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Microreactor System (microreactor + system)
Selected AbstractsAn Integrated Microreactor System for Self-Optimization of a Heck Reaction: From Micro- to Mesoscale Flow Systems,ANGEWANDTE CHEMIE, Issue 39 2010Jonathan P. McMullen Aufbauen, anschalten, fertig: Die Kombination einer Rückkopplungssteuerung mit Durchflussoperationen in Mikroreaktoren (siehe Bild) ermöglicht eine vollautomatische Online-Reaktionsoptimierung. An einer Heck-Reaktion wird das Potenzial für eine schnelle Vielvariablen-Optimierung demonstriert, die mit minimalen Materialmengen auskommt. Die optimalen Bedingungen lassen sich schnell in einen 50-mal größeren Maßstab übertragen. [source] An Investigation into the Transient Behavior of a Microreactor System for Reforming of Diesel Fuel in the kW RangeCHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 11 2009M. O'Connell Abstract A diesel reformer based on microreaction technology was developed for application in an auxiliary power unit (APU) system. The transient characteristics of this reactor for reforming of diesel fuel are reported. Diesel steam reforming was performed at various S/C ratios with load changes ranging from 30 % LL to 80 % LL, i.e., a 1.5 kW to a 4 kW electrical equivalent. The reactor itself was based on an integrated reformer/burner heat exchange reactor concept. The reforming was performed at temperatures above 750,°C and at various S/C ratios, down to a minimum of 3.17. Variation of experimental parameters, such as O/C and S/C ratios, are critical for optimum and efficient operation of the reformer. [source] Toward a Microfluidic-Based Rapid Amylase Assay SystemJOURNAL OF FOOD SCIENCE, Issue 6 2009Richard J. Holmes ABSTRACT:, This article describes work into a prototype system for the assay of amylase, using microfludic technologies. The new system has a significantly shorter cycle time than the current laboratory methods, which generally use microtitre plates, yet is capable of generating significantly superior results. As such, we have shown that sensitivity is enhanced by a factor of 10 in the standard assay trials, and by a factor of 2 in the real-sample lab trials. In both assays, the use of a microreactor system reduced the reaction time by a factor of 6.2, from 20 min incubation to 3.2 min. Basing the conclusion on the Megazyme Cerealpha Standard Method, and using the Cerealpha units as a measure of assay efficiency, the typical response for the microfluidic assay was shown to be 1.0 × 10,3 CU/mL (standard deviation [SD] 2.5 × 10,4 CU/mL), compared to 2.56 × 10,4 CU/mL (SD 5.94 × 10,5 CU/mL) for the standard macroassay. It is believed that this improvement in the reaction schematics is due to the inherent advantages of microfluidic devices such as superior mixing, higher thermal efficiency, and enhanced reaction kinetics. [source] Experimental Investigation and Modeling Approach of the Phenylacetonitrile Alkylation Process in a MicroreactorCHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 6 2009E. S. Borovinskaya Abstract The application of microreaction technology has the potential to intensify chemical processes. It is therefore of great interest to investigate the operating efficiency of a multiphase process such as the alkylation of phenylacetonitrile in a microreactor and to compare the performance to a batch reactor. The undeniable advantages of continuous microreactor systems for this process were demonstrated. Furthermore, the influence of the organic to aqueous phase ratio in the microreactor was investigated. A model of the reaction course was formulated based on experimental data. This model was used in the analysis and modeling of the alkylation process in a microreactor and found to be adequate. The optimal microreactor performance conditions were determined using the numerical optimization technique (Harrington's desirability function) and confirmed by experiments. [source] | ||||||||||