| 多级孔NaX分子筛的合成及CO2吸附性能 |
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| 引用本文： | 王煜瑶,张强,于吉红. 多级孔NaX分子筛的合成及CO2吸附性能[J]. 高等学校化学学报, 2020, 41(4): 616-622. DOI: 10.7503/cjcu20200083 |
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| 作者姓名： | 王煜瑶 张强 于吉红 |
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| 作者单位： | 1. 吉林大学无机合成与制备化学国家重点实验室, 化学学院;2. 未来科学国际合作联合实验室, 长春 130012 |
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| 基金项目： | 国家自然科学基金(批准号:21621001)资助. |
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| 摘 要： | 采用两步晶化和氨基酸辅助的协同合成策略, 制备了具有高产率(89%)和高结晶度(微孔体积为0.30 cm 3/g)的多级孔NaX分子筛. 利用X射线粉末衍射、 扫描电子显微镜、 透射电子显微镜和氮气吸附等技术, 考察了两步晶化和氨基酸加入量对NaX分子筛的形貌、 相对结晶度和产率的影响. 实验结果表明, 两步晶化有利于多级孔结构的产生, 氨基酸的引入有助于提高分子筛相对结晶度和产率. 与传统方法合成的NaX分子筛相比, 该合成策略制备的多级孔NaX分子筛展现出更优异的CO2吸附性能, 在273 K和100 kPa条件下, 其CO2吸附量达到154.2 cm 3/g, 而传统NaX分子筛的CO2吸附量为147.6 cm 3/g. 该合成策略为绿色且高效制备高质量的多级孔分子筛提供了新思路.
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| 关 键 词： | NaX分子筛 多级孔 两步晶化 L-赖氨酸 CO2吸附 |
| 收稿时间： | 2020-02-19 |
Synthesis of Hierarchical NaX Zeolite and Its CO2 Adsorption Performance |
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| WANG Yuyao,ZHANG Qiang,YU Jihong. Synthesis of Hierarchical NaX Zeolite and Its CO2 Adsorption Performance[J]. Chemical Research In Chinese Universities, 2020, 41(4): 616-622. DOI: 10.7503/cjcu20200083 |
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| Authors: | WANG Yuyao ZHANG Qiang YU Jihong |
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| Affiliation: | 1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry;2. International Center of Future Science, Jilin University, Changchun 130012, China |
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| Abstract: | High-quality hierarchical NaX zeolites with high product yield and high crystallinity were prepared by synergistically using a two-step crystallization process and L-lysine-assisted approach.XRD,SEM,TEM,XRF and N 2 adsorption-desorption tests are used to investigate the influence of L-lysine and crystallization steps on the mesoporosity,crystallinity,and the yield of NaX zeolites.In this synthetic strategy,two-step crystallization favors the generation of mesopores;and L-lysine plays an important role in improving the zeolite crystallinity as well as the product yield.Owing to the high-quality hierarchical zeolite crystals,the as-prepared NaX zeolite exhibits excellent performance in CO2 adsorption with CO2 uptake of 154.2 cm^3/g at 273 K and 100 kPa.This green and facile synthetic strategy opens a new way to fabricate high-quality hierarchical NaX zeolites,promising their practical applications in CO2 adsorption. |
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| Keywords: | NaX zeolite Hierarchical structure Two-step crystallization L-lysine CO2 adsorption |
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