Features International Sugar Journal
The Blackboard

Non – condensable gases [Full subscriber]

Although non-condensable gases (NCG) have important practical effects on heat transfer, this topic is not popular in classical sugar technology texts. Spencer and Meade (1948) and van der Poel et al. (1998) devote a few short paragraphs/pages to it. In engineering books however it is well dealt with: more than 20 pages in Rein (2007) and also in Hugot (1950). Perry et al. (1997), in a general introduction, state that NCG may be present in vapour as a result of leakage, air dissolved in the feed, or decomposition reactions in the feed. When the vapour is condensed in the succeeding…

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