Isothermal Reactor for Continuous Flow Microwave-Assisted Chemical Reaction
スポンサーリンク
概要
- 論文の詳細を見る
An isothermal reactor in which reaction solutions can be controlled at constant temperature under constant microwave irradiation was developed. This is useful for investigating microwave effects on chemical reactions that are not observed under conventional heating conditions. We devised a structure in which a heat-transfer medium with a low dielectric loss factor, which hardly absorbs any microwaves, flowed outside a spiral reaction tube and designed the basic structure of the reactor using electromagnetic simulation to optimize the energy absorption rate. The conditions for increasing the temperature controlling ability of the reactor were also investigated theoretically and experimentally by taking into consideration the influences of three elements: the velocity of the internal fluid, the material for the tube, and the velocity of the external fluid. The velocity of the external fluid had the greatest influence on temperature controlling ability and the material for the tube had the least influence under the experimental conditions. The overall heat transfer coefficient was about 3.9×10<SUP>2</SUP> W/(m<SUP>2</SUP>·K) when water flowed through the quartz reaction tube at 7.1 mm/s and the external fluid flowed outside the tube at 44 mm/s. We also tested and confirmed that the temperature of water used as internal fluid could be controlled to within ±1.5 K at 309.3 K when microwaves at 26 W were irradiated into the reactor, whereas the temperature of water was over 373 K and boiled without the heat-transfer medium flowing outside the reaction tube using a conventional method of microwave heating. In addition, we investigated microwave effects on Suzuki-Miyaura coupling reaction using the developed isothermal reactor and we confirmed that the temperatures were controlled well in the reactor. The yields obtained by microwave heating were almost the same as that obtained by oil-bath heating.
著者
-
Hasebe Shinji
Department Of Chemical Engineering Kyoto University
-
Togashi Shigenori
Hitachi Ltd. Mechanical Engineering Research Laboratory
-
Togashi Shigenori
Hitachi Research Laboratory, Hitachi, Ltd.
-
MATSUZAWA Mitsuhiro
Hitachi Research Laboratory, Hitachi, Ltd.
関連論文
- SIMULTANEOUS SEPARATION OF LIGHT AND HEAVY IMPURITIES BY A COMPLEX BATCH DISTILLATION COLUMN
- Product Quality Estimation and Operating Condition Monitoring for Industrial Ethylene Fractionator
- Energy Conservation by Multi-Effect Batch Distillation System
- Improvement of Distillation Composition Control by Using Predictive Inferential Control Technique
- SA-Based Scheduling Algorithm for Increasing Probability of Selecting Promising Schedules
- A FLEXIBLE SIMULATION SYSTEM FOR SCHEDULING WITH VARIOUS CONSTRAINTS
- Basic Examination of a Pilot Plant for Continuous Flow Microwave-Assisted Chemical Reaction Combined with Microreactors
- Multiple Steady-States in a Heat Integrated Distillation Column (HIDiC)
- Influence of a Contact Angle on the Thinning Rate of a Liquid Film on a Rotating Substrate
- Fingering Flow Pattern of a Liquid Film on a Rotating Substrate
- Comparison of Turbulence Models Applied to Backward-Facing Step Flow
- Optimization Aspects for Reactive Batch Distillation
- Dynamics and Control of Heat Integrated Distillation Column (HIDiC)
- Effect of Operation Strategy and Control Structure on Multiple Steady-States of Heat Integrated Distillation Column (HIDiC)
- Isothermal Reactor for Continuous Flow Microwave-Assisted Chemical Reaction
- Investigation of Microwave Effects on Transition Metal Catalyzed Reaction Using an Isothermal Reactor
- Investigation of Microwave Effects on Transition Metal Catalyzed Reaction Using an Isothermal Reactor
- Yield Improvement of Photoreactions with Effective Microreactors Using Black Aluminum Oxide Channel Substrates
- Improvement in the Yield of an Equilibrium Esterification Reaction Using a Microreactor for Water Separation
- Study of energy efficiency of a wetted-wall distillation column with internal heat integration.
- General Reordering Algorithm for Scheduling of Batch Processes
- Analyses of the characteristics of a binary packed distillation column with internal heat integration.
- Evaluation for the Mixing Performance of a Microreactor with Inline Measurement
- Production of Sheet-Like Hydroxyapatite Particles Using a Microreactor