二次嫁接法制备氨基修饰的硅基二氧化碳吸附剂

李勇; 李磊; 闻霞; 王峰; 赵宁; 肖福魁; 魏伟; 孙予罕

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二次嫁接法制备氨基修饰的硅基二氧化碳吸附剂

李勇^1,2,
李磊¹,
闻霞¹,
王峰¹,
赵宁¹,
肖福魁¹,
魏伟^1,,
孙予罕^1,3

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049;
3.
中国科学院上海高等研究院低碳转化中心, 上海 201203

基金项目: 国家自然科学基金(20906099);中国科学院战略性先导科技专项(XDA05010109、XDA05010110、XDA05010204)。

详细信息

通讯作者:
魏伟, E-mail: weiwei@sxicc.ac.cn。

中图分类号: TQ028
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- 被引次数: 0
出版历程
- 收稿日期: 2013-02-12
- 修回日期: 2013-04-09
- 刊出日期: 2013-09-30

Synthesis of amine modified silica for the capture of carbon dioxide by a twice grafting method

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
Low Carbon Conversion Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, China

摘要

摘要: 采用二次嫁接法制备了一系列氨基修饰的SBA-15二氧化碳(CO₂)吸附剂,利用XRD、BET、热重、元素分析、电镜、红外等表征手段对吸附剂进行了表征,并通过固定床测量穿透曲线的方法研究了其CO₂吸附性能,分别考察了不同制备途径和不同有机胺类型等因素对吸附剂结构以及其CO₂吸附性能的影响,同时,还通过多次吸脱附实验考察了吸附剂循环吸脱附的稳定性。结果表明,超声法所制备的聚乙烯亚胺(PEI)嫁接的吸附剂具有最优的CO₂吸附性能,在CO₂分压为10 kPa,反应温度为25 ℃时,吸附量达到1.72 mmol/g;进行多次循环吸脱附实验后,吸附量未见明显降低,表明吸附剂具有稳定的循环吸附性能。
- 二次嫁接 /
- 氨基修饰 /
- CO₂ /
- 吸附剂
Abstract: A series of amine modified SBA-15 was prepared by a twice grafting method for CO₂ capture. The resulted materials were characterized by X-ray diffraction (XRD), N₂ adsorption/desorption, thermogravimetry (TG), elemental analysis, transmission electron microscopy (TEM) and Flourier transform infrared (FT-IR) spectrometry. CO₂ adsorption capacity of the adsorbents was obtained in a fixed bed through a breakthrough curve method. Effects of different preparation methods and different types of grafted organic amines were studied and recycled adsorption/desorption testing was carried out to evaluate the stability of the adsorbents. The results showed that, polyethylenimine(PEI) grafted SBA-15 prepared by supersonic method showed the best adsorption capacity, the optimist result was 1.72 mmol/g at 25 ℃ and 10 kPa CO₂ partial pressure. Furthermore, its adsorption capacity was found to be remaining constant after multiple adsorption/desorption cycles, indicating the high thermal stability of this adsorbent.
- twice grafting /
- amine modified /
- CO₂ /
- adsorbent