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Solid fuels in chemical-looping combustion using oxide scale and unprocessed iron ore as oxygen carriers

Henrik Leion (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Erik Jerndal (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Britt-Marie Steenari (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Simon Hermansson ; Mikael Israelsson ; Erik Jansson ; Martin Johnsson ; Rebecka Thunberg ; Albin Vadenbo ; Tobias Mattisson (Institutionen för energi och miljö, Energiteknik) ; Anders Lyngfelt (Institutionen för energi och miljö, Energiteknik)
Fuel (0016-2361). Vol. 88 (2009), 10, p. 1945-1954.
[Artikel, refereegranskad vetenskaplig]

Chemical-looping combustion (CLC) is a novel technology that can be used to meet demands on energy production without CO2 emissions. The CLC-process includes two reactors, an air and a fuel reactor. Between these two reactors oxygen is transported by an oxygen carrier, which most often is a metal oxide. This arrangement prevents mixing of N2 from the air with CO2 from the combustion. The combustion gases consist almost entirely of CO2 and H2O. Therefore, the technique reduces the energy penalty that normally arises from the separation of CO2 from other flue gases, hence, CLC may make capture of CO2 cheaper. Iron ore and oxide scale from steel production were tested as oxygen carriers in CLC batch experiments with solid fuels. Petroleum coke, charcoal, lignite and two bituminous coals were used as fuels. The experiments were carried out in a laboratory fluidized-bed reactor that was operating cyclically with alternating oxidation and reduction phases. The exhaust gases were led to an analyzer where the contents of CO2, CO, CH4 and O2 were measured. Gas samples collected in bags were used to analyze the content of hydrogen in a gas chromatograph. The results showed that both the iron ore and the oxide scale worked well as oxygen carrier and both oxygen carriers increased their reactivity with time.

Nyckelord: CO2-capture; Chemical-looping combustion; Oxygen carrier; Fluidized-bed; Iron oxide



Denna post skapades 2009-09-04. Senast ändrad 2016-04-28.
CPL Pubid: 97314

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)
Institutionen för energi och miljö, Energiteknik

Ämnesområden

Oorganisk kemi
Kemisk energiteknik

Chalmers infrastruktur