期刊
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
卷 84, 期 -, 页码 14-23出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cep.2014.02.007
关键词
Process intensification; Microstructured reactor; Multi-injection infrared thermography; Exothermic reaction; Cyclization of pseudoionone
资金
- 7th European Framework Program COPIRIDE Project [CP-IP 228853-2]
- Swiss National Science Foundation
Microstructured reactors (MSR) with characteristic dimensions below 100 mu m are warranted to maintain close to isothermal conditions when carrying out quasi-instantaneous highly exothermic reactions. Unfortunately, such small dimensions increase the risk of clogging, create high pressure drop and are costly to number-up. The multi-injection (MI) MSR, where one of the reactants is added stepwise along the reactor length, allows working with larger dimensions (diameter >500 mu m) while maintaining good temperature control. Herein presented MI-MSR is made of low temperature co-fired ceramics (LTCC) with herringbone mixing structure inside the reactor channels and is shown to mix efficiently in a large range of Reynolds numbers Re = 20-130. The cyclization of pseudoionone is studied as a model of a highly exothermic fast reaction. The temperature profiles are characterized by a quantitative infrared thermography. The developed LTCC MI-MSR allows similar to 8-fold reduction of hot spot temperature as compared to the adiabatic temperature rise. Moreover, similar to 500-fold intensification is achieved as compared to the conventional semi-batch process with reduced solvent mass by a factor of 2 while attaining a yield of target product above 98%. (C) 2014 Elsevier B.V. All rights reserved.
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