Article
Chemistry, Inorganic & Nuclear
Peng Wang, Mengxiang Gan, Puhui Deng, Yongfen Xu, Yu Hou
Summary: Phosphotungstic acid-loaded zirconium dioxide (HPW@ZrO2) nanoparticles with excellent oxidative desulfurization performance were prepared and characterized. The material showed efficient removal of DBT from simulated oil and maintained good recyclability after multiple cycles. Additionally, it exhibited good desulfurization performance for gasoline as well.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Xinsheng Li, Shuo Ai, Yongchun Huang, Chengdu Huang, Wanguo Yu, Zhijuan Mao
Summary: In this study, metallic copper loaded on SBA-15 mesoporous silica proved to be an efficient adsorbent for the removal of DBT in fuel oils. Analysis using Raman spectroscopy, XPS, and Auger spectroscopy provided insights into the interaction mechanism between DBT and copper, and the complete recovery of adsorption capacity was achieved successfully.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Engineering, Environmental
Siming Guo, Qingjun Yu, Shunzheng Zhao, Xiaolong Tang, Ya Wang, Yiming Ma, Yuhan Long, Honghong Yi
Summary: Sulfocompounds in flue gas can affect pipeline stability and air quality. Porous materials like carbon-based materials, molecular sieves, metal oxides, and MOFs can be used to adsorb these compounds. Adsorption mechanisms and regenerating methods for porous materials are summarized in this study.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Yang Liu, Junjie Liao, Liping Chang, Weiren Bao
Summary: This paper investigates the adsorption performance of silver-modified mesoporous materials in removing thiophenic compounds. The results show that the adsorption of thiophene by the sorbents involves S-Ag and pi complexation reactions, and the adsorption efficiency is greatly affected by benzene. XPS analysis reveals that silver interacts strongly with the carrier and forms Ag-O-Si bonds as the active centers for thiophenic compounds. The Mulliken charges of sulfur atoms have an impact on the interactions between silver and thiophene sulfur compounds.
Article
Energy & Fuels
Nilesh Mohan Khalse, Mahuya De
Summary: This study investigated the effect of nitrogen doping on the adsorptive removal of sulfur compounds from model fuel. Nitrogen doping improved the surface area and pore volume of templated carbon, thereby enhancing the adsorption capacity of sulfur compounds. The adsorption-regeneration cycles showed that the removal efficiency was only lowered by 4-10% after five cycles.
Article
Chemistry, Applied
Ammar T. Khadim, Talib M. Albayati, Noori M. Cata Saady
Summary: In this study, sulfur compounds were successfully removed from real diesel fuel using a continuous system with encapsulated mesoporous material with cobalt. The effects of bed height and flow rate on the efficiency of sulfur removal were investigated, and optimal operating conditions were determined. The results showed that Co/MCM-41 can be effectively used for sulfur concentration removal in fixed-bed adsorption systems.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Leticia F. Rasteiro, Abdul Motin, Luiz H. Vieira, Elisabete M. Assaf, Francisco Zaera
Summary: The atomic layer deposition of ZrO2 thin films over mesopores of SBA-15 was studied using TDMAZ as ZrO2 precursor. The thickness of the films was controlled by the number of deposition cycles. The homogeneous distribution of ZrO2 throughout the SBA-15 pores was confirmed by various characterization techniques. The deposition rate was observed to slow down after 4 cycles, possibly due to mass transport limitations caused by the chemisorption properties of TDMAZ and the pore diameter of SBA-15.
Article
Chemistry, Applied
Fazle Subhan, Sobia Aslam, Zifeng Yan, Muhammad Yaseen
Summary: This study successfully synthesized micro-mesoporous silica (MMZ) using dissolution and self-assembly method, and improved the adsorption capacity of thiophene by enhancing active sites and structural properties. The adsorption capacity of MMZ was higher than traditional ZSM-5 materials, and the ADS activity towards thiophene can be recovered well.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Thuy T. T. Ngo, Eric Besson, Emily Bloch, Sandrine Bourrelly, Richard Llewellyn, Stephane Gastaldi, Philip L. Llewellyn, Didier Gigmes, Trang N. T. Phan
Summary: A new approach for polymer functionalization of ordered mesoporous silicas (OMS) was demonstrated by cocondensation of silica precursor and a functional polymer, using a tailored amphiphilic copolymer as pore template. The novel strategy allows for incorporation of the functional polymer into the mesoporous silica, resulting in materials with high specific surface area and large pores, and acceptable CO2 adsorption capacity with selectivity towards CH4 and N2.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Silvio Dantas, Katie Cychosz Struckhoff, Matthias Thommes, Alexander V. Neimark
Summary: The study introduces a new method for evaluating pore structures in carbon materials, using high-pressure CO2 adsorption isotherms to determine the pore size distribution in both micro- and mesopores. By utilizing Monte Carlo simulations and meso-canonical ensemble methods, capillary condensation transitions in mesopores were successfully predicted, demonstrating the feasibility of the technique in micro-mesoporous carbon materials.
Article
Polymer Science
Adriana Robledo-Peralta, Linda Viviana Garcia-Quinonez, Rene Rodriguez-Beltran, Liliana Reynoso-Cuevas
Summary: This research developed biocomposite materials from Valence orange and Red Delicious apple peels as adsorbents for fluoride removal. The materials were chemically treated and impregnated with zirconium, resulting in increased surface area and composition changes. The experimental data fitted the Langmuir model, suggesting chemisorption occurs in monolayers. The bioadsorbents showed promising potential for continuous system studies.
Article
Chemistry, Physical
Elmehdi Moumen, Samir El Hankari
Summary: It has been discovered that a zirconium-based metal-organic framework (MOF-808) can serve as a source of zirconium for synthesizing zirconium phosphate (ZrP) with discrete disc nanocrystals. These nanocrystals, ranging in size from 4.8 to 5.2 nm, are typically obtained at high temperatures or high phosphoric acid concentrations. In comparison to conventionally obtained ZrP, the ZrP derived from the zirconium MOF under similar conditions exhibits dispersed particles with more active and accessible adsorption sites, leading to more efficient removal of cadmium. The cadmium removal performance of this ZrP was found to be 88.27 mg/g, while conventional ZrP achieved 67.48 mg/g under the same conditions, providing clear evidence of the advantages of using Zr-MOF as a template for designing novel nanostructured materials with enhanced removal efficiency.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Sonalika Sonal, Sourav Acharya, Brijesh Kumar Mishra
Summary: The key design of new adsorbents aims to improve their physical, chemical, and surface properties to enhance selectivity and regeneration efficiency. Two adsorbents, wet oxidative and ultrasonicated zirconium impregnated composite, were synthesized using wet oxidation and ultrasonication methods. Wet oxidation showed higher competence in impregnating zirconium and developing diverse porosity and functionalities. The wet oxidative adsorbent demonstrated a higher adsorption capacity and better regeneration performance compared to raw activated carbon. It can effectively remove stubborn toxic dyes and has potential for industrial-scale applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Somayeh Ostovar, Hamideh Saravani, Daily Rodriguez-Padron
Summary: A family of sulfonamide functionalized mesoporous materials was successfully synthesized and exhibited high catalytic activity and stability for biomass valorization reactions; these materials showed promising performance in levulinic acid and benzyl alcohol catalytic reactions, indicating potential applications in biomass upgrading processes.
Review
Chemistry, Physical
Dmitrii Grozdov, Inga Zinicovscaia
Summary: Rapid development in technology, industry, and agriculture has led to the release of a large amount of pollutants, including metal ions, into the environment. Due to their toxicity and persistence, heavy metals have become a major concern, causing adverse effects on the environment and population. Municipal and industrial effluents need to be treated thoroughly before being discharged or used for irrigation. This review focuses on mesoporous materials and discusses their synthesis and application in wastewater treatment, highlighting the mechanisms of metal adsorption and presenting examples of their multiple uses for metal removal. The information in this review can be utilized by researchers and environmental engineers involved in the development of new adsorbents and improvement of wastewater treatment technologies.
Article
Chemistry, Physical
Seongmin Jin, Hyukjun Byun, Chang-Ha Lee
Summary: Tuning the properties of metal oxides is crucial for enhancing the activity of metal oxide-supported catalysts. By introducing abundant defects into MgO, its limited reducibility can be overcome, leading to increased catalytic activity. Increasing the MgO content and temperature significantly promotes the reconstruction of active surface oxygen, demonstrating the feasibility of using nonreducible MgO as an active support for reactions where redox properties are important.
JOURNAL OF CATALYSIS
(2021)
Article
Thermodynamics
Atefeh Rezaei, Peyman Pakzad, Masoud Mofarahi, Amir Abbas Izadpanah, Morteza Afkhamipour, Chang-Ha Lee
Summary: The densities and viscosities of three solutions were measured and various volumetric and viscometric characteristics were calculated to explain the experimental results. The properties were analyzed through intermolecular interactions and molecular structures to determine the viscous flows of the solutions. The obtained thermodynamic properties can be utilized in the design and optimization of a CO2-capture process.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Chemistry, Multidisciplinary
Dong-Hoon Oh, Chang-Ha Lee, Jae-Cheol Lee
Summary: This study designed four alternative NGCC-based process schemes and found that NGCC-CLC processes could produce higher net power than NGCC-MEA. Among them, NGCC-CLC with excess air and steam turbine integration was considered as the most efficient process scheme for generating power from natural gas.
Article
Materials Science, Paper & Wood
Eugene Huh, Ji-Hyun Yang, Chang-Ha Lee, Ik-Sung Ahn, Byung Jin Mhin
Summary: The 3D-RISM-KH theory combined with KBI was used to study the role of alkali metal hydroxides in cellulose solvation. The results showed that Li+ hydrates had the closest interaction with cellulose due to their high charge density, explaining the difference in cellulose solubilities in different aqueous solutions.
Review
Thermodynamics
Kwang-Jun Ko, Hyokyung Kim, Young-Ho Cho, Haeryeong Lee, Kyung-Min Kim, Chang-Ha Lee
Summary: This review summarizes the CO adsorption performances of various adsorbents, discusses their physical and chemical properties, CO selectivities, and compares the effects of Cu+ impregnation on CO adsorption. The data and analysis provided in this review can contribute to the development of novel adsorbents and processes for CO removal and production.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Chemistry, Analytical
Maengkyo Oh, Keunyoung Lee, Kwang-Wook Kim, Richard Foster, Chang-Ha Lee
Summary: The applicability of uranium peroxide precipitation method for removing uranium from secondary wastewaters has been studied. Optimized conditions were applied to achieve high removal efficiency within a short time. The method also removed other impurities and met the criteria for secondary wastewater discharge.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Energy & Fuels
Khayyam Mehrabi, Ali Bakhtyari, Masoud Mofarahi, Chang-Ha Lee
Summary: This study develops a simple and accurate density calculation model for amino acid salt solutions (AASs) and evaluates it using artificial neural networks (ANNs). The results show that the developed correlation has excellent performance in predicting the densities of AASs, and ANNs can accurately calculate the densities.
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)
Review
Thermodynamics
Seo Ryung Jeong, Jung Hyeok Park, Jun Hyeong Lee, Pil Rip Jeon, Chang-Ha Lee
Summary: This study reviews the adsorption of CO2, CH4, and their mixture on coals and shales, and discusses the properties of coals and shales that influence adsorption. The heterogeneous properties of coals and shales make it difficult to develop prediction models, but the use of machine learning models and the combination of thermodynamic models and machine learning models show potential for creating a universal prediction model for CO2/CH4 adsorption on various types of coals and shales.
FLUID PHASE EQUILIBRIA
(2023)
Article
Engineering, Environmental
Hyokyung Kim, Kwang-Jun Ko, Masoud Mofarahi, Kyung-Min Kim, Chang-Ha Lee
Summary: This study elucidates the adsorption characteristics of low-concentration tetrahydrothiophene (THT) and tert-butyl mercaptan (TBM) in CH4 on Cu-impregnated activated carbon (Cu/AC). THT removal is dominated by physical adsorption, allowing facile regeneration by N2 thermal treatment. TBM removal is primarily carried out by chemical adsorption utilizing CuO, Cu2O, and oxygen on the AC.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Zhiwei Zhang, Dong-Hoon Oh, Vo Dat Nguyen, Chang-Ha Lee, Jae-Cheol Lee
Summary: This study developed NGCC power plants integrated with CCU and compared them with a conventional NGCC power plant with postcombustion carbon capture. Case 2 showed the lowest CO2 emissions and Case 3 had the highest electricity generation due to lower CO2 utilization pressure. The economic analysis showed that Case 3 had the best performance in terms of capital and operating expenditures and annual revenue.
Article
Engineering, Environmental
Zhiwei Zhang, Dat-Nguyen Vo, Jaesung Kum, Suk-Hoon Hong, Chang-Ha Lee
Summary: This study aims to improve the energy efficiency of a monoethanolamine (MEA)-based CO2 capture process by developing advanced process modules that utilize low-grade waste heat. Cascade modules were found to have outstanding energy-saving performance, with an average improvement of 50% over single modules. Economic analysis showed that the advanced process modules were economically feasible, with a savings-to-investment ratio exceeding 1. The cascade module for direct heat supply was identified as the most appropriate option in terms of both economic viability and energy-saving efficiency in amine-based CO2 capture processes, particularly at a higher equivalence factor (EF).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Dat-Nguyen Vo, Jae Hun Chang, Suk-Hoon Hong, Chang-Ha Lee
Summary: In this study, a novel configuration of a three-bed temperature swing adsorption (TSA) process using zeolite 4A and machine learning-based optimization was developed for effective NH3 removal. The proposed configuration performed the best in a techno-economic comparison and consumed a small amount of cost for NH3 removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Vo Dat Nguyen, JaeHun Chang, Suk-Hoon Hong, Chang-Ha Lee
Summary: An advanced CTM process was developed to produce high-purity methanol from a wet CO2 source. By optimizing process parameters, the methanol yield and CO2 reduction can be increased while the production cost is decreased.
Article
Green & Sustainable Science & Technology
Rakyoung Jeon, Shin Hyuk Kim, Kwangjun Ko, Kihyun Kwon, Myungkyu Park, Ireh Seo, Min Oh, Chang-Ha Lee
Summary: This study evaluated the performance of three newly designed cartridges for next-generation gas respirators. Through flow analysis and breakthrough experiments, the researchers assessed the adsorption kinetics and computational fluid dynamics (CFD) of the cartridges. The study found that virtual engineering can be utilized to improve CFD simulation and optimize cartridge design.
JOURNAL OF CLEANER PRODUCTION
(2023)