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Solid fuels in chemical-looping combustion using a NiO-based oxygen carrier

Henrik Leion (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Anders Lyngfelt (Institutionen för energi och miljö, Energiteknik) ; Tobias Mattisson (Institutionen för energi och miljö, Energiteknik)
Chemical Engineering Research and Design (0263-8762). Vol. 87 (2009), 11, p. 1543-1550.
[Artikel, refereegranskad vetenskaplig]

The feasibility of using three different solid fuels in chemical-looping combustion (CLC) has been investigated using NiO as oxygen carrier. A laboratory fluidized-bed reactor system for solid fuel was used, simulating a chemical-looping combustion system by exposing the sample to alternating reducing and oxidizing conditions. In each reducing phase 0.2 g of fuel was added to the reactor containing 20 g oxygen carrier. The experiments were performed at 970°C. Compared to previously published results with other oxygen carriers the reactivity of the used Ni-particles was considerably lower for the high-sulphur fuel and higher for the low-sulphur fuel. Much more unconverted CO was released and the fuel conversion was much slower for high-sulphur fuel such as petroleum coke, suggesting that the nickel-based oxygen carrier was deactivated by the presence of sulphur. The NiO particles also showed good reactivity with methane and a syngas mixture of 50% H2 and 50% CO. For all experiments the oxygen carrier showed good fluidizing properties without any signs of agglomeration.

Nyckelord: Chemical-looping combustion; CO2-capture; Coal; Fluidized bed; Nickel oxide; Oxygen carrier; Petroleum coke



Denna post skapades 2010-01-18. Senast ändrad 2016-08-22.
CPL Pubid: 108551

 

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Institutioner (Chalmers)

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

Ämnesområden

Kemiteknik

Chalmers infrastruktur