REMOVAL OF THE CORROSIVE HYDROGEN SULFIDE POLLUTANT FROM THE INTAKE AIR FOR A CONTROLLED ENVIRONMENT.

Chieh Mei Hsiao, Daw Ming Fann, A. S.T. Chiang, Yiang I

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The contact point corrosion of the telephone switching equipment in a spa area was investigated. It has been found that the observed corrosion is mainly due to the high H//2S concentration ( less than 90 ppb) in the local atmosphere. Since the switching office is in an air conditioned enclosure, removal of H//2S from the intake air was considered as an effective method to eliminate such corrosion. An adsorbent made of zinc oxide and clay was selected for removal of H//2S. Cylindrical pellets of this adsorbent were prepared by extrusion of the mixed-mud, and then by 800 degree C calcination. The adsorption capacity and kinetics of trace H//2S in a constant volume system were studied and analyzed with a shrinking core model. The SEM-EDS analysis on the cross sections of the pellets confirms the layer progression of the reacted front. It was found that the adsorption capacity is 2. 74 mg/g and the effective diffusivity of the pores is 0. 03 cm**2/sec.

Original languageEnglish
Title of host publicationKey Eng Mat
Pagespt 1, p 95-99
Editionpt 1-4
StatePublished - 1987

Publication series

NameKey Eng Mat
Numberpt 1-4
Volume20-28

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