Evaluation of required activity of SO decomposition catalyst for iodine-sulfur process

Imai, Yoshiyuki  ; Kubo, Shinji  ; Goto, Minoru  ; Shimakawa, Satoshi; Tachibana, Yukio ; Onuki, Kaoru

Required performance of SO decomposition catalyst for Iodine-Sulfur process was investigated. Heat transfer area needed for shell and tube type SO decomposer exchanging heat from VHTR was calculated by applying Yagi-Kunii and Zukauskas's equation for filled layer-SiC tube and SiC tube-He gas flow heat transfer respectively and the minimum space velocity for catalyst was 1000 h. To transform minimum space velocity to more universal kinetic rate constant, we introduced forward/reverse SO decomposition equation. To achieve equilibrium SO decomposition ratio above 0.5 MPa, rate constant k should be more than 1.5 s for SO decomposition catalyst.