中国化学工程学报(英文版)
中國化學工程學報(英文版)
중국화학공정학보(영문판)
CHINESE JOURNAL OF CHEMICAL ENGINEERING
2013年
8期
835-843
,共9页
代成娜%雷志刚%王玉丽%张润铎%陈标华
代成娜%雷誌剛%王玉麗%張潤鐸%陳標華
대성나%뢰지강%왕옥려%장윤탁%진표화
selective catalytic reduction%N2O conversion%momentum transfer%heat transfer%mass transfer%mono-lith catalysts%mathematical modeling
This work tries to identify the relationship between geometric configuration of monolith catalysts, and transfer and reaction performances for selective catalytic reduction of N2O with CO. Monolith catalysts with five different channel shapes (circle, regular triangle, rectangle, square and hexagon), was investigated to make a com-prehensive comparison of their pressure drop, heat transfer Nu number, mass transfer Sh number and N2O conver-sion. It was found that monolith catalysts have a much lower pressure drop than that of traditional packed bed, and for monolith catalysts with different channel shapes, pressure drop decreases in the order of regular triangle>rec-tangle>square>hexagon>circle. The order of Nu is in regular triangle>rectangle≈square>hexagon>circle, similar to that of Sh. N2O conversion follows the order of regular triangle>rectangular≈square≈circle>hexagon. The results indicate that chemical reaction including internal diffusion is the controlling step in the selective cata-lytic reduction of N2O removal with CO. In addition, channel size and gas velocity also have influence on N2O conversion and pressure drop.