Prospectus

Return to Table of Contents Volunteer to help write Position Paper

PPP-2 Mass Transfer Efficiency – Steam Stripping of Toluene from Water Expected Benefit toMembers: Improved capability to design steam strippers using contactors other than sieve trays, will allow designers to choose the most cost-effective device for steam stripping waste water. Present Situation and Proposed Research: In 1988, FRI measured the efficiency of a sieve tray column in steam stripping toluene from water. The measured tray efficiencies were significantly different from those predicted by existing models, both FRI and the open literature. The data have been useful, not only in designing new strippers, but also in advising the EPA regarding the potential costs of mandated cleanup activities. For various reasons, a plant may prefer to use a different method of vapor-liquid contacting than sieve trays. Based on the experience with sieve trays, it seems likely that predictive efficiency models for other devices are unsatisfactory in this service. The test procedure used for sieve trays will be repeated for each tested contacting device. Proposed Internals and Test System: Traditional Research Idea

A random packing. Estimated Unit Time: Three weeks. Estimated Additional Costs (Beyond Unit Time): Unknown. Background and Discussion:

The data obtained in 1988 with sieve trays has been very beneficial. To collect it, a number of new techniques were learned and/or developed. That knowledge will be useful in implementing this proposal.

PROSPECTUS

Page | 77