| 陈立梓,洪晓明,陈爱英.高比表面积多组分NaY分子筛的介孔结构调控及其CO2吸附性能[J].有色金属材料与工程,2025,46(6):57-68. |
| 高比表面积多组分NaY分子筛的介孔结构调控及其CO2吸附性能 |
| Modulating mesoporous structure and CO2 adsorption property of multicomponent NaY molecular sieves with high specific surface area |
| |
| DOI：10.13258/j.cnki.nmme.20250226002 |
| 中文关键词: NaY型分子筛 离子掺杂 比表面积 介孔结构 CO2吸附 |
| 英文关键词:molecular sieve ion doping specific surface area mesoporous structure CO2 adsorption |
| 基金项目:国家自然科学基金资助项目（51771121，52061028）；中国能源投资集团科技项目（NMAZQ-SC-2024-012） |
|
| 摘要点击次数: 622 |
| 全文下载次数: 241 |
| 中文摘要: |
| 在沸石分子筛（Sodium Y zeolite，NaY）微孔结构中引入介孔，能够显著提升其传质扩散能力及吸附性能。研究中，在无需模板剂和导向剂的条件下，通过多组元K+和Ca2+共掺杂策略，成功合成出具有高比表面积的介孔 NaY 分子筛。针对该多组分 NaY 分子筛的介孔结构及 CO2吸附性能展开系统研究。结果显示，通过 K+和Ca2+共掺杂制备的NaY分子筛（NaCaKY），其比表面积高达 560 m2/g，显著高于纯 NaY 分子筛的464 m2/g。同时，NaCaKY不仅展现出最高的比表面积，还具有更大的孔径、孔体积，分别为5.71 nm、0.43 cm3/g，这表明 K+和 Ca2+共掺杂能够有效调控 NaY 的介孔结构。此外， K+和 Ca2+的引入使 NaCaKY 的CO2吸附性能得到显著提升，从纯 NaY 的 0.83 mmol/g 提高至 1.15 mmol/g。这充分表明，所合成的多组元 NaCaKY分子筛是用于 CO2吸附的高效载体材料。 |
| 英文摘要: |
| The introduction of mesopores into the microporous structure of zeolite molecular sieves (Sodium Y zeolite, NaY) can significantly enhance their mass transfer and diffusion capabilities as well as adsorption performance. In this work, mesoporous NaY molecular sieves with a high specific surface area were successfully synthesized via a multicomponent Ca2+ and K+ co-doping strategy without the use of templates or structure-directing agents. A systematic study was conducted on the mesoporous structure and CO2 adsorption properties of the as-synthesized multicomponent NaY molecular sieves. The results show that the specific surface area of the NaY molecular sieve prepared by Ca2+ and K+ co-doping (designated as NaCaKY) reaches up to 560 m2/g, which is significantly higher than the original 464 m2/g of pure NaY. Meanwhile, NaCaKY not only exhibits the highest specific surface area but also possesses a larger pore diameter and pore volume, which are 5.71 nm and 0.43 cm3/g, respectively. This indicates that Ca2+ and K+ co-doping can effectively regulate the mesoporous structure of NaY. Furthermore, the introduction of Ca2+ and K+ leads to a significant improvement in the CO2 adsorption performance of NaCaKY, increasing from 0.83 mmol/g for pure NaY to 1.15 mmol/g. This fully demonstrates that the synthesized multicomponent NaCaKY molecular sieve is an excellent carrier material for CO2 adsorption. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
