High-temperature, short-time sulfation of calcium-based sorbents. 1; Theoretical sulfation model

Journal Article · Wed Oct 31 23:00:00 EST 1990 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00107a003· OSTI ID:5748575

Milne, C R; Silcox, G D; Pershing, D W ^[1]; Kirchgessner, D A ^[2]

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1. Dept. of Chemical Engineering, The Univ. of Utah, Salt Lake City, UT (US)
2. Air and Energy Engineering Research Lab., U.S. Environmental Protection Agency, Research Triangle Park, NC (US)

This paper reports on a mathematical model for the sulfation of CaO developed around the overlapping grain concept. The potential influence of high mass-transfer rates from simultaneous calcination of CaCO{sub 3} or Ca(OH){sub 2} is incorporated in the mass-transfer coefficient for SO{sub 2} diffusion to the particle. A solution scheme for the nonlinear differential equation governing pore diffusion with changing particle structure is developed. The influence of grain overlap on product-layer diffusion is quantified. The model predictions show good agreement with published, fundamental differential reactor data which include the influences of surface area, temperature, and SO{sub 2} partial pressure.

• OSTI ID: 5748575
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 29:11; ISSN IECRE; ISSN 0888-5885
• Country of Publication: United States
• Language: English

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