Solid fuels in chemical-looping combustion using a NiO-based oxygen carrier
Artikel i vetenskaplig tidskrift, 2009

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.

Oxygen carrier

CO2-capture

Coal

Nickel oxide

Fluidized bed

Chemical-looping combustion

Petroleum coke

Författare

Henrik Leion

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Anders Lyngfelt

Chalmers, Energi och miljö, Energiteknik

Tobias Mattisson

Chalmers, Energi och miljö, Energiteknik

Chemical Engineering Research and Design

0263-8762 (ISSN) 1744-3563 (eISSN)

Vol. 87 1543-1550

Ämneskategorier

Kemiteknik

DOI

10.1016/j.cherd.2009.04.003