title: Spray water reactivation/pelletization of spent CaO-based sorbent from calcium looping cycles.
abstract: This paper presents a novel method for reactivation of spent CaO-based sorbents from calcium looping (CaL) cycles for CO(2) capture. A spent Cadomin limestone-derived sorbent sample from a pilot-scale fluidized bed (FBC) CaL reactor is used for reactivation. The calcined sorbent is sprayed by water in a pelletization vessel. This reactivation method produces pellets ready to be used in FBC reactors. Moreover, this procedure enables the addition of calcium aluminate cement to further enhance sorbent strength. The characterization of reactivated material by nitrogen physisorption (BET, BJH) and scanning electron microscopy (SEM) confirmed the enhanced morphology of sorbent particles for reaction with CO(2). This improved CO(2) carrying capacity was demonstrated in calcination/carbonation tests performed in a thermogravimetric analyzer (TGA). Finally, the resulting pellets displayed a high resistance to attrition during fluidization in a bubbling bed.
authors.affiliation: CanmetENERGY, Natural Resources Canada, 1 Haanel Drive, Ottawa, Ontario, Canada K1A 1M1.
authors.forename: Vasilije
authors.initials: V
authors.lastname: Manovic
authors.forename: Yinghai
authors.initials: Y
authors.lastname: Wu
authors.forename: Ian
authors.initials: I
authors.lastname: He
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Anthony
mesh_terms: D000327:Adsorption; D017607:Aluminum Compounds / Q000737:chemistry*; D002119:Calcium Carbonate / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry; D003252:Construction Materials / Q000032:analysis*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006358:Hot Temperature; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry*; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D010087:Oxides; D014867:Water; C035219:calcium aluminate; D002245:Carbon Dioxide; C016538:lime; D002119:Calcium Carbonate