摘要
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%。
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 capacity 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 crystallizing in 2 mol / L sodium hydroxide solution,the best static water adsorption capacity of LSX type molecular sieve reached 33. 5%.
出处
《矿产保护与利用》
北大核心
2015年第5期41-45,共5页
Conservation and Utilization of Mineral Resources
基金
郑州市科技攻关项目(141PPTGG357)
关键词
LSX型体分子筛
焙烧
二次晶化
LSX type molecular sieve body
roasting
secondary crystallization
