ISOTHERM AND SORPTION MECHANISM OF AMMONIA ADSORPTION ON CAA ZEOLITE (M-34)
Keywords:
adsorption, adsorbent, pressure, isotherm, free energy, microcalorimeter, ammonia.Abstract
This paper presents the values of ammonia adsorption isotherms on synthetic zeolite CaA (M-34), obtained experimentally at a temperature of 303 K. The adsorption isotherm was measured with high accuracy and stability using a system consisting of a differential automatic microcalorimeter of the Tiana-Calve DAK-1-1A type, connected to a universal high-vacuum installation. Differential values of free energy, that is Gibbs energy, were calculated from the equilibrium values of pressure. Based on the general equation of the volume theory of micropores (VMOT), the coefficients of the mathematical apparatus of the isotherm were determined from the values of the Gibbs energy. On zeolite CaA (M-34), a regular relationship was established between the adsorption value and the energy properties of the sorption of ammonia molecules, the sorption mechanisms and the regularity of filling the zeolite volume with ammonia molecules.
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References
Baerlocher C., McCusker L.B., Olson D.H. “Atlas of Zeolite Framework Types”, 6th edn., Elsevier, Amsterdam, 2007: р.399.
Ergashev O., Bakhronov Kh., Akhmedova N., Abdullayeva Sh., Khalilov S.and Kholikov K. “Calorimetric study of methanol adsorption in LiZSM-5 and CsZSM-5 zeolites”.E3S Web of Conferences 401, 02023 (2023), https://doi.org/10.1051/e3sconf/202340102023
Bakhronov Kh., Ergashev O., Sultonov A., Kholmedov H., Ganievand A., Asfandiyorov M. “Basic thermodynamic characteristics and isotherm of ammonia adsorption in NaZSM-5 and LiZSM-5 zeolites”. E3S Web of Conferences 401, 02025 (2023), https://doi.org/10.1051/e3sconf/202340102025
Abdulkhaev T., Nuridinov O., Bakhronov Kh. “Differential heats of orta-xylene in zeolite AgZSM-5”. E-Global Congress Hosted online from Dubai, U.A.E., E-Conference; 2023: рр.120-122.
Abdulkhaev T., Kuldasheva Sh., Bakhronov Kh., Ganiev A. “Enthalpy and the mechanism of water adsorption in zeolite Ag ZSM-5”. International Conference on Developments in Education Hosted from Saint Petersburg. -Russia; 2023: pp.81-84,
Esonkulova N., Ahkmadov M., Bakhronov Kh. “Isotherm adsorption of toluene and zeolite Cu2+ ZSM-5”. International Conference on Developments in Education Hosted from Delhi. -India; 2023: pp.49-52, https://econferencezone.org/index.php/ecz/article/view/2137
Esonkulova N., Kh.Bakhronov, Absalyamova I., Ahkmadov M. “Entropy and thermokinetics of toluene adsorption on Cu2+ ZSM-5 zeolite”. International Conference on Developments in Education Hosted from Bursa. -Turkey; 2023: pp.40-44, https://econferencezone.org/index.php/ecz/article/view/2137
Kokharov M., Rakhmatkarieva F., Bakhronov Kh Rakhmatullaeva M., Absalyamova I., Karimov Y. “Differential entropy and thermokinetics of ammonia molecule adsorption on CaA zeolite (M-22)”. E3S Web of Conferences 2024. –PP. 01024
Koxxarov M, Sobirzhonova S, Asfandiyorov M. Isotherm of ammonia adsorption in zeolite CaA (M-22) E Global Congress 2023. №12. –PP.67-72
Kokharov M., Rakhmatkarieva F., Bakhronov Kh. “Isotherm of ammonia adsorption in Zeolite CaA (M-22)”. Scientific and Technical Journal of Namangan Institute of Engineering and Technology 2023 8(4). –PP. 105-111.
Bakhronov Kh, Ergashev O, Esonkulova N, Asfandiyorov M, Аkhmadov M, Absalyamova I.“Determination of the inhibitory efficiency of the inhibitor synthesized based on maleic anhydride by the electrochemical method”. Scientific and Technical Journal of Namangan Institute of Engineering and Technology 2024, 9(2): рр. 95-101.
Бахронов Х, Султонов , Асфандиёров М. “Дифференциальные теплоты адсорбции аммиака на силикалите с катионами Nа+ и Li+”. Conferencea 2023.-С.108-110
Abdulkhaev T, Kuldasheva Sh., Asfandiyorov M. “Moral differential entropy of adsorption orta-xylene in zeolite Ag ZSM-5”. E Conference Zone; 2023, -P. 68-71.
