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Adsorption isotherm and kinetic study of gas-solid system of formaldehyde on oil palm mesocarp bio-char: Pyrolysis effect
- Source :
- Journal of Environmental Chemical Engineering; February 2018, Vol. 6 Issue: 1 p970-983, 14p
- Publication Year :
- 2018
-
Abstract
- The kinetic and isotherm studies of gas-solid system were represented by oil palm mesocarp bio-char as adsorbent and formaldehyde as adsorbate. Three kinetic model; i.e pseudo-first-order, pseudo-second-order and Elovich model and three isotherm model; i.e.Langmuir, Freundlich and Temkin isotherm were applied to evaluate the applicability of the equilibrium experimental data and the pyrolysis effect was studied. As a result, oil palm fiber carbonized at 500 °C and 700 °C was best presented by the Langmuir isotherm and oil palm mesocarp carbonized at 600 °C and 800 °C followed Temkin and Freundlich model, respectively. The formaldehyde adsorption was found favorable to happen at 25 °C with initial concentration of 0.5 ppm, 0.9 ppm, 0.75 ppm and 2.1 ppm as the Langmuir dimensionless constant, RLgave the value of 0 < RL < 1. Carbonization temperature of 500 °C, 600 °C, and 700 °C was kinetically presented by pseudo-first-order kinetic equation and carbonization temperature of 800 °C followed Elovich equation. As a conclusion, the pyrolysis of oil palm mesocarp does affect the isotherm and kinetic behavior of formaldehyde adsorption on oil palm char.
Details
- Language :
- English
- ISSN :
- 22132929 and 22133437
- Volume :
- 6
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Journal of Environmental Chemical Engineering
- Publication Type :
- Periodical
- Accession number :
- ejs44472681
- Full Text :
- https://doi.org/10.1016/j.jece.2017.12.067