CAJ | 학술논문

针对循环次数、吸收剂粒径的大小、碳酸化气氛中CO2的浓度、煅烧气氛中CO2的浓度和水蒸气的浓度对于钙基吸收剂循环煅烧/碳酸化反应特性的影响,在钙基吸收剂循环煅烧/碳酸化反应实验装置上进行实验研究。结果表明：钙基吸收剂碳酸化阶段的转化率在循环煅烧/碳酸化反应中存在衰减现象,10次循环反应之后,转化率会从72%降至30%以下；吸收剂碳酸化阶段的转化率随其粒径的增大而减小；碳酸化气氛中CO2浓度的提高,会抑制钙基吸收剂碳酸化阶段转化率的衰减；煅烧气氛中CO2浓度的增加会加速钙基吸收剂碳酸化阶段转化率的衰减,导致循环捕集CO2性能锐减；水蒸气能降低固体产物扩散的能量壁垒,延长碳酸化反应时间,提高转化率。
침대순배차수、흡수제립경적대소、탄산화기분중CO2적농도、단소기분중CO2적농도화수증기적농도대우개기흡수제순배단소/탄산화반응특성적영향,재개기흡수제순배단소/탄산화반응실험장치상진행실험연구。결과표명：개기흡수제탄산화계단적전화솔재순배단소/탄산화반응중존재쇠감현상,10차순배반응지후,전화솔회종72%강지30%이하；흡수제탄산화계단적전화솔수기립경적증대이감소；탄산화기분중CO2농도적제고,회억제개기흡수제탄산화계단전화솔적쇠감；단소기분중CO2농도적증가회가속개기흡수제탄산화계단전화솔적쇠감,도치순배포집CO2성능예감；수증기능강저고체산물확산적능량벽루,연장탄산화반응시간,제고전화솔。
Aiming at the effects of cycle number,absorbent particle size,CO2 concentration in calcinations,carbonation atmosphere and water vapour concentration on characteristics of cyclic calcination/carbonation reaction of Ca-based absorbent,they are investigated experimentally on a lab-scale setup. The results show that the carbonation conversion of Ca-based absorbent decreases from 72% to 30% after 10 cycles in the calcination/carbonation reaction. The small particle size can improve the carbonation conversion of absorbent. The increase of CO2 concentration in carbonation atmosphere can restrain the decrease of conversion rate in carbonation process. The increase of CO2 concentration in calcination atmosphere can accelerate the decrease of the conversion rate in carbonation conversion process,which results in the decrease of cycle performance for CO2 capture. Water vapour reduces the energy barrier of the diffusion across the solid production,which prolongs carbonation reaction time and increases conversion rate.