Volume 33, Issue 224 ( 2023)
J Mazandaran Univ Med Sci 2023, 33(224): 117-128 |
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Dianati Tilaki R A, Shabantabar Shouraki S, Babanejad Arimi E, Shabankhani B. Removal of Carbon Dioxide from Indoor Air Using Nanofluid
Absorption Solution. J Mazandaran Univ Med Sci 2023; 33 (224) :117-128
URL: http://jmums.mazums.ac.ir/article-1-19258-en.html
URL: http://jmums.mazums.ac.ir/article-1-19258-en.html
Ramazan Ali Dianati Tilaki 
, Saeedeh Shabantabar Shouraki , Esmaeil Babanejad Arimi , Bizhan Shabankhani
, Saeedeh Shabantabar Shouraki , Esmaeil Babanejad Arimi , Bizhan Shabankhani
Abstract: (1393 Views)
Background and purpose: Human health is negatively affected by increase in concentration of carbon dioxide in indoor air due to the lack of proper ventilation. The aim of this study was to remove carbon dioxide from a closed space using sodium hydroxide nanofluid and determining the effect of absorbent concentration, carbon dioxide concentration, and titanium dioxide nanoparticles.
Materials and methods: The experiments were conducted in a closed chamber on a laboratory scale. An air suction pump was connected to the absorption reactor and the carbon dioxide measuring device was installed inside the chamber. By injecting carbon dioxide gas inside the chamber, different concentrations in the range of 500, 2000 and 5000 ppm were created. Sodium hydroxide absorbent solution at 0.1, 0.2, and 0.4% were examined. Titanium dioxide nanoparticles (0.008%) and surfactant (0.003%) were used to prepare nanofluids. The absorption fluids’ pH, electrical conductivity, and total inorganic carbon (TIC) were measured before and after carbon dioxide absorption.
Results: By using 0.4% sodium hydroxide solution containing 0.008% titanium dioxide nanoparticles, the carbon dioxide removal efficiency at 500 and 5000 ppm were 72% and 44%, respectively, that were higher than the solution without nanoparticles (20% and 10%, respectively). At 5000 ppm carbon dioxide, increasing the concentration of absorption solution from 0.1 to 0.4% doubled the removal efficiency. The average amount of total inorganic carbon (TIC) in nanofluids increased by about 20% compared to the base fluids. The average reduction of EC in nanofluid was about 25% higher than the base fluid. The average reduction in pH value was less than one unit.
Conclusion: Sodium hydroxide nanofluid containing 0.008% of titanium dioxide nanoparticles is effective in removing carbon dioxide from the air.
Materials and methods: The experiments were conducted in a closed chamber on a laboratory scale. An air suction pump was connected to the absorption reactor and the carbon dioxide measuring device was installed inside the chamber. By injecting carbon dioxide gas inside the chamber, different concentrations in the range of 500, 2000 and 5000 ppm were created. Sodium hydroxide absorbent solution at 0.1, 0.2, and 0.4% were examined. Titanium dioxide nanoparticles (0.008%) and surfactant (0.003%) were used to prepare nanofluids. The absorption fluids’ pH, electrical conductivity, and total inorganic carbon (TIC) were measured before and after carbon dioxide absorption.
Results: By using 0.4% sodium hydroxide solution containing 0.008% titanium dioxide nanoparticles, the carbon dioxide removal efficiency at 500 and 5000 ppm were 72% and 44%, respectively, that were higher than the solution without nanoparticles (20% and 10%, respectively). At 5000 ppm carbon dioxide, increasing the concentration of absorption solution from 0.1 to 0.4% doubled the removal efficiency. The average amount of total inorganic carbon (TIC) in nanofluids increased by about 20% compared to the base fluids. The average reduction of EC in nanofluid was about 25% higher than the base fluid. The average reduction in pH value was less than one unit.
Conclusion: Sodium hydroxide nanofluid containing 0.008% of titanium dioxide nanoparticles is effective in removing carbon dioxide from the air.
Type of Study: Research(Original) |
Subject:
Environmental Health
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