Thermal methods involve heating coal in the presence of water at elevated temperatures and pressures?
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Thermal methods involving heating coal in the presence of water at elevated temperatures and pressures have been studied extensively. One study investigated the operational performance of a high pressure, high temperature pilot-scale oxy-fuel combustor, where pulverized coal was combusted at pressures up to 14 bar and temperatures up to 1600°C . Another study compared the thermal kinetics of water-immersed coal and raw coal, finding that water-immersed coal had significantly lower activation energies for self-heating and spontaneous combustion . Additionally, the contact angles between CO2, water, and coal were measured to understand the efficiency of CO2 sequestration in coal seams, with results showing that CO2-wetting of wet coals increased with pressure . The chemical and physical properties of coal were also found to be influenced by water adsorption, particularly the oxygen functional groups and expandable minerals . Finally, the effect of water on the thermal response of coal during self-heating was investigated, with moisture hindering the formation of stabilized radicals and encouraging faster oxidation .
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85 Citations | The answer to the query is not present in the provided paper. The paper discusses the role of moisture in the self-heating of low-rank coals, but it does not mention thermal methods involving heating coal in the presence of water at elevated temperatures and pressures. |
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50 Citations | The provided paper does not mention anything about thermal methods involving heating coal in the presence of water at elevated temperatures and pressures. |
26 Citations | The paper does not mention the use of thermal methods involving heating coal in the presence of water at elevated temperatures and pressures. |
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