Chemie Ingenieur Technik最新文献

{"title":"Shortcut Method for Solubility Prediction and Preferred Stability of Diastereomeric Cocrystals","authors":"Dr. Peerapon Rapeenun,&nbsp;Dr. Sarita Songsermsawad,&nbsp;Prof. Dr. Adrian E. Flood","doi":"10.1002/cite.202400085","DOIUrl":"https://doi.org/10.1002/cite.202400085","url":null,"abstract":"<p>Diastereomeric cocrystals are used in chiral separations. Cocrystal solubility of the diastereomers is necessary for process design. Here, we extend our cocrystal solubility prediction to diastereomeric cocrystals. In this work, cocrystals of malic acid and tartaric acid were studied in four different solvents. Results showed qualitative agreement with experimental data. Hence, the shortcut method can be applied for preliminary estimation of suitable solvents for resolution. The predicted solubility lines can also serve as a tool to identify the stability between diastereomeric cocrystals.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1613-1619"},"PeriodicalIF":1.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Starting Composition and Gelation Temperature on the Ratio between Meso- and Macropore Volume in Silica Xerogels with Bimodal Pore Structure","authors":"Kai Müller,&nbsp;Christian Andres,&nbsp;Simon Kunwald,&nbsp;Tim Jähnichen,&nbsp;Prof. Dr. Dirk Enke","doi":"10.1002/cite.202400099","DOIUrl":"https://doi.org/10.1002/cite.202400099","url":null,"abstract":"<p>The impact of gelation temperature and starting composition (solvent, silica, and polymer content) on the pore structure of silica xerogels with bimodal meso-/macropore structure is explored. Using statistical regression models, precise control over the pore structure is demonstrated, a challenge in previous studies. Higher gelation temperatures and increased polyethylene oxide (PEO) content enhance the mesopore volume, while higher solvent content and reduced polymer content increase the macropore volume. The ratio of mesopore to macropore volume can be effectively adjusted, facilitating the design of xerogels with tailored properties. These findings optimize silica xerogels with bimodal pore structure for applications in catalysis, thermal insulation, and other advanced technologies.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1726-1734"},"PeriodicalIF":1.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inhalt: Chem. Ing. Tech. 10/2024","authors":"","doi":"10.1002/cite.202471002","DOIUrl":"https://doi.org/10.1002/cite.202471002","url":null,"abstract":"","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 10","pages":"1328-1330"},"PeriodicalIF":1.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202471002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Apparate in herausfordernden Anwendungsfeldern","authors":"Prof. Dr.-Ing. Stephan Scholl","doi":"10.1002/cite.202400119","DOIUrl":"https://doi.org/10.1002/cite.202400119","url":null,"abstract":"<p>Verfahrenstechnische Apparate realisieren einen Prozess in einer konkreten Anwendungsumgebung. Oft sind dabei problematische Stoffsysteme zu prozessieren oder Betriebsbedingungen zu beherrschen, die besondere Herausforderungen an das verfahrenstechnische Design und den Betrieb der Apparate stellen. Beispiele sind schäumende Systeme in Verdampfungs- oder Desorptionsprozessen, Mulmbildung in Extraktoren, Tropfenmitriss aus Verdampfern, Flashbehältern oder an Kolonnenzuläufen oder Fouling, d. h. die unerwünschte Belagbildung auf wärme- und/oder stoffübertragenden Oberflächen. Für alle diese Phänomene gilt die Strategie <i>Vermeiden – Vermindern – Beherrschen</i>. Um dafür geeignete prozesstechnische, apparative oder betriebliche Maßnahmen zu testen und zu bewerten, sind einheitliche experimentelle Methoden erforderlich, die es erlauben, die Schaumneigung oder die Foulinganfälligkeit eines Stoffsystems, eines Apparates oder einer Betriebsweise unter definierten Bedingungen reproduzierbar zu quantifizieren. Erst dann können potentielle Abhilfemaßnahmen verlässlich bewertet und qualifiziert werden. Das vom Bundesministerium für Wirtschaft und Klimaschutz über den Projektträger Jülich geförderte Verbundprojekt „Entwicklung einer standardisierten Methodik für Design und Bewertung von Apparaten und Equipment in foulinggefährdeten Trennprozessen – SAMARA“ hat eine solche Methodik für Kristallisations- und organisches Fouling an metallischen und polymeren Wärmeübertragungsoberflächen sowie in Kolonnenpackungen entwickelt. Als Ergebnis stehen Standardapparaturen für Kolonnen und Wärmeübertrager sowie eine standardisierte Vorgehensweise mit empfohlenen Modellstoffsystemen zur Verfügung, die eine reproduzierbare Quantifizierung der Foulinganfälligkeit von Stoffsystemen oder Apparate- bzw. Equipmentausführungen erlauben. Die Standardisierung von Bewertungsmethoden erlaubt die Setzung von reproduzierbaren Referenzpunkten und unterstützt damit die Innovation und Einsatz neuer, besserer Produkte und Prozesse. Zur Unterstützung des Transfers dieser Ergebnisse liegt eine neue VDI-Richtlinie im Entwurf vor, die demnächst der interessierten Fachöffentlichkeit zur Kommentierung vorgelegt werden wird. Weitere Arbeiten in diesem Heft befassen sich mit Gestrickabscheidern zur Tropfenabscheidung sowie Verdampfung und Kondensation an komplexen Strukturen. Ich wünsche Ihnen Freude und die eine oder andere Inspiration bei der Lektüre der Beiträge.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 10","pages":"1327"},"PeriodicalIF":1.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Titelbild Chem. Ing. Tech. 10/2024","authors":"","doi":"10.1002/cite.202471001","DOIUrl":"https://doi.org/10.1002/cite.202471001","url":null,"abstract":"<p>Copyright: Chitsanupong @AdobeStock\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 10","pages":"1325"},"PeriodicalIF":1.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202471001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Herausragende Leistungen in der Chemie: Die GDCh-Preise im Herbst (Teil 2)","authors":"","doi":"10.1002/cite.202471003","DOIUrl":"https://doi.org/10.1002/cite.202471003","url":null,"abstract":"<p>Bereits in der letzten Ausgabe haben wir einige Wissenschaftler vorgestellt, die im Herbst von der Gesellschaft Deutscher Chemiker (GDCh) für ihre herausragenden Leistungen ausgezeichnet wurden. Im Folgenden präsentieren wir weitere Preisträgerinnen und Preisträger, die im Herbst von der GDCh geehrt wurden.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 10","pages":"1332-1333"},"PeriodicalIF":1.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202471003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Überblick Inhalt: Chem. Eng. Technol. 10/2024","authors":"","doi":"10.1002/cite.202471004","DOIUrl":"https://doi.org/10.1002/cite.202471004","url":null,"abstract":"","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 10","pages":"1443"},"PeriodicalIF":1.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202471004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Numerical Study on the Influence of Confining Walls on Drag and Heat Transfer Coefficients in Single-Particle Lab-Scale Reactors","authors":"Philipp Reinold,&nbsp;Martin Kutscherauer,&nbsp;Prof. Gregor D. Wehinger","doi":"10.1002/cite.202400083","DOIUrl":"https://doi.org/10.1002/cite.202400083","url":null,"abstract":"<p>Single-particle reactors in lab-scale are a promising technology to gain an in-depth understanding of the intricate reaction and transport processes that occur in catalyst particles under operando conditions. It is not described whether the effect of the bounding walls in such narrow flow channels influence the processes at the particle. Therefore, this work applies three-dimensional (3D) computational fluid dynamics (CFD) simulations to analyze the drag coefficient <i>C</i>_D alongside the local and average particle Nusselt number <i>Nu</i>_p as characteristic local and integral quantities in the range of particle Reynolds numbers 10 ≤ <i>Re</i>_p ≤ 10³. An equation is derived to correct for the wall effects on <i>C</i>_D and <i>Nu</i>_p and assist the experimenter in the interpretation of measured results.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1595-1603"},"PeriodicalIF":1.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400083","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential of Innovative Concepts STEM Education for Industry 4.0: CrossLab an Example","authors":"Dr. Ines Aubel,&nbsp;Prof. Dr. Sebastian Zug,&nbsp;Prof. Dr. Martin Bertau","doi":"10.1002/cite.202400114","DOIUrl":"https://doi.org/10.1002/cite.202400114","url":null,"abstract":"<p>The integration of practical, laboratory-based training in STEM education is of paramount importance. However, traditional methods may prove inadequate in addressing the evolving demands of Industry 4.0. The CrossLab project represents a transformative approach, whereby a modular, interdisciplinary, and cross-institutional digital laboratory environment is created. This initiative enhances the flexibility, scalability, and collaborative potential of laboratory experiences, thereby equipping students with essential skills in digital literacy, data analysis, and interdisciplinary collaboration. The CrossLab framework represents a novel approach that effectively integrates traditional and digital methods, thereby preparing students for the complexities of Industry 4.0.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 11","pages":"1455-1459"},"PeriodicalIF":1.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142525487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two Optimization Approaches for a Small-Scale Power-to-Ammonia Cycle","authors":"M.Sc. Pascal Koschwitz,&nbsp;B.Sc. Leon Roß,&nbsp;Prof. Dr.-Ing. Bernd Epple","doi":"10.1002/cite.202300230","DOIUrl":"https://doi.org/10.1002/cite.202300230","url":null,"abstract":"<p>Ammonia is a promising carbon-free energy vector. Small-scale renewable power-to-ammonia (P2A) is particularly suited for isolated agricultural areas where ammonia can be used as fuel and fertilizer. This work compares two approaches to simulate and optimize the steady-state behavior of a novel small-scale P2A process: Aspen Plus^® and MOSAIC^®. Aspen Plus^® is a commercial flow sheeting software whereas MOSAIC^® is a freeware where equations and thermochemical properties need to be specified by hand. It can be shown that the results of MOSAIC^® and Aspen Plus^® are qualitatively comparable, but not identical. This suggests that the model in MOSAIC^® can be improved further, starting with the implementation of a more accurate numeric reactor kinetics and equation of state.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"97 1-2","pages":"71-82"},"PeriodicalIF":1.5,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202300230","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}