矿产保护与利用
礦產保護與利用
광산보호여이용
Conservation and Utilization of Mineral Resources
2015年
5期
41-45
,共5页
LSX型体分子筛%焙烧%二次晶化
LSX型體分子篩%焙燒%二次晶化
LSX형체분자사%배소%이차정화
LSX type molecular sieve body%roasting%secondary crystallization
以低硅铝比X(LSX)粉体、高岭土和LSX型体分子筛为研究对象,利用XRD和TG-DTA等手段对其物相和热稳定性进行了表征,探讨了不同晶化条件对LSX型体分子筛静态水吸附量的影响. 研究表明,随着焙烧温度的升高,LSX粉体的结晶性遭到破坏,高岭土逐渐转化为偏高岭土. LSX型体分子筛的最佳焙烧温度为600 ℃,在二次晶化温度为95 ℃、晶化时间为5 h、氢氧化钠浓度为2 mol/L时,LSX型体分子筛的最佳静态水吸附量达到了33 .5%.
以低硅鋁比X(LSX)粉體、高嶺土和LSX型體分子篩為研究對象,利用XRD和TG-DTA等手段對其物相和熱穩定性進行瞭錶徵,探討瞭不同晶化條件對LSX型體分子篩靜態水吸附量的影響. 研究錶明,隨著焙燒溫度的升高,LSX粉體的結晶性遭到破壞,高嶺土逐漸轉化為偏高嶺土. LSX型體分子篩的最佳焙燒溫度為600 ℃,在二次晶化溫度為95 ℃、晶化時間為5 h、氫氧化鈉濃度為2 mol/L時,LSX型體分子篩的最佳靜態水吸附量達到瞭33 .5%.
이저규려비X(LSX)분체、고령토화LSX형체분자사위연구대상,이용XRD화TG-DTA등수단대기물상화열은정성진행료표정,탐토료불동정화조건대LSX형체분자사정태수흡부량적영향. 연구표명,수착배소온도적승고,LSX분체적결정성조도파배,고령토축점전화위편고령토. LSX형체분자사적최가배소온도위600 ℃,재이차정화온도위95 ℃、정화시간위5 h、경양화납농도위2 mol/L시,LSX형체분자사적최가정태수흡부량체도료33 .5%.
Based on the low-silica X (LSX) powder, kaolin and LSX type molecular sieve as the research object , the crystalline phases and thermal stability were characterized by means of XRD and TG-DTA, and the effects of different crystallization conditions of static water adsorption ca-pacity were investigated on LSX type molecular sieve .The studies in this paper showed that with the increase of roasting temperature , the crystallinity of LSX powder was destroyed , and kaolin was gradually transformed into metakaolin .The optimal roasting temperature of LSX type molecular sieve body was 600 ℃.When the secondary crystallization temperature was 95 ℃with 5 h crystal-lizing in 2 mol/L sodium hydroxide solution , the best static water adsorption capacity of LSX type molecular sieve reached 33 .5%.
