Metal impregnation on steel converter slag as an oxygen carrier
Artikel i vetenskaplig tidskrift, 2023
the inorganic matter of the fuel. It is therefore expected that the lifetime of the oxygen carrier is limited,
and preferably low-cost oxygen carriers should be used. Oxygen carriers based on iron ore or steel
manufacturing waste products are available in significant quantities at low cost. However, it is common
for these types of materials that their reactivity is low. This study investigates the effect of adding small
amounts of more reactive elements into steel converter slag, also called LD slag. Slag particles were
wet impregnated with 2 or 5 wt.% of Ni, Cu, Mn, or Ce. The new material’s morphology was evaluated
using X-Ray Diffraction and SEM-EDS. Changes in reactivity towards CO, CH4 and the model tar
molecule benzene were evaluated using a bench-scale laboratory fluidized bed reactor. It was
observed that even small amounts of either Ni, Cu, or Mn could increase reactivity toward CO. Both Cu
and Mn formed phases with LD slag that released oxygen via CLOU (chemical looping with oxygen
uncoupling) and increased the conversion of methane and benzene. Ni and Ce doping also increased
methane conversion but had only a minor effect on the benzene conversion.
steel converter slag
oxygen carrier
impregnation
Författare
Fredrik Hildor
Chalmers, Kemi och kemiteknik, Energi och material
Tobias Mattisson
Chalmers, Rymd-, geo- och miljövetenskap, Energiteknik
Carl Johan Linderholm
Chalmers, Rymd-, geo- och miljövetenskap, Energiteknik
Henrik Leion
Chalmers, Kemi och kemiteknik, Energi och material
Greenhouse Gases: Science and Technology
21523878 (eISSN)
Vol. 13Ämneskategorier
Kemiska processer
Bioenergi
Metallurgi och metalliska material
DOI
10.1002/ghg.2202