EXTERNAL MASS-TRANSFER COEFFICIENTS FOR MONOLITH CATALYSTS

Monolith catalyst reactors are used for controlling emissions of autom otive and industrial pollutants. Various external mass transfer correl ations are available for small-pitch catalysts typical of automotive a pplications; however, little information is available for catalysts ha ving larger pitch and length that are more typical of power plant appl ications. The present paper proposes a new correlation Sh = 2.696[1 0.139ScRe(d/L)](0.81) based on data for the mass transfer limited perf ormance for the CO oxidation reaction in square-channeled titania-sili ca honeycomb catalysts. The correlation is suitable for describing the performance of square-channeled honeycomb catalysts used for the sele ctive catalytic removal of nitric oxide from power plant effluents. Th e differences between the present correlation and other literature cor relations are discussed.