CAJ | 학술논문

用不同浓度的NaOH溶液对丝光沸石进行处理制备了具有复合孔道结构的介孔丝光沸石,并采用x射线衍射、扫描电子显微镜、透射电子显微镜和N2吸附.脱附等方法对其进行了表征.结果表明,随着NaOH溶液浓度的升高.介孔丝光沸石的粒径逐渐变小,分子筛表面的介孔逐渐丰富,孔径分布逐渐变宽,介孔体积逐渐增大呈线性关系.当NaOH浓度为0.50 mol/L时,介孔丝光沸石的形貌变为空心沸石微囊或微囊壁.介孔的增加产生扩散效应,适当的NaOH溶液处理有利于提高丝光沸石对C_9和C_(10)芳烃的转化能力.
용불동농도적NaOH용액대사광비석진행처리제비료구유복합공도결구적개공사광비석,병채용x사선연사、소묘전자현미경、투사전자현미경화N2흡부.탈부등방법대기진행료표정.결과표명,수착NaOH용액농도적승고.개공사광비석적립경축점변소,분자사표면적개공축점봉부,공경분포축점변관,개공체적축점증대정선성관계.당NaOH농도위0.50 mol/L시,개공사광비석적형모변위공심비석미낭혹미낭벽.개공적증가산생확산효응,괄당적NaOH용액처리유리우제고사광비석대C_9화C_(10)방경적전화능력.
Mesoporous mordenite samples were prepared by treatment in NaOH solution with different concentrations.The samples were characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy,and N2 adsorption-desorption methods.The NaOH concentration had a great impact on physicochemical properties of the mesoporous mordenite.With the increase in NaOH concentration,the particle size of the mesoporous mordenite became smaller,the amount of derived mesopores increased.the pore size distribu.tion became broader and the volume of mesopores increased in a linear manner.When the NaOH concentration was 0.50 mol/L,the mesoporous mordenite became zeolite microbox-like architecture and its fragments.The mordenite after alkaline treatment had much bener camlytic performance for trailsformation of C_9 and C_(10) aromatics to benzene,toluene,and xylene.