Authors: E.B. Gafarova, V.B. Melnikov

Title of the article: Comparative analysis of key process indicators adsorption drying in production liquefied natural gas

Year: 2022, Issue: 2, Pages: 31-41

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

Index UDK: 661.183; 66.074.31

DOI: 10.26730/1999-4125-2022-2-31-41

Abstract: The article presents the results of the technological calculation of the schemes used with two and three adsorbers of the process of drying natural gas before liquefaction in the production of liquefied natural gas for five different adsorbents of domestic manufacturers. The purpose of this calculation is to minimize the cost of drying gas and to identify the most efficient use of the properties of the adsorbent and the optimal technological scheme of this process. For each of these cases, the required amount of adsorbent was calculated, the main dimensions of the apparatus that ensure the operation of the process, the calculation of the consumption of regeneration and cooling gas, heat costs, and so on. Based on the results of the calculation, a comparative analysis was carried out on the main indicators of the process and further calculation was carried out when replacing the three-cylinder scheme of the installation with a two-cylinder one using NaX zeolite without binder, which also showed higher efficiency when using a two-cylinder scheme. As a result of the study, it was revealed that today the domestic industry has developed and is developing efficiently working dehumidifiers that allow achieving the required moisture dew point value for gas coming from the adsorption dehydration unit for the production of liquefied natural gas. These adsorbents can serve as an equivalent replacement for foreign adsorbents used at many domestic plants in the preparation of gas for liquefaction.

Key words: liquefied natural gas LNG adsorption gas dehydration zeolites technological schemes

Receiving date: 19.11.2021

Approval date: 30.03.2022

Publication date: 29.04.2022

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