performance. They then structured the hybrid into mechanically robust spherical beads using a novel and scalable strategy. The results showed that the structured beads maintained the performance characteristics of the original hybrid and exhibited high CO2 adsorption capacity, making them suitable for practical CO2 capture applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Francisco Gonell, Miriam Rodenes, Santiago Martin, Mercedes Boronat, Ivan Sorribes, Avelino Corma
Summary: Developing precious-metal-free electrocatalysts for the hydrogen evolution reaction (HER) is crucial. Amorphous molybdenum sulfide-based materials provide highly active HER electrocatalysts by introducing active sites at both the edge positions and the typically inactive basal planes. The bottom-up synthesis using molecular complexes with Mo3S4 and Mo3S7 cluster cores enhances the HER activity and allows the modification of the derived materials with atomic-scale precision.
CHEMISTRY OF MATERIALS
(2023)
Article
Engineering, Environmental
Fatema Khamis, Mahendra Kumar, Petros G. Koutsoukos, Fawzi Banat, Hassan A. Arafat, Georgios N. Karanikolos
Summary: In recent years, membrane technologies, particularly ultrafiltration, have emerged as a promising solution for water treatment. However, fouling remains a significant challenge in membrane applications, leading to a decline in membrane performance over time. To address this issue, the development of antifouling membranes has garnered considerable attention.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Luc Bondaz, Anshaj Ronghe, Shaoxian Li, Kristians Cernevics, Jian Hao, Oleg V. Yazyev, K. Ganapathy Ayappa, Kumar Varoon Agrawal
Summary: This study achieves precise control of Å-scale pores formation in graphene by controlling the oxidation temperature. By utilizing the core/shell structure of clusters and light gasification, improved control over pore formation is achieved compared to thermal gasification. The research also finds that these pores can differentiate CH4 from N-2, indicating potential separation applications.
Review
Materials Science, Multidisciplinary
Gabriele Scandura, Sana Eid, Ali A. Alnajjar, Twinkle Paul, Georgios N. Karanikolos, Dinesh Shetty, Khalid Omer, Rami Alqerem, Alaa Juma, Huanting Wang, Hassan A. Arafat, Ludovic F. Dumee
Summary: Stimuli-responsive metal-organic frameworks (MOFs) are versatile porous materials that can respond to external stimuli such as temperature, pressure, pH, and light. This review focuses on the design strategies for obtaining photo-responsive MOFs, including the encapsulation of photo-switchable molecules, fabrication of MOF composites, post-synthesis modification, and synthesis of MOFs with photo-responsive ligands. The review analyzes recent literature reports in terms of material chemistry and performance, compares different strategies, discusses future challenges, and addresses the fatigue issue of photo-responsive MOFs in prolonged irradiation cycling.
MATERIALS ADVANCES
(2023)
Article
Engineering, Chemical
Xueku Duan, Pinar Kaya, Heng-Yu Chi, Berna Topuz, Kumar Varoon Agrawal
Summary: In this study, ZIF-8 nanosheet membranes were prepared by directly filtering the growth solution over a porous polymeric support. The obtained membranes were compact, defect-free, and exhibited an ideal H2/C3H8 selectivity over 3000. This approach can be extended to other MOFs synthesized in nanosheet morphology, thereby advancing the scalability prospects of MOF membranes.
JOURNAL OF MEMBRANE SCIENCE LETTERS
(2023)
Review
Engineering, Environmental
Solomon K. Gebremariam, Ludovic F. Dumee, Philip L. Llewellyn, Yasser Fowad AlWahedi, Georgios N. Karanikolos
Summary: Metal-organic frameworks (MOFs) are promising adsorbent materials for CO2 capture. Hybridization with other materials can enhance their performance and overcome inherent drawbacks. This study critically reviews hybridized MOF adsorbents, providing insights and recommendations for further research in practical CO2 capture applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Lichen Liu, Avelino Corma
Summary: Heterogeneous bimetallic catalysts are widely used in industrial processes, but understanding the active sites in these catalysts at the atomic and molecular level is challenging due to their structural complexity. Comparing the structural features and catalytic performances of different bimetallic entities can aid in developing a unified understanding of the structure-reactivity relationships and improving current bimetallic catalysts. This review discusses the geometric and electronic structures of three representative types of bimetallic catalysts, as well as the synthesis methods, characterization techniques, and catalytic applications of these catalysts.
Article
Chemistry, Physical
Risheng Bai, Yue Song, Ge Tian, Fei Wang, Avelino Corma, Jihong Yu
Summary: The synthesis of highly efficient nano-sized Ti-rich TS-1 zeolites with controllable titanium species is crucial in zeolite catalytic reactions. A new method was developed using tetrabutyl orthotitanate tetramer as the titanium source, which slowed down the zeolite crystallization process and prevented the formation of anatase species. The Ti-rich TS-1 zeolite prepared with this method exhibited enriched active titanium species, enlarged external surface area, and superior catalytic performance in oxidative desulfurization reactions.
GREEN ENERGY & ENVIRONMENT
(2023)
Review
Chemistry, Multidisciplinary
Alexandra Velty, Avelino Corma
Summary: For many years, capturing, storing or sequestering CO2 from emission sources has been an effective method for reducing atmospheric CO2. The chemical conversion of CO2 into valuable chemicals has gained much attention due to CO2's abundance and renewable nature. Catalysts, particularly zeolite and ordered mesoporous materials, play a critical role in the conversion of CO2. By studying the reactions involving these catalysts, this review aims to explore the potential opportunities for using them to convert CO2 into essential chemicals and fuels.
CHEMICAL SOCIETY REVIEWS
(2023)
