| 循环流化床粉煤灰可控制备高纯F型八面沸石研究 |
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| 引用本文： | 张丽宏,马斯琪.循环流化床粉煤灰可控制备高纯F型八面沸石研究[J].人工晶体学报,2020,49(2):339-345. |
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| 作者姓名： | 张丽宏 马斯琪 |
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| 作者单位： | 山西大学资源与环境工程研究所,山西低附加值煤基资源高值利用协同创新中心,国家环境保护煤炭废弃物资源化高效利用技术重点实验室,太原 030006;山西大学资源与环境工程研究所,山西低附加值煤基资源高值利用协同创新中心,国家环境保护煤炭废弃物资源化高效利用技术重点实验室,太原 030006 |
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| 基金项目： | 国家重点研发计划资助项目(2017YFB0603100);山西省应用基础研究计划项目(201801D221328)。 |
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| 摘 要： | 利用粉煤灰制备沸石分子筛是其高值化利用的重要方向之一.以循环流化床粉煤灰为原料,采用酸浸预处理-氢氧化钠碱熔活化-水热晶化法制备F型八面沸石,并用于吸附亚甲基蓝.考察酸浸温度、碱熔温度及碱灰质量比对粉煤灰结构的影响及碱熔温度、碱灰质量比、液固比及晶化时间对沸石的结构和形貌的影响.通过XRD和SEM对粉煤灰沸石的晶体结构和形貌进行表征.结果表明,利用循环流化床粉煤灰制备高纯F型八面沸石适宜条件为碱熔温度550℃,碱灰质量比1.5:1,液固比12 mL/g,晶体导向剂用量10;,晶化温度100℃,晶化时间20 h.其比表面积高达357 m2/g,且对亚甲基蓝的饱和吸附量高达178 mg/g.
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| 关 键 词： | 循环流化床粉煤灰 碱熔活化 水热法 F型八面沸石 亚甲基蓝 |
Preparation of Highly Purity Zeolite F from Circulating Fluidized Bed Fly Ash |
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| ZHANG Lihong,MA Siqi.Preparation of Highly Purity Zeolite F from Circulating Fluidized Bed Fly Ash[J].Journal of Synthetic Crystals,2020,49(2):339-345. |
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| Authors: | ZHANG Lihong MA Siqi |
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| Affiliation: | (State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources,Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes,Institute of Resources and Environmental Engineering,Shanxi University,Taiyuan 030006,China) |
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| Abstract: | The preparation of zeolite F from coal fly ash is highly desired.F-typed zeolite was prepared by acidic pretreatment-alkali fusion activation-hydrothermal crystallization with circulating fluidized bed fly ash as raw material and used for adsorption of methylene blue.The influence of acid leaching temperature,alkali melting temperature and mass ratio of alkali to ash on the structure of fly ash,as well as the influence of alkali melting temperature,mass ratio of alkali to ash,volume to mass ratio of liquid and solid and crystallization time on the structure and morphology of zeolite were investigated.The crystal structure and morphology of zeolite were characterized by XRD and SEM,respectively.The results show that the optimum conditions for preparing highly purity F-type zeolite with fly ash in circulating fluidized bed are as followed:alkaline fusion temperature of 550℃,alkali to ash ratio of 1.5:1,liquid to solid ratio of 12 mL/g,amount of crystal directing agent up to 10%,crystallization temperature of 100℃,crystallization time of 20 h.And its specific surface area was up to 357 m^2/g,and the saturated adsorption capacity of methylene blue amounted to 178 mg/g. |
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| Keywords: | circulating fluidized bed fly ash alkali fusion hydrothermal method zeolite F methylene blue |
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