Enhanced CO2 adsorptive performance of PEI/SBA-15 adsorbent using phosphate ester based surfactants as additives

作者: Dandan Cheng , Yue Liu , Haiqiang Wang , Xiaole Weng , Zhongbiao Wu

DOI: 10.1016/J.JES.2015.04.025

关键词:

摘要: In this study, a series of polyetherimide/SBA-15: 2-D hexagonal P6mm, Santa Barbara USA (PEI/SBA-15) adsorbents modified by phosphoric ester based surfactants (including tri(2-ethylhexyl) phosphate (TEP), bis(2-ethylhexyl) (BEP) and trimethyl phosphonoacetate (TMPA)) were prepared for CO2 adsorption. Experimental results indicated that the addition TEP BEP had positive effects on adsorption capacity over PEI/SBA-15. particular, amount could be improved around 20% 45PEI-5TEP/SBA-15 compared to additive-free adsorbent. This attributed decrease diffusion resistance in PEI bulk network due interactions between loaded molecules, which was further confirmed kinetics results. addition, it also found cyclic performance TEP-modified adsorbent better than surfactant-free one. two main reasons, situ DRIFT TG-DSC tests. First more importantly, adsorbed species desorbed rapidly during thermal desorption process. Furthermore, enhanced stability after ensured lower degradation amine groups adsorption/desorption cycles.

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