Carbon dioxide adsorption in Brazilian coals

摘要: Carbon dioxide (CO{sub 2}) is one of the most important greenhouse gases. In period between 1980 and 1998, CO{sub 2} emissions increased more than 21% projections suggest that will continue to increase globally by 2.2% 2000 2020 3.3% in developed countries. The sequestration deep unminable coal beds promising several methods geological are currently being investigated. can adsorb onto coal, there studies demonstrating dissolves coals swells them. At very low pressures (P {lt} 1 bar), dissolution does not seem be a problem; however, high necessary for {gt} 50 bar). this study, we evaluated kinetics equilibrium sorption on Brazilian at pressures. adsorption isotherm room temperature (30{sup o}C) was measured through static method. results showed Freundlich model or Langmuir suitable describe experimental results. capacity range 0.089-0.186 mmol 2}/g, whichmore » typical values with ash content. dynamics fixed-bed column contains granular (particle sizes 0.8, 2.4, 4.8 mm) rate fast mathematical column. linear driving force (LDF) used mass-transfer constants LDF (K{sub s}) 1.0-2.0 min{sup -1}. 29 refs., 5 figs., 3 tabs.« less