A review on the catalytic degassing processes of molten sulfur

Document Type : Review Paper

Authors
Faezeh tari 1
Marzieh Shekarriz 1
Saeed Zarrin Pashneh 2
Ahmad Ruzbehani 2
1 Chemical, Polymeric and Petrochemical Technology Research Division, Faculty of Research and Development in Downstream Petroleum Industry, Research Institute of Petroleum Industry (RIPI), P.O. Box 1485733111, Tehran, Iran
2 Gas Technology Research Division, Research Institute of Petroleum Industry (RIPI), P.O. Box 146651998, Tehran, Iran
Abstract
Processing the sour gas is one of the main methods for production of sulfur in the country and worldwide. In this way, during the sweetening process, sour gases such as hydrogen sulfide are separated from the gas flow and processes in different units. Claus unit is one of these main sections. The output product of this unit is not pure and requires further degassing before introducing to the market. The degassing methods are generally taken in catalytic and non-catalytic approaches. In this paper, different degassing techniques have been described in addition to investigating the advantages of catalytic methods and the optimum method is finally introduced. 

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Subjects

  1. - Baker, D.C. Catalytic sulfur degassing.1988. US Patent 4755372.
  2. Diwakar, G. 2010. A reactor, a structures packing and a method for improving oxidation of hydrogen sulfide or poly sulfides in liquid sulfur, US Patent 692987.
  3. Estep, J.W. and E.W Plum,. 1974. Apparatus for reducing the hydrogen sulfide and hydrogen polysulfide content of liquid sulfur. US Patent 3807141.
  4. Gandhi, S., W. Chung. and, K. Nangi,. 2010. Designing for sulphur removal and storage: part II. Fluor            Corporation, PTQ Q3.
  5. Ledford, T.H. Degassing molten sulfur.1983. US Patent 4423025.
  6. Lagas, J.A., J. Borsboom, and M. Wetzels. 2000. Methods and apparatus for degassing sulfur. US Patent 6149887.
  7. Lagas, J.A., J. Borsboom and M. Wetzels. 2000. Methods and apparatus for degassing sulfur. US Patent 6149887.
  8. Nasato, E. 1997. Process for the high pressure degassing of hydrogen sulfide from liquid sulfur, US Patent 5632967.
  9. Parekh, U.N., S.N., Fenderson, G. Diwakar and G. Nasato, 2012. Reactor, a retained catalyst structure and a method for improving decomposition of poly sulfides and removal of hydrogen sulfide in liquid sulfur. US Patent 0148479A1.
  10. Tonjes, M.R., D.K. Stevens, L.D. Dreitzler, and A.D. Mosher. 2011. Method and apparatus for degasification of Claus-derived sulfur. US Patent 8084013B2.
  11. Yiming, J. 2011. Liquid degassing using fine droplets and micro bubbles. A thesis for Master of Science. University of Alberta.

  • Receive Date 23 April 2022