TY - JOUR

T1 - Possibility of Calculating the Dynamics of Thermal Desorption of Hydrocarbons from a Coal Fiber Sorbent

AU - Kudryashova, O. B.

AU - Gruznov, V. M.

AU - Baldin, M. N.

N1 - The study was performed within the framework of the government assignment of the Ministry of Science and Higher Education of the Russian Federation, project no. FUFE 2021-005 (Institute for Problems of Chemical and Energetic Technologies, Siberian Branch, Russian Academy of Sciences) and within the framework of the Basic Research Program of the Russian Federation, project no. FWZZ-2022-0027 (Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences). Публикация для корректировки.

PY - 2023/2

Y1 - 2023/2

N2 - Geochemical survey based on registration of hydrocarbons that migrate from a deposit to the Earth’s surface is a promising method of searching for hydrocarbon deposits. Passive concentrators containing a sorbent are used for this purpose. Passive concentrators are glass or metal tubes packed with a sorbent. The sorbents are materials that have sufficient sorption capacity for the gases under consideration and are capable of reversible desorption. After the sorbent exposure in sampling sites (pits), the samples are analyzed with a gas chromatograph. The topical problem is determination of the time required for complete desorption of the gases (saturated С1–С5 hydrocarbons) from the sorbent at the preset temperature. A mathematical model of the thermal desorption of hydrocarbons from a coal fiber sorbent is suggested. The mass exchange processes are described using the linear driving force (LDF) model taking into account significant dependence of the desorption coefficient on the temperature and sorbent porosity. The model novelty consists in taking into account the structure of the coal sorbent fibers. The temperature dependences of the desorption coefficient and of the gas diffusion coefficient in the sorbent are described by the Arrhenius law. Analytical dependences were obtained for estimating the desorption time as a function of the physicochemical characteristics of the hydrocarbons and temperature. Model calculations based on the published data were performed for the methane desorption from the coal sorbent. The model parameters requiring experimental determination, primarily the activation energy of the gas desorption, were revealed. The results of the study can be used in the field of coal mining for improving the methods of searching for hydrocarbon deposits.

AB - Geochemical survey based on registration of hydrocarbons that migrate from a deposit to the Earth’s surface is a promising method of searching for hydrocarbon deposits. Passive concentrators containing a sorbent are used for this purpose. Passive concentrators are glass or metal tubes packed with a sorbent. The sorbents are materials that have sufficient sorption capacity for the gases under consideration and are capable of reversible desorption. After the sorbent exposure in sampling sites (pits), the samples are analyzed with a gas chromatograph. The topical problem is determination of the time required for complete desorption of the gases (saturated С1–С5 hydrocarbons) from the sorbent at the preset temperature. A mathematical model of the thermal desorption of hydrocarbons from a coal fiber sorbent is suggested. The mass exchange processes are described using the linear driving force (LDF) model taking into account significant dependence of the desorption coefficient on the temperature and sorbent porosity. The model novelty consists in taking into account the structure of the coal sorbent fibers. The temperature dependences of the desorption coefficient and of the gas diffusion coefficient in the sorbent are described by the Arrhenius law. Analytical dependences were obtained for estimating the desorption time as a function of the physicochemical characteristics of the hydrocarbons and temperature. Model calculations based on the published data were performed for the methane desorption from the coal sorbent. The model parameters requiring experimental determination, primarily the activation energy of the gas desorption, were revealed. The results of the study can be used in the field of coal mining for improving the methods of searching for hydrocarbon deposits.

KW - geochemical survey

KW - hydrocarbons

KW - passive concentrators

KW - search for oil and gas deposits

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85179658052&origin=inward&txGid=d5b520350b816d804e2fb519f7263b2b

UR - https://www.mendeley.com/catalogue/fd21ee77-ef1f-329d-95e6-c01ff2824f24/

U2 - 10.1134/S1070427223020119

DO - 10.1134/S1070427223020119

M3 - Article

VL - 96

SP - 205

EP - 210

JO - Russian Journal of Applied Chemistry

JF - Russian Journal of Applied Chemistry

SN - 1070-4272

IS - 2

ER -