利用浸渍法,以聚乙烯亚胺(PEI)为胺基功能化材料对13X分子筛进行功能化改进;在PEI中添加Span80或PEG200对13X分子筛进一步优化,以提高分子筛对CO₂的吸附性能。利用XRD和FT-IR证明了PEI和Span80/PEG200的成功附着。Span80和PEG200的加入显著改善了吸附剂对CO₂的吸附性能,增加的最大CO₂吸附比例分别为21.97%、16.74%。改性后分子筛在70℃时对CO₂吸附具有较高水平,为吸附剂在碳捕集领域的应用打下了基础。

Polyethylene imine (PEI) is used as amino functional material to modify 13X molecular sieve through an immersion method.Furthermore,Span80 or PEG200 is added into PEI to further optimize 13X molecular sieve to improve its adsorption performance for CO₂.The successful adhesion between PEI and Span80 or PEG200 is proved by means of XRD and FT-IR.It is found that the addition of Span80 or PEG200 significantly improves the adsorption performance of the molecular sieve for CO₂,with the maximum increased CO₂ adsorption ratio of 21.97% and 16.74%,respectively.The modified molecular sieve has a high level of adsorption to CO₂ at 70℃,laying a foundation for the application of the modified molecular sieve in the field of carbon capture in the future.

魏炜(1978-),女,博士,副教授,主要从事二氧化碳捕集利用与封存、超临界流体和新型材料研究,hjweiwei@dlut.edu.cn。