Controlling factors for sorption of carbon dioxide for low rank coals

Abstract

As carbon dioxide (CO2) is the most significant greenhouse gas, lowering its emissions is critical. One technique of reduction is to capture CO2 that is released into the environment and store it in suitable disposal areas such as coal layers. The purpose of laboratory-scale CO2 sorption research is to develop ECBM (Enhanced Coal Bed Methane Recovery) technologies that solve CO2 storage while improving CBM exploitation efficiency. Understanding the adsorption-desorption mechanism and sorption hysteresis is crucial. CO2 storage in coal seams is discussed on this page. Currently, extensive research into coal CO2 sorption is undertaken. Previous studies investigated the regulating parameters of CO2 hysteresis for coal. The sample condition, moisture, maximum pressure, and coal properties, including rank, were all screened. These variables are influenced by the temperature and pressure in the subsurface conditions in coal at sub- and supercritical temperatures (33.1 °C) and pressures (7.4 MPa), as well as the moisture content. Also, because it is belonging to the hydroxyl group of the coal molecules of brown coal, the calorific value has given importance to the sorption value. Sorption kinetics are affected by coal matrix compaction. The combined effects of sub- and supercritical temperatures have been observed in the laboratory.