Journal
LANGMUIR
Volume 27, Issue 13, Pages 8090-8098Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la201745y
Keywords
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Funding
- National Science Council, Taiwan [NSC 99-2221-E-005-032-MY2]
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Commercially available multiwalled carbon nanotubes (CNTs) were functionalized with a high mass load of 3-aminopropyltriethoxysilane (APTS) to study their behaviors in the cyclic CO2 adsorption as well as the associated thermodynamic properties. The breakthrough curve showed a fast kinetics of CO2 adsorption resulting in percentage ratios of working capacity to equilibrium capacity greater than 80%. The adsorption capacity of CNT(APTS) was significantly influenced by the presence of water vapor and reached a maximum of 2.45 mmol/g at a water vapor of 2.2%, The adsorption capacities and the physicochemical properties of CNT(APTS) were preserved through 100 adsorption-desorption cycles displaying the stability of CNT(APTS) during a prolonged cyclic operation. The heat input required to regenerate spent CNT(APTS) was determined, and the result suggests that adsorption process with solid CNT(APTS) is possibly a promising CO2 capture technology.
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