Chemie Ingenieur Technik最新文献

{"title":"Influencing Factors on the Wet Impregnation of Additive-Manufactured Catalyst Support Structures","authors":"Sebastian Wilmes,&nbsp;Prof. Dr.-Ing. Olaf Hinrichsen","doi":"10.1002/cite.202400090","DOIUrl":"https://doi.org/10.1002/cite.202400090","url":null,"abstract":"<p>The wet impregnation of additive manufactured aluminum oxide cylinders with platinum is investigated. The influence of five parameters on the penetration depth and the platinum loading is evaluated. A smaller penetration depth is obtained by increasing pH, sodium chloride concentration in the impregnation solution, decreasing impregnation solution volume, heating rate during subsequent calcination, and no vacuum during prewetting before the impregnation. A pH range of 2 to 4, a low chloride concentration, a small liquid volume, and no vacuum drawing lead to high platinum uptake. This investigation is crucial in understanding and optimizing the wet impregnation process, providing practical guidance for future research with more complex structures.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1668-1675"},"PeriodicalIF":1.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400090","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707465","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":"Crystallization-Based Separation of ε-Caprolactam from a Depolymerization Reaction Mixture – Fundamentals and Potential Separation Strategies","authors":"Axel Schultheis,&nbsp;Dr. Vico Tenberg,&nbsp;Prof. Liisa Rihko-Struckmann,&nbsp;Prof. Kai Sundmacher,&nbsp;apl. Prof. Heike Lorenz","doi":"10.1002/cite.202400120","DOIUrl":"https://doi.org/10.1002/cite.202400120","url":null,"abstract":"<p>Depolymerization and subsequent capture of monomers is of interest for process efficiency and sustainability. Polyamide-6 (PA-6) can be depolymerized in aqueous solution using a homogeneous catalyst. To purify the ε-caprolactam (CPL) monomer and recycle the catalyst, two potential crystallization-based strategies are studied: direct crystallization from the reaction mixture and liquid-liquid extraction prior to crystallization. Solubilities in water and promising organic solvents were measured and compared to predictions using perturbed-chain statistical associating fluid theory (PC-SAFT) or conductor-like screening model for real solvents (COSMO-RS). Detailed solid-liquid equilibria (SLE) of the CPL/water system were investigated utilizing DSC and PXRD. This work provides an overview of important factors of PA-6 depolymerization including recycling of tungstophosphoric acid (TPA) and purification of CPL monomers. A first conceptual process design to be further developed is derived.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1620-1631"},"PeriodicalIF":1.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400120","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707533","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":"Monitoring Transient Sorption of Hexane Isomer Mixtures in a Large ZSM-5 Single Crystal via Infrared Microimaging","authors":"Patricia Seidel,&nbsp;Dr. Seungtaik Hwang,&nbsp;Aastha Kasera,&nbsp;Dr. Michael Goepel,&nbsp;Dr. Christian Chmelik,&nbsp;Prof. Dr. Randall Q. Snurr,&nbsp;Prof. Dr. Jörg Kärger,&nbsp;Prof. Dr. Roger Gläser","doi":"10.1002/cite.202400112","DOIUrl":"https://doi.org/10.1002/cite.202400112","url":null,"abstract":"<p>Infrared (IR) microimaging is employed for selectively recording two-dimensional plots of the individual distributions of the components <i>n</i>-hexane (nC6) and 3-methylpentane (3MP) over a single crystal of zeolite ZSM-5 during mixture adsorption. At a pressure change from 0 to 0.02 mbar, the scenario of “overshooting” is observed, with the concentration of nC6 temporarily exceeding its equilibrium value. After the next pressure step from 0.02 to 2 mbar, 3MP is progressively driven out of the pores, in parallel with an increase in nC6 concentration. The IR microimaging results are corroborated by grand canonical Monte Carlo simulations, which help explain the peculiarities of mass transfer by providing visual representations of the distribution and packing densities of the guest molecules in the pores.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1767-1778"},"PeriodicalIF":1.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707537","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":"Comparison of Various Methods and Detectors to Determine Isotherms Using Self-Packed Columns","authors":"Caroline Heiduk,&nbsp;Xiushi Miao,&nbsp;Prof. Dr.-Ing. Stephan Scholl","doi":"10.1002/cite.202400091","DOIUrl":"https://doi.org/10.1002/cite.202400091","url":null,"abstract":"<p>The study aims to determine adsorption isotherms through dynamic methods, including elution by characteristic point (ECP) and frontal analysis (FA), using a model system of beta zeolite and an aqueous sorbitol solution. The investigation specifically focuses on self-packed fixed-bed columns with a low number of theoretical plates <i>N</i>_t. It details the packing method optimization for these columns and identifies key challenges. Ultraviolet-visible (UV/Vis) and refractive index (RI) detectors, including parameters such as rise time <i>t</i>_rise and wavelength <i>λ</i>, are thoroughly compared in this study. Various models are assessed for their appropriateness in predicting the isotherms. The study's practical implications have the potential to enhance research and industrial applications in the field of adsorption, particularly with regard to the optimization of adsorbent materials and detection methods.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1676-1682"},"PeriodicalIF":1.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707532","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":"Moving Horizon Parameter Estimation for an Enzyme-Catalyzed Transamination Reaction with Integrated Product Removal","authors":"Jessica Behrens,&nbsp;Sven Tiedemann,&nbsp;Tom Kunde,&nbsp;Prof. Dr. Jan von Langermann,&nbsp;Prof. Dr.-Ing. Achim Kienle","doi":"10.1002/cite.202400106","DOIUrl":"https://doi.org/10.1002/cite.202400106","url":null,"abstract":"<p>Chiral amines are key building blocks in producing active pharmaceutical ingredients and can be synthesized via the amine transaminase pathway under mild conditions with eco-friendly solvents. For model-based design and control, mathematical models can be utilized. This requires reliable parameterization of the model. In this study, a model for the production of (<i>S</i>)-(3 methoxyphenyl)-ethylamine is presented. Parameter identifiability is analyzed using the method of profile likelihoods. The parameter identifiability is then tested in two different batch operation scenarios by using moving horizon estimation, which can be applied for on-line model adaption and control purposes. In a batch process, identifiability decreases over time. A repetitive batch strategy improves parameter identifiability.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1751-1766"},"PeriodicalIF":1.5,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142708427","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":"Modeling an Industrial Hydrochlorination of Glycerol – A Systematic Study of Basic Reactor Types","authors":"Philipp Adrian Baum,&nbsp;Dr. Martin Gerlach,&nbsp;Prof. Christof Hamel","doi":"10.1002/cite.202400111","DOIUrl":"https://doi.org/10.1002/cite.202400111","url":null,"abstract":"<p>Modeling and optimization of real chemical reactors is challenging. A program to systematically compare the performance of an existing reactor with basic reactor models was built. The program was tested on the hydrochlorination of bio-based glycerol in a bubble column. The model-based approach provided insights into the reactor's concentration profiles, mass transfer, and mixing. In this case study, a plug-flow tubular reactor (PFTR) is sufficient as a model for process intensification. Based on the results, a novel reactor design that significantly improves yields was proposed and simulated.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1545-1561"},"PeriodicalIF":1.5,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142708419","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":"Design and Development of Integrated Direct Air Capture and Methanation Processes","authors":"Dr. Francesco Sabatino,&nbsp;Mattia Galanti,&nbsp;Dr. Ivo Roghair,&nbsp;Prof. Dr. Martin Van Sint Annaland","doi":"10.1002/cite.202400076","DOIUrl":"https://doi.org/10.1002/cite.202400076","url":null,"abstract":"<p>The synergies from integrating direct air capture and CO₂ methanation are assessed and quantified. Three direct air capture and methanation processes with different integration strategies are proposed: only heat integration, direct air capture sorbent regeneration with high-pressure H₂, and complete integration in a single unit. The heat integration study via pinch analysis evaluated the potential energy demand reduction. Overall autothermal operation is achievable, as the heat generated in methanation often exceeds that required for direct air capture sorbent regeneration. A novel process combining CO₂ adsorption and methanation in one reactor provided the best productivity and energy demand results. However, this design requires complex cycles and strict demands on the sorbent and catalyst, requiring further development and experimental demonstration.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1585-1594"},"PeriodicalIF":1.5,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142708364","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":"Ein Festival des Netzwerkens","authors":"","doi":"10.1002/cite.202471104","DOIUrl":"https://doi.org/10.1002/cite.202471104","url":null,"abstract":"&lt;p&gt;&lt;b&gt;Wissenschaft und Industrie im Dialog – beim ersten DECHEMA FORUM konnte man das Motto der DECHEMA vor Ort in jeder Hinsicht erleben. Ob zwischen Disziplinen, Organisationen oder Generationen: zwei Tage lang wurde Wissen geteilt, Standpunkte ausgetauscht und Kontakte geknüpft. Dabei lebte das neue Veranstaltungskonzept sowohl von den abwechslungsreichen Formaten als auch von den vielen eingebrachten Perspektiven&lt;/b&gt;.&lt;/p&gt;&lt;p&gt;Mit der Premiere des DECHEMA FORUMs wollte die DECHEMA ein neues Format schaffen, das einerseits den geänderten Ansprüchen von Teilnehmenden in Richtung kürzerer, kompakter Veranstaltungen entgegenkommt, andererseits die Vielfalt der Themen und den Anspruch der DECHEMA, Netzwerke zu knüpfen und gemeinsam neue Ideen zu entwickeln, abbildet. Das ist bei der Auftaktveranstaltung in Friedrichshafen gelungen.&lt;/p&gt;&lt;p&gt;„Nachhaltig produzieren in Chemie, Pharma und Life Sciences“ war die übergreifende Fragestellung, unter der sich vom 11. bis zum 13. September 2024 hochrangige internationale Plenarvorträge, themenfokussierte Vortragssessions und Workshops versammelten.&lt;/p&gt;&lt;p&gt;Allein die Plenarvorträge zeigen schon, wie unterschiedlich Beiträge zur Nachhaltigkeit aussehen können: Ralf Düssel stellte die Sichtweise des Chemiekonzerns Evonik vor; dieser hat sich bereits auf den Weg zu mehr Nachhaltigkeit gemacht und sieht sich der Herausforderung gegenüber, eine langfristige Strategie auch angesichts volatiler Rahmenbedingungen und noch offener technischer Fragestellungen umzusetzen. Kami Krista verwies auf die Potenziale von künstlicher Intelligenz, um nachhaltige Prozessentwicklung anzugehen, auch wenn noch nicht der letzte Datensatz als Entscheidungsgrundlage zur Verfügung steht. Und John Woodley zeigte nicht nur die Hürden bei der Entwicklung der Bioökonomie auf, sondern skizzierte auch Wege zu deren Überwindung – nämlich indem das Design eines Biokatalysators und des entsprechenden Prozesses integriert angegangen werden.&lt;/p&gt;&lt;p&gt;Zu diesen Programmhöhepunkten kamen weitere Plenar- und Tandemvorträge, darunter auch die CIT-Lecture der diesjährigen Preisträgerin Regina Palkovits. Die Teilnehmer der Podiumsdiskussion „Sektorübergreifende Transformation – wer macht den ersten Schritt“ stellten allerdings die guten Ideen und Transformationskonzepte auf den Prüfstein der Machbarkeit. Aus dieser Veranstaltung ging so mancher wohl eher ernüchtert – denn den ersten Schritt müssen wohl alle gleichzeitig machen und sehen sich dabei doch nach eigener Aussage durch bürokratische Hürden, unzuverlässige Rahmenbedingungen und hohe Kosten gehindert. Die Forderungen waren eindeutig: Ein ausgeweiteter „Industrial Green Deal“, weniger und pragmatischere Regulatorik und günstige Energie, besonders in Form von Industriestrompreisen, das wären Faktoren, die aus dem Hürdenlauf ein Mittelstreckenrennen machen könnten.&lt;/p&gt;&lt;p&gt;In den Workshops hatten dann alle Beteiligten die Gelegenheit, aktiv mitzudiskutieren. So vielfältig die Themen und Formate – es ging unt","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 11","pages":"1453"},"PeriodicalIF":1.5,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202471104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524968","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":"Determination of Chain Transfer Constants of Alcohols for High-Pressure Polyethylene Polymerization","authors":"Laura Euler Bueno,&nbsp;Dr. Kristina Maria Zentel,&nbsp;Prof. Dr. Markus Busch","doi":"10.1002/cite.202400095","DOIUrl":"https://doi.org/10.1002/cite.202400095","url":null,"abstract":"<p>In low-density polyethylene (LDPE) production, low-molecular-weight species are used as chain transfer agents (CTAs). They reduce the degree of polymerization, which has an impact on the polymer properties, such as processability. To specifically adjust the product properties, a detailed understanding of the transfer kinetics to CTAs is indispensable. Thus, the transfer activity of various primary, secondary, and tertiary alcohols as well as diols was investigated experimentally between 120 °C and 250 °C at 2000 bar. The results were evaluated using the Mayo and chain length distribution (CLD) method, and the latter was found to give more reliable results. It was observed that the hydroxy group systematically increases transfer activity compared to alkanes. Additionally, a linear increase of transfer activity with the number of hydrogen atoms is found.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1697-1708"},"PeriodicalIF":1.5,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142708044","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. 11/2024","authors":"","doi":"10.1002/cite.202471105","DOIUrl":"https://doi.org/10.1002/cite.202471105","url":null,"abstract":"","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 11","pages":"1523"},"PeriodicalIF":1.5,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202471105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524965","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}