Adsorption Kinetics and Breakthrough of Carbon Dioxide for the Chemical Modified Activated Carbon Filter Used in the Building
Abstract
:1. Introduction
2. Experimental Method
3. Results and Discussion
3.1. Adsorption Capacity
3.2. Breakthrough
3.3. Adsorption Kinetics
3.3.1. Pseudo-First-Order Model
3.3.2. Pseudo-Second-Order Model
3.3.3. Intraparticle Diffusion Model
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Nomenclature
C | intercept of intraparticle diffusion model, mg kg−1 |
Ce | concentration of free formaldehyde in air, mg L−1 |
C0 | the inlet concentration, ppm |
k1 | the pseudo-first-order rate coefficient, min−1 |
k2 | the pseudo-second-order rate coefficient, g mg−1 min−1 |
ki | the intraparticle diffusion rate constant, mg g−1 min−1/2 |
M | testing gas molecular weight, g mole−1 |
Q | adsorption capacity, mg g−1 |
qe | the amount of adsorbed CO2, mg g−1 |
qt | the amount of adsorbate adsorbed at time t, mg g−1 |
t | testing time, min |
V | the airflow rate, L min−1 |
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Reagent and Amount | Solution (wt %) | DI Water (mL) | AC (g) |
---|---|---|---|
10 g Ca(CH3CO2)2·H2O | 4.80% | 200 | 10 |
Face Velocity (m/s) | Breakthrough Time vs. Initial Concentration |
---|---|
0.1 | , R2 = 0.9982 |
0.2 | , R2 = 0.9963 |
0.3 | , R2 = 0.9909 |
Face Velocity | Inlet Concentration | Pseudo-First Order | Pseudo-Second Order | Intra-Particle Diffusion | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
qe (exp, g) | k1 (min−1) | qe,1 (g) | r12 | k2 (g−1 min−1) | qe,2 (g) | r22 | ki (g min−1/2) | C | ri2 | ||
0.1 m/s | 800 ppm | 2.77 | 0.0082 | 2.73 | 0.7815 | 0.149 | 4.2 | 0.9519 | 0.3076 | −0.4487 | 0.9935 |
1000 ppm | 3.66 | 0.0119 | 3.64 | 0.866 | 0.2783 | 2.51 | 0.9844 | 0.2153 | −0.0979 | 0.9958 | |
1200 ppm | 4.54 | 0.0217 | 4.51 | 0.7843 | 0.5714 | 1.24 | 0.9888 | 0.1397 | −0.0266 | 0.9472 | |
0.2 m/s | 800 ppm | 2.28 | 0.011 | 2.24 | 0.8213 | 0.0777 | 5.65 | 0.9504 | 0.5096 | −1.0158 | 0.9811 |
1000 ppm | 3.01 | 0.0132 | 2.99 | 0.7827 | 0.1214 | 3.77 | 0.921 | 0.3727 | −0.6231 | 0.9771 | |
1200 ppm | 3.21 | 0.0324 | 3.16 | 0.8884 | 0.4141 | 1.58 | 0.9806 | 0.2182 | −0.0286 | 0.9975 | |
0.3 m/s | 800 ppm | 2.10 | 0.0108 | 2.10 | 0.7874 | 0.0496 | 6.96 | 0.9565 | 0.6473 | −1.4821 | 0.9671 |
1000 ppm | 2.42 | 0.0214 | 2.41 | 0.8874 | 0.253 | 2.36 | 0.9857 | 0.7353 | −0.5122 | 0.905 | |
1200 ppm | 2.77 | 0.0337 | 2.75 | 0.9074 | 0.33 | 1.73 | 0.9847 | 0.2657 | −0.1127 | 0.9888 |
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Shiue, A.; Hu, S.-C.; Chang, S.-M.; Ko, T.-Y.; Hsieh, A.; Chan, A. Adsorption Kinetics and Breakthrough of Carbon Dioxide for the Chemical Modified Activated Carbon Filter Used in the Building. Sustainability 2017, 9, 1533. https://doi.org/10.3390/su9091533
Shiue A, Hu S-C, Chang S-M, Ko T-Y, Hsieh A, Chan A. Adsorption Kinetics and Breakthrough of Carbon Dioxide for the Chemical Modified Activated Carbon Filter Used in the Building. Sustainability. 2017; 9(9):1533. https://doi.org/10.3390/su9091533
Chicago/Turabian StyleShiue, Angus, Shih-Cheng Hu, Shu-Mei Chang, Tzu-Yu Ko, Arson Hsieh, and Andrew Chan. 2017. "Adsorption Kinetics and Breakthrough of Carbon Dioxide for the Chemical Modified Activated Carbon Filter Used in the Building" Sustainability 9, no. 9: 1533. https://doi.org/10.3390/su9091533