宁波大学学报：理工版
寧波大學學報：理工版
저파대학학보：리공판
Journal of Ningbo University(Natural Science and Engineering Edition)
2012年
1期
128-132
,共5页
范海燕%孔春龙%夏海平%陈亮
範海燕%孔春龍%夏海平%陳亮
범해연%공춘룡%하해평%진량
离子交换%分子筛%KCaA%CaA%CO2
離子交換%分子篩%KCaA%CaA%CO2
리자교환%분자사%KCaA%CaA%CO2
ion exchange%molecular sieve%KCaA%CaA%CO2
采用离子交换法，在CaA型分子筛中加入氯化钾水溶液，并搅拌一定时间，将功能K＋引入到CaA型分子筛结构中，以调控CaA型分子筛的孔径和增加它的吸附活性位点．考察了离子交换时间和气体吸附压力等条件对制备的KCaA型分子筛的结构、形貌和CO2吸附性能的影响．通过X射线衍射、扫描电子显微镜和CO2吸附等温线等表征手段，结果发现：获得的KCaA型分子筛具有与CaA型分子筛相同的结构与形貌；增大气体吸附压力，分子筛对CO2的吸附量增大；但随着离子交换时间的增长，分子筛对CO2的吸附能力先增大后减小：在室温及1bar气压下对CO2气体的吸附性能比原CaA型分子筛提高了26．7％．
採用離子交換法，在CaA型分子篩中加入氯化鉀水溶液，併攪拌一定時間，將功能K＋引入到CaA型分子篩結構中，以調控CaA型分子篩的孔徑和增加它的吸附活性位點．攷察瞭離子交換時間和氣體吸附壓力等條件對製備的KCaA型分子篩的結構、形貌和CO2吸附性能的影響．通過X射線衍射、掃描電子顯微鏡和CO2吸附等溫線等錶徵手段，結果髮現：穫得的KCaA型分子篩具有與CaA型分子篩相同的結構與形貌；增大氣體吸附壓力，分子篩對CO2的吸附量增大；但隨著離子交換時間的增長，分子篩對CO2的吸附能力先增大後減小：在室溫及1bar氣壓下對CO2氣體的吸附性能比原CaA型分子篩提高瞭26．7％．
채용리자교환법，재CaA형분자사중가입록화갑수용액，병교반일정시간，장공능K＋인입도CaA형분자사결구중，이조공CaA형분자사적공경화증가타적흡부활성위점．고찰료리자교환시간화기체흡부압력등조건대제비적KCaA형분자사적결구、형모화CO2흡부성능적영향．통과X사선연사、소묘전자현미경화CO2흡부등온선등표정수단，결과발현：획득적KCaA형분자사구유여CaA형분자사상동적결구여형모；증대기체흡부압력，분자사대CO2적흡부량증대；단수착리자교환시간적증장，분자사대CO2적흡부능력선증대후감소：재실온급1bar기압하대CO2기체적흡부성능비원CaA형분자사제고료26．7％．
The KCaA molecular sieve is prepared using the ion exchange method in which potassium chloride solution is used with stirring process. K＋ is added to the CaA molecular sieve to regulate its pore size and enhance its CO2 adsorption sites. The ion exchange time and the sorption pressure are investigated in this work. X-ray diffraction, scanning electron microscopy, energy dispersive spectrometer and the pressure composition isotherms technique are used to characterize the molecular sieves. Results indicate that the structure and morphology of the KCaA molecular sieve are the same with that of CaA molecular sieve; CO2 adsorption capacity of KCaA molecular sieves first increases with the increase of the testing pressure, followed by slightly decreasing as the ion exchange time increases; Moreover, CO2 adsorption capacity of the KCaA molecular sieve is found to be apparently higher （26.7%） than that of original CaA molecular sieve under a pressure of I bar.
