Utilization of lime mud from paper mill as CO2 sorbent in calcium looping process
Utilization of lime mud from paper mill as CO2 sorbent in calcium looping process
复制标题
利用造纸厂石灰泥作为钙循环工艺中的CO2吸附剂
DOI：
10.1016/j.cej.2013.01.068
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发表时间：
2013-04
影响因子：
15.1
通讯作者：
路春美
中科院分区：
文献类型：
--
作者：
孙荣岳;李英杰;刘长天;谢辛;路春美
利用造纸工业碱回收过程中的苛化反应产生的固体废物石灰泥(LM)作为钙环工艺中的CO2脱附剂进行了研究。在双固定床反应器和热重分析仪上研究了LM在焙烧/碳化循环中的碳化行为。结果表明，在相同的反应条件下，LM的碳化转化率低于石灰石。这是由于LM中的氯含量较高，导致了更明显的烧结，降低了LM的CO2捕集性能。采用预洗工艺降低了乳化液中的氯含量。综合考虑各种因素，当LM中氯/钙的摩尔比小于1：100时，预洗工艺是有效的。与LM相比，预洗石灰泥(PLM)具有更高的碳化速率和碳化转化率。在850℃焙烧和700℃碳化时，PLM的碳化转化率在100次循环后仍保持在36%，分别是LM和石灰石的1.8倍和4.8倍。相同循环次数后，焙烧的PLM的孔容和比表面积均大于焙烧的LM，尤其是孔径在10~100 nm范围内的孔容。这就是为什么PLM在多次焙烧/碳化循环中表现出比LM更高的CO2捕集能力的原因。LM和PLM的碳化转化率因其煅烧产物的水化作用而进一步增强。
Lime mud (LM), a solid waste that results from the causticization reaction in alkali recycling process of paper manufacture industry, was utilized as CO2sorbent in calcium looping process in this study. The carbonation behavior of LM in the calcination/carbonation cycles was investigated in a dual fixed-bed reactor and a thermo-gravimetric analyzer. The results show that the carbonation conversions of LM are lower than those of limestone at the same reaction conditions. It attributes to the high chlorine content in LM which leads to more pronounced sintering and decreases the CO2capture performance of LM. A pre-wash process was employed to decrease the chlorine content in LM. Based on an overall consideration of various factors, the pre-wash process is effective enough if the Cl/Ca molar ratio in LM is smaller than 1:100. Pre-washed lime mud (PLM) achieves higher carbonation rates and carbonation conversions, compared with LM. When calcined at 850°C and carbonated at 700°C, the carbonation conversion of PLM maintains at 36% after 100cycles, which is 1.8 and 4.8 times as high as LM and limestone after the same number of cycles, respectively. The pore volume and surface area of calcined PLM were greater than those of calcined LM after the same number of cycles, especially the volume of the pores in the range of 10–100nm in diameter. That is the reason why PLM exhibits higher CO2capture capacity than LM in the multiple calcination/carbonation cycles. The carbonation conversions of LM and PLM are further enhanced by hydration of their calcines.
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影响因子：
5.3
作者：
B. Feng;Wenqiang Liu;Xiang Li;H. An
通讯作者：
B. Feng;Wenqiang Liu;Xiang Li;H. An
影响因子：
15.1
作者：
B. Arias;G. Grasa;J. C. Abanades
通讯作者：
B. Arias;G. Grasa;J. C. Abanades
DOI：
10.1016/j.fuproc.2010.11.002
发表时间：
2011-03
期刊：
Fuel and Energy Abstracts
影响因子：
--
作者：
Huichao Chen;Changsui Zhao;L. Duan;L. Cai;D. Y. Liu;Xiaoping Chen
通讯作者：
Huichao Chen;Changsui Zhao;L. Duan;L. Cai;D. Y. Liu;Xiaoping Chen
影响因子：
7.4
作者：
V. Manović;E. Anthony
通讯作者：
V. Manović;E. Anthony
影响因子：
2.1
作者：
Yingjie Li;Changsui Zhao;Huichao Chen;Yi Liu
通讯作者：
Yingjie Li;Changsui Zhao;Huichao Chen;Yi Liu