The Effect of Bituminous and Lignite Ash on the Performance of Ilmenite as Oxygen Carrier in Chemical‐Looping Combustion
Journal article, 2013

The influence of ash in chemical-looping combustion (CLC) has been studied in a lab-scale fluidized bed reactor. The oxygen carrier, ilmenite, was investigated with German lignite coal, Chinese bituminous coal, Mexican pet coke, wood char, and methane. Lignite ash and ash from gasified Chinese bituminous coal were compared in this study. Up to 50 wt % and 33.3 wt % loadings of ash from the combustion of lignite and ash from the gasification of coal were added. The gas conversion was clearly affected by the addition of ash, and very similar results were seen both for methane conversion and for CO conversion in the solid fuel tests. Thus, both ashes showed initial decrease in gas conversion with the addition of some ash due to the presence of inert/deactivating material in the ashes. At higher ash loading, a beneficial effect of ash could be seen. Furthermore, no negative effect of ash addition on the fluidizability of the bed material could be seen.

Bituminous coal

Chemical looping combustion

Coal gasification ash

Ilmenite

Author

Muhammad Mufti Azis

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Henrik Leion

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Erik Jerndal

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Britt-Marie Steenari

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Tobias Mattisson

Chalmers, Energy and Environment, Energy Technology

Anders Lyngfelt

Chalmers, Energy and Environment, Energy Technology

Chemical Engineering and Technology

0930-7516 (ISSN) 1521-4125 (eISSN)

Vol. 36 9 1460-1468

Driving Forces

Sustainable development

Areas of Advance

Energy

Subject Categories

Chemical Engineering

DOI

10.1002/ceat.201200608

More information

Created

10/8/2017