Effect of the presence of HCl on cyclic CO2 capture of calcium-based sorbent in calcium looping process
Effect of the presence of HCl on cyclic CO2 capture of calcium-based sorbent in calcium looping process
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钙循环过程中 HCl 的存在对钙基吸附剂循环 CO2 捕获的影响
DOI：
10.1016/j.apenergy.2014.03.066
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发表时间：
2014-07
期刊：
影响因子：
11.2
通讯作者：
Sun Rongyue
中科院分区：
文献类型：
--
作者：
Wang wenjing;Li Yingjie;Xie Xin;Sun Rongyue
研究了HCl对钙基吸收剂在钙链过程中循环捕集CO2行为的影响。在双固定床反应器中，研究了碳酸化温度、煅烧温度、HCl浓度和石灰石粒径对石灰石在多次煅烧/碳酸化循环中CO2捕集的影响。碳酸化气氛中HCl的存在提高了石灰石在前十几个循环中的CO2捕集能力，但随着循环次数的进一步增加而急剧降低其反应性。HCl的存在加剧了碳化温度和煅烧温度对石灰石捕集CO2能力的影响。石灰石在HCl存在下循环捕集CO2的最佳碳化温度为700 °C，适宜的煅烧温度为900 °C以下。石灰石的循环CO2捕集能力在过去的十几个循环中达到最大值，在存在300 ppm的HCl时，随着HCl浓度从100增加到1000 ppm。在HCl存在下，石灰石的CO2捕集能力更高，颗粒尺寸更小。HCl的存在可能破坏致密的CaCO 3产物层，并且在初始循环中有利于CO2通过产物层的扩散。石灰石在HCl存在下的氯化转化率和熔融CaCl 2-CaCO 3产物层厚度随煅烧/碳酸化循环次数的增加而增加。循环次数超过12次后，石灰石的烧结严重恶化，这一点可以从HCl存在下多次循环后石灰石的显微结构分析中得到证实。
The effect of the presence of HCl on cyclic CO2capture behavior of calcium-based sorbent in the calcium looping process was investigated. When HCl was present in the carbonation atmosphere, the effects of carbonation temperature, calcination temperature, HCl concentration and particle size on CO2capture of the limestone in the multiple calcination/carbonation cycles were studied in a dual fixed-bed reactor. The presence of HCl in the carbonation atmosphere improves CO2capture capacity of the limestone in the previous a dozen cycles, but sharply decreases its reactivity with further increasing the cycle number above a dozen. The presence of HCl intensifies the effects of carbonation temperature and calcination temperature on CO2capture capacity of the limestone. The optimum carbonation temperature and the feasible calcination temperature for cyclic CO2capture of the limestone in the presence of HCl should be 700 °C and below 900 °C, respectively. The cyclic CO2capture capacity of the limestone in the previous a dozen cycles achieves the maximum in the presence of 300 ppm HCl with increasing the HCl concentration from 100 to 1000 ppm. The higher CO2capture capacity of the limestone is achieved with smaller particle size in the presence of HCl. The presence of HCl may destroy the compact CaCO3product layer and it is beneficial to CO2diffusion through the layer in the initial cycles. The chlorination conversion and the molten CaCl2–CaCO3product layer thickness of the limestone in the presence of HCl increase with the number of calcination/carbonation cycles. It severely aggravates the sintering of the limestone once the cycle number is above about a dozen, which can be proved by microstructure analysis of the limestone experienced the multiple cycles in the presence of HCl.
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影响因子：
11.2
作者：
Shiyi Chen;Wenguo Xiang;Dong Wang;Zhipeng Xue
通讯作者：
Shiyi Chen;Wenguo Xiang;Dong Wang;Zhipeng Xue
影响因子：
4.2
作者：
Terence Chin;and Rong Yan;D. T. Liang
通讯作者：
Terence Chin;and Rong Yan;D. T. Liang
影响因子：
7.4
作者：
V. Manović;E. Anthony
通讯作者：
V. Manović;E. Anthony
影响因子：
11.2
作者：
P. E. Sánchez-Jiménez;L. Pérez-Maqueda;J. Valverde
通讯作者：
P. E. Sánchez-Jiménez;L. Pérez-Maqueda;J. Valverde
影响因子：
4.4
作者：
Chrissafis, K;Paraskevopoulos, KM
通讯作者：
Paraskevopoulos, KM