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Stirring up success 成功的源泉
Nature Chemical Engineering Pub Date : 2024-09-02 DOI: 10.1038/s44286-024-00119-0
Mahdokht Soltani, Julie E. Rorrer
{"title":"Stirring up success","authors":"Mahdokht Soltani, Julie E. Rorrer","doi":"10.1038/s44286-024-00119-0","DOIUrl":"10.1038/s44286-024-00119-0","url":null,"abstract":"Dimensionless numbers are used to describe and optimize mass transport in catalytic systems but have not yet been established for three-phase reactions in waste polyolefin deconstruction. Now, a criterion is introduced to enhance catalyst effectiveness in polyolefin hydrogenolysis, guiding the refinement of stirring parameters.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 9","pages":"557-558"},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave-heated solvent extraction and catalysis for end-of-life tire decontamination 用于报废轮胎净化的微波加热溶剂萃取和催化技术
Nature Chemical Engineering Pub Date : 2024-08-29 DOI: 10.1038/s44286-024-00114-5
Siddhesh S. Borkar, Jenna Vito, Manish Shetty
{"title":"Microwave-heated solvent extraction and catalysis for end-of-life tire decontamination","authors":"Siddhesh S. Borkar, Jenna Vito, Manish Shetty","doi":"10.1038/s44286-024-00114-5","DOIUrl":"10.1038/s44286-024-00114-5","url":null,"abstract":"The development of environmentally friendly methods for the decontamination of tires at their end of life is critical. Now, microwave-assisted solvent extraction and catalytic conversion of a toxic antioxidant contained in tires to safe, industrially useful chemicals has been demonstrated.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 9","pages":"561-562"},"PeriodicalIF":0.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
End-of-life tire decontamination from 6PPD and upcycling 利用 6PPD 对报废轮胎进行净化和再循环利用
Nature Chemical Engineering Pub Date : 2024-08-29 DOI: 10.1038/s44286-024-00110-9
Sean Najmi, Pooja Bhalode, Montgomery Baker-Fales, Brandon C. Vance, Esun Selvam, Kewei Yu, Weiqing Zheng, Dionisios G. Vlachos
{"title":"End-of-life tire decontamination from 6PPD and upcycling","authors":"Sean Najmi, Pooja Bhalode, Montgomery Baker-Fales, Brandon C. Vance, Esun Selvam, Kewei Yu, Weiqing Zheng, Dionisios G. Vlachos","doi":"10.1038/s44286-024-00110-9","DOIUrl":"10.1038/s44286-024-00110-9","url":null,"abstract":"N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) is a ubiquitous rubber antioxidant and antiozonant that extends the lifetime of common rubber products, such as those found in tires. It transforms into a quinone derivative following certain environmental conditions. 6PPD and the quinone can leach into the environment and cause severe morbidity to aquatic life at diminutive concentrations, with health effects on humans still not fully understood. With legislation on the horizon to ban 6PPD entirely, developing effective methods for its removal and conversion to safe compounds is essential. Here we show that 6PPD survives microwave-assisted pyrolysis and escapes in the oil product, rendering decontamination essential. We introduce a decontamination strategy that removes 6PPD from end-of-life tires before it enters the broader ecosystem. We demonstrate the catalytic upgrade of 6PPD to safe chemicals and the valorization of crumb rubber to aromatics and carbon black using microwave-assisted pyrolysis. Upcycling end-of-life tire waste is complex due to the recalcitrant nature of the toxic legacy additive, 6PPD. Here the authors present a new decontamination strategy that can isolate 6PPD, convert it to safe and valuable products, and valorize end-of-life tire waste.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 9","pages":"597-607"},"PeriodicalIF":0.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of transport phenomena in catalyst effectiveness for chemical polyolefin recycling 评估化学聚烯烃再循环催化剂效能中的迁移现象
Nature Chemical Engineering Pub Date : 2024-08-28 DOI: 10.1038/s44286-024-00108-3
Shibashish D. Jaydev, Antonio J. Martín, David Garcia, Katia Chikri, Javier Pérez-Ramírez
{"title":"Assessment of transport phenomena in catalyst effectiveness for chemical polyolefin recycling","authors":"Shibashish D. Jaydev, Antonio J. Martín, David Garcia, Katia Chikri, Javier Pérez-Ramírez","doi":"10.1038/s44286-024-00108-3","DOIUrl":"10.1038/s44286-024-00108-3","url":null,"abstract":"Since the dawn of agitated brewing in the Paleolithic era, effective mixing has enabled efficient reactions. Emerging catalytic chemical polyolefin recycling processes present unique challenges, considering that the polymer melt has a viscosity three orders of magnitude higher than that of honey. The lack of protocols to achieve effective mixing may have resulted in suboptimal catalyst effectiveness. In this study, we have tackled the hydrogenolysis of commercial-grade high-density polyethylene and polypropylene to show how different stirring strategies can create differences of up to 85% and 40% in catalyst effectiveness and selectivity, respectively. The reaction develops near the H2–melt interface, with the extension of the interface and access to catalyst particles the main performance drivers. Leveraging computational fluid dynamics simulations, we have identified a power number of 15,000–40,000 to maximize the catalyst effectiveness factor and optimize stirring parameters. This temperature- and pressure-independent model holds across a viscosity range of 1–1,000 Pa s. Temperature gradients may quickly become relevant for reactor scale-up. The importance of optimizing the contact between catalyst particles, hydrogen and plastic melt in polyolefin chemical recycling has been overlooked, leading to suboptimal performance. The authors develop a criterion based on the dimensionless power number to optimize catalyst effectiveness. Stirring conditions can now be selected to treat commercial-grade polyethylene and polypropylene.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 9","pages":"565-575"},"PeriodicalIF":0.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44286-024-00108-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Illuminating pathways for nanoparticle superlattice self-assembly 照亮纳米粒子超晶格自组装之路
Nature Chemical Engineering Pub Date : 2024-08-15 DOI: 10.1038/s44286-024-00104-7
Taylor J. Woehl
{"title":"Illuminating pathways for nanoparticle superlattice self-assembly","authors":"Taylor J. Woehl","doi":"10.1038/s44286-024-00104-7","DOIUrl":"10.1038/s44286-024-00104-7","url":null,"abstract":"The final structure of nanoparticle self-assembly intimately depends on the assembly pathway, which has remained obscure due to a lack of sufficiently high-spatiotemporal-resolution direct imaging approaches. Now, combining liquid-cell transmission electron microscopy with molecular dynamics simulations uncovers the complete dynamics of solvent-dependent assembly and phase transitions of nanocube superlattices.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 8","pages":"504-505"},"PeriodicalIF":0.0,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A mathematical argument for teaching faculty 教师教学的数学论证
Nature Chemical Engineering Pub Date : 2024-08-15 DOI: 10.1038/s44286-024-00100-x
Robert H. Davis
{"title":"A mathematical argument for teaching faculty","authors":"Robert H. Davis","doi":"10.1038/s44286-024-00100-x","DOIUrl":"10.1038/s44286-024-00100-x","url":null,"abstract":"Robert H. Davis argues quantitatively how hiring more teaching faculty could boost both research and teaching.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 8","pages":"552-552"},"PeriodicalIF":0.0,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Timing the electricity market 把握电力市场的时机
Nature Chemical Engineering Pub Date : 2024-08-14 DOI: 10.1038/s44286-024-00113-6
Mo Qiao
{"title":"Timing the electricity market","authors":"Mo Qiao","doi":"10.1038/s44286-024-00113-6","DOIUrl":"10.1038/s44286-024-00113-6","url":null,"abstract":"","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 8","pages":"498-498"},"PeriodicalIF":0.0,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scalable graphene current collectors for enhanced thermal management in batteries 增强电池热管理的可扩展石墨烯电流收集器
Nature Chemical Engineering Pub Date : 2024-08-14 DOI: 10.1038/s44286-024-00105-6
{"title":"Scalable graphene current collectors for enhanced thermal management in batteries","authors":"","doi":"10.1038/s44286-024-00105-6","DOIUrl":"10.1038/s44286-024-00105-6","url":null,"abstract":"A protocol is demonstrated for the fabrication of dense and defect-free graphene current collectors on the hundred-meter scale. Owing to their high thermal conductivity and dense structures, these current collectors effectively prevent thermal runaway in high-energy pouch cells through the dissipation of localized heat and circumvention of undesirable side reactions, enhancing battery safety.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 8","pages":"506-507"},"PeriodicalIF":0.0,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A refuel for heavy-duty transportation 为重型运输工具加油
Nature Chemical Engineering Pub Date : 2024-08-14 DOI: 10.1038/s44286-024-00111-8
Yanfei Zhu
{"title":"A refuel for heavy-duty transportation","authors":"Yanfei Zhu","doi":"10.1038/s44286-024-00111-8","DOIUrl":"10.1038/s44286-024-00111-8","url":null,"abstract":"","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 8","pages":"497-497"},"PeriodicalIF":0.0,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemical engineering, broadly speaking 广义的化学工程
Nature Chemical Engineering Pub Date : 2024-08-14 DOI: 10.1038/s44286-024-00120-7
{"title":"Chemical engineering, broadly speaking","authors":"","doi":"10.1038/s44286-024-00120-7","DOIUrl":"10.1038/s44286-024-00120-7","url":null,"abstract":"In this Editorial, we discuss how a broad chemical engineering journal can serve the community.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":"1 8","pages":"495-495"},"PeriodicalIF":0.0,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44286-024-00120-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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