Fixation of lead chloride on kaolinite and bentonite at temperatures between 550 and 950 °C

摘要: Vaporization of lead chloride (PbCl{sub 2}) on sorbents was carried out at linearly rising temperatures in flowing nitrogen with the use a thermogravimetric apparatus. A modeling method has been proposed to depict vaporization rate and calculate fraction fixed during heat-up. The results revealed that dehydrated kaolinite (metakaolinite) had moderate ability fix while fresh showed significantly increased fixation ability. component formed by reaction or could hardly volatilize, even temperature up 1,200 C. Bentonite also effectiveness for capturing chloride. However, least part components products adsorbed bentonite appeared be thermally unstable volatilize gradually prolonged heating time elevated temperatures. It seen dehydroxylation kaolinite, released form hydrochloric acid. Chemically bound water dramatically promote its