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생물화공 , 에너지 / 환경 : 고령토에 의한 증기상 중금속의 고온 제거에 관한 연구 - 납 흡착 반응 특성
윤종성(Jong Sung Yun),양희철(Hee Chul Yang),강문자(Mun Ja Kang),김준형(Joon Hyung Kim),강용(Yong Kang) 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.4
This study investigated the kinetics of the sorption reaction for gaseous lead capture in the packed bed of calcined kaolin at 973-1,173 K. The effects of bed temperature and gaseous reactant concentration on the sorption reaction rate were observed by the analysis of experimental data with a developed kinetic model. Detailed information on the lead-sorbent reaction were obtained by the XRD(X-ray diffraction) pattern analysis and the microscopic analysis of pre- and post-sorption sorbent samples. The reaction between metakaolinite, which is the calcination product of kaolin minerals, and the gas-phase lead generated stable metal-mineral complexes(PbAl₂Si₂O_8). An increase in bed temperature resulted in an increase of capturing rate, but it had no effect on maximum uptake. The order of sorption reaction with respect to the lead concentration, m, was determined to be 1.67. The activation energy, E_a was estimated as 10.16 ㎉/㏖, according to the Arrhenius relationship.