Pub Date : 2023-09-09DOI: 10.1016/j.coche.2023.100955
Erica Gagliano , Pietro P. Falciglia , Yeakub Zaker , Nazmiye C. Birben , Tanju Karanfil , Paolo Roccaro
Per- and polyfluoroalkyl substances (PFAS), man-made ‘forever chemicals’, have been extensively released into the environment. Currently, adsorption is the chief option for removing PFAS from contaminated water. However, the regeneration and reactivation of PFAS-laden adsorbents are still a challenging task, and several investigations are ongoing to find the most suitable technology. The current state of research and development on available techniques for PFAS-laden adsorbents, mainly granular activated carbons (GACs), is provided in this article with a particular focus on thermal-based processes. Despite the growing research on PFAS degradation pathways, future investigations are needed to systematically assess the interplay between PFAS and co-adsorbed organic and inorganic species and to pursue on-site regeneration avoiding further transportation and/or disposal of exhausted materials.
{"title":"State of the research on regeneration and reactivation techniques for per- and polyfluoroalkyl substances (PFAS)-laden granular activated carbons (GACs)","authors":"Erica Gagliano , Pietro P. Falciglia , Yeakub Zaker , Nazmiye C. Birben , Tanju Karanfil , Paolo Roccaro","doi":"10.1016/j.coche.2023.100955","DOIUrl":"https://doi.org/10.1016/j.coche.2023.100955","url":null,"abstract":"<div><p>Per- and polyfluoroalkyl substances (PFAS), man-made ‘forever chemicals’, have been extensively released into the environment. Currently, adsorption is the chief option for removing PFAS from contaminated water. However, the regeneration and reactivation of PFAS-laden adsorbents are still a challenging task, and several investigations are ongoing to find the most suitable technology. The current state of research and development on available techniques for PFAS-laden adsorbents, mainly granular activated carbons (GACs), is provided in this article with a particular focus on thermal-based processes. Despite the growing research on PFAS degradation pathways, future investigations are needed to systematically assess the interplay between PFAS and co-adsorbed organic and inorganic species and to pursue on-site regeneration avoiding further transportation and/or disposal of exhausted materials.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"42 ","pages":"Article 100955"},"PeriodicalIF":6.6,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91986375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-05DOI: 10.1016/j.coche.2023.100954
Lucas DS Vargette , Nathalie De Coensel , Kevin De Ras , Ruben Van de Vijver , Stefan Voorspoels , Kevin M Van Geem
Per- and polyfluoroalkyl substances (PFAS) are a class of man-made chemicals found in various consumer goods due to their unique properties. Failing abatement techniques and improper waste management result in the release of these chemicals into the environment (diluted in soil, water, and air) causing detrimental effects to human health. Therefore, a variety of novel technologies is currently under development to destroy PFAS. Thermal destruction using active materials has the potential to achieve full mineralization of the fluorine atoms. Nevertheless, two major challenges need to be overcome to remove doubts about the destruction efficiency and enable further optimization: 1) which combination of process conditions/dedicated destruction techniques/active materials can lead to complete mineralization and 2) incomplete mass balance closure by currently employed analysis techniques.
Owing to the complexity of matrices and the myriad of intermediate and incomplete PFAS degradation compounds, a single ‘fit-for-all’ analytical standard/method likely does not exist. Therefore, a holistic combination of targeted, semi-targeted, and nontargeted analyses is required to obtain maximally comprehensive insight into the PFAS degradation compounds. The volatile degradation products can be analyzed via comprehensive two-dimensional gas chromatography coupled with high-resolution mass spectrometry (HRMS). Nonvolatiles can be trapped and analyzed via ultraperformance liquid chromatography coupled with high-resolution mass spectrometry and triple-quadrupole mass spectrometry, and a myriad of elemental analysis techniques. In addition, also the remaining solid residue needs to be extracted and analyzed via specific methods to quantify the PFAS content in the solid residues.
{"title":"Prospects of complete mineralization of per- and polyfluoroalkyl substances by thermal destruction methods","authors":"Lucas DS Vargette , Nathalie De Coensel , Kevin De Ras , Ruben Van de Vijver , Stefan Voorspoels , Kevin M Van Geem","doi":"10.1016/j.coche.2023.100954","DOIUrl":"10.1016/j.coche.2023.100954","url":null,"abstract":"<div><p>Per- and polyfluoroalkyl substances (PFAS) are a class of man-made chemicals found in various consumer goods due to their unique properties. Failing abatement techniques and improper waste management result in the release of these chemicals into the environment (diluted in soil, water, and air) causing detrimental effects to human health. Therefore, a variety of novel technologies is currently under development to destroy PFAS. Thermal destruction using active materials has the potential to achieve full mineralization of the fluorine atoms. Nevertheless, two major challenges need to be overcome to remove doubts about the destruction efficiency and enable further optimization: 1) which combination of process conditions/dedicated destruction techniques/active materials can lead to complete mineralization and 2) incomplete mass balance closure by currently employed analysis techniques.</p><p>Owing to the complexity of matrices and the myriad of intermediate and incomplete PFAS degradation compounds, a single ‘fit-for-all’ analytical standard/method likely does not exist. Therefore, a holistic combination of targeted, semi-targeted, and nontargeted analyses is required to obtain maximally comprehensive insight into the PFAS degradation compounds. The volatile degradation products can be analyzed via comprehensive two-dimensional gas chromatography coupled with high-resolution mass spectrometry<span> (HRMS). Nonvolatiles can be trapped and analyzed via ultraperformance liquid chromatography coupled with high-resolution mass spectrometry and triple-quadrupole mass spectrometry, and a myriad of elemental analysis techniques. In addition, also the remaining solid residue needs to be extracted and analyzed via specific methods to quantify the PFAS content in the solid residues.</span></p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"42 ","pages":"Article 100954"},"PeriodicalIF":6.6,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44400769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.1016/j.coche.2023.100950
Lauryn A Spearing , Miriam Tariq , Haniye Safarpour , Thomas Abia , Matt Mallory , Jeff Guild , Lynn E Katz , Kasey M Faust
Many sectors are threatened by water stress, creating a pressing need to explore the use of alternative water sources or water reuse. There has been an increase in innovative water treatment technologies to leverage such sources, yet many of these innovations have been slow to implement. Here, we discuss that this could be due to a lack of focus on factors outside of technical and economic considerations usually explored. There is a need to focus our attention on the organizational factors that can either drive or hinder water treatment technology uptake. Using a case study from the chemical sector, we show how the decision-making process behind technology adoption is complex and that we must capture perspectives from multiple types of stakeholders.
{"title":"Moving beyond techno-economic considerations: incorporating organizational constraints into fit-for-use technologies","authors":"Lauryn A Spearing , Miriam Tariq , Haniye Safarpour , Thomas Abia , Matt Mallory , Jeff Guild , Lynn E Katz , Kasey M Faust","doi":"10.1016/j.coche.2023.100950","DOIUrl":"10.1016/j.coche.2023.100950","url":null,"abstract":"<div><p>Many sectors are threatened by water stress, creating a pressing need to explore the use of alternative water sources or water reuse. There has been an increase in innovative water treatment technologies to leverage such sources, yet many of these innovations have been slow to implement. Here, we discuss that this could be due to a lack of focus on factors outside of technical and economic considerations usually explored. There is a need to focus our attention on the organizational factors that can either drive or hinder water treatment technology uptake. Using a case study from the chemical sector, we show how the decision-making process behind technology adoption is complex and that we must capture perspectives from multiple types of stakeholders.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"42 ","pages":"Article 100950"},"PeriodicalIF":6.6,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48374969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Owing to their distinct collaboration nature, high atom usage, and high catalytic performance, single-atom catalysts have become most dynamically studied in various catalytic reactions. Graphitic carbon nitride (g-C3N4), as one of the most promising two-dimensional supports for stable immobilization of single-atom metals, has received extensive investigations. In this review, the recent developments of g-C3N4-supported single-atom photocatalysts for hydrogen evolution are summarized, with the metal-support interactions and structure regulations for stable and efficient catalysis being highlighted. Finally, the difficulties and potentials for future development of g-C3N4-supported single-atom materials in photocatalytic hydrogen evolution are proposed.
{"title":"Advances in carbon nitride supported single-atom photocatalysts for hydrogen evolution","authors":"Fanpeng Meng , Zhihao Tian , Wenjie Tian , Huayang Zhang","doi":"10.1016/j.coche.2023.100941","DOIUrl":"10.1016/j.coche.2023.100941","url":null,"abstract":"<div><p><span>Owing to their distinct collaboration nature, high atom usage, and high catalytic performance, single-atom catalysts have become most dynamically studied in various catalytic reactions<span>. Graphitic carbon nitride (g-C</span></span><sub>3</sub>N<sub>4</sub>), as one of the most promising two-dimensional supports for stable immobilization of single-atom metals, has received extensive investigations. In this review, the recent developments of g-C<sub>3</sub>N<sub>4</sub>-supported single-atom photocatalysts for hydrogen evolution are summarized, with the metal-support interactions and structure regulations for stable and efficient catalysis being highlighted. Finally, the difficulties and potentials for future development of g-C<sub>3</sub>N<sub>4</sub><span>-supported single-atom materials in photocatalytic hydrogen evolution are proposed.</span></p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"41 ","pages":"Article 100941"},"PeriodicalIF":6.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44754209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1016/j.coche.2023.100949
Haitao Yang , Huigang Zhang , Qingshan Zhu , Jiaxin Cheng , Puheng Yang , Zhen Wang , Renze Xu
Green electricity from solar energy has achieved rapid development. However, solar power is intermittent and fluctuating, whereas industrial productions are generally continuous. To overcome the contradiction, either expensive large-scale energy storage technologies are deployed, or new industrial production processes are developed to adapt to the intermittent characteristics of solar energy. This approach may be referred to as the flexible production mode. Here, we propose a solar-to-iron flexible production system, which includes electrochemical ironmaking and iron-based energy power systems (iron–air batteries and iron powder combustion). The flexible electrochemical ironmaking system produces iron in the sunshine when there is renewable electricity and is also able to standby in the dark. The produced iron could be delivered for common needs or releases energy again by iron–air batteries or iron powder combustion. Such a loop may transform the current ironmaking technologies, reduce carbon dioxide emission, and accommodate peak-shaving/load-shifting concurrently.
{"title":"Flexible solar-to-iron system: a new concept and its implementation","authors":"Haitao Yang , Huigang Zhang , Qingshan Zhu , Jiaxin Cheng , Puheng Yang , Zhen Wang , Renze Xu","doi":"10.1016/j.coche.2023.100949","DOIUrl":"10.1016/j.coche.2023.100949","url":null,"abstract":"<div><p>Green electricity from solar energy has achieved rapid development. However, solar power is intermittent and fluctuating, whereas industrial productions are generally continuous. To overcome the contradiction, either expensive large-scale energy storage technologies are deployed, or new industrial production processes are developed to adapt to the intermittent characteristics of solar energy. This approach may be referred to as the flexible production mode. Here, we propose a solar-to-iron flexible production system, which includes electrochemical ironmaking and iron-based energy power systems (iron–air batteries and iron powder combustion). The flexible electrochemical ironmaking system produces iron in the sunshine when there is renewable electricity and is also able to standby in the dark. The produced iron could be delivered for common needs or releases energy again by iron–air batteries or iron powder combustion. Such a loop may transform the current ironmaking technologies, reduce carbon dioxide emission, and accommodate peak-shaving/load-shifting concurrently.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"41 ","pages":"Article 100949"},"PeriodicalIF":6.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44843112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1016/j.coche.2023.100931
Jun Wang , Simeng Bi , Yang Zhang , Yi Shen , Lun Lu , Xiaoguang Duan , Xiaoyao Tan , Shaobin Wang
Single-atom catalysts (SACs) have been extensively employed for peroxymonosulfate-based advanced oxidation processes (PMS-AOPs), because of the maximum atomic efficiency offered by homogeneous-dispersed metal atoms and facile recyclability attained by the heterogeneous substrate. Intriguingly, though SACs with atomically isolated metal–nitrogen moieties have shown exceptional activities in PMS-AOP-based water treatment, their catalytic performances and mechanisms varied with the structures. In this review, the catalytic mechanisms of SACs/PMS systems were summarized. Specifically, nonradical reactive oxygen species are involved in the majority of the reactions, while singlet oxygenation, electron-transfer, and high-valent metal-oxo species are identified as dominant nonradical pathways. We also discussed the effects of metal center, metal loading, and substrate on the overall catalytic activities and mechanisms in PMS-AOPs. The pivotal roles of coordination environment in modulating the activity of SACs and reaction pathways were highlighted. Furthermore, an outlook on future challenges and prospective for SACs in water purification is presented.
{"title":"Single-atom coordination-dependent catalysis for peroxymonosulfate-mediated water purification","authors":"Jun Wang , Simeng Bi , Yang Zhang , Yi Shen , Lun Lu , Xiaoguang Duan , Xiaoyao Tan , Shaobin Wang","doi":"10.1016/j.coche.2023.100931","DOIUrl":"10.1016/j.coche.2023.100931","url":null,"abstract":"<div><p><span>Single-atom catalysts (SACs) have been extensively employed for peroxymonosulfate-based advanced oxidation processes (PMS-AOPs), because of the maximum atomic efficiency offered by homogeneous-dispersed metal atoms and facile recyclability attained by the heterogeneous substrate. Intriguingly, though SACs with atomically isolated metal–nitrogen moieties have shown exceptional activities in PMS-AOP-based water treatment, their catalytic performances and mechanisms varied with the structures. In this review, the catalytic mechanisms of SACs/PMS systems were summarized. Specifically, nonradical reactive oxygen species are involved in the majority of the reactions, while singlet oxygenation, electron-transfer, and high-valent metal-oxo species are identified as dominant nonradical pathways. We also discussed the effects of metal center, metal loading, and substrate on the overall catalytic activities and mechanisms in PMS-AOPs. The pivotal roles of coordination environment in modulating the activity of SACs and reaction pathways were highlighted. Furthermore, an outlook on future challenges and prospective for SACs in </span>water purification is presented.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"41 ","pages":"Article 100931"},"PeriodicalIF":6.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47035287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1016/j.coche.2023.100922
Sichun Yang, Zhiwen Zhang, Haijiao Lu, Lianzhou Wang
Anthropogenic accumulation of atmospheric carbon dioxide (CO2) rises many environmental issues, including global warming, ocean acidification, and glacial ablation. Electrocatalytic carbon dioxide reduction reaction (CO2RR) is an efficient approach to reducing atmospheric CO2 concentration as well as producing value-added chemicals. Single-atom electrocatalysts (SAECs) have attracted much attention due to their remarkable electrocatalytic performance. The synthetic methods of SAECs can significantly affect the structure and, thus the catalytic performance of energy conversion reactions like CO2RR. However, the underlying mechanism of the impacts has been largely overlooked. The focus of this short review is to reveal the correlation of synthetic methods with the catalytic performance of SAECs for CO2RR and provide insights for future research in this field.
{"title":"How synthetic methods of single-atom electrocatalysts affect the catalytic performance of carbon dioxide reduction","authors":"Sichun Yang, Zhiwen Zhang, Haijiao Lu, Lianzhou Wang","doi":"10.1016/j.coche.2023.100922","DOIUrl":"10.1016/j.coche.2023.100922","url":null,"abstract":"<div><p><span>Anthropogenic accumulation of atmospheric carbon dioxide (CO</span><sub>2</sub><span>) rises many environmental issues, including global warming, ocean acidification, and glacial ablation. Electrocatalytic carbon dioxide reduction reaction (CO</span><sub>2</sub>RR) is an efficient approach to reducing atmospheric CO<sub>2</sub> concentration as well as producing value-added chemicals. Single-atom electrocatalysts (SAECs) have attracted much attention due to their remarkable electrocatalytic performance. The synthetic methods of SAECs can significantly affect the structure and, thus the catalytic performance of energy conversion reactions like CO<sub>2</sub>RR. However, the underlying mechanism of the impacts has been largely overlooked. The focus of this short review is to reveal the correlation of synthetic methods with the catalytic performance of SAECs for CO<sub>2</sub>RR and provide insights for future research in this field.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"41 ","pages":"Article 100922"},"PeriodicalIF":6.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54233918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1016/j.coche.2023.100930
Adam P Harvey , Ibrahim A Mohammed , Usman Dahiru , Kui Zhang
In non-thermal plasmas (NTPs), molecules and atoms are activated and excited by strong electric fields resulting in nonequilibrium between the species, unlike very high temperatures required by ‘thermal plasmas’ as a result of the equilibrium temperature between the species. As such, various chemical reactions can be activated by NTPs at relatively low temperatures and ambient pressure in NTPs, even where temperatures of 100s or even 1000s of oC required using conventional chemistry. This opens many diverse opportunities for the intensification of manufacturing processes. This review will give an overview of some of the key opportunities for the application of NTPs for PI in the chemical industry.
{"title":"Opportunities for process intensification using non-thermal plasmas","authors":"Adam P Harvey , Ibrahim A Mohammed , Usman Dahiru , Kui Zhang","doi":"10.1016/j.coche.2023.100930","DOIUrl":"10.1016/j.coche.2023.100930","url":null,"abstract":"<div><p>In non-thermal plasmas (NTPs), molecules and atoms are activated and excited by strong electric fields resulting in nonequilibrium between the species, unlike very high temperatures required by ‘thermal plasmas’ as a result of the equilibrium temperature between the species. As such, various chemical reactions can be activated by NTPs at relatively low temperatures and ambient pressure in NTPs, even where temperatures of 100s or even 1000s of oC required using conventional chemistry. This opens many diverse opportunities for the intensification of manufacturing processes. This review will give an overview of some of the key opportunities for the application of NTPs for PI in the chemical industry.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"41 ","pages":"Article 100930"},"PeriodicalIF":6.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211339823000345/pdfft?md5=26ee830241b2d949b3f7f6a6863204d1&pid=1-s2.0-S2211339823000345-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43489061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1016/j.coche.2023.100948
Kuo Liu , Tao Zhang
Single-atom catalysts (SACs) have gained more and more attention due to their unique properties and behavior in the field of environmental catalysis. Recently, the number of reports on application of SACs in automobile and stationary emission control is growing. Especially, utilization of SACs in the removal of nitrogen oxides (NOx) has attracted many researchers. This review summarizes various SACs used in selective catalytic reduction (SCR) of NOx by NH3 (NH3–SCR), carbon monoxide (CO–SCR), hydrocarbons (HC–SCR), and H2 (H2–SCR). The challenges in application of SACs in the field of NOx emission control and suggestion for future research are also provided.
{"title":"Single-atom catalysts for nitrogen oxide emission control","authors":"Kuo Liu , Tao Zhang","doi":"10.1016/j.coche.2023.100948","DOIUrl":"10.1016/j.coche.2023.100948","url":null,"abstract":"<div><p><span>Single-atom catalysts (SACs) have gained more and more attention due to their unique properties and behavior in the field of environmental catalysis. Recently, the number of reports on application of SACs in automobile and stationary emission control is growing. Especially, utilization of SACs in the removal of nitrogen oxides (NO</span><sub><em>x</em></sub>) has attracted many researchers. This review summarizes various SACs used in selective catalytic reduction (SCR) of NO<sub><em>x</em></sub> by NH<sub>3</sub> (NH<sub>3</sub><span>–SCR), carbon monoxide (CO–SCR), hydrocarbons (HC–SCR), and H</span><sub>2</sub> (H<sub>2</sub>–SCR). The challenges in application of SACs in the field of NO<sub><em>x</em></sub> emission control and suggestion for future research are also provided.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"41 ","pages":"Article 100948"},"PeriodicalIF":6.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42697145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1016/j.coche.2023.100940
Haitao Li , Jian Liu
As an emerging area, single-atom catalysts (SACs), in the past decade, have sparked tremendous research interests in various fields due to maximum atom utilization and excellent catalytic activity. Recently, SACs have been extended to peroxymonosulfate (PMS)-mediated advanced oxidation processes for organic wastewater remediation. In the current perspective, we first briefly overviewed typical synthetic methods and characterization techniques for metal–organic framework (MOF)-derived SACs. Then, we highlighted the degradation applications of various refractory organic pollutants via SAC/PMS systems. Subsequently, the catalytic mechanisms as well as the variety of reactive species were discussed. Finally, we proposed several future development directions for MOF-based SACs in environmental remediation.
{"title":"Metal–organic framework-derived single-atom catalysts for peroxymonosulfate-mediated organic wastewater remediation","authors":"Haitao Li , Jian Liu","doi":"10.1016/j.coche.2023.100940","DOIUrl":"10.1016/j.coche.2023.100940","url":null,"abstract":"<div><p><span>As an emerging area, single-atom catalysts (SACs), in the past decade, have sparked tremendous research interests in various fields due to maximum atom utilization and excellent catalytic activity. Recently, SACs have been extended to peroxymonosulfate (PMS)-mediated advanced oxidation processes for organic wastewater remediation. In the current perspective, we first briefly overviewed typical synthetic methods and characterization techniques for metal–organic framework (MOF)-derived SACs. Then, we highlighted the degradation applications of various refractory </span>organic pollutants via SAC/PMS systems. Subsequently, the catalytic mechanisms as well as the variety of reactive species were discussed. Finally, we proposed several future development directions for MOF-based SACs in environmental remediation.</p></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"41 ","pages":"Article 100940"},"PeriodicalIF":6.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48618874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}