This thesis is a report on the construction, calibration and use of the universal B.E.T. apparatus for the determination of the specific surfaces, and the adsorption-desorption isotherms of a vapour phase mercaptan on solid adsorbent systems. Examples are given for the determination of large (to 2000 m2jg) and small (200 cm2/g - 1 m2/g) specific surfaces. A gravimetric McBain-Bakr micro balance is incorporated in the B.E.T. apparatus for the determination of the adsorption isotherms of hexyl mercaptan vapour on synthetic sphalerite, zinc sulphide and zinc oxide. Adsorption isotherms are given for hexyl mercaptan on synthetic sphalerite at 25°C, 0.5°C and 50°C; on zinc sulphide at 25°C and 1.5°C and on zinc oxide at 25°C. All these isotherms are sigmoidal with a definite change in slope at the monolayero The amount of mercaptan adsorbed after the monolayer increases almost linearly with relative pressure to P/P0 = 0.8. Above this value the amount adsorbed increases very rapidly vrith relative pressure. Hysteresis loops appear in the isotherms for all adsorption-desorption cycles. These loops are completely reversible. It is not possible to desorb the mercaptan monolayer from any of the adsorbents even at elevated temperatures.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.118174 |
| Date | January 1965 |
| Creators | Salman, Talat M. |
| Contributors | Robertson, R. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy. (Department of Mining Engineering and Applied Geophysics) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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