Spray Water Reactivation/Pelletization of Spent CaO-based Sorbent from Calcium Looping Cycles

被引：87
|
作者：
Manovic, Vasilije [1 ]
Wu, Yinghai [1 ]
He, Ian [1 ]
Anthony, Edward J. [1 ]
机构：
[1] Nat Resources Canada, CanmetENERGY, Ottawa, ON K1A 1M1, Canada
来源：
ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2012年 / 46卷 / 22期
关键词：
CO2; CAPTURE; FLUIDIZED-BED; STEAM REACTIVATION; CARBONATION; CALCINATION; LIMESTONES; COMBUSTION; ATTRITION; SULFATION; CAPACITY;
D O I：
10.1021/es303252j
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This paper presents a novel method for reactivation of spent CaO-based sorbents from calcium looping (CaL) cycles for CO2 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 CO2. This improved CO2 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.
引用
收藏
页码：12720 / 12725
页数：6
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