Experimental Validation of the Calcium Looping CO2 Capture Process with Two Circulating Fluidized Bed Carbonator Reactors

Postcombustion CO2 capture using CaO as a regenerable solid sorbent in a circulating fluidized bed (CFB) carbonator is emerging as a promising CO2 capture technology. Experimental validation of this concept is provided through a comparative analysis of the results obtained in two laboratory-scale dual fluidized bed (DFB) installations located at INCAR-CSIC (Spain) and IFK (Germany). The analysis is focused on the performance of the CFB carbonator reactors operated with continuous solid circulation of CaO. A reasonable closure of the carbon balances (i) between the CO2 that has disappeared from the gas phase, (ii) the CaCO3 circulating between the reactors, and (iii) the CaCO3 that is formed within the carbonator bed has been established. A necessary condition for the capture of a given molar flow of CO2 is experimentally demonstrated and requires that a slightly overstoichiometric molar flow of active CaO is supplied to the carbonator. The deactivation behavior of the sorbents during continuous looping co...

[1]  Ajay R. Bidwe,et al.  Parametric investigation of the calcium looping process for CO2 capture in a 10kWth dual fluidized bed , 2010 .

[2]  Craig Hawthorne,et al.  CO2 capture with CaO in a 200 kWth dual fluidized bed pilot plant , 2011 .

[3]  Juan Carlos Abanades,et al.  Comparison of experimental results from three dual fluidized bed test facilities capturing CO2 with CaO , 2011 .

[4]  Anders Lyngfelt,et al.  Design and Fluid Dynamic Analysis of a Bench-Scale Combustion System with CO2 Separation−Chemical-Looping Combustion , 2005 .

[5]  J. C. Abanades,et al.  Modelling of a fluidized bed carbonator reactor to capture CO2 from a combustion flue gas , 2009 .

[6]  Hermann Hofbauer,et al.  Hydrodynamics of a dual fluidized-bed gasifier—Part I: simulation of a riser with gas injection and diffuser , 2003 .

[7]  J. C. Abanades,et al.  Heat requirements in a calciner of CaCO3 integrated in a CO2 capture system using CaO , 2008 .

[8]  Paul S. Fennell,et al.  The calcium looping cycle for large-scale CO2 capture , 2010 .

[9]  Mónica Alonso,et al.  Sulfation of CaO Particles in a Carbonation/Calcination Loop to Capture CO2 , 2008 .

[10]  Vasilije Manovic,et al.  Carbonation of CaO-Based Sorbents Enhanced by Steam Addition , 2010 .

[11]  Craig Hawthorne,et al.  Hydrodynamic analysis of a 10 kWth Calcium Looping Dual Fluidized Bed for post-combustion CO2 capture , 2010 .

[12]  Mónica Alonso,et al.  Reactivity of highly cycled particles of CaO in a carbonation/calcination loop , 2008 .

[13]  A. Sánchez-Biezma,et al.  Postcombustion CO2 capture with CaO. Status of the technology and next steps towards large scale demonstration , 2011 .

[14]  Juan Carlos Abanades,et al.  Average activity of CaO particles in a calcium looping system , 2010 .

[15]  Mónica Alonso,et al.  Sorbent attrition in a carbonation/calcination pilot plant for capturing CO2 from flue gases , 2010 .

[16]  J. C. Abanades,et al.  Carbon dioxide capture from combustion flue gases with a calcium oxide chemical loop. Experimental results and process development , 2010 .

[17]  E. Anthony.  Solid looping cycles: A new technology for coal conversion , 2008 .

[18]  J. C. Abanades,et al.  Cost structure of a postcombustion CO2 capture system using CaO. , 2007, Environmental science & technology.

[19]  G. P. Curran,et al.  Carbon dioxide-acceptor (coal) gasification process. Studies of acceptor properties. [Process discussed in light of required properties of CaO acceptor; limestones and dolomites are equally useful in process] , 1967 .

[20]  Hermann Hofbauer,et al.  H2 rich product gas by steam gasification of biomass with in situ CO2 absorption in a dual fluidized bed system of 8 MW fuel input , 2009 .

[21]  Panagiotis Grammelis,et al.  An advanced EMMS scheme for the prediction of drag coefficient under a 1.2 MWth CFBC isothermal flow—Part II: Numerical implementation , 2010 .

[22]  J. C. Abanades,et al.  Conversion Limits in the Reaction of CO2 with Lime , 2003 .

[23]  J. C. Abanades,et al.  Experimental investigation of a circulating fluidized‐bed reactor to capture CO2 with CaO , 2011 .

[24]  E. J. Anthony,et al.  Capture of CO2 from combustion gases in a fluidized bed of CaO , 2004 .

[25]  Mónica Alonso,et al.  Application of the random pore model to the carbonation cyclic reaction , 2009 .

[26]  D. D. Perlmutter,et al.  Effect of the product layer on the kinetics of the CO2‐lime reaction , 1983 .

[27]  Hsiaotao Bi,et al.  Flow regime diagrams for gas-solid fluidization and upward transport , 1995 .