Kenmerken van adembeschermingsmiddelen. Deel 1: Eenvoudige correlatie voor schatting van de gebruiksduur (Characteristics of Means for Respiratory Protection. Part I: Simplified Correlation for Estimation of the Life Time).
PRINS MAURITS LABORATORIUM TNO RIJSWIJK (NETHERLANDS)
Pagination or Media Count:
Aim of this project is to develop a method to determine whether a filter bed of activated carbon can be of use in the protection against components of high volatility under known conditions. In this report the usefulness of a relatively simple method to estimate the lifetime of a filter bed is discussed. Comparison between the calculated and measured so-called 1 breakthrough time showed that this time interval can be calculated with an accuracy of 15. This correlation is valid under conditions typical for filter beds used in practice. In case of very volatile components, however, the error in the calculated value of the breakthrough time can increase strongly. Moreover, the correlation is only valid in case both the activated carbon and the air flowing through the filter bed are dry. However, the number of situations in which the breakthrough time can be calculated accurately is too restricted by these boundary conditions. A modification of the correlation presented in this report is possible, but does not show much perspective. Therefore in the continuation of the project a different approach will be applied, based on an advanced adsorption process simulation model, which is currently being developed at TNO-PML.
- Inorganic Chemistry
- Pumps, Filters, Pipes, Tubing, Fittings and Valves