Enhanced kinetics for CO2 sorption in amine-functionalized mesoporous silica nanosphere with inverted cone-shaped pore structure

Feijian Lou, Anfeng Zhang, Guanghui Zhang, Limin Ren, Xinwen Guo, Chunshan Song

Research output: Contribution to journalArticle

Abstract

Amine-functionalized mesoporous silica is one of the most promising solid sorbents for CO2 capture. The pore structure of sorbents plays a crucial role in enhancing sorption and desorption kinetics. In this work, mesoporous silica nanosphere (MSN) with inverted cone-shaped pore structure was synthesized and examined as the support for polyethyleneimine (PEI). The unique pore structure of MSN support for PEI resulted in significantly faster sorption and desorption rates and higher sorption capacity within short sorption time when compared to the benchmark support SBA-15 with the same amount of PEI loading. With 65 wt% PEI loading, 65PEI/MSN sorbent showed about 50% higher working capacity, together with 27% faster rate of CO2 sorption and 71% faster rate of CO2 desorption, compared to that with 65PEI/SBA-15 in sorption/desorption cycles. PEI/MSN sorbents have great potential for practical applications in CO2 capture.

Original languageEnglish (US)
Article number114637
JournalApplied Energy
Volume264
DOIs
StatePublished - Apr 15 2020

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

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