title: Carbon dioxide sorption capacities of coal gasification residues.
abstract: Underground coal gasification is currently being considered as an economically and environmentally sustainable option for development and utilization of coal deposits not mineable by conventional methods. This emerging technology in combination with carbon capture and sorptive CO2 storage on the residual coke as well as free-gas CO2 storage in the cavities generated in the coal seams after gasification could provide a relevant contribution to the development of Clean Coal Technologies. Three hard coals of different rank from German mining districts were gasified in a laboratory-scale reactor (200 g of coal at 800 °C subjected to 10 L/min air for 200 min). High-pressure CO2 excess sorption isotherms determined before and after gasification revealed an increase of sorption capacity by up to 42%. Thus, physical sorption represents a feasible option for CO2 storage in underground gasification cavities.
authors.affiliation: German Research Centre for Geosciences (GFZ), Helmholtz Centre Potsdam, Telegrafenberg, 14473 Potsdam, Germany. kempka@gfz-potsdam.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Kempka
authors.forename: Tomás
authors.initials: T
authors.lastname: Fernández-Steeger
authors.forename: Dong-Yong
authors.initials: DY
authors.lastname: Li
authors.forename: Marc
authors.initials: M
authors.lastname: Schulten
authors.forename: Ralph
authors.initials: R
authors.lastname: Schlüter
authors.forename: Bernhard M
authors.initials: BM
authors.lastname: Krooss
mesh_terms: D000388:Air; D000397:Air Pollution / Q000517:prevention & control; D002244:Carbon; D002245:Carbon Dioxide; D003031:Coal / Q000145:classification*; D003077:Coke; D004784:Environmental Monitoring; D005740:Gases; D008906:Mining; D013696:Temperature
chemical_list: D003031:Coal; D003077:Coke; D005740:Gases; D002245:Carbon Dioxide; D002244:Carbon