CAJ | 학술논문

采用 Na2CO3水溶液处理法制备了多级孔 ZSM-5分子筛，采用 BET、NH3-TPD、SEM、XRD 等手段进行了表征，研究了碱处理前后 ZSM-5分子筛孔结构、表面酸性、形貌和晶相的变化。采用浸渍法制备了碱处理ZSM-5分子筛负载金属镓的 Ga/ZSM-5催化剂。结果表明，碱处理后 ZSM-5分子筛形成了较多介孔，ZSM-5分子筛的比表面积、孔容和孔径均有增加。比表面积由338 m2/g 增大到364 m2/g,平均孔径由处理前的1.92 nm 增大到37.94 nm。碱处理后 ZSM-5分子筛的形貌和晶相变化不大，酸强度与酸量有所下降。在固定床反应器中进行了乙醇芳构化性能评价。在400℃、0.5 MPa、1.0 h-1的条件下，乙醇转化率接近100%，芳烃收率达到74.25%。
채용 Na2CO3수용액처리법제비료다급공 ZSM-5분자사，채용 BET、NH3-TPD、SEM、XRD 등수단진행료표정，연구료감처리전후 ZSM-5분자사공결구、표면산성、형모화정상적변화。채용침지법제비료감처리ZSM-5분자사부재금속가적 Ga/ZSM-5최화제。결과표명，감처리후 ZSM-5분자사형성료교다개공，ZSM-5분자사적비표면적、공용화공경균유증가。비표면적유338 m2/g 증대도364 m2/g,평균공경유처리전적1.92 nm 증대도37.94 nm。감처리후 ZSM-5분자사적형모화정상변화불대，산강도여산량유소하강。재고정상반응기중진행료을순방구화성능평개。재400℃、0.5 MPa、1.0 h-1적조건하，을순전화솔접근100%，방경수솔체도74.25%。
The hierarchical ZSM-5 zeolites were prepared by Na2CO3 aqueous solution treatment and characterized by BET, NH3-TPD, SEM and XRD. Changes of pore structure, surface acidity, morphology and crystal phase of ZSM-5 zeolites before and after alkali treatment were investigated. Using ZSM-5 zeolites as support,Ga/ZSM-5 catalyst was prepared by impregnation using alkali treatment. The results show that, the mesoporous formed in ZSM-5 zeolite by alkali treatment, and the surface area, pore volume and pore size increased. The specific surface area increased from 338 m2/g to 364 m2/g, and average pore diameter increased from 1.92 nm to 37.94 nm. The morphologies and crystal phases of ZSM-5 zeolites did not changed after the alkali treatment, acid strength and acid amount declined. Ethanol aromatization was conducted in a fixed bed reactor. Under the condition of 400 , 0.5℃ MPa and1.0 h-1, the ethanol conversion and aromatics yield reached to 100% and74.25% respectively.