Studies of Water-Vapour Adsorption Dynamics of High-Efficiency Desiccant Based on Aluminium Oxide and NaX Zeolite
Abstract
:1. Introduction
2. Experimental Section
2.1. Synthesis of Al2O3 Adsorbent
2.2. NaX Adsorbent
2.3. Adsorbents Test
- the air was supplied to the flowmass-controller (1), the rotameter (P1), the manometer (M1); the air consumption could vary in the range from 0 to 15,000 L/h.
- the saturator (2) represented a vertical cylinder apparatus with a diameter of 100 mm and a height of 1000 mm. The air was supplied through the tube with holes of 1 mm in diameter. Attachments (Rashig rings) were loaded into the saturator and water was poured; volumes varied depending on the experimental conditions;
- the mist separator (3) represented a vertical cylindrical apparatus with a diameter of 85 mm and a height of 800 mm. The humidified air was supplied through the tube;
- the manometer (M2) was used to control the absence of the excessive pressure in the system.
- the adsorber (4) represented a vertical cylindrical apparatus with a diameter of 50 mm, a height of 800 mm and a volume of 2 L. A required volume of the sorbent was loaded in it. An air distribution grill was installed on the bottom flange. A thermocouple pocket (a 5-mm diameter tube welded at one end) was coaxially placed inside the adsorber. The dry air was discharged into the atmosphere through the valve (B3) and the rotameter (P3). The manometer (M3) controlled the excessive pressure.
- the valve (B1) was attached to the exit nozzle (4) of the adsorber. It was used for sampling when measuring the parameters of the humidified air at the exit from the adsorber;
- the rotameter (P2) was used to control the air consumption, which changed in the range from 0% to 100% of the scale;
- the hygrometer (5) measured the parameters of the ingoing air;
- the thermocouple (T1) and the personal computer were used to control the temperature of heating of the adsorbent layer;
- the valve (B2) was intended for sampling when measuring the parameters of the humidified air at the entrance to the adsorber;
- the valve (B3) was applied to create excessive pressure in the system.
3. Results and Discussion
3.1. Analysis of Influence of Diffusion Resistance
3.2. Effect of Layer Height on the Adsorption Characteristics of the Samples Al2O3 and NaX
3.3. Data on the Influence of the Pressure on the Adsorption Characteristics of the Samples Al2O3 and NaX
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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No. of Experiment | Adsorbent Volume, L | Layer Height, cm | Water Content, g/m3 | Minimal Td.p. oC | DC, g/100 cm3 |
---|---|---|---|---|---|
Al2O3 | |||||
1 | 0.3 | 15.3 | 15.07 | −59.5 | 3.77 |
2 | 0.6 | 30.6 | 15.11 | −55.5 | 6.9 |
3 | 0.9 | 46.0 | 15.91 | −60.9 | 9.5 |
4 | 0.9 | 46.0 | 14.94 | −65.3 | 7.55 |
5 | 1.2 | 61.0 | 15.6 | −60.1 | 11.31 |
NaX | |||||
6 | 0.3 | 15.3 | 14.67 | −49.3 | 3.3 |
7 | 0.6 | 30.6 | 14.72 | −48.7 | 8.53 |
8 | 0.6 | 30.6 | 15.2 | −60.2 | 9.13 |
9 | 0.9 | 46.0 | 14.57 | −60.9 | 11.66 |
10 | 1.2 | 61.0 | 15.38 | −60.5 | 12.17 |
No. of Experiment | P, MPa | Minimal Td.p., °C | DC | Adsorbent Type |
---|---|---|---|---|
g/100 g | ||||
1 | 0.1 | −55.5 | 7.83 | Al2O3 |
2 | 0.2 | −57.8 | 14.12 | |
3 | 0.3 | −65.0 | 18.73 | |
4 | 0.4 | −59.0 | 19.15 | |
5 | 0.5 | −59.9 | 19.18 | |
6 | 0.6 | −60.2 | 19.30 | |
7 | 0.1 | −48.7 | 14.79 | NaX |
8 | 0.2 | −60.5 | 21.11 | |
9 | 0.3 | −59.1 | 23.09 | |
10 | 0.5 | −63.2 | 19.46 | |
11 | 0.6 | −60.4 | 16.95 |
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Meshcheryakov, E.; Kozlov, M.; Reshetnikov, S.; Isupova, L.; Livanova, A.; Kurzina, I. Studies of Water-Vapour Adsorption Dynamics of High-Efficiency Desiccant Based on Aluminium Oxide and NaX Zeolite. Appl. Sci. 2020, 10, 5320. https://doi.org/10.3390/app10155320
Meshcheryakov E, Kozlov M, Reshetnikov S, Isupova L, Livanova A, Kurzina I. Studies of Water-Vapour Adsorption Dynamics of High-Efficiency Desiccant Based on Aluminium Oxide and NaX Zeolite. Applied Sciences. 2020; 10(15):5320. https://doi.org/10.3390/app10155320
Chicago/Turabian StyleMeshcheryakov, Eugene, Maxim Kozlov, Sergey Reshetnikov, Lyubov Isupova, Alesia Livanova, and Irina Kurzina. 2020. "Studies of Water-Vapour Adsorption Dynamics of High-Efficiency Desiccant Based on Aluminium Oxide and NaX Zeolite" Applied Sciences 10, no. 15: 5320. https://doi.org/10.3390/app10155320