Production and examination of oxygen-carrier materials based on manganese ores and Ca(OH)2 in chemical looping with oxygen uncoupling
Journal article, 2014

This study concerns production of oxygen-carrier particles using six different manganese ores. The ores were made to react with Ca(OH)2 at elevated temperature, forming calcium manganite. The method utilized to manufacture particles was extrusion. Methane and syngas conversion and oxygen release of the samples in inert atmosphere were investigated. The oxygen carrier based on South African (B) manganese ore, showed good methane conversion and was able to transfer oxygen corresponding to 1.5% of its mass during reduction with gaseous fuel. All examined oxygen carriers were capable of converting syngas completely. The ability to release gaseous oxygen was examined by adding wood char in a stream of nitrogen for four selected samples sintered at 1300°C/6 h. These samples released an amount of oxygen corresponding to 0.37–0.68% of their mass. The reactivity of all the ores was improved after the proposed treatments. Reactivity results of the oxygen carrier made from South African (B) ore and Ca(OH)2, sintered at 1300°C for 6 h were the most promising. Attrition measurements with a jet cup of the oxygen carriers sintered at 1300°C/6 h showed that all the samples made from ores were at least three times more resistant to mechanical attrition compared to particles made from synthetic Mn2O3. Producing feasible oxygen carriers directly from ores could potentially cut the cost of chemical looping with oxygen uncoupling and have a significant impact on its competitiveness among other carbon capture technologies.

manganese ore

chemical looping with oxygen uncoupling

oxygen carrier

calcium manganate

chemical-looping combustion

CO2 capture

Author

Nasim Mohammad Pour

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Golnar Azimi

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Henrik Leion

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Magnus Rydén

Chalmers, Energy and Environment, Energy Technology

Anders Lyngfelt

Chalmers, Energy and Environment, Energy Technology

AICHE Journal

0001-1541 (ISSN) 1547-5905 (eISSN)

Vol. 60 2 645-656

Novel combustion principle with inherent capture of CO2 using combined manganese oxides that release oxygen (NOCO2)

European Commission (EC) (EC/FP7/291235), 2012-03-01 -- 2017-02-28.

Driving Forces

Sustainable development

Areas of Advance

Energy

Subject Categories

Other Chemical Engineering

DOI

10.1002/aic.14273

More information

Created

10/7/2017