Modeling high temperature desulfurization in a fixed-bed reactor

✍ Scribed by Jimmy C.P. Wang; Frank R. Groves; Douglas P. Harrison

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 782 KB
• Volume: 45
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(90)87048-w

✦ Synopsis

time-dependent. isothermal, heterogeneous model has been used to describe the high temperature reaction of H,S with a metal oxide sorbent in a fixed-bed reactor. Plug flow of reacting gas is assumed, and individual pellets react according to the unreacted core model. Five bench-scale desulfurization tests using two sorbent formulations with inlet H,S concentrations ranging from 500 to 14,100 ppmv have been modeled. One parameter, the effective diffusivity within a single pellet, was adjusted to match the experimental HIS breakthrough results. This made possible an independent prediction of the axial sulfur distribution at the conclusion of the test which compared quite well with experimental sulfur analyses. Experimental results from a large-scale reactor were also matched using an effective diffusivity determined from the bench-scale analysis. -WTRODUCTJON