Dme Direct Synthesis From Syngas in a Large-Scale Three-Phase Slurry Bubble Column Reactor: Transient Modeling

Abstract

In this research, a new transient mathematical model based upon tanks-in-series configuration was developed to simulate the direct synthesis of dimethyl ether (DME) from syngas in a commercial-scale slurry bubble column reactor. A comparison between the simulation results and experimental data showed that the applied model might acceptably describe the behavior of the slurry reactor. Furthermore, simulation results in the heterogeneous bubble flow regime indicated that the proposed model with 10 tanks-in-series provided the optimum condition. Utilizing this transient model and considering catalyst deactivation, the effect of operating conditions on DME productivity and CO conversion were investigated. In addition, the dynamic behavior of the reactor was studied after implementing a step change in the reactor's coolant fluid temperature.

Simulation and Optimization of Industrial Reactors for Dehydrogenation of Heavy Paraffins with Different Carbon Numbers

“…The deactivation model of the catalyst is important for the simulation of an industrial dehydrogenation reactor of heavy paraffins, because the catalyst activity decreases due to the coke deposition on the catalyst. The model of catalyst deactivation in the reported literature, , considering the effect of the reactant composition and water on deactivation, is a good reference for the reaction system of heavy paraffin dehydrogenation, though their process is different from that of mono-olefin production.…”

Modeling and Optimization of Mass and Heat Flux Profiles in a Multifunctional Reactor for CO2 and H2 Valorization to Dimethyl Ether

“…Due to several limitations encountered in the DME direct synthesis, process optimization must be taken into account increasingly for the design of new configurations. Various optimization works have been reported in the literature. − Briefly, whether for direct or indirect DME synthesis, different configurations have been proposed, namely, fixed bed reactor, thermally coupled, and dual type reactor, two-stage spherical packed-bed reactor, temperature gradient reactor, slurry reactor, fluidized bed reactor, multifunctional auto-thermal reactor, and multifunctional reactor assisted by regenerative adsorbents. − Several parameters have been optimized during these works: feed ratios, process inlet temperature, temperature profile, and so forth. Based on these studies on conventional or novel configurations, the development of new optimal configurations for the DME direct synthesis, more specifically from CO 2 , is required.…”

Continuous Hydrogenation: Triphasic System Optimization at Kilo Lab Scale Using a Slurry Solution

“…After selecting a benchmark substrate such as ethyl cinnamate, the strategy was to transpose and scale-up the system, identify key parameters and study them using statistical data analysis. Modelling has already been used in similar research cases (Papari et al, 2012;Papari et al, 2014;Darvishi et al, 2016).…”