Williams, K., Berkebile, R., McLennan, J.,
K., and Svec, P., The NIST Report for the MSU EPICenter, September
National Institute of Standards and Technology, Washington, DC.
Figure 1. The project site: the MSU Safety and Risk Management Building
Fan which directs fume hood exhaust downward into
the adsorber and upward to a location
above the roof.
Figure 3. The fume hood adsorber shown detached from ducts. Dimensions of the adsorber are approximately 1 x 1 x 1 m.
Figure 4. Chemical being injected into the fume hood at a controlled rate.
Figure 5. Chemical container shown within the fume hood.
Figure 6. Multiple containers for high rate injection of chemical into the fume hood.
Figure 7. One of the analyzers used to measure the concentration of chemical flowing into or out of the adsorber.
Figure 8. The adsorber with the top removed and adsorbent removed. It is a radial flow unit which contains separately two types of adsorbents.
Figure 9. Close-up of the radial chambers that contain the adsorbents.
Figure 10. The adsorbent regenerator. In operation, the adsorbent flows vertically downward through the black tube shown near the center of the image. Basically, the absorbents are heated by microwaves to drive off the adsorbed chemical which is transferred to nitrogen purge gas. The purge gas is then further treated before being allowed to enter the atmosphere.
regeneration, the adsorbent
is transferred to a container and weighed. In normal use, the adsorbent
directly back into the adsorber.
Figure 12. Nitrogen was used as a purge gas for the regeneration process.