By a News Reporter-Staff News Editor at Journal of Mathematics -- A new study on Alkanes - Methane is now available. According to news reporting out of Xuzhou, People’s Republic of China, by VerticalNews editors, research stated, “Accurate methane gas adsorption capacity estimation is key for the coalbed methane (CBM) reservoir gas-in-place assessment. As in situ, the reservoir pressure and temperature vary from one location to another.”

Financial supporters for this research include National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province, Scientific Research Foundation of the Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education (China University of Mining and Technology), Research and Innovation Project for College Graduates of Jiangsu Province.

Our news journalists obtained a quote from the research from the China University of Mining and Technology, “The temperature induced gas sorption capacity evaluation is important for the CBM and mining industry. In this study, grand canonical Monte Carlo (GCMC) simulation was used to investigate temperature effect on methane adsorption capacity and adsorbed methane density for different sized pores. Methane adsorption experiments were performed to show realistic temperature effect on methane adsorption capacity and the experimental data were used directly to validate the numerical model. The pore structure of coal was characterized by high-pressure mercury injection, low-pressure N-2 gas adsorption, low-pressure CO2 gas adsorption. The simulation results revealed that, first, temperature influence on methane adsorption was more obvious in smaller pores than that in larger pores. Based on the characteristics of the temperature influence on methane adsorption, pores can be divided into three categories: 0.7-0.9 nm pores, 1.0-1.3 nm pores and pores larger than 1.4 nm. In the 0.7-0.9 nm group, methane adsorption capacity decreased by approximately 19% at 3 MPa from 20 degrees C to 100 degrees C. In contrast, in the 1.0-1.3 nm pores and pores larger than 1.4 nm, methane adsorption capacity decreased by approximately 32% and 45%. Second, in 0.7 nm and 1.0 nm pores, methane adsorption capacity decreased linearly with an increase in temperature. In 4.0 nm pores methane adsorption capacity exhibited a negative exponential decrease with increasing temperature at low pressure (<3 MPa). Third, when the pore size was the same, the temperature effect was more obvious at a lower pressure than that at a higher pressure. The experimental results indicated that methane adsorption capacity in the coal sample decreased linearly with temperature increasing, and temperature effect on reducing methane adsorption capacity was greater at low pressure. These experimental results were consistent with the simulation results.”

According to the news editors, the research concluded: “Based on simulation and experimental data, it was obvious that temperature-induced gas adsorption capacity variation was both pore size dependent and pressure dependent.”

For more information on this research see: Temperature effect on gas adsorption capacity in different sized pores of coal: Experiment and numerical modeling. Journal of Petroleum Science and Engineering , 2018;165():821-830. Journal of Petroleum Science and Engineering can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Petroleum Science and Engineering - http://www.journals.elsevier.com/journal-of-petroleum-science-and-engineering/)

Our news journalists report that additional information may be obtained by contacting Y.M. Zhu, China Univ Min & Technol, Sch Resources & Geosci, Xuzhou, People’s Republic of China. Additional authors for this research include Y. Liu, S.M. Liu, W. Li and X. Tang.

The direct object identifier (DOI) for that additional information is: https://doi.org/10.1016/j.petrol.2018.03.021. This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.

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CITATION: (2018-05-08), Researchers at China University of Mining and Technology Have Reported New Data on Methane (Temperature effect on gas adsorption capacity in different sized pores of coal: Experiment and numerical modeling), Journal of Mathematics, 659, ISSN: 1945-8746, BUTTER® ID: 015644450

From the newsletter Journal of Mathematics.
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