Compared with raw coal, oxygen absorption of inorganic acid elution samples decreases obviously.
It is found that with the increase of the temperature, the gas concentration of CO2 generated from coal before CO2 absorption, expressed the trend of exponential growth.
Physical adsorption of oxygen on the coal surface; Chemical absorption (chemisorption), which leads to the formation of coal-oxygen complexes and oxygenated carbon-species; Chemical reaction.
Investment costs (CAPEX) and energy requirements of the lean amine circulation pump and absorber blower for variations in the absorber design were compared for two cases: CO2 absorption from a coal-fired power plant, and CO2 absorption from a gas-fired power plant both with a net power output of 400 MWe.
It has been shown that high concentrations of Ga in weathered coal come from the absorption of humic acid (Wang et al. 2011).
According to the absorption theory, coal and gas outburst is not possible to occur because low adsorption capacity causes low gas pressure.
These steps are as what follow (Mohalik et al. 2009; Yuan and Smith 2012): (1) Physical adsorption of oxygen on the coal surface; (2) Chemical absorption (chemisorption), which leads to the formation of coal-oxygen complexes and oxygenated carbon-species; (3) Chemical reaction. .
In order to study the effect of pressure on the water absorption capability of coal, the water injection experiments of two coal samples were done under different pressure source conditions and room temperature by using self-designed pressurized water device.
However, the initial temperature of CO and C2H4 detected firstly during the coal oxidation process after CO2 absorption was obviously lower than that before CO2 absorption, what's more, the concentrations of CO and C2H4 were also obviously lower than that before CO2 absorption at the same temperature, showing an obvious "hysteresis" phenomenon of inhibiting coal oxidation.
The later water absorption curve of coal becomes weaker, and water adsorption process is mainly influenced by capillary force.
