Experimental Investigation of Based Oxygen Carriers Used in Continuous Chemical-Looping Combustion

Three materials of perovskite structure, (M = Mg or Mg and Ti), have been examined as oxygen carriers in continuous operation of chemical-looping combustion (CLC) in a circulating fluidized bed system with the designed fuel power 300 W. Natural gas was used as fuel. All three materials were capable of completely converting the fuel to carbon dioxide and water at 900°C. All materials also showed the ability to release gas phase oxygen when fluidized by inert gas at elevated temperature (700–950°C); that is, they were suitable for chemical looping with oxygen uncoupling (CLOU). Both fuel conversion and oxygen release improved with temperature. All three materials also showed good mechanical integrity, as the fraction of fines collected during experiments was small. These results indicate that the materials are promising oxygen carriers for chemical-looping combustion.

[1]  Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas , 2013 .

[2]  Anders Lyngfelt,et al.  Combined oxides as oxygen-carrier material for chemical-looping with oxygen uncoupling , 2014 .

[3]  Anders Lyngfelt,et al.  Long-term integrity testing of spray-dried particles in a 10-kW chemical-looping combustor using natural gas as fuel , 2009 .

[4]  Liang-Shih Fan,et al.  Chemical Looping Systems for Fossil Energy Conversions , 2010 .

[5]  Tommy Mokkelbost,et al.  Study of inexpensive oxygen carriers for chemical looping combustion , 2011 .

[6]  Anders Lyngfelt,et al.  Use of CaMn0.875Ti0.125O3 as Oxygen Carrier in Chemical-Looping with Oxygen Uncoupling , 2009 .

[7]  Anders Lyngfelt,et al.  Chemical-looping with oxygen uncoupling for combustion of solid fuels , 2009 .

[8]  Anders Lyngfelt,et al.  The use of ilmenite as oxygen carrier with kerosene in a 300W CLC laboratory reactor with continuous circulation , 2012 .

[9]  Anders Lyngfelt,et al.  Chemical-looping combustion and chemical-looping reforming of kerosene in a circulating fluidized-bed 300W laboratory reactor , 2012 .

[10]  Juan Adánez,et al.  Syngas combustion in a chemical-looping combustion system using an impregnated Ni-based oxygen carrier , 2009 .

[11]  Hongguang Jin,et al.  A Novel Chemical-Looping Combustor without NOx Formation , 1996 .

[12]  Magnus Rydén,et al.  Continuous hydrogen production via the steam―iron reaction by chemical looping in a circulating fluidized-bed reactor , 2012 .

[13]  E. J. Anthony,et al.  Carbon capture and storage update , 2014 .

[14]  Hermann Hofbauer,et al.  Operating experience with chemical looping combustion in a 120 kW dual circulating fluidized bed (DCFB) unit , 2009 .

[15]  Anders Lyngfelt,et al.  CaMn0.875Ti0.125O3 as oxygen carrier for chemical-looping combustion with oxygen uncoupling (CLOU)—Experiments in a continuously operating fluidized-bed reactor system , 2011 .

[16]  A. Lyngfelt,et al.  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 , 2013 .

[17]  Juan Adánez,et al.  Progress in chemical-looping combustion and reforming technologies , 2012 .

[18]  Anders Lyngfelt,et al.  Chemical-looping combustion of solid fuels – Status of development , 2014 .

[19]  S. Stølen,et al.  Nonstoichiometry and reductive decomposition of CaMnO3−δ , 2005 .

[20]  Chonghe Li,et al.  Formability of ABO3 perovskites , 2004 .

[21]  R. Ocampo-Pérez,et al.  Adsorption of Fluoride from Water Solution on Bone Char , 2007 .

[22]  Liang-Shih Fan,et al.  Coal direct chemical looping combustion process: Design and operation of a 25-kWth sub-pilot unit , 2013 .