CAJ | 학술논문

以粉煤灰分级处理获得的硅铝组分Na2 SiO3和NaAlO2为原料,通过水热反应制备了NaP型分子筛.考察了钠盐不同阴离子和有机空间位阻剂对NaP分子筛制备的影响,优化了水热合成NaP分子筛的工艺参数,采用X射线衍射( XRD)、扫描电子显微镜( SEM)和BET方程对NaP分子筛产品的晶型、形貌和孔容进行分析表征,对NaP分子筛吸附水溶液中Ni2+的性能进行了评价.结果表明,合成NaP分子筛的最佳原料摩尔比为n(Na2O)：n(SiO2)：n(Al2O3)：n(H2O)=3.23：1.95：1：226,反应温度为120℃,晶化时间为8 h.当钠盐中阴离子为Br-时,可增大 P型分子筛产率并提高其纯度.添加有机空间位阻剂三乙醇胺( TEA )[n(TEA)：n(Al2O3)=1：1]时,合成的P型分子筛粒径较小且具有较大的孔容,此时对应的Ni2+去除率较高,可达96.2%.
이분매회분급처리획득적규려조분Na2 SiO3화NaAlO2위원료,통과수열반응제비료NaP형분자사.고찰료납염불동음리자화유궤공간위조제대NaP분자사제비적영향,우화료수열합성NaP분자사적공예삼수,채용X사선연사( XRD)、소묘전자현미경( SEM)화BET방정대NaP분자사산품적정형、형모화공용진행분석표정,대NaP분자사흡부수용액중Ni2+적성능진행료평개.결과표명,합성NaP분자사적최가원료마이비위n(Na2O)：n(SiO2)：n(Al2O3)：n(H2O)=3.23：1.95：1：226,반응온도위120℃,정화시간위8 h.당납염중음리자위Br-시,가증대 P형분자사산솔병제고기순도.첨가유궤공간위조제삼을순알( TEA )[n(TEA)：n(Al2O3)=1：1]시,합성적P형분자사립경교소차구유교대적공용,차시대응적Ni2+거제솔교고,가체96.2%.
Taking Na2 SiO3 and NaAlO2 obtained from flying ash by staged treatment as raw material, NaP zeo-lite was prepared via hydrothermal method. The influences of organic steric agents and sodium salts with differ-ent anions on the preparation of NaP zeolite were investigated. The synthetic parameters of the hydrothermal system for NaP zeolite were optimized. The crystal form, morphology and pore volume of the NaP zeolite were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and Brunauer-Emmett-Teller ( BET ) surface analysis, respectively. The adsorption performance of the NaP zeolite in Ni2+-containing solution was evaluated. The results show that the optimal parameters for the preparation NaP zeolite are as following:n(Na2O) : n(SiO2) : n(Al2O3) : n(H2O)= 1.66:1:0.51:116, the reaction temperature is 120 ℃, crystalization time is 8 h. Br- is in favor of improving the purity and increasing the yield of NaP zeolite. With the addition of triethylolamine( TEA) , the grain size of NaP zeolite becomes smaller and the pore volume is enlarged. The maximum removal rate for Ni2+ is about 96.2%.