等离子体辅助快速合成磁性Fe3O4/NaA复合材料及其CO2吸附性能

doi:10.16085/j.issn.1000-6613.2019-0022

化工进展 ›› 2019, Vol. 38 ›› Issue (9): 4197-4203.DOI: 10.16085/j.issn.1000-6613.2019-0022

等离子体辅助快速合成磁性Fe₃O₄/NaA复合材料及其CO₂吸附性能

金晴¹(),徐建²,杨自然³,王臣辉¹,胡军¹(),刘洪来¹

1. 华东理工大学化学与分子工程学院，上海 200237
2. 上海市计量测试技术研究院，上海 200233
3. 中国石化;上海石油化工股份有限公司，上海 200540

收稿日期:2019-01-04 出版日期:2019-09-05 发布日期:2019-09-05
通讯作者: 胡军
作者简介:金晴（1994—），女，硕士研究生，研究方向为材料物理化学。E-mail：Y30160237@mail.ecust.edu.cn。
基金资助:
国家重点基础研发计划(2015BAC04B01);国家自然科学基金(21676080)

Ultrafast synthesis of magnetic Fe₃O₄/NaA composites through plasma treatment for CO₂ capture

Qing JIN¹(),Jian XU²,Ziran YANG³,Chenhui WANG¹,Jun HU¹(),Honglai LIU¹

1. School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
2. Shanghai Institute of Metrology and Testing Technology, Shanghai 200233, China
3. Sinopec Shanghai Petrochemical Company Limited, Shanghai 200540, China

Received:2019-01-04 Online:2019-09-05 Published:2019-09-05
Contact: Jun HU

摘要/Abstract

摘要：

吸附法是捕集分离CO₂等温室气体的重要方法，磁性复合材料能实现气固相快速分离而备受关注。本文利用介质阻挡放电等离子体处理方法，分别对磁性Fe₃O₄和分子筛前体进行处理，再通过水热法快速制备了Fe₃O₄/NaA复合材料。利用X射线衍射、红外光谱、扫描电镜和元素扫描等技术进行了表征，并考察了复合材料中Fe₃O₄/NaA含量比对CO₂吸附性能和磁性能的影响。结果显示，当Fe₃O₄的质量分数为23.2％时，Fe₃O₄/NaA复合材料既具有优异CO₂吸附能力（2.10mmol/g），又具有较好的磁性（25.92emu/g），同时CO₂吸附-脱附循环稳定性高，是一种新型磁性CO₂吸附剂。在采用流化床吸附捕集CO₂技术中，有望实现气固高效磁分离。

关键词: CO₂吸附捕集, 等离子体处理, 磁性材料, Fe₃O₄/NaA复合材料

Abstract:

Adsorption is an important method for CO₂ capture and separation. Recently, magnetic composites have attracted much attention for their ability to achieve rapid gas-solid separation. Herein, Fe₃O₄/NaA composites were rapidly synthesized by the hydrothermal method using dielectric barrier discharge (DBD) treatments for magnetic Fe₃O₄ nanoparticles and NaA sieve precursors, respectively. By using characteristics of X-ray diffraction, FTIR, SEM and SEM-EDS, the structure properties of composites were demonstrated. Meanwhile, the effect of the molar ratio of Fe₃O₄/NaA in composites on their CO₂ adsorption capacity and magnetic property were investigated. It was found that when the mass fraction of Fe₃O₄ was 23.2%, the Fe₃O₄/NaA composite showed both excellent CO₂ adsorption capacity （2.10mmol/g） and magnetic properties (25.92emu/g). More importantly, with good cycle stability of CO₂ adsorption, Fe₃O₄/NaA composite provided an excellent magnetic CO₂ adsorbent for potential fast magnetic gas-solid separation in the fluidized bed for CO₂ capture.

Key words: CO₂ capture, plasma treatment, magnetic material, Fe₃O₄/NaA composites

中图分类号:

金晴,徐建,杨自然,王臣辉,胡军,刘洪来. 等离子体辅助快速合成磁性Fe₃O₄/NaA复合材料及其CO₂吸附性能[J]. 化工进展, 2019, 38(9): 4197-4203.

Qing JIN,Jian XU,Ziran YANG,Chenhui WANG,Jun HU,Honglai LIU. Ultrafast synthesis of magnetic Fe₃O₄/NaA composites through plasma treatment for CO₂ capture[J]. Chemical Industry and Engineering Progress, 2019, 38(9): 4197-4203.

图/表 10

图1 介质阻挡放电装置

图2 等离子处理合成Fe3O4/NaA-x复合材料

图3 等离子体处理之前和之后Fe3O4样品的特征谱图

图4 Fe3O4/NaA-x复合材料的PXRD图谱

图5 NaA以及Fe3O4/NaA-x系列复合材料FESEM图

图6 Fe3O4/NaA-x系列复合材料SEM-EDS图

图7 298 K时，系列材料Fe3O4/NaA-x(x=0.2、0.5、0.8、1.0)的CO2吸附等温线和磁滞回线

表1 系列材料Fe3O4/NaA-x(x=0.2、0.5、0.8、1.0)的Fe3O4

材料	Fe₃O₄质量分数/%	CO₂吸附量 /mmol·g^-1	磁矩/emu·g^-1
Fe₃O₄/NaA-1.0	37.7	1.89	32.57
Fe₃O₄/NaA-0.8	23.2	2.10	25.92
Fe₃O₄/NaA-0.5	13.8	2.81	17.16
Fe₃O₄/NaA-0.2	8.7	3.04	4.02

图8 Fe3O4/NaA-0.8的多孔性质表征图

图9 Fe3O4/NaA-0.8的稳定性及工业应用

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等离子体辅助快速合成磁性Fe₃O₄/NaA复合材料及其CO₂吸附性能

Ultrafast synthesis of magnetic Fe₃O₄/NaA composites through plasma treatment for CO₂ capture

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