Authors: E.B. Gafarova, V.B. Melnikov, E.B. Fedorova, N.P. Makarova

Title of the article: Comparative studies of dynamic adsorption activity of domestic and foreign zeolites

Year: 2024, Issue: 5, Pages: 65-73

Branch of knowledge: 2.6.12. Chemical technology of fuel and high-energy substances

Index UDK: 661.183; 66.074.31

DOI: 10.26730/1999-4125-2024-5-65-73

Abstract: The article presents the results of comparative studies of the dynamic adsorption activity of domestic and foreign industrial zeolite-type adsorbents for deep drying of natural gas in the production of LNG and other processes requiring a similar degree of drying. Domestic and foreign zeolite-type adsorbents of the NaХ-BS, 13Х (BASF), NaА-BS and 4А (BASF) brands were studied under dynamic gas drying conditions. The gas used was methane and air saturated with moisture (as a model gas). As a result of the studies, it was found that in the studied temperature range and volumetric velocities of the gas being dried, NaA-BS exhibits the highest dynamic adsorption activity in drying air and methane. The stability of the dynamic adsorption activity of adsorbents was studied in 70 adsorption-regeneration cycles in air-drying. It has been established that with increasing adsorption-regeneration cycles, the dynamic activity of all adsorbents decreases. It has been established that NaA-BS has the maximum value of the protective action time of the adsorbent layer. The results obtained by the authors show that domestically produced zeolites are not inferior to their foreign analogues in terms of adsorption characteristics, and are somewhat superior to them. The research results make it possible to use domestic adsorbents for the purpose of import substitution in the deep drying of natural gas in the production of LNG and other processes requiring a similar degree of drying.

Key words: liquefied natural gas adsorption drying zeolites dynamic activity gas moisture content import substitution

Receiving date: 08.07.2024

Approval date: 29.09.2024

Publication date: 24.10.2024

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