The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam

Li Dong; Zhang Xuemei; Hao Jingyuan; Ma Qinghua

doi:doi:10.11648/j.ajche.20210906.12

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The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam

Li Dong, Zhang Xuemei, Hao Jingyuan, Ma Qinghua

Published in American Journal of Chemical Engineering (Volume 9, Issue 6)

Received: 28 October 2021 Accepted: 15 November 2021 Published: 23 November 2021

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Abstract

In order to study the adsorption thermodynamics of coal seam, a series of isothermal adsorption experimental data, in 30°C to 100°C temperature range, 0.0MPa to 32.0MPa pressure range, 0.0 cm³/g to 35 cm³/g adsorbed amounts range, of long flame coal, fat coal, lean coal and meager coal are transformed into the isosteric adsorption data through a temperature-Pressure-Adsorption equation. Both the small percentage values of the relative average error and the agreement between the measured points and the TPAE surfaces have proved the TPAE can accurately represent the series of isothermal adsorption experiments. The enthalpy of the gas adsorption process is calculated by the indefinite integral of Clausius-Clapeyron equation. The concept and calculation method of unit isosteric adsorption enthalpy (IAE) is presented. The adsorption process of the coal is an exothermic process because the lnP vs 1/T plot is a straight line with a negative slope. The phenomenon of unit IAE being decreased with the increasing of adsorption amount indicates that the energy in-homogeneity on the coal surface. Since the adsorption process of the coal is an exothermic process, adsorption always occurs first at higher energy and more active positions in order to release more energy and to make the system more stable. The higher rank coal has a larger unit IAE, and there must be a larger adsorption capacity.

Published in	American Journal of Chemical Engineering (Volume 9, Issue 6)
DOI	10.11648/j.ajche.20210906.12
Page(s)	141-146
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Clausius-Clapeyron Equation, Temperature-Pressure-Adsorption Equation, Isosteric Adsorption Enthalpy, Unit IAE, Coal Rank

References

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[2]	ZHAO Zhigen, TANG Xiuyi, ZHANG Guangming. Experiment and significance of iso-thermal adsorption of coal on methane under higher temperature [J]. Coal Geology & Exploration, 2001, 29 (4): 29-31.
[3]	ZHANG Tianjun, XU Hongjie, LI Shugang, et al. The effect of temperature on the adsorbing capability of coal [J]. JOURNAL OF CHINA COAL SOCIETY, 2009, 34 (6): 802-805.
[4]	FU Xuehai, QIN Yong, QUAN Biao, et al. Study of Physical and Numerical Simulations of Adsorption Methane Content on Middle rank Coal [J]. ACTA GEOLOGICA SINICA, 2008, 82 (10): 1368-1371.
[5]	MA Dongmin, ZHANG Suian, LIN Yabing. Isothermal adsorption and desorption experiment of coal and experimental results accuracy fitting [J]. Journal of China Coal Society, 2011, 36 (3): 476-480.
[6]	ZHANG Qun, SANG Shuxun. Characteristics of Coal Seam Adsorption and Mechanism of Gas Storage [M]. Science Publish House, 2013, page 94.
[7]	YANG Feng, NING Zhengfu, LIU Huiqing, et al. Isothermal adsorption of methane on gas shales [J]. Special oil and gas reservoir, 2013, 20 (5): 133-136.
[8]	LI Xiaorong, BU Lingbing, ZHANG Jianfeng. Calculation and analysis of adsorption heat of adsorbent [J]. Low temperature and specialty gases, 2014, 32 (3): 14-16.
[9]	YIN Shuai, SHAN Yuming, ZHENG Lianhui, et al. Research of shale gas isothermal adsorption quantity and equal amount adsorption heat [J]. Science Technology and Engineering, 2013, 13 (29): 8572-8578.
[10]	LI Dong, HAO Jingyuan. Temperature-pressure-permeability equation of gas separation in inorganic membrane and its application on adsorption [J]. Membrane Science and Technology, 2018, 38 (4): 127-131.
[11]	LI Dong. Mathematical Analysis of Anthracite's Adsorption under Variable Temperature and Pressure [J]. China Coalbed Methane, 2017, 14 (2): 30-35.
[12]	MIAO Zekai, LI Dong, WANG Zheng. Study on absorption behavior of coalbed gas under 17 variable temperature and pressure conditions [J]. Goal Quality Technology, 2017, (3): 25-28.
[13]	LI Dong, ZHANG Xuemei, HAO Jingyuan, MA Qinghua. Feasibility study of coalbed methane content test based on adsorption approved [J]. Coal Science and Technology, 2018, 46 (9): 27-31.
[14]	LI Dong, HAO Jingyuan, ZHANG Xuemei, MA Qinghua. Thermodynamic Characteristi cs of Adsorption of Cuijiagou Coal [J]. Low Temperature and Specialty Gases, 2018, 36 (1): 16-19.
[15]	ZHANG Xuemei, LI Dong. Prediction of adsorption capacity of coal bed methane under variable temperature and pressure [J]. Chemical Industry and Engineering Progress, 2018, 37 (S1): 63-66.
[16]	LI Dong, HAO Jingyuan, ZHANG Xuemei, MA Qinghua. To Establish and Calculate the Regression Sample Set for Temperature-Pressure-Adsorption Equation—Taking Shaanxi Jiaoping Cuijiagou Coal as An Example [J]. Unconven-tional Oil & Gas, 2018, 5 (2): 46-49.
[17]	Hao Jingyuan, Li Dong, Zhang Xuemei, et al. Study on Coal Methane Adsorption Behavior Under Variation Temperature and Pressure-Taking Xia-Yu-Kou Coal for Example [J]. International Journal of Oil, Gas and Coal Engineering. Vol. 6, No. 4, 2018, pp. 60-66.

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APA Style

Li Dong, Zhang Xuemei, Hao Jingyuan, Ma Qinghua. (2021). The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam. American Journal of Chemical Engineering, 9(6), 141-146. https://doi.org/10.11648/j.ajche.20210906.12

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ACS Style

Li Dong; Zhang Xuemei; Hao Jingyuan; Ma Qinghua. The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam. Am. J. Chem. Eng. 2021, 9(6), 141-146. doi: 10.11648/j.ajche.20210906.12

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AMA Style

Li Dong, Zhang Xuemei, Hao Jingyuan, Ma Qinghua. The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam. Am J Chem Eng. 2021;9(6):141-146. doi: 10.11648/j.ajche.20210906.12

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@article{10.11648/j.ajche.20210906.12,
  author = {Li Dong and Zhang Xuemei and Hao Jingyuan and Ma Qinghua},
  title = {The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam},
  journal = {American Journal of Chemical Engineering},
  volume = {9},
  number = {6},
  pages = {141-146},
  doi = {10.11648/j.ajche.20210906.12},
  url = {https://doi.org/10.11648/j.ajche.20210906.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajche.20210906.12},
  abstract = {In order to study the adsorption thermodynamics of coal seam, a series of isothermal adsorption experimental data, in 30°C to 100°C temperature range, 0.0MPa to 32.0MPa pressure range, 0.0 cm3/g to 35 cm3/g adsorbed amounts range, of long flame coal, fat coal, lean coal and meager coal are transformed into the isosteric adsorption data through a temperature-Pressure-Adsorption equation. Both the small percentage values of the relative average error and the agreement between the measured points and the TPAE surfaces have proved the TPAE can accurately represent the series of isothermal adsorption experiments. The enthalpy of the gas adsorption process is calculated by the indefinite integral of Clausius-Clapeyron equation. The concept and calculation method of unit isosteric adsorption enthalpy (IAE) is presented. The adsorption process of the coal is an exothermic process because the lnP vs 1/T plot is a straight line with a negative slope. The phenomenon of unit IAE being decreased with the increasing of adsorption amount indicates that the energy in-homogeneity on the coal surface. Since the adsorption process of the coal is an exothermic process, adsorption always occurs first at higher energy and more active positions in order to release more energy and to make the system more stable. The higher rank coal has a larger unit IAE, and there must be a larger adsorption capacity.},
 year = {2021}
}

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TY  - JOUR
T1  - The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam
AU  - Li Dong
AU  - Zhang Xuemei
AU  - Hao Jingyuan
AU  - Ma Qinghua
Y1  - 2021/11/23
PY  - 2021
N1  - https://doi.org/10.11648/j.ajche.20210906.12
DO  - 10.11648/j.ajche.20210906.12
T2  - American Journal of Chemical Engineering
JF  - American Journal of Chemical Engineering
JO  - American Journal of Chemical Engineering
SP  - 141
EP  - 146
PB  - Science Publishing Group
SN  - 2330-8613
UR  - https://doi.org/10.11648/j.ajche.20210906.12
AB  - In order to study the adsorption thermodynamics of coal seam, a series of isothermal adsorption experimental data, in 30°C to 100°C temperature range, 0.0MPa to 32.0MPa pressure range, 0.0 cm3/g to 35 cm3/g adsorbed amounts range, of long flame coal, fat coal, lean coal and meager coal are transformed into the isosteric adsorption data through a temperature-Pressure-Adsorption equation. Both the small percentage values of the relative average error and the agreement between the measured points and the TPAE surfaces have proved the TPAE can accurately represent the series of isothermal adsorption experiments. The enthalpy of the gas adsorption process is calculated by the indefinite integral of Clausius-Clapeyron equation. The concept and calculation method of unit isosteric adsorption enthalpy (IAE) is presented. The adsorption process of the coal is an exothermic process because the lnP vs 1/T plot is a straight line with a negative slope. The phenomenon of unit IAE being decreased with the increasing of adsorption amount indicates that the energy in-homogeneity on the coal surface. Since the adsorption process of the coal is an exothermic process, adsorption always occurs first at higher energy and more active positions in order to release more energy and to make the system more stable. The higher rank coal has a larger unit IAE, and there must be a larger adsorption capacity.
VL  - 9
IS  - 6
ER  -

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Author Information

Li Dong

Energy & Chemical Engineering Research Center, Xi’an Siyuan University, Xi’an, China
Zhang Xuemei

Energy & Chemical Engineering Research Center, Xi’an Siyuan University, Xi’an, China
Hao Jingyuan

Energy & Chemical Engineering Research Center, Xi’an Siyuan University, Xi’an, China
Ma Qinghua

Energy & Chemical Engineering Research Center, Xi’an Siyuan University, Xi’an, China

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Plain Text BibTeX RIS

APA Style

Li Dong, Zhang Xuemei, Hao Jingyuan, Ma Qinghua. (2021). The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam. American Journal of Chemical Engineering, 9(6), 141-146. https://doi.org/10.11648/j.ajche.20210906.12

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ACS Style

Li Dong; Zhang Xuemei; Hao Jingyuan; Ma Qinghua. The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam. Am. J. Chem. Eng. 2021, 9(6), 141-146. doi: 10.11648/j.ajche.20210906.12

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AMA Style

Li Dong, Zhang Xuemei, Hao Jingyuan, Ma Qinghua. The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam. Am J Chem Eng. 2021;9(6):141-146. doi: 10.11648/j.ajche.20210906.12

Copy | Download

@article{10.11648/j.ajche.20210906.12,
  author = {Li Dong and Zhang Xuemei and Hao Jingyuan and Ma Qinghua},
  title = {The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam},
  journal = {American Journal of Chemical Engineering},
  volume = {9},
  number = {6},
  pages = {141-146},
  doi = {10.11648/j.ajche.20210906.12},
  url = {https://doi.org/10.11648/j.ajche.20210906.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajche.20210906.12},
  abstract = {In order to study the adsorption thermodynamics of coal seam, a series of isothermal adsorption experimental data, in 30°C to 100°C temperature range, 0.0MPa to 32.0MPa pressure range, 0.0 cm3/g to 35 cm3/g adsorbed amounts range, of long flame coal, fat coal, lean coal and meager coal are transformed into the isosteric adsorption data through a temperature-Pressure-Adsorption equation. Both the small percentage values of the relative average error and the agreement between the measured points and the TPAE surfaces have proved the TPAE can accurately represent the series of isothermal adsorption experiments. The enthalpy of the gas adsorption process is calculated by the indefinite integral of Clausius-Clapeyron equation. The concept and calculation method of unit isosteric adsorption enthalpy (IAE) is presented. The adsorption process of the coal is an exothermic process because the lnP vs 1/T plot is a straight line with a negative slope. The phenomenon of unit IAE being decreased with the increasing of adsorption amount indicates that the energy in-homogeneity on the coal surface. Since the adsorption process of the coal is an exothermic process, adsorption always occurs first at higher energy and more active positions in order to release more energy and to make the system more stable. The higher rank coal has a larger unit IAE, and there must be a larger adsorption capacity.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - The Application of Temperature-Pressure-Adsorption Equation in the Adsorption Thermodynamic of Coal Seam
AU  - Li Dong
AU  - Zhang Xuemei
AU  - Hao Jingyuan
AU  - Ma Qinghua
Y1  - 2021/11/23
PY  - 2021
N1  - https://doi.org/10.11648/j.ajche.20210906.12
DO  - 10.11648/j.ajche.20210906.12
T2  - American Journal of Chemical Engineering
JF  - American Journal of Chemical Engineering
JO  - American Journal of Chemical Engineering
SP  - 141
EP  - 146
PB  - Science Publishing Group
SN  - 2330-8613
UR  - https://doi.org/10.11648/j.ajche.20210906.12
AB  - In order to study the adsorption thermodynamics of coal seam, a series of isothermal adsorption experimental data, in 30°C to 100°C temperature range, 0.0MPa to 32.0MPa pressure range, 0.0 cm3/g to 35 cm3/g adsorbed amounts range, of long flame coal, fat coal, lean coal and meager coal are transformed into the isosteric adsorption data through a temperature-Pressure-Adsorption equation. Both the small percentage values of the relative average error and the agreement between the measured points and the TPAE surfaces have proved the TPAE can accurately represent the series of isothermal adsorption experiments. The enthalpy of the gas adsorption process is calculated by the indefinite integral of Clausius-Clapeyron equation. The concept and calculation method of unit isosteric adsorption enthalpy (IAE) is presented. The adsorption process of the coal is an exothermic process because the lnP vs 1/T plot is a straight line with a negative slope. The phenomenon of unit IAE being decreased with the increasing of adsorption amount indicates that the energy in-homogeneity on the coal surface. Since the adsorption process of the coal is an exothermic process, adsorption always occurs first at higher energy and more active positions in order to release more energy and to make the system more stable. The higher rank coal has a larger unit IAE, and there must be a larger adsorption capacity.
VL  - 9
IS  - 6
ER  -

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