| Autor: |
Kumar, Gopal, Dora, D. T. K., Devarapu, Srinivasa Reddy |
| Zdroj: |
Biomass Conversion & Biorefinery; Jun2024, Vol. 14 Issue 11, p12127-12141, 15p |
| Abstrakt: |
Carbon dioxide (CO2) is a greenhouse gas emitted from combustion of hydrocarbon-based fuels which is estimated to cause a rise in the global temperatures by about 2.5 K by twenty-first century. Various liquid and solid sorbent-based technologies have been developed to capture the CO2 from combustion gases. However, these sorbents could not enjoy the commercial success due to their corrosive and toxic characteristics together with the poor energy efficiency and economics associated with the developed technologies. In this context, a biodegradable and nontoxic natural sugarcane bagasse cellulose-based aerogel with low density (15–112 kg/m3), high porosity (92.5–99.0%), and enhanced specific surface area (254.7–321.4 m2/g) characteristics has been synthesized through robust two simple steps, viz. sol–gel preparation and the lyophilization. The in situ amine grafting is observed to enhance the CO2 capturing ability of the aerogel and its hydrophobic character with a water contact angle of 143.6°. Furthermore, the CO2 adsorption and desorption studies revealed a sorption capacity of about 0.4 mmol/g at NTP for the synthesized aerogel. Nevertheless, the flexibility, high compressive strength (12.5 MPa) together with the low thermal conductivity (0.028–0.049 W/mK) of the synthesized amine-grafted sugarcane bagasse aerogel multiplies its application as an effective CO2 adsorbent and thermal insulator. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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