Separation and Purification Technology最新文献

Enhanced self-regenerating CPNs@ZIF-8/polyacrylic acid/chitosan hydrogel catalyst for synergistic adsorption and fenton-like degradation of erythromycin

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132823

Detian Dou, Youduo Zhao, Chenyu Yang, Jingjing Deng, Lushi Lian, Tianshu Zhou

{"title":"Enhanced self-regenerating CPNs@ZIF-8/polyacrylic acid/chitosan hydrogel catalyst for synergistic adsorption and fenton-like degradation of erythromycin","authors":"Detian Dou, Youduo Zhao, Chenyu Yang, Jingjing Deng, Lushi Lian, Tianshu Zhou","doi":"10.1016/j.seppur.2025.132823","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132823","url":null,"abstract":"Erythromycin (ERY) is a commonly used antibiotic whose overuse poses threats to ecosystems and human health, and its effective removal is a great challenge. A novel Coupling Adsorption-Catalysis (CAC) process was developed using a dual-functional copper peroxide nanoparticles@ZIF-8/polyacrylic acid/chitosan (CPNs@ZIF-8/PA/CS) hydrogel Fenton-like catalyst. The CAC process combines the adsorption capabilities of active functional groups on CPNs@ZIF-8/PA/CS with the catalytic activity of the encapsulated CPNs@ZIF-8. This synergistic approach enables efficient adsorption and degradation of ERY. Specifically, CPNs@ZIF-8/PA/CS exhibits an adsorption efficiency four times higher than that of CS alone and a degradation efficiency twice that of CPNs@ZIF-8 alone. Notably, the coordinated incentive mechanism in the CAC system arises from enhanced adsorption sites in CPNs@ZIF-8/PA/CS and hydrogen bonding with ERY molecules (confirmed by DFT calculations), which enhances ERY adsorption. Additionally, the shorter distance between adsorbed ERY and active species, along with improved mass transfer efficiency, ensures the feasibility of creating environmental value from ERY in aquatic environments through CAC. Moreover, CPNs@ZIF-8/PA/CS demonstrates significant advantages in recyclability and stability. The robust mechanical properties enable sustained catalytic degradation of ERY, ensuring high performance even after five cycles.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tubular SiC membranes in brine purification: Effects of operational parameters towards low energy consumption process

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132736

Xiangzhi Xue, Zheng Liang, Jian Zhou, Huiqin Zhang, Qilin Gu, Zhaoxiang Zhong, Weihong Xing

{"title":"Tubular SiC membranes in brine purification: Effects of operational parameters towards low energy consumption process","authors":"Xiangzhi Xue, Zheng Liang, Jian Zhou, Huiqin Zhang, Qilin Gu, Zhaoxiang Zhong, Weihong Xing","doi":"10.1016/j.seppur.2025.132736","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132736","url":null,"abstract":"Brine purification process using ceramic membrane has the advantages of short process, high filtration precision, low cost and long life. Silicon carbide (SiC) ceramic membranes are featured by excellent hydrophilicity and unique negatively charged surface. This work focused on the application of low-temperature reaction bonded SiC membranes in brine purification, and commercial SiC membranes prepared by the recrystallisation method were also adopted for comparison. Under low-energy conditions (transmembrane pressure ≤ 0.1 MPa, crossflow velocity ≤ 2 m·s-1), the low-temperature reaction bonded SiC membranes exhibited higher stable flux and superior antifouling performance (i.e., lower flux decline), attributed to the formation of a cake layer on the membrane surface. However, at high pressures (>0.1 MPa) and velocities (>2 m·s-1), some precipitated particles entered the pores of reaction bonded SiC membranes, resulting minor pore blockage, reducing permeability. Interestingly, the gradually increased initial permeate flux observed in cycling filtration was attributed to the increased surface hydrophilicity of SiC membranes. Therefore, low temperature reaction bonded SiC membranes can provide a high-efficient and energy-saving brine purification process in the chlor-alkali industry.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"58 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct oxidation of ammonia to dinitrogen through persulfate activation by coal-based activated carbon: Selectivity and mechanism

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132752

Yong Liu, Hanling Jiang, Le Zhang, Chenxi Wu, Jianlong Wang

{"title":"Direct oxidation of ammonia to dinitrogen through persulfate activation by coal-based activated carbon: Selectivity and mechanism","authors":"Yong Liu, Hanling Jiang, Le Zhang, Chenxi Wu, Jianlong Wang","doi":"10.1016/j.seppur.2025.132752","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132752","url":null,"abstract":"Removal of ammonia nitrogen (NH4+-N) from water and wastewater with low C/N ratios by advanced oxidation processes (AOPs) is crucial for guaranteeing the safety of drinking water and preventing eutrophication in aquatic environment. Conventional AOPs tend to over-oxidize NH4+-N to nitrite or nitrate and potentially interfere with the water and wastewater matrix. Herein, we proposed a strategy for direct oxidation of NH4+-N to N2 through activating persulfate (PS) by coal-based activated carbon (AC) in the presence of MgO. In the AC/MgO/PS process, NH4+-N oxidation mostly occurred via non-radical pathways (1O2 and electron transfer). The high selectivity of direct oxidation of NH4+-N was due to the following four reasons: (1) MgO made NH4+-N exist predominantly in the form of NH3 in solution; (2) electronic shuttle function of AC enhanced the electron transfer from NH3/N2H4 to PS to form N2; (3) AC surface contains various functional groups, such as C=O, which may catalyze the conversion of N2H4 and NO intermediates to form N2; (4) sulfur components in AC reduced the nitrite/nitrate product to N2. AC/MgO/PS process could be used to oxidize NH4+-N in polluted groundwater. This work offers a new AOP for chemical treatment of NH4+-containing water and wastewater","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"12 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acid-Resistant triazine-amine-based Polyamide-Sulfonamide nanofiltration membranes for efficient acidic wastewater treatment

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132762

Mo-Wen Li, Wen-Hai Zhang, Hong Meng, Weiliang Gu, Xuehong Zhang, Hongxia Guo

{"title":"Acid-Resistant triazine-amine-based Polyamide-Sulfonamide nanofiltration membranes for efficient acidic wastewater treatment","authors":"Mo-Wen Li, Wen-Hai Zhang, Hong Meng, Weiliang Gu, Xuehong Zhang, Hongxia Guo","doi":"10.1016/j.seppur.2025.132762","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132762","url":null,"abstract":"The discharge of acidic wastewater poses a significant environmental challenge to sustainable industrial development, underscoring the urgent need for advanced technologies capable of efficient water and acid resource recovery. Nanofiltration (NF) as a promising approach, yet the high-performance acid-resistant membrane is still in great demand. Herein, an acid-resistant NF membrane is designed and prepared by generating sulfonamide groups from the large-size triazine amine monomer and 1,3,6-naphthalene trisulfonyl trichloride (NTSC). Specifically, the acid-resistant nanofiltration membrane was fabricated via interfacial polymerization using the synthesized N2,N4,N6-tris(2-aminoethyl)-1,3,5-triazine-2,4,6-triamine (TET) with NTSC and 1,3,5-benzenetricarbonyl trichloride (TMC). Owing to the reduced density of amide bonds in the separation layer caused by the increased spatial dimensions of the TET monomer and the formation of sulfonamide structures, the resulting membrane demonstrated high stability under harsh acidic condition, maintaining 97.3 % of rejection for Na2SO4 along with 4.87 LMH·bar−1 of water permeability, even after prolonged exposure to 15 % H2SO4 for 80 days. This work introduces a novel strategy to enhance the membrane stability in acid environment, offering a promising candidate for practical applications in acidic wastewater treatment.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"64 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous removal of aniline and Sb(V) from wastewater in an integrated electrocoagulation and electro-Fenton system

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132827

Yaxiong Zeng, Wenxiang Liu, Xueni Huang, Xiaotian Yang, Beimeng Qi, Jie Yu, Hailu Fu

{"title":"Simultaneous removal of aniline and Sb(V) from wastewater in an integrated electrocoagulation and electro-Fenton system","authors":"Yaxiong Zeng, Wenxiang Liu, Xueni Huang, Xiaotian Yang, Beimeng Qi, Jie Yu, Hailu Fu","doi":"10.1016/j.seppur.2025.132827","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132827","url":null,"abstract":"Heavy metal–organic compound complexes are commonly found in textile dye wastewater, seriously threatening human health. This work proposes a unique integrated electrocoagulation and electro-Fenton (EC-EF) system combining an Fe anode and a carbon-felt-loaded hydroxylated carbon nanotubes (CNTs-OH/CF) cathode for the simultaneous removal of aniline and Sb(V) from wastewater. Under optimal conditions of initial pH of 3.0, NaCl concentration of 0.15 mol/L, and current density of 30 A m−2, the EC-EF system removed almost 100 % of aniline in 40 min and of Sb(V) in 10 min, with an energy consumption equal to 2.01 KWh kg−1. The excellent performance derived from the usage of the CNTs-OH/CF cathode increased the number of active sites, hydrophobicity, and electrical conductivity, facilitating the oxygen reduction reaction and electron transfer, thus enhancing the in situ-produced hydrogen peroxide (H2O2) with a concentration of 644.53 mg/L, exceeding most reported values. Furthermore, hydroxyl radicals (•OH), the dominant active species generated through the reactions of Fe2+ with electro generated H2O2, promoted the degradation of aniline. Meanwhile, Sb(V) was adsorbed by the ferric hydroxide formed at the anode and finally co-precipitated. The excellent reusability after five cycles and outstanding catalytic activity towards real wastewater demonstrate the superiority of the developed system for treating wastewater in practical applications. This study presents a unique integrated technology and a theoretical foundation for the simultaneous removal of heavy metal–organic compound complexes from wastewater.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"31 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid reduction of chloramphenicol by sodium bicarbonate-activated biochar loaded with nano zero-valent iron: Influence of pyrolysis parameters and the key role of graphitic carbon structure 碳酸氢钠活化生物炭负载纳米零价铁对氯霉素的快速还原：热解参数的影响和石墨碳结构的关键作用

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132826

Xiting Li, Haoran Dong, Shuangjie Xiao, Junmin Deng, Mengxi Zhao, Siqi Zhang, Chang Zhang, Xing Li

{"title":"Rapid reduction of chloramphenicol by sodium bicarbonate-activated biochar loaded with nano zero-valent iron: Influence of pyrolysis parameters and the key role of graphitic carbon structure","authors":"Xiting Li, Haoran Dong, Shuangjie Xiao, Junmin Deng, Mengxi Zhao, Siqi Zhang, Chang Zhang, Xing Li","doi":"10.1016/j.seppur.2025.132826","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132826","url":null,"abstract":"In this study, sodium bicarbonate (NaHCO3)-modified biochar (mBC) obtained at a modification ratio of 2:1 was used to load nano zero-valent iron (nZVI) for the removal of chloramphenicol (CAP). nZVI@mBC removed 98.7% of CAP within 60 min, much higher than naked nZVI (45.0%) and unmodified biochar-loaded nZVI (nZVI@BC) (50.7%). The effects of pyrolysis parameters (modification ratio (m[NaHCO3]/m[biomass]), pyrolysis temperature, heating rate, and holding time) on the ability of biochar to load nZVI were systematically investigated. The results showed that the modification ratio and pyrolysis temperature had a large influence on the loading property of mBC. The mechanism of nZVI@mBC for efficient CAP removal was explored. NaHCO3-modification promoted the formation of pore and graphite structures of biochar, and facilitated the uniform loading of nZVI. Electrochemical analysis showed that nZVI@mBC reduced CAP by direct electron transfer pathway (DET). The key graphitic carbon structure of mBC promoted the formation of iron-carbon galvanic cell, which favored electron transfer and led to better decontamination performance of nZVI@mBC. In addition, nitro reduction and dechlorination were identified as the main pathways for CAP degradation. Finally, the performance of nZVI@mBC for CAP removal in complex environments was explored to determine its environmental suitability. This study comprehensively analyzed the effects of different pyrolysis conditions on the loading capacity of modified biochar, and also elucidated the key graphitic structure of modified biochar to promote pollutant removal, which can provide a reference for the structural design of biochar-based carriers.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"73 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacially Polymerized zwitterionic Thin-Film composite membranes with AEPBS for enhanced pervaporation performance in alcohol dehydration

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132807

Joaquin Paolo V. Alcantara, Marwin R. Gallardo, Jeremiah C. Millare, Blessie A. Basilia, Chi-Lan Li, Hui-An Tsai, Shu-Hsien Huang, Kueir-Rarn Lee

{"title":"Interfacially Polymerized zwitterionic Thin-Film composite membranes with AEPBS for enhanced pervaporation performance in alcohol dehydration","authors":"Joaquin Paolo V. Alcantara, Marwin R. Gallardo, Jeremiah C. Millare, Blessie A. Basilia, Chi-Lan Li, Hui-An Tsai, Shu-Hsien Huang, Kueir-Rarn Lee","doi":"10.1016/j.seppur.2025.132807","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132807","url":null,"abstract":"The development of high-performance membranes for pervaporation applications requires the precise design and optimization of surface functionality to enhance water selectivity and transport efficiency. In this study, thin-film composite (TFC) membranes were modified using zwitterionic N-aminoethyl piperazine butane sulfonate (AEPBS) to improve separation performance. The functionalization process involved a two-step reaction: interfacial polymerization of polyethyleneimine (PEI) with trimesoyl chloride (TMC) followed by the covalent grafting of AEPBS. Fourier-transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed the successful incorporation of zwitterionic sulfonate groups, significantly altering the membrane surface chemistry and enhancing hydrophilicity, as evidenced by reduced water contact angles. Morphological analysis revealed an increase in surface roughness and layer thickness, attributed to the functionalization process. The AEPBS-modified membrane achieved exceptional pervaporation performance, with a permeation flux of 2267.84 ± 138.09 g/m2·h and a separation factor of 1364.47 during alcohol dehydration using 70 wt% isopropanol (IPA) feed at 25 °C. Systematic variation of AEPBS concentration and grafting time revealed optimal conditions at 0.2 wt% AEPBS and 1-minute grafting, achieving the highest pervaporation separation index (PSI) of 3.09 × 10⁶ g/m2·h. The membrane demonstrated robust performance under diverse operating conditions, including varying feed temperatures and water concentrations, and maintained consistent separation efficiency during 168 h of continuous operation. These findings validate the potential of AEPBS-modified membranes for industrial applications, particularly in energy-efficient alcohol dehydration processes.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"75 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CF4 removal using liquid Sn alloy: Thermodynamic alloy design and experimental validation

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132838

Kyungho Shin, Marie-Aline Van Ende, In-Ho Jung, Jung Hyeon Park, Uendo Lee, Hyeonjin Eom, Whi Dong Kim

{"title":"CF4 removal using liquid Sn alloy: Thermodynamic alloy design and experimental validation","authors":"Kyungho Shin, Marie-Aline Van Ende, In-Ho Jung, Jung Hyeon Park, Uendo Lee, Hyeonjin Eom, Whi Dong Kim","doi":"10.1016/j.seppur.2025.132838","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132838","url":null,"abstract":"The tight emission control of fluorinated gases such as PFCs, NF3, and SF6, extensively used in the semiconductor manufacturing process, is critical for reducing greenhouse gases and mitigating global warming. This study employed liquid Sn alloy to remove CF4 gas, known for its strong bond energy among F-gases. Thermodynamic calculations were conducted with FactSage thermodynamic databases to design the most effective binary Sn alloy systems: Sn-Mg and Sn-Ca alloys. Through the bubble column apparatus, the N2-CF4 gas was bubbled into the selected liquid Sn alloys at 600 to 800 ℃, and outlet gas was analyzed using gas chromatography. The removal efficiency of CF4 increased with temperature and concentration of reactive metal such as Mg and Ca. The efficiency of liquid Sn-Mg alloy was higher than that of liquid Sn-Ca alloy. More than 99 % removal of CF4 gas was successfully obtained using liquid Sn-40 at.% Mg alloy at 800 ℃ by forming MgF2 phase. The present study demonstrates that this novel approach using liquid Sn alloy can remove F-gases efficiently.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"5 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “MIL-101(FeII3,Mn) with dual-reaction center as Fenton-like catalyst for highly efficient peroxide activation and phenol degradation” [Sep. Purif. TechnoL. 306 (2023) 122582]

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132753

Peipei Huang, Qing Chang, Guodong Jiang, Keru Xiao, Xu Wang

引用次数: 0

Insights into enhancement of low-temperature NH3-SCR activity and SO2 resistance of TiO2/CoMnFeOx LDOs catalysts: Combination of experimental and DFT calculations

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132819

Zhenyu Chen, Jiarong Zhao, Yanshan Gao, Xiaozhe Song, Guocheng Liu, Shuaishuai Xin, Chengzhi Zhou, Yanjun Xin, Qiang Wang, Qinghua Yan

{"title":"Insights into enhancement of low-temperature NH3-SCR activity and SO2 resistance of TiO2/CoMnFeOx LDOs catalysts: Combination of experimental and DFT calculations","authors":"Zhenyu Chen, Jiarong Zhao, Yanshan Gao, Xiaozhe Song, Guocheng Liu, Shuaishuai Xin, Chengzhi Zhou, Yanjun Xin, Qiang Wang, Qinghua Yan","doi":"10.1016/j.seppur.2025.132819","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132819","url":null,"abstract":"Layered double hydroxides (LDHs) material was used as a precursor, and combined with TiO2 material characteristics, TiO2/CoMnFeOx LDOs composite material was controllable prepared for NH3-SCR denitration technology. At a wide temperature range of 200-300℃, the optimized TiO2(0.5)/Co0.5Mn1.5Fe1Ox catalyst had denitration efficiency exceeding 98 %, and N2 selectivity exceeding 85 % at 200℃. Advanced analytical techniques explored the structure and physicochemical properties of the catalyst materials, and the abundant active species and surface oxygen, moderate surface acids and redox capacity together promoted the NH3-SCR reaction. The transient reaction revealed that the TiO2(0.5)/Co0.5Mn1.5Fe1Ox catalyst reduced the production of N2O by inhibiting the “NH3 + O2 + NOx” pathway. Moreover, TiO2(0.5)/Co0.5Mn1.5Fe1Ox catalyst exhibited good resistance stability against SO2 and H2O. In situ DRIFTS analysis and DFT calculations provide insight into the mechanism of catalytic reaction and resistance to poisoning. This work provided strategies for improving the NH3-SCR activity and application stability of catalysts, which were important for the development of low-temperature denitration technology.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"22 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0