2024-03-29T11:56:55Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/112212018-11-15T12:08:17Zcom_10261_101com_10261_5com_10261_84col_10261_354col_10261_337
Retention of arsenic and selenium compounds present in coal combustion and gasification flue gases using activated carbons
López Antón, María Antonia
Díaz Somoano, Mercedes
García Fierro, José Luis
Martínez Tarazona, María Rosa
Activated carbon
Arsenic
Coal combustion
Coal gasification
Selenium
7 pages, 7 figures, 6 tables.-- Printed version published Aug 2007.
The emission of potentially toxic compounds of arsenic and selenium present in flue gases from coal combustion and gasification processes has led to the need for gas cleaning systems capable of reducing their content. This work is focused on the capture of these elements in activated carbons which have proven to have good retention capacities for mercury compounds in gas phase. Two commercial activated carbons (Norit RBHG3 and Norit RB3) and a carbon prepared via activation of a pyrolysed coal (CA) were tested in simulated coal combustion and gasification atmospheres in a laboratory scale reactor. Arsenic and selenium compounds were retained to different extents on these carbons, retention efficiency depending mainly on the speciation of the element, which in turn depends on the gas atmosphere. Arsenic retention was similar in both combustion and gasification atmospheres unlike selenium retention. Moreover the retention of arsenic was lower than that of selenium.
This work was carried out with the financial support of ECSC (7220-ED/095). We are also grateful to our colleagues in ICB (CSIC) R. Juan and C. Ruiz who prepared the CA activated carbon and Amelia Martínez Alonso of INCAR who assisted us in the textural characterization.
Peer reviewed
2009-03-04T12:48:27Z
2009-03-04T12:48:27Z
2007-05-09
artículo
http://purl.org/coar/resource_type/c_6501
Fuel Processing Technology 88(8): 799-805 (2007)
0378-3820
http://hdl.handle.net/10261/11221
10.1016/j.fuproc.2007.03.005
en
http://dx.doi.org/10.1016/j.fuproc.2007.03.005
open
22195 bytes
application/pdf
Elsevier