000084427 001__ 84427
000084427 005__ 20180317095243.0
000084427 0247_ $$2doi$$a10.1205/026387603322302896
000084427 02470 $$2DAR$$a4156
000084427 02470 $$2ISI$$a000185167200004
000084427 037__ $$aARTICLE
000084427 245__ $$aDehydrogenation of methanol to anhydrous formaldehyde in a microstructured reactor system
000084427 260__ $$c2003
000084427 269__ $$a2003
000084427 336__ $$aJournal Articles
000084427 500__ $$aCAN 140:199787 35-2 Chemistry of Synthetic High Polymers Laboratory of Chemical Reaction Engineering,Swiss Federal Institute of Technology (EPFL),Lausanne,Switz. Journal 0263-8762 written in English. 7440-23-5 (Sodium) Role: CAT (Catalyst use), USES (Uses) (catalyst; dehydrogenation of methanol to anhyd. formaldehyde in microstructured reactor system); 50-00-0P (Formaldehyde) Role: IMF (Industrial manufacture), PREP (Preparation) (dehydrogenation of methanol to anhyd. formaldehyde in microstructured reactor system); 67-56-1 (Methanol) Role: RCT (Reactant), RACT (Reactant or reagent) (dehydrogenation of methanol to anhyd. formaldehyde in microstructured reactor system)
000084427 520__ $$aAn integrated microreactor system for the direct dehydrogenation of methanol to water-free formaldehyde was developed. The endothermic reaction can be homogeneously catalyzed with evapd. sodium. At reaction temps. of up to 1100 K nearly complete conversion of methanol can be achieved. Undesired consecutive reactions can be minimized, if the reaction products are rapidly cooled and if the residence time at reaction temp. is precisely controlled. Fast heating and cooling of the gases in the order of a few milliseconds is desired, specifications that can be met by microreactors. Several tests were carried out using conventional and microscaled systems. The results are compared and served as a base for the development of an integrated microsystem for the dehydrogenation of methanol. First, two different kind of mixers were tested. The results clearly showed that fast and homogeneous mixing of the gaseous sodium catalyst and the methanol is indispensable. Second, in order to improve the temp. profile in the reactor a cross flow micro heat exchanger was employed. A special adaptor with internal heater was developed, allowing to keep the gases at reaction temp. close up to the micro heat exchanger. The final setup allowed to obtain a formaldehyde selectivity of 80.3% at methanol conversion higher than 97%. [on SciFinder (R)]
000084427 6531_ $$aDehydrogenation; Dehydrogenation catalysts (dehydrogenation of methanol to anhyd. formaldehyde in microstructured reactor system); Heat exchangers (micro; dehydrogenation of methanol to anhyd. formaldehyde in microstructured reactor system)
000084427 6531_ $$amethanol dehydrogenation anhyd formaldehyde micro heat exchanger
000084427 700__ $$0241720$$aMaurer, R.$$g113155
000084427 700__ $$0240078$$aRenken, A.$$g106205
000084427 773__ $$j81$$kA7$$q730-734$$tChemical Engineering Research and Design
000084427 909CO $$ooai:infoscience.tind.io:84427$$particle
000084427 909C0 $$0252033$$pLGRC$$xU10178
000084427 937__ $$aLGRC-ARTICLE-2003-004
000084427 970__ $$a222/LGRC
000084427 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000084427 980__ $$aARTICLE