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Keywords:

  • air quality;
  • sorption;
  • hydrogen sulfide;
  • zinc oxide;
  • sorption kinetics;
  • mass transport;
  • hydrocarbon fuels;
  • Claus process;
  • gas-to-liquids

Abstract

A zinc oxide-based sorbent was prepared by spraying drying a slurry containing 65% zinc oxide, 18% peptized alumina, and 17% perlite. The spray dried solids were dry sieved, wet sieved, dried at 150°C for 1 h, and subsequently calcined at 635°C for 1 h to produce the sorbent. The rate of sorption of hydrogen sulfide was measured as a function of time with a Cahn VersaTherm™ thermogravimetric analyzer. Sorption rate is reported as a function of hydrogen sulfide partial pressure, temperature, and external particle size. Sorption rate can be described by a hydrogen sulfide mass-transport model for agglomerated particles. This agglomerate kinetics model satisfactory explains rate phenomena observed in this system. © 2010 American Institute of Chemical Engineers Environ Prog, 2011