Removal of CO2 by CaO/MgO and CaO/Ca9Al6O18 in the Presence of SO2

Sorbents with their components CaO/MgO and CaO/Ca9Al6O18 were produced from calcium d-gluconate monohydrate, magnesium d-gluconate hydrate, and aluminum l-lactate hydrate as precursors with a simple wet mixing method. The effects of sorbents type, mass proportion, SO2 concentration, and calcination temperature on sorbent capability were studied. The results show that CaO/MgO (75:25%, w/w) kept the best CO2-capture capability, while CaO/Ca9Al6O18 (75:25%, w/w) kept the best cyclic stability. The CO2-capture process is drastically blocked when SO2 exists. The CO2-capture capacity drops quickly when the SO2 concentration is promoted. However, the cumulative SO2-capture capacity increases at the same time. The total calcium use rises tenderly after many cycles, and the tendency becomes more obvious with an increasing SO2 concentration. The effect of the calcination temperature on CaO/MgO and CaO/Ca9Al6O18 absorption characteristics shows little difference.

[1]  Edward J. Anthony,et al.  Ca looping technology: current status, developments and future directions , 2011 .

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

[3]  J. S. Dennis,et al.  The rate and extent of uptake of CO2 by a synthetic, CaO-containing sorbent , 2009 .

[4]  Changsui Zhao,et al.  Enhancement of Ca‐Based Sorbent Multicyclic Behavior in Ca Looping Process for CO2 Separation , 2009 .

[5]  Ataullah Khan,et al.  Relationship between Structural Properties and CO2 Capture Performance of CaO-Based Sorbents Obtained from Different Organometallic Precursors , 2008 .

[6]  C. Müller,et al.  Synthetic Ca‐based solid sorbents suitable for capturing CO2 in a fluidized bed , 2008 .

[7]  Liang-Shih Fan,et al.  Utilization of chemical looping strategy in coal gasification processes , 2008 .

[8]  Angeliki A. Lemonidou,et al.  Development of new CaO based sorbent materials for CO2 removal at high temperature , 2008 .

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

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

[11]  Mónica Alonso,et al.  Comparison of CaO-Based Synthetic CO2 Sorbents under Realistic Calcination Conditions , 2007 .

[12]  J. Grace,et al.  Sequential capture of CO2 and SO2 in a pressurized TGA simulating FBC conditions. , 2007, Environmental science & technology.

[13]  E. J. Anthony,et al.  Co-capture of H2S and CO2 in a Pressurized-Gasifier-Based Process , 2007 .

[14]  J. Carlos Abanades,et al.  CO2 Capture Capacity of CaO in Long Series of Carbonation/Calcination Cycles , 2006 .

[15]  Bo Feng,et al.  Overcoming the Problem of Loss-in-Capacity of Calcium Oxide in CO2 Capture , 2006 .

[16]  John R. Grace,et al.  Simultaneous CO2/SO2 Capture Characteristics of Three Limestones in a Fluidized-Bed Reactor , 2006 .

[17]  P. Smirniotis,et al.  Calcium Oxide Based Sorbents for Capture of Carbon Dioxide at High Temperatures , 2006 .

[18]  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 .

[19]  L. Fan,et al.  Carbonation−Calcination Cycle Using High Reactivity Calcium Oxide for Carbon Dioxide Separation from Flue Gas , 2002 .

[20]  M. Aihara,et al.  Development of porous solid reactant for thermal-energy storage and temperature upgrade using carbonation/decarbonation reaction , 2001 .

[21]  John R. Grace,et al.  Removal of CO2 by Calcium-Based Sorbents in the Presence of SO2 , 2007 .