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

Technical Report · Sun Dec 31 23:00:00 EST 1989

OSTI ID:6087415

Milne, C R; Silcox, G D; Pershing, D W; Kirchgessner, D A

The paper discusses 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)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.

• Research Organization: Utah Univ., Salt Lake City, UT (USA). Dept. of Chemical Engineering
• OSTI ID: 6087415
• Report Number(s): PB-91-146688/XAB; CNN: EPA-R811001
• Country of Publication: United States
• Language: English

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