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Adsorption and Desorption Data of H2S Molecules in Water-containing Calcite Nanoslit Structures


LIU Xinrong1,2,3FANG Lei2ZHOU Xiaohan*1,2ZHANG Jilu2Lojain SULIMAN3CHEN HaO2
1 State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China2 School of Civil Engineering,Chongqing University,Chongqing 400045,China3 National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas (Chongqing),Chongqing 400045,China

DOI:10.3974/geodb.2025.08.02.V1

Published:Aug. 2025

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Key Words:

Materials Studio,isothermal adsorption capacity,adsorption energy,adsorption heat,radial distribution function curve,diffusion coefficient

Abstract:

The retention and diffusion characteristics of surface-bound H2S in hydrated calcite cracks directly control its release propensity. We firstly obtained the phase structure of calcite crystals in limestone specimens through indoor experiments, including XRD, XPS, FT-IR and spherical aberration atomic phase, to obtain the content ratio, crystal structure and atomic arrangement characteristics of calcite crystals. Secondly, based on the results of indoor phase test, a slit molecular model of calcite crystal was established in Materials Studio software. Finally, molecular simulation was performed by combining Grand Canonical Monte Carlo (GCMC) and molecular dynamics (MD) to obtain the adsorption and desorption diffusion data of H2S in the calcite slit molecular model. The indoor physical testing was commissioned by the Shiyanjia Laboratory of the Science Compass and completed in Beijing on November 22, 2024. The limestone specimens were collected from the strata near the Yuelongmen Tunnel in Sichuan Province. Numerical simulations were completed at Chongqing University on May 29, 2025. The dataset is consisted of 12 statistic tables, they are: (1) comparison of the number of hydrogen bonds of H₂S and H2O adsorbed in calcite with different water contents (T=313 K) (Tab.1); (2) data points of density distribution of adsorbed H2O and H₂S molecules on the z-axis in 0.5% and 4% calcite nanoslits with P=2 MPa or T=313 K (Tab.2-Tab.5); (3) H₂S isothermal adsorption curves at different temperatures with moisture content of 0.5% or 4% (Tab.6-Tab.7); (4) data points of density distribution of adsorbed H2O and H₂S molecules on the z-axis (T=313 K, P=2 MPa) (Tab.8); (5) H₂S adsorption heat (Tab.9); (6) H₂S isothermal adsorption curves for different moisture contents (Tab.10); (7) molecular simulation results of H2S self-diffusion coefficient in calcite nanopore model with a moisture content of 0.5% or 4% (Tab.11-Tab.12). The dataset is archived in .xlsx format, and consist of one file with data size of 61.5 KB.

Foundation Item:

National Natural Science Foundation of China (52374079); Chongqing Municipal (CSTB2024NSCQ-MSX0195, CYB240036, cstc2024ycih-bgzxm0032)

Data Citation:

LIU Xinrong, FANG Lei, ZHOU Xiaohan*, ZHANG Jilu, Lojain SULIMAN, CHEN HaO. Adsorption and Desorption Data of H2S Molecules in Water-containing Calcite Nanoslit Structures[J/DB/OL]. Digital Journal of Global Change Data Repository, 2025. https://doi.org/10.3974/geodb.2025.08.02.V1.

References:


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Data Product:

ID Data Name Data Size Operation
1 Adsorp&DesorpH2SCalcite.xlsx 61.60KB
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