学术
摘 要:
利用钙基吸收剂的循环煅烧／碳酸化反应（CCR）吸收CO2的方法是一种新型、廉价的分离CO2方法．在常压煅烧／碳酸化反应器系统上，研究了随循环反应次数N的变化碳酸化温度TCAR、煅烧温度TCAL、颗粒粒径d、碳酸化气氛中CO2浓度CCO2等因素对石灰石和白云石的CCR循环吸收CO2过程中碳酸化转化率XN的影响．结果表明：常压下TCAR对吸收剂的碳酸化反应影响较大，在700℃时石灰石的XN最高，白云石则在650℃时的XN最高．TCAR在650～700℃时有利于钙基吸收剂的碳酸化反应．当TCAL超过1050℃时，与920℃时相比较，石灰石的XN急剧下降，而高对白云石则影响不大．随粒径的增大，石灰石的XN逐渐减小，而白云石则存在最佳的粒径分布使XN最大．在碳酸化气氛中，高浓度CO2有利于碳酸化反应的进行．[著者文摘]
文章出处:
《动力工程》-2008年28卷1期 -117-121页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-6761（2008）01-0117-05
Experimental Study Based on Calcium-based Absorbent Cyclic Reaction （CCR） for CO2-Capture
LI Ying-jie, ZHAO Chang-sui （MOE＇S Key Lab of Coal Power Generation and Combustion Technology of Southeast University, Nanjing 210096, China）
Abstract:
The process of calcium-based absorbent cyclic calcination/carbonation reaction for CO2-capture is a new-style and low-cost approach for CO2 separation. In a calcination/carbonation reactor system at atmospheric pressure and under variable cyclic number N, the effect of operating parameters including carbonation temperature （ TeAR ）, calcination temperature （ TCAI. ）, particle diameter （d）, and COz concentration in carbonation atmosphere （CCO2） on conversion ratio of carbonation XN were experimentally investigated in both cases of limestone and dolomite cyclic （CCR） for CO2-capture processes. The experimental result has confirmed that TCAR plays a major role in calcium-absorbents carbonation reaction. XN for limestone reaches its maximum at TCAR Of 700℃, and the optimum TCAR for dolomite is about 650℃. TCAR in the range of 650-700℃ advantages limestone and dolomite carbonation reaction. XN for limestone in calcination temperature at 1050℃ is much lower than that at 920 ℃, However, such phenomena did not exist for dolomite. XN for limestone decreased as particle size increased, and for dolomite there is an optimized distribution of particle size when XN reached its maximum. At the atmosphere of carbonation high concentration of COz has facilitated the cabonation reaction.[著者文摘]
Key words:
environmental science; Ca-based absorbents; calcination; carbonation; CO2 capture
基金资助:
国家重点基础研究发展计划（973）资助项目（2006CB705806）;江苏省高校研究生科技创新计划资助项目;东南大学优秀博士学位论文基金资助项目
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