无机盐工业 ›› 2022, Vol. 54 ›› Issue (5): 144-150.doi: 10.19964/j.issn.1006-4990.2021-0566
• 催化材料 • 上一篇
芦静1(),陈治平1,2,3(
),李建伟1,2,3,瞿颖1,周文武1,2,3,杨志远1,2,3,周安宁1,2,3
收稿日期:
2021-09-16
出版日期:
2022-05-10
发布日期:
2022-05-31
作者简介:
芦静(1997— ),女,在读硕士,主要从事催化材料和催化剂的研究;E-mail:基金资助:
LU Jing1(),CHEN Zhiping1,2,3(
),LI Jianwei1,2,3,QU Ying1,ZHOU Wenwu1,2,3,YANG Zhiyuan1,2,3,ZHOU Anning1,2,3
Received:
2021-09-16
Published:
2022-05-10
Online:
2022-05-31
摘要:
采用碱熔活化方法对伊利石进行活化,系统地考察了煅烧温度、煅烧时间、矿物粒度、矿碱质量比等条件对伊利石活化的影响;以活化伊利石为主要硅、铝源,采用水热法合成磷酸硅铝分子筛(SAPO-11),系统地考察模板剂种类、模板剂用量、投料硅铝物质的量比、晶化温度等合成条件对产物结构和性质的影响。利用X射线衍射(XRD)、N2吸附-脱附、扫描电镜(SEM)和透射电镜(TEM)等分析手段对活化产物和合成的分子筛进行了分析表征,结果表明,伊利石的最佳碱熔活化条件为煅烧温度为800 ℃、煅烧时间为90 min、伊利石矿粒径为75 μm、矿碱质量比为1∶0.8,经活化后伊利石的晶型结构基本完全被破坏,活化产物主要是高活性的低聚合态硅铝酸盐,化学反应活性较高;在原料配比为n(三氧化二铝)∶n(五氧化二磷)∶n(模板剂)∶n(二氧化硅)∶n(水)=1∶1∶1∶0.5∶50、水热晶化温度为190 ℃、晶化时间为24 h时成功合成结晶度较高的纯相SAPO-11分子筛,合成的SAPO-11分子筛具有较大的比表面积,样品主要由粒径为1~3 μm的椭球状颗粒组成,该合成方法丰富了磷酸硅铝(SAPO)分子筛的原料来源,拓展了中国伊利石的高附加值利用途径。
中图分类号:
芦静,陈治平,李建伟,瞿颖,周文武,杨志远,周安宁. 伊利石合成磷酸硅铝分子筛及其表征[J]. 无机盐工业, 2022, 54(5): 144-150.
LU Jing,CHEN Zhiping,LI Jianwei,QU Ying,ZHOU Wenwu,YANG Zhiyuan,ZHOU Anning. Synthesis and characterization of silicoaluminophosphate molecular sieve from illite[J]. Inorganic Chemicals Industry, 2022, 54(5): 144-150.
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