<abstract xmlns="http://www.w3.org/1999/xhtml">

The accuracy of supercritical CO2 sorption determination on coal is important for estimating the CO2 sequestration potential of coal bed using CO2 injection into deep unminable coal seams. Based on the CO2 density change and CO2 sorption data of three selected coal samples, this paper investigates the effect of pressure-sensor accuracy on measurements of CO2 adsorption isotherms on coals with manometric equipment. The characteristic density-change of CO2 in proper pressure range determines a greater influence of pressure error on CO2 adsorption data on coal. The sensor accuracy has significant influence on Excess sorption increment of CO2 on coal in medium pressure (7-12 MPa), and on CO2 Excess-sorption isotherm at medium-and high pressure. The medium pressures with a greater CO2 density-change at a constant temperature in the sample cell are probably inevitable. A lower experiment-temperature will results in a greater measurement error of the sorption caused by pressure sensor accuracy. The pressure sensor accuracy may result in the less reproducibility and repeatability of CO2 adsorption on coals at medium- and high pressure, and negative sorption increment and even negative adsorption
</abstract>

The accuracy of supercritical CO2 sorption determination on coal is important for estimating the CO2 sequestration potential of coal bed using CO2 injection into deep unminable coal seams. Based on the CO2 density change and CO2 sorption data of three selected coal samples, this paper investigates the effect of pressure-sensor accuracy on measurements of CO2 adsorption isotherms on coals with manometric equipment. The characteristic density-change of CO2 in proper pressure range determines a greater influence of pressure error on CO2 adsorption data on coal. The sensor accuracy has significant influence on Excess sorption increment of CO2 on coal in medium pressure (7-12 MPa), and on CO2 Excess-sorption isotherm at medium-and high pressure. The medium pressures with a greater CO2 density-change at a constant temperature in the sample cell are probably inevitable. A lower experiment-temperature will results in a greater measurement error of the sorption caused by pressure sensor accuracy. The pressure sensor accuracy may result in the less reproducibility and repeatability of CO2 adsorption on coals at medium- and high pressure, and negative sorption increment and even negative adsorption

Errors of Manometric Co2 Sorption Experiments On Coal Caused By Accuracy Of Pressure Sensor

International Journal on Smart Sensing and Intelligent Systems

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Errors of Manometric Co Sorption Experiments On Coal Caused By Accuracy Of Pressure Sensor

The accuracy of supercritical CO2 sorption determination on coal is important for estimating the CO2 sequestration potential of coal bed using CO2 injection...

Errors of Manometric Co₂ Sorption Experiments On Coal Caused By Accuracy Of Pressure Sensor

Data publikacji: 01 cze 2016

Zakres stron: 468 - 490

Otrzymano: 18 gru 2015

Przyjęty: 09 kwi 2016

DOI: https://doi.org/10.21307/ijssis-2017-879

Słowa kluczowe
Pressure sensors, Measurement errors, Carbon dioxide, Sorption, Coal, Experimental uncertainty, Pressure effects, Manometers

© 2016 Jiang Renxia et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Errors of Manometric Co2 Sorption Experiments On Coal Caused By Accuracy Of Pressure Sensor

Data publikacji: 01 cze 2016

Zakres stron: 468 - 490

Otrzymano: 18 gru 2015

Przyjęty: 09 kwi 2016

DOI: https://doi.org/10.21307/ijssis-2017-879

Słowa kluczowePressure sensors, Measurement errors, Carbon dioxide, Sorption, Coal, Experimental uncertainty, Pressure effects, Manometers

© 2016 Jiang Renxia et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Errors of Manometric Co₂ Sorption Experiments On Coal Caused By Accuracy Of Pressure Sensor

Słowa kluczowe
Pressure sensors, Measurement errors, Carbon dioxide, Sorption, Coal, Experimental uncertainty, Pressure effects, Manometers