Analysis of chemical methods for determination of interfacial areas in gas-in-liquid dispersions with non-uniform bubble sizes

✍ Scribed by A. Schumpe; W.-D. Deckwer

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 932 KB
• Volume: 35
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(80)85048-2

✦ Synopsis

Abshct

-Compamon of hterature data on effecttve mterfactal areas from sulfite oxldatlon and CO, absorption into aMcab show conslderable dmerences even for the same contactor It IS shown that the discrepancy results from the use of an overall conversion Owmg to the non-linear dependency of the converston of the mterfaclal area and the non-umformdy of the r/db-values of the bubbles thus IS not permltted The deviaUon of &km from (I~ IS larger the broader the dlstnbution of &fb and the htgher the Stanton numbers are The error can however be kept low rf area measurements by chenucal methods are camed out at low conversions, I e the gas-hqtud contactor should possibly be operated as dlfferentml reactor For a dtfference of acbm from +., less than 15% the conversIon m the smallest bubbles having largest ddb-values should not exceed a value of about 0 4-O 8, the appropriafe value depending on the reaction order This presents a rather conservatrve mdehne for efficient expenmentatlon, however, it guarantees neghgtble difference of &he,,, from ta, for most practical applications