Modification to L-H Kinetics Model and Its Application in the Investigation on Photodegradation of Gaseous Benzene by Nitrogen-Doped TiO2
Abstract
:1. Introduction
2. Results and Discussion
2.1. Characterization of the N-TiO2 Photocatalysts
2.2. Kinetic Study of Photocatalytic Degradation of Benzene under Different Illumination Intensity
2.3. Modication to the L-H Model and Kinetic Results under Different Illumination Intensity
2.4. The Adsorption Equilibrium Constant KL Obtained by Using Adsorption Theory
2.5. Verification of the Modified L-H Model
3. Materials and Methods
3.1. Preparation and Characterization of Samples
3.2. Photocatalytic Reaction System
3.3. Photocatalytic Reaction Procedures
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Illumination Intensity/104 lx | kpm/ 10−6 mol·kg−1·s−1 | KL/ m3·mol−1 | R2 |
---|---|---|---|
36.7 | 3.992 | 1139 | 0.9981 |
46.9 | 5.731 | 1064 | 0.9847 |
61.7 | 8.589 | 791 | 0.9961 |
75.1 | 11.55 | 597 | 0.9674 |
Illumination Intensity/104 lx | Photoreaction Coefficient kpm/10−6 mol·kg−1·s−1 | Coverage Coefficient Km/m3·mol−1 | Adsorption Constant ka/m3·kg−1·−1 | Desorption Constant kd/mol·kg−1·s−1 | Adsorption Equilibrium Constant KL/m3·mol−1 |
---|---|---|---|---|---|
36.7 | 3.992 | 1139 | 9.242 × 10−3 | 3.514 × 10−6 | 2629 |
46.9 | 5.731 | 1064 | |||
61.7 | 8.589 | 791 | |||
75.1 | 11.55 | 597 |
Total Concentration Filled into the Reactor ct/ppm | Initial Concentration after Adsorption Equilibrium c0/ppm |
---|---|
15 | 7.79 |
18.75 | 10.29 |
22.5 | 13.41 |
26.25 | 16.17 |
30 | 19.56 |
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Sun, P.; Zhang, J.; Liu, W.; Wang, Q.; Cao, W. Modification to L-H Kinetics Model and Its Application in the Investigation on Photodegradation of Gaseous Benzene by Nitrogen-Doped TiO2. Catalysts 2018, 8, 326. https://doi.org/10.3390/catal8080326
Sun P, Zhang J, Liu W, Wang Q, Cao W. Modification to L-H Kinetics Model and Its Application in the Investigation on Photodegradation of Gaseous Benzene by Nitrogen-Doped TiO2. Catalysts. 2018; 8(8):326. https://doi.org/10.3390/catal8080326
Chicago/Turabian StyleSun, Peng, Jun Zhang, Wenxiu Liu, Qi Wang, and Wenbin Cao. 2018. "Modification to L-H Kinetics Model and Its Application in the Investigation on Photodegradation of Gaseous Benzene by Nitrogen-Doped TiO2" Catalysts 8, no. 8: 326. https://doi.org/10.3390/catal8080326