ブラウンミラライト型構造をもつカルシウムフェライトによるVOC_s触媒分解と塩素分固定化 [in Japanese] Catalytic Decomposition of VOC_s and Chlorine Fixation on Calcium Ferrites with Brownmillerite Type Structure [in Japanese]
Access this Article
Search this Article
Calcium ferrite compounds were synthesized by solid state reaction of fine particle mixtures of Ca (OH) <SUB>2</SUB> and Fe<SUB>2</SUB>0<SUB>3</SUB> (Ca/Fe=0.33-3.00) in order to investigate their catalytic performances for VOC<SUB>S</SUB> decomposition. The influence of Ca/Fe ratio was studied in order to find which crystal phase of calcium ferrite produced the best catalytic performance. The brownmillerite type calcium ferrites (Ca<SUB>2</SUB> Fe<SUB>2</SUB> O<SUB>5</SUB>, Ca/Fe=1.00) showed higher reduction ability of Fe cations than those of other calcium ferrite phases, resulting the highest catalytic activity at low temperatures above 200°C. The brownmillerite type calcium ferrite also showed a high performance for the decomposition of nonchlorine VOC such as propylene, benzene and toluene, but a significant decrease of the catalytic activity was found in the decomposition of chlorobenzene due to the reaction between chlorine and calcium ferrite. Moreover the fixation behavior of chlorine contents onto the calcium ferrite was also investigated in order to clarify the chlorination reactivity of the catalyst. The calcium ferrite catalyst was found to be a good sorbent for fixing chlorine content during the catalytic decomposition of chlorobenzene at 700°C.
- Inorganic Materials
Inorganic Materials 14(327), 83-91, 2007-03-01
The Society of Inorganic Materials, Japan