M.Sc. Björn Robeck, M.Sc. Katharina Hoff, Dr. Helena Horn
{"title":"Towards Sustainable Battery Recycling: Selective Desorption of Nickel(II) and Cobalt(II) from Amino-Polycarboxylate Derivate Ligands in Model Systems","authors":"M.Sc. Björn Robeck, M.Sc. Katharina Hoff, Dr. Helena Horn","doi":"10.1002/cite.202400041","DOIUrl":"https://doi.org/10.1002/cite.202400041","url":null,"abstract":"<p>Inter alia due to the high demand for lithium-ion batteries, the required critical heavy metals have become a scarce resource. Consequently, effective recycling processes that enable the recovery of such materials are of high interest. A silica adsorbent functionalized with amino-polycarboxylate derivate ligands (HSU331) was applied in order to selectively adsorb nickel(II) and cobalt(II). Subsequently, suitable parameters for a pH-swing desorption were investigated. Maximum desorption efficiencies for Co(II) were achieved at pH = 2.7 (72 %) and for Ni(II) at pH = −0.5 (94 %). These results were used for the design of a pH-shift desorption process in order to selectively recover Co(II) and regenerate the adsorbent after simultaneous adsorption of Co(II) and Ni(II).</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"97 3","pages":"156-163"},"PeriodicalIF":1.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564766","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}
Alexander Geschke, Dr.-Ing. Ronny Tobias Zimmermann, Prof. Dr.-Ing. Jens Bremer, Prof. Dr.-Ing. Kai Sundmacher
{"title":"Core-Shell Catalyst Pellets for CO2 Methanation in a Pilot-Scale Fixed-Bed Reactor","authors":"Alexander Geschke, Dr.-Ing. Ronny Tobias Zimmermann, Prof. Dr.-Ing. Jens Bremer, Prof. Dr.-Ing. Kai Sundmacher","doi":"10.1002/cite.202400098","DOIUrl":"https://doi.org/10.1002/cite.202400098","url":null,"abstract":"<p>Power-to-methane (PtM) offers an efficient opportunity for surplus renewable energy storage, but heat management is a major challenge for conducting the highly exothermic methanation reaction. To address this challenge, this study presents the first successful demonstration of core-shell catalyst pellets in a pilot-scale reactor for CO<sub>2</sub> methanation. Experiments in a wall-cooled fixed-bed reactor are conducted with diluted and undiluted reactant feed under systematic variation of cooling temperature and inlet gas flow rate. The results show that core-shell catalyst pellets significantly reduce the hot-spot temperature while maintaining comparable reactant conversions to uncoated catalyst pellets at the same conditions. Additionally, core-shell catalyst pellets allow for undiluted reactant feed at comparably low hot-spot temperatures (approx. 600 °C).</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1718-1725"},"PeriodicalIF":1.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707541","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}
Chunhong Wei, Benedict N. Leidecker, Dr. Dilver Peña Fuentes, Dr. Henning Schröder, Dr. Mathias Sawall, Prof. Klaus Neymeyr, Prof. Evgenii V. Kondratenko, Prof. Armin Börner, Prof. Robert Franke, Dr. Christoph Kubis
{"title":"Impact of the P-Ligand Concentration on the Formation of Hydroformylation Catalysts: An in situ FTIR Spectroscopic Study","authors":"Chunhong Wei, Benedict N. Leidecker, Dr. Dilver Peña Fuentes, Dr. Henning Schröder, Dr. Mathias Sawall, Prof. Klaus Neymeyr, Prof. Evgenii V. Kondratenko, Prof. Armin Börner, Prof. Robert Franke, Dr. Christoph Kubis","doi":"10.1002/cite.202400088","DOIUrl":"https://doi.org/10.1002/cite.202400088","url":null,"abstract":"<p>The formation of hydrido rhodium(I) complexes of the type [HRh(CO)<sub>3</sub>L] and [HRh(CO)<sub>2</sub>L<sub>2</sub>] from [Rh(acac)(CO)<sub>2</sub>]/L (L: bulky monophosphite ligand) requires a ligand-to-rhodium ratio [L]/[Rh] > 10 to prevent the possible partial generation of [Rh<sub>6</sub>(CO)<sub>16</sub>] under typical hydroformylation conditions. Significant fractions of formed [Rh<sub>6</sub>(CO)<sub>16</sub>] at lower ratios of [L]/[Rh] can be reactivated towards the hydrido complexes after the addition of the monophosphite ligand in the presence of synthesis gas. It was also found that [Rh<sub>6</sub>(CO)<sub>16</sub>] can be transformed by treatment with an excess of monophosphite ligand under inert gas to form a mononuclear complex of the type [L`Rh(CO)L] with an <i>ortho</i>-metallated ligand.</p>","PeriodicalId":9912,"journal":{"name":"Chemie Ingenieur Technik","volume":"96 12","pages":"1657-1667"},"PeriodicalIF":1.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cite.202400088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707569","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":"Influencing Factors on the Wet Impregnation of Additive-Manufactured Catalyst Support Structures","authors":"Sebastian Wilmes, 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}
Axel Schultheis, Dr. Vico Tenberg, Prof. Liisa Rihko-Struckmann, Prof. Kai Sundmacher, apl. Prof. Heike Lorenz
{"title":"Crystallization-Based Separation of ε-Caprolactam from a Depolymerization Reaction Mixture – Fundamentals and Potential Separation Strategies","authors":"Axel Schultheis, Dr. Vico Tenberg, Prof. Liisa Rihko-Struckmann, Prof. Kai Sundmacher, 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}
Patricia Seidel, Dr. Seungtaik Hwang, Aastha Kasera, Dr. Michael Goepel, Dr. Christian Chmelik, Prof. Dr. Randall Q. Snurr, Prof. Dr. Jörg Kärger, Prof. Dr. Roger Gläser
{"title":"Monitoring Transient Sorption of Hexane Isomer Mixtures in a Large ZSM-5 Single Crystal via Infrared Microimaging","authors":"Patricia Seidel, Dr. Seungtaik Hwang, Aastha Kasera, Dr. Michael Goepel, Dr. Christian Chmelik, Prof. Dr. Randall Q. Snurr, Prof. Dr. Jörg Kärger, 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}
Caroline Heiduk, Xiushi Miao, Prof. Dr.-Ing. Stephan Scholl
{"title":"Comparison of Various Methods and Detectors to Determine Isotherms Using Self-Packed Columns","authors":"Caroline Heiduk, Xiushi Miao, 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><sub>t</sub>. 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><sub>rise</sub> 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}
Jessica Behrens, Sven Tiedemann, Tom Kunde, Prof. Dr. Jan von Langermann, Prof. Dr.-Ing. Achim Kienle
{"title":"Moving Horizon Parameter Estimation for an Enzyme-Catalyzed Transamination Reaction with Integrated Product Removal","authors":"Jessica Behrens, Sven Tiedemann, Tom Kunde, Prof. Dr. Jan von Langermann, 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}
Philipp Adrian Baum, Dr. Martin Gerlach, Prof. Christof Hamel
{"title":"Modeling an Industrial Hydrochlorination of Glycerol – A Systematic Study of Basic Reactor Types","authors":"Philipp Adrian Baum, Dr. Martin Gerlach, 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}
Dr. Francesco Sabatino, Mattia Galanti, Dr. Ivo Roghair, Prof. Dr. Martin Van Sint Annaland
{"title":"Design and Development of Integrated Direct Air Capture and Methanation Processes","authors":"Dr. Francesco Sabatino, Mattia Galanti, Dr. Ivo Roghair, 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 CO<sub>2</sub> 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 H<sub>2</sub>, 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 CO<sub>2</sub> 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}