沸石
粉煤灰
化学工程
蔗渣
结晶
溶解
方解石
热液循环
材料科学
硅酸盐
碱金属
固化(化学)
膨润土
化学
矿物学
核化学
有机化学
制浆造纸工业
催化作用
高分子化学
工程类
作者
Chandra Wahyu Purnomo,Chris Salim,Hirofumi Hinode
标识
DOI:10.1016/j.micromeso.2012.06.007
摘要
Bagasse fly ash (BFA), a solid waste from sugar cane industries, is still underutilized leaving disposal problems. In fact, high silica content inside this material opens a possibility to become a potential zeolites precursor. In this study, fine particles of BFA has been reused to prepare zeolite Na–X and Na–A with high purity. After segregated by mechanical sieving, the small particle fraction of BFA has been subjected to alkali fusion treatment followed by dissolution and then residue separation to produce clear silicate supernatant as the silica source for preparing the low-silica zeolites. High purity of Na–X and Na–A zeolites were prepared using hydrothermal treatment by optimizing the process condition, i.e., curing time, hydrothermal temperature and Si/Al molar ratio in the reaction mixture. Furthermore, the effect of several anions on the rate of zeolite X crystallization was also investigated.
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