粉煤灰制备镁铝层状双金属氢氧化物的研究

发布时间：2018-05-04 14:10

  本文选题：粉煤灰 + 层状双金属氢氧化物　； 参考：《中国矿业大学学报》2017年03期

【摘要】：为解决粉煤灰环境污染和低附加值利用的问题,采用硫酸作为酸浸介质浸取粉煤灰中的Al2O3,共沉淀法合成Mg-Al层状双金属氢氧化物.以XRD,IR和SEM对2组产物进行表征分析.结果表明:粉煤灰在煅烧温度900℃时活化,在浸取温度为110℃,浸取时间为150min,助溶剂与样品质量比为2∶10,硫酸浓度为3mol/L,液固质量比为15∶1时,粉煤灰中Al2O3浸取率为97.20%;共沉淀法制镁铝层状双金属氢氧化物在Mg与Al物质的量比为2∶1,pH值为10,反应温度为60℃时,得到层间距d(003)为0.781nm的层状双金属氢氧化物,以粉煤灰作为铝源可制备Mg-Al层状双金属氢氧化物.
[Abstract]:In order to solve the problems of environmental pollution and low added value utilization of fly ash, Al _ 2O _ 3 in fly ash was extracted by sulfuric acid as acid leaching medium, and Mg-Al layered bimetallic hydroxides were synthesized by co-precipitation method. The two groups of products were characterized by XRD-IR and SEM. The results show that the fly ash is activated at 900 鈩，

本文编号：1843261