Reactivation of calcium-based sorbent by water hydration for CO2 capture

Calcium looping is an emerging CO2 capture technology in which CO2 is captured at high temperature using a calcium-based sorbent, which however suffers from a well-known problem of loss-in-capacity after a few cycles. Water hydration is a potential method that can be applied to reactivate the sorbent on-site. The present work confirmed the effectiveness of periodic water hydration on the reactivation of a limestone and a synthetic CaO/cement sorbent. Furthermore, it was found that the water hydration of calcined limestone was independent of the factors, such as particle size, hydration duration, hydration temperature, and pre-calcination temperature. Also the conversion of hydrated limestone cannot be further enhanced by ultrasonic hydration. In contrast, the synthetic CaO/cement sorbent showed strong dependence on those factors. In addition, the CaO conversion of the synthetic CaO/cement sorbent can be recovered to more than 80% by ultrasonic hydration.

[1]  Robert H. Borgwardt,et al.  Sintering of nascent calcium oxide , 1989 .

[2]  John R. Grace,et al.  Investigation of Attempts to Improve Cyclic CO2 Capture by Sorbent Hydration and Modification , 2008 .

[3]  P. Salatino,et al.  An assessment of water and steam reactivation of a fluidized bed spent sorbent for enhanced SO2 capture , 2008 .

[4]  Changsui Zhao,et al.  CO2 Capture Using CaO Modified with Ethanol/Water Solution during Cyclic Calcination/Carbonation , 2008 .

[5]  Xiaoping Chen,et al.  CO2 uptake of modified calcium-based sorbents in a pressurized carbonation–calcination looping , 2011 .

[6]  Ningsheng Cai,et al.  Synthesis, experimental studies, and analysis of a new calcium-based carbon dioxide absorbent , 2005 .

[7]  E. J. Anthony,et al.  CO2 Capture from Simulated Syngas via Cyclic Carbonation/Calcination for a Naturally Occurring Limestone: Pilot-Plant Testing , 2009 .

[8]  B. Singh,et al.  Hydration of mixtures of C12A7 and granulated blastfurnace slag , 1989 .

[9]  A. Majumdar,et al.  The hydration of 12CaO.7A12O3 at different temperatures , 1988 .

[10]  Minghou Xu,et al.  Performance Enhancement of Calcium Oxide Sorbents for Cyclic CO2 Capture—A Review , 2012 .

[11]  Vasilije Manovic,et al.  Steam reactivation of spent CaO-based sorbent for multiple CO2 capture cycles. , 2007, Environmental science & technology.

[12]  Jinsheng Wang,et al.  The Hydration Behavior of Partially Sulfated Fluidized Bed Combustor Sorbent , 2005 .

[13]  F. Steward,et al.  Reactivation of partially‐sulphated limestone particles from a cfb combustor by hydration , 1994 .

[14]  Changsui Zhao,et al.  Enhancement of reactivity in surfactant-modified sorbent for CO 2 capture in pressurized carbonation , 2011 .

[15]  L. Jia,et al.  The enhancement of hydration of fluidized bed combustion ash by sonication. , 2002, Environmental Science and Technology.

[16]  R. H. Borgwardt.  Calcination kinetics and surface area of dispersed limestone particles , 1985 .

[17]  P. Salatino,et al.  Reactivation by Water Hydration of Spent Sorbent for Fluidized-Bed Combustion Application: Influence of Hydration Time , 2004 .

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

[19]  H. Hosono,et al.  Thermodynamics and Kinetics of Hydroxide Ion Formation in 12CaO·7Al2O3 , 2005 .

[20]  Xin Guo,et al.  CO2 capture of limestone modified by hydration–dehydration technology for carbonation/calcination looping , 2011 .

[21]  W. Whitman,et al.  The Hydration of Lime , 1926 .

[22]  Robin W. Hughes,et al.  Improved Long-Term Conversion of Limestone-Derived Sorbents for In Situ Capture of CO2 in a Fluidized Bed Combustor , 2004 .

[23]  Vasilije Manovic,et al.  Reactivation and remaking of calcium aluminate pellets for CO2 capture , 2011 .

[24]  Changsui Zhao,et al.  CO2 capture and attrition performance of CaO pellets with aluminate cement under pressurized carbonation , 2012 .

[25]  P. Salatino,et al.  Enhancement of Sulfur Uptake by Hydration of Spent Limestone for Fluidized-Bed Combustion Application , 2001 .

[26]  A. Luz,et al.  CaCO3 addition effect on the hydration and mechanical strength evolution of calcium aluminate cement for endodontic applications , 2012 .

[27]  Yu-yu Huang,et al.  Effect of Preparation Temperature on Cyclic CO2 Capture and Multiple Carbonation−Calcination Cycles for a New Ca-Based CO2 Sorbent , 2006 .

[28]  Bo Feng,et al.  High-Temperature Pressure Swing Adsorption Process for CO2 Separation , 2012 .

[29]  Yin Wang,et al.  Experimental study on CO2 capture conditions of a fluidized bed limestone decomposition reactor , 2010 .

[30]  John F. Davidson,et al.  The Effects of Repeated Cycles of Calcination and Carbonation on a Variety of Different Limestones, as Measured in a Hot Fluidized Bed of Sand , 2007 .

[31]  E. Rubin,et al.  Sorbent Cost and Performance in CO2 Capture Systems , 2004 .

[32]  Robin W. Hughes,et al.  Design, Process Simulation, and Construction of an Atmospheric Dual Fluidized Bed Combustion System for In Situ CO2 Capture Using High-temperature Sorbents , 2005 .