Search Results - "Freund, Hannsjorg"

Identification of Mass Transfer Limitations by Kinetic Modeling of a Technical-Scale Trickle Bed Reactor for the Hydrogenation of Viscous Aromatics by Held, Hendrik, Freund, Hannsjörg

“…This study aimed at developing a reactor model for elucidating the interplay between mass transfer and reaction kinetics in trickle bed reactors with metal…”
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Kinetic Modeling of the Partial Oxidation of Propylene to Acrolein: A Systematic Procedure for Parameter Estimation Based on Non-isothermal Data by Ganzer, Gunnar, Freund, Hannsjörg

“…On the basis of non-isothermal experiments in an integral pilot-scale reactor, the heterogeneously catalyzed gas phase oxidation of propylene to acrolein was…”
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Assessment of Periodic Open Cellular Structures for Enhanced Heat Conduction in Catalytic Fixed-Bed Reactors by Bianchi, Enrico, Schwieger, Wilhelm, Freund, Hannsjörg

“…In this paper, the effective heat conductivity of periodic open cellular structures (POCS) is investigated by means of a systematic numerical study. 3D…”
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Packed Periodic Open Cellular Structures – an Option for the Intensification of Non-Adiabatic Catalytic Processes by Ambrosetti, Matteo, Groppi, Gianpiero, Schwieger, Wilhelm, Tronconi, Enrico, Freund, Hannsjörg

“…[Display omitted] •Conductive packed POCS proposed as enhanced catalytic reactor solution.•Systematic study of catalyst inventory, pressure drop and heat…”
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An appraisal of the heat transfer properties of metallic open-cell foams for strongly exo-/endo-thermic catalytic processes in tubular reactors by Bianchi, Enrico, Heidig, Tobias, Visconti, Carlo Giorgio, Groppi, Gianpiero, Freund, Hannsjörg, Tronconi, Enrico

“…► Heat transfer characteristics of open-cell metal foams were assessed. ► FeCrAlY and Al foams, 5–11% relative density and 10–40PPI, were tested. ► Conduction…”
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Numerical simulation of heat transfer in the near-wall region of tubular reactors packed with metal open-cell foams by Bianchi, Enrico, Groppi, Gianpiero, Schwieger, Wilhelm, Tronconi, Enrico, Freund, Hannsjörg

“…•Conjugated heat transfer simulations for air or water flow through aluminium open-cell foams.•The role of reactor wall-foam support thermal coupling is…”
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Comparative evaluation of heat transfer correlations with different fluid property considerations for fixed-bed reactor modeling by Pietschak, Alexander, Maußner, Johannes, Dixon, Anthony G., Freund, Hannsjörg

“…•Evaluation of heat transfer correlations based on 90 heat transfer experiments.•Consideration of local fluid properties reduces prediction errors by at least…”
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Simultaneous design of the optimal reaction and process concept for multiphase systems by Hentschel, Benjamin, Peschel, Andreas, Freund, Hannsjörg, Sundmacher, Kai

“…In complex chemical processes optimizing the reactor with respect to a stand-alone reactor performance criterium such as product selectivity does not…”
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Analysis and optimal design of an ethylene oxide reactor by Peschel, Andreas, Karst, Florian, Freund, Hannsjörg, Sundmacher, Kai

“…In this work, a recently proposed multi-level reactor design methodology ( Peschel et al., 2010) is extended and applied for the optimal design of an ethylene…”
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Design of optimal multiphase reactors exemplified on the hydroformylation of long chain alkenes by Peschel, Andreas, Hentschel, Benjamin, Freund, Hannsjörg, Sundmacher, Kai

“…In this work, a methodology for the design of optimal multiphase reactors is proposed and illustrated on the hydroformylation of 1-octene using a biphasic…”
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A New Process for Azeotropic Mixture Separation by Phase Behavior Tuning Using Pressurized Carbon Dioxide by Ye, Kongmeng, Freund, Hannsjörg, Sundmacher, Kai

“…A fundamental approach to separate azeotropic mixtures by tuning the phase behavior using pressurized CO2 as a tunable solvent was studied. Following this new…”
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Model-based prediction of optimal conditions for 1-octene hydroformylation by Hentschel, Benjamin, Peschel, Andreas, Xie, Mingquan, Vogelpohl, Christina, Sadowski, Gabriele, Freund, Hannsjörg, Sundmacher, Kai

“…In reactive multiphase systems, the reactive phase can be manipulated not only by temperature and pressure, but also via coexisting “service” phases. For the…”
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Evaluation of the ionic liquids 1-alkyl-3-methylimidazolium hexafluorophosphate as a solvent for the extraction of benzene from cyclohexane: (Liquid+liquid) equilibria by Zhou, Teng, Wang, Ziyun, Chen, Lifang, Ye, Yinmei, Qi, Zhiwen, Freund, Hannsjörg, Sundmacher, Kai

“…► Measured ternary LLE for {cyclohexane (1)+benzene (2)+[Cnmim][PF6] (3)}. ► Well correlated the LLE data with the NRTL model. ► Determined the benzene…”
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Modelling (vapour + liquid) and (vapour + liquid + liquid) equilibria of {water (H 2O) + methanol (MeOH) + dimethyl ether (DME) + carbon dioxide (CO 2)} quaternary system using the Peng–Robinson EoS with Wong–Sandler mixing rule by Ye, Kongmeng, Freund, Hannsjörg, Sundmacher, Kai

“…► Phase behaviour modelling of H 2O–MeOH–DME under pressurized CO 2 (anti-solvent) using PRWS. ► PRWS–UNIFAC–PSRK has better performance than PRWS–UNIFAC–Lby…”
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Predicting the Specific Surface Area and Pressure Drop of Reticulated Ceramic Foams Used as Catalyst Support by Inayat, Amer, Freund, Hannsjörg, Schwab, Andreas, Zeiser, Thomas, Schwieger, Wilhelm

“…Open‐cell ceramic foams are attractive candidates as catalyst support owing to their remarkable heat and mass transfer characteristics. The accurate knowledge…”
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An Overview of Mutual Solubility of Ionic Liquids and Water Predicted by COSMO-RS by Zhou, Teng, Chen, Long, Ye, Yinmei, Chen, Lifang, Qi, Zhiwen, Freund, Hannsjörg, Sundmacher, Kai

“…To properly screen and use ionic liquids (ILs) as environmental-friendly solvents in chemical reactors and separation processes, the knowledge of their…”
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Multiscale Chemical Process Design Exemplified for a PEM Fuel Cell Process by Karst, Florian, Freund, Hannsjörg, Maestri, Matteo, Sundmacher, Kai

“…To maximize the utilization of limited energy and material resources, a new design methodology for chemical processes is proposed based on a multiscale…”
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Dynamics of liquid–liquid systems based on linear thermodynamics of irreversible processes by Imam, Rayees Ahamed, Freund, Hannsjörg, Sundmacher, Kai

“…The use of non-equilibrium models for integrated processes involving liquid–liquid systems has increased in recent years. These processes often exhibit complex…”
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Dynamic Carbon Dioxide Methanation in a Wall-Cooled Fixed Bed Reactor: Comparative Evaluation of Reactor Models by Fischer, Konrad L, Langer, Moritz R, Freund, Hannsjörg

“…A comprehensive model comparison is presented for the description of the steady state and dynamic behavior of a wall-cooled fixed bed methanation reactor…”
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Methodology for the Design of Optimal Chemical Reactors Based on the Concept of Elementary Process Functions by Peschel, Andreas, Freund, Hannsjörg, Sundmacher, Kai

“…In this contribution, a methodology for the optimal design of chemical reactors based on the best reaction route in the thermodynamic state space is proposed…”
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