New Approach to Enhance CO2 Capture of "molecular Basket" Sorbent by Using 3-Aminopropyltriethoxysilane to Reshape Fumed Silica Support

Xiaoxing Wang, Mamoru Fujii, Chunshan Song

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Here we report a new approach to enhance CO2 capture and separation over a solid molecular basket sorbent by reorganizing the aggregation of fumed silica (FS) support particles with the addition of 3-aminopropyltriethoxysilane (APTES). After APTES modification, although the surface area of fumed silica decreased, the total pore volume increased significantly, more than 2 times larger than that of fumed silica itself. Compared to fumed silica supported PEI sorbent, the 30PEI/APTES-FS sorbent can achieve a CO2 capacity as high as 130.4 mg-CO2/g-sorb, a 44% increase from 90.4 mg-CO2/g-sorb over 30PEI/FS. The amine efficiency of PEI for CO2 sorption was also improved by over 25%. Furthermore, both the CO2 sorption and desorption kinetics were greatly enhanced by 1.23 and 1.61 times, respectively, compared to the PEI/FS sorbent without APTES modification. In addition, the stability and regenerability of PEI/FS sorbent was also greatly improved.

Original languageEnglish (US)
Pages (from-to)7267-7273
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume59
Issue number15
DOIs
StatePublished - Apr 15 2020

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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