Calculating Coefficients of the Gas Hydrate Distribution of CO2 and H2S when Removing Them from a Methane-Containing Gas Mixture

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Abstract

A study is performed of the effect process temperature and pressure have on the distribution of CO2 and H2S gas hydrate in a model methane-containing gas mixture of CH4 (89.00 mol %)–CO2 (5.00 mol %)–n-C4H10 (3.00 mol %)–N2 (2.00 mol %)–H2S (1.00 mol %) containing components of natural gas. Modeling is done at low (4.00 MPa) and high (8.00 MPa) pressures in the 272.15–278.15 K range of temperatures. The temperature dependences of the coefficients of the gas hydrate distribution of natural gas components are shown to differ. The maximum coefficients of the gas hydrate distribution of CO2 and H2S are 1.24 and 31.83, respectively, at a process temperature of 272.15 K and a pressure of 8.00 MPa. It is found that n-C4H10 in natural gas lowers the coefficient of the gas hydrate distribution of CO2. It is concluded that natural gas deposits with low contents of n-C4H10 must be used to effectively concentrate CO2 in the gas hydrate phase.

About the authors

M. S. Kudryavtseva

Alekseev State Technical University; Lobachevsky State University

Email: kudryavtseva.m.s@yandex.ru
603950, Nizhny Novgorod, Russia; 603022, Nizhny Novgorod, Russia

A. N. Petukhov

Lobachevsky State University; Mendeleev University of Chemical Technology

Email: kudryavtseva.m.s@yandex.ru
603022, Nizhny Novgorod, Russia; 125047, Moscow, Russia

D. N. Shablykin

Lobachevsky State University

Email: kudryavtseva.m.s@yandex.ru
603022, Nizhny Novgorod, Russia

E. A. Stepanova

Lobachevsky State University; Mendeleev University of Chemical Technology

Email: kudryavtseva.m.s@yandex.ru
603022, Nizhny Novgorod, Russia; 125047, Moscow, Russia

V. M. Vorotyntsev

Lobachevsky State University

Author for correspondence.
Email: kudryavtseva.m.s@yandex.ru
603022, Nizhny Novgorod, Russia

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Copyright (c) 2023 М.С. Кудрявцева, А.Н. Петухов, Д.Н. Шаблыкин, Е.А. Степанова, В.М. Воротынцев