新型胺功能化海藻酸钠吸附剂对模拟烟气中CO2的吸附性能

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文章编号： 1672-6987（2022）03001406； DOI： 10.16351/j.1672-6987.2022.03.002

杜瑾， 王芳， 车宜行， 田红景*(青岛科技大学 化工学院，山东 青岛 266042）摘要： 利用乙二醇二缩水甘油醚(EGDE)将海藻酸钠(SA)和五乙烯六胺(PEHA)进行简单的化学交联，并加入氯化钙溶液进一步使其成为水凝胶，从而制备了一种新型廉价的胺功能化海藻酸钠吸附剂，采用傅里叶变换红外光谱（FTIR）和热重等手段对吸附剂进行表征，考察了水蒸气、吸附温度、进气流量等因素对吸附容量的影响和吸附剂的循环再生性能。结果表明：当吸附温度为60 ℃、进气流量为30 mL·min-1时，SAPEHA的最佳CO2吸附量为235 mmol·g-1，且有水蒸气存在时，其吸附性能提高30%，高达303 mmol·g-1。经过10次循环再生，CO2吸附量由235降低到217 mmol·g-1，与新鲜吸附剂相比，仅降低了766%，表现出了良好的循环再生能力。

关键词： 海藻酸钠； 五乙烯六胺； CO2吸附； 水蒸气

中图分类号： X 701文献标志码： A

引用格式： 杜瑾， 王芳， 车宜行， 等. 新型胺功能化海藻酸钠吸附剂对模拟烟气中CO2的吸附性能［J］. 青岛科技大学学报(自然科学版), 2022, 43(3): 1419.

DU Jin, WANG Fang, CHE Yixing, et al. CO2 adsorption performance of novel amine functionalized sodium alginate adsorbent［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2022， 43（3）： 1419.

CO2 Adsorption Performance of Novel Amine Functionalized

Sodium Alginate AdsorbentDU Jin, WANG Fang, CHE Yixing, TIAN Hongjing

(College of Chemical Engineering, Qingdao University of Science and Technology， Qingdao 266042, China)

Abstract: A new cheap amine functionalized alginate adsorbent was prepared. Ethyleneglycol diglycidylether (EGDE) was used for chemical crosslinking of sodium alginate (SA) and pentaethylenehexamine (PEHA), and calcium chloride solution was added to make it the hydrogel. The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR) and thermogravimetry. The effects of water vapour, adsorption temperature and inlet flow rate on the adsorption capacity of CO2 and the regeneration performance of the adsorbent were investigated. The results showed that the optimal CO2 adsorption capacity of SAPEHA was 235 mmol·g-1 when the adsorption temperature was 60 ℃ and the inlet flow rate was 30 mL·min-1. The adsorption performance of SAPEHA was increased by 30% to 303 mmol·g-1 in the presence of water vapor. After 10 cycles of regeneration, the saturated adsorption capacity decreased from 235 mmol·g-1 to 217 mmol·g-1, which was only 766% lower than that of fresh adsorbent.

Key words: sodium alginate; pentaethylenehexamine; CO2 adsorption; water vapour

收稿日期： 20210627

基金项目： 国家自然科学基金项目(51106077)；山东省生态化工协同创新中心人才基金项目(XTCXQN22)；煤炭高效利用与绿色化工国家重点实验室开放课题重点项目(2020KF02).

作者简介： 杜瑾(1995—),女,硕士研究生.*通信联系人.