用油页岩灰制备沸石分子筛及响应面优化  

Zeolite Synthesized with Oil Shale Ash and Optimized by Response Surface Method

作　　者：刘宝蔓 初茉[1] 白书霞[1] 杨彦博 贾晨昕 吕飞勇 LIU Baoman;CHU Mo;BAI Shuxia;YANG Yanbo;JIA Chenxin;LYU Feiyong(College of Chemical&Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《硅酸盐学报》2020年第8期1317-1324,共8页Journal of The Chinese Ceramic Society

基　　金：国家重点研发专项子课题(SQ2019YFC190273);国家自然科学基金(51974323)。

摘　　要：以兰州窑街油页岩灰为原料制备沸石分子筛,基于单因素试验,采用Box-Behnken Design (BBD)响应面法考察液固比(A)、晶化时间(B)、晶化温度(C)对合成沸石阳离子交换量(Y)的影响效应。结果表明:响应面法建立的模型对合成沸石的Y值具有良好的预测性,优化后提高了沸石Y值。各因素及其交互作用对合成沸石Y值的影响大小依次为:A,C,B和AC,BC,AB。制备Na-X型合成沸石的最优条件为:碱熔温度650℃、灰碱比1:1.7 g/g、液固比4.5:1 mL/g、晶化时间25.2 h、晶化温度83℃,此时沸石Y值达52.44 mg/g。A zeolite molecular sieve was synthesized with oil shale ash from Yaojie, China. The effects of liquid-solid ratio(A), crystallization time(B) and crystallization temperature(C) on the cation exchange capacity(Y) of synthesized zeolite were investigated based on the Box-Behnken Design(BBD) of a response surface method. The results show that the model established by the response surface method has a good predictability for the Y value of zeolite, and the Y value of zeolite is improved after optimization. Each factor and their interaction have effects on the Y value of synthesized zeolite, and the order of the factor effect is A, C, and B and the order of interaction effect is AC, BC, and AB. The Na-X zeolite can be synthesized under optimum conditions(i.e., alkali melting temperature of 650 ℃, ash-alkali ratio of 1:1.7 g/g, liquid-solid ratio of 4.5:1 mL/g, crystallization time of 25.2 h, and crystallization temperature of 83 ℃). The Y value of zeolite synthesized under optimum conditions is 52.44 mg/g.

关 键 词：油页岩灰 沸石 响应面法 数学模型 因素分析 

分 类 号：X705[环境科学与工程—环境工程]