Chemical Looping Combustion and Chemical Looping with Oxygen Uncoupling Experiments in a Batch Reactor Using Spray-Dried CaMn1–xMxO3−δ (M = Ti, Fe, Mg) Particles as Oxygen Carriers
Journal article, 2013

Chemical looping combustion and chemical looping with oxygen uncoupling (CLOU) with oxygen carrier particles consisting of CaMn1-xMxO3-delta (M = Ti, Fe, Mg) has been studied by consecutive oxidation and reduction experiments in a fluidized-bed batch reactor. The examined particles were produced by spray drying, and all did show a significant release of gas-phase oxygen to the inert atmosphere at 900 and 1000 degrees C. All particles also provided very high reactivity with syngas and methane. Some of the examined particles showed unfavorable fluidization characteristics, i.e., they formed dust during operation or showed agglomeration or defluidization tendencies. The crushing strength of the particles that formed dust was typically <1.2 N. The desired perovskite structure was detected in all samples by X-ray diffractometry. The materials that included iron and titanium had these elements incorporated in the perovskite structure, substituting manganese. When magnesium had been included, it was not incorporated into the crystal structure; instead, it was present as a separate phase of MgO. In addition to a perovskite phase, most samples also contained small amounts of marokite (CaMn2O4). Particles doped with MgO calcined at 1300 degrees C showed good fluidization behavior, as well as particularly high reactivity with fuel.

perovskites

system

camno3-delta

clc

fluidized-bed

Author

Peter Hallberg

Chalmers, Energy and Environment, Energy Technology

Dazheng Jing

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Magnus Rydén

Chalmers, Energy and Environment, Energy Technology

Tobias Mattisson

Chalmers, Energy and Environment, Energy Technology

Anders Lyngfelt

Chalmers, Energy and Environment, Energy Technology

Energy & Fuels

0887-0624 (ISSN) 1520-5029 (eISSN)

Vol. 27 3 1473-1481

Innovative Oxygen Carriers Uplifting chemical-looping combustion (INNOCUOUS)

European Commission (FP7), 2010-10-01 -- 2015-04-30.

Subject Categories

Energy Engineering

DOI

10.1021/ef3013618

More information

Created

10/7/2017