| 钙基CO_2吸收剂的种类和粒径对循环煅烧/碳酸化的影响 | |
| 房凡 ; 李振山 ; 蔡宁生 ; FANG Fan ; LI Zhen-Shan ; CAI Ning-Sheng | |
| 2010-05-13 ; 2010-05-13 | |
| 关键词 | CO_2分离 循环碳酸化/煅烧反应 流化床 钙基CO_2吸收剂 CO_2 separation carbonation/calcination cycle fluidized bed Ca-based CO_2 sorbent X513 |
| 其他题名 | EFFECTS OF Ca-BASED CO_2 SORBENT TYPE AND PARTICLE SIZE ON MULTIPLE CARBONATION/CALCINATION CYCLE |
| 中文摘要 | 在流化床反应器内研究了吸收剂种类(石灰石、白云石)和颗粒粒径(90～200μm和200～450μm)对钙基吸收剂碳酸化特性、煅烧特性以及循环稳定性的影响,并对新型CaO/Ca_(12)Al_(14)O_(33)吸收剂的循环稳定性进行研究.结果表明,钙基吸收剂在流化床内均能有效吸收CO_2.在碳酸化阶段,吸收剂种类对吸收剂的吸收特性影响较大,而颗粒粒径对其影响较小;在煅烧阶段,CaCO_3分解速率随颗粒粒径的减小而增大.随着循环反应次数的增加,钙基吸收剂反应活性下降,相对于白云石和石灰石,CaO/Ca_(12)Al_(14)O_(33)具有更高的循环稳定性,并在七次循环后活性不再发生变化.对于石灰石吸收剂,循环稳定性随循环次数的变化受粒径影响较小.白云石吸收剂由于在循环中容易破碎,因此粒径对其循环稳定性有一定的影响.; Effects of sorbent type(limestone,dolomite)and particle size(90～200μm and 200～450μm)on carbonation/calcination characteristics and cyclic stability were investigated by a fluidized bed reactor,so was the cyclic stability of CaO/Ca_(12)Al_(14)O_(33).Experimental results show that CO_2 in the flue gases can be absorbed effectively by all sorbents in the fluidized bed.In the process of carbonations,the effect of sorbent type on the CO_2 sorption characteristics is large,but particle size is not.In the process of calcinations,the decomposition rate of CaCO_3 increases with the decrease of the particle size.With increasing of the carbonation/calcination cycles,cyclic sorption reactivities of CaO decline.Comparing with limestone and dolomite,CaO/Ca_(12)Al_(14)O_(33)has more stable cyclic reactivity which keeps constant after 7 cycles.For limestone,particle size has little effect on the cyclic reactivity of the sorbent.Because of particle fragmentation,particle size of dolomite has some effects on the cyclic stability during the carbonation/calcination cycles. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/31504]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 房凡,李振山,蔡宁生,等. 钙基CO_2吸收剂的种类和粒径对循环煅烧/碳酸化的影响[J],2010, 2010. |
| APA | 房凡,李振山,蔡宁生,FANG Fan,LI Zhen-Shan,&CAI Ning-Sheng.(2010).钙基CO_2吸收剂的种类和粒径对循环煅烧/碳酸化的影响.. |
| MLA | 房凡,et al."钙基CO_2吸收剂的种类和粒径对循环煅烧/碳酸化的影响".(2010). |
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