CAJ | 학술논문

采用Taguchi试验方法优化出了以高岭土为原料制备高硅NaY分子筛的最佳合成参数,考察了硅溶胶的加入量、反应体系的碱度、加水量以及晶化时间对NaY分子筛硅铝比和结晶度的影响.结果表明,高硅NaY分子筛的最佳合成条件是:反应体系各组分的物质的量比为7.5SiO2:1.0Al2O3:2.2Na2O:120H2O,晶化时间为16 h.同时发现,对合成样品性能的影响最为显著的因素是硅溶胶的加入量和碱度.采用X射线衍射、N2静态容量吸附法和扫描电镜对利用最佳条件所合成样品的硅铝比、比表面积、孔分布以及表现形貌进行了表征.结果显示,以高岭土原料制备的NaY分子筛比参考样品拥有更高的硅铝比和更大的比表面积.
채용Taguchi시험방법우화출료이고령토위원료제비고규NaY분자사적최가합성삼수,고찰료규용효적가입량、반응체계적감도、가수량이급정화시간대NaY분자사규려비화결정도적영향.결과표명,고규NaY분자사적최가합성조건시:반응체계각조분적물질적량비위7.5SiO2:1.0Al2O3:2.2Na2O:120H2O,정화시간위16 h.동시발현,대합성양품성능적영향최위현저적인소시규용효적가입량화감도.채용X사선연사、N2정태용량흡부법화소묘전경대이용최가조건소합성양품적규려비、비표면적、공분포이급표현형모진행료표정.결과현시,이고령토원료제비적NaY분자사비삼고양품옹유경고적규려비화경대적비표면적.
This paper repots a study of using Taguchi technology to find the optimum parameters for the synthesis of high-silica Y-zeolite from kaolinite.The effects of additional silica source,alkali,distilled water,and crystallization time on the synthesis of high Si/Al zeolite Y were investigated.The results show that the dosage of additional silica source (silica sol) and alkali are the most influential factors on the synthesis of high-silica Y zeolite.The optimum preparation conditions are that the molar composition of sodium aluminosilicate gel is 7.5SiO2:1.0Ai2O3:2.2Na2O:120H2O,and crystallization time is 16 h.The NaY zeolite synthesized at optimized conditions was characterized by X-ray diffraction(XRD),N2 adsorption-desorption techniques and Scanning electron microscope(SEM).The characterization results indicate that the sample has higher Si/Al ratio and larger Surface area than the referenee Y zeolite sample.