论文部分内容阅读
首次用海泡石为硅源、高岭土为铝源,在水热条件下原位晶化合成NaY分子筛,采用粉末X射线衍射仪、电子扫描电镜等测试手段对所合成样品进行表征分析,着重考察晶化温度和投料配比对产品相对结晶度的影响.研究结果表明,NaY分子筛的形成受晶化温度的影响最大,随温度的升高,产品的相对结晶度显著提高,晶化温度升至100℃时,得到结晶度较高的NaY分子筛晶体.在原位晶化体系中,随n(SiO2)/n(Al2O3)减小,其相对结晶度增大;增加体系的n(Na2O)/n(SiO2)和减小n(H2O)/n(Na2O)都增大产品的相对结晶度;n(SiO2)/n(Al2O3)在投料比影响因素中占主导地位.
The first use of sepiolite as the source of silicon, kaolin as the source of aluminum, hydrothermal conditions in-situ crystallization of NaY zeolite, the use of powder X-ray diffraction, electron scanning electron microscopy and other means of measurement of the synthesized samples were characterized analysis, focusing on Crystallization temperature and feed ratio on the relative crystallinity of the product.The results show that the formation of NaY zeolite by the crystallization temperature of the most affected, with the increase of temperature, the relative crystallinity of the product significantly increased, the crystallization temperature rose At 100 ℃, the NaY molecular sieve crystals with higher crystallinity were obtained.In the in-situ crystallization system, the relative crystallinity increased with the decrease of n (SiO2) / n (Al2O3) The relative crystallinity of n (SiO2) and n (H2O) / n (Na2O) all increased, while n (SiO2) / n (Al2O3) dominates the influencing factors.