CIESC Journal ›› 2018, Vol. 69 ›› Issue (4): 1586-1594.DOI: 10.11949/j.issn.0438-1157.20170957

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Effect of SO2 on CO2 sorption characteristics using solid amine CO2 sorbent

ZHANG Wenjing1, WU Ye2, CAI Tianyi1, LIU Daoyin1, MA Jiliang1, LIANG Cai1, CHEN Xiaoping1   

  1. 1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China;
    2. MIIT Key Laboratory of Thermal Control of Electronic Equipment, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
  • Received:2017-07-25 Revised:2017-09-18 Online:2018-04-05 Published:2018-04-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51476030, 51506095).

胺基CO2固体吸附剂脱碳特性及SO2的影响

张文静1, 吴烨2, 蔡天意1, 刘道银1, 马吉亮1, 梁财1, 陈晓平1   

  1. 1. 东南大学能源热转换及其过程测控教育部重点实验室, 江苏 南京 210096;
    2. 南京理工大学电子设备热控制工业和信息化部重点实验室, 江苏 南京 210094
  • 通讯作者: 陈晓平
  • 基金资助:

    国家自然科学基金项目(51476030,51506095)。

Abstract:

The presence of trace SO2 in the flue gas of the power plant will affect the CO2 sorption performance and cyclic characteristics of the solid amine sorbent. A solid amine-based CO2 sorbent was prepared by a one-pot sol-gel process followed by supercritical drying (SCD) and the CO2 sorption performance. Deactivation mechanism of the sorbent were studied by using fixed-bed reactor combined with infrared spectroscopy, BET and other test methods. The results show that the solid amine-based CO2 sorbent has excellent CO2 sorption performance and cyclic characteristics when the reaction temperature was 50℃. However, when the reaction atmosphere contains SO2,the non-renewable sulphite or sulfate byproducts reduces the utilization rate of active amine sites, thus significantly decreasing the CO2 adsorption capacity, and consequently, the cyclic characteristics were seriously affected. Besides, the pore distribution of sorbent also tends to small pore volume. Increasing the sorption temperature will enhance the CO2 sorption competivity of the amine based sorbent.

Key words: CO2 capture, solid amine based absorbent, sol-gel method, deactivation, SO2

摘要:

燃煤电厂烟气中存在的微量SO2对胺基CO2固体吸附剂的碳酸化反应及循环特性有不利影响。利用固定床反应器,针对采用溶胶凝胶法制备的胺基CO2固体吸附剂的碳酸化特性及其在含SO2气氛下的失效规律进行了实验研究,并结合红外光谱、有机元素分析、BET等测试手段,研究其失效机理。结果表明,所制备的胺基CO2固体吸附剂在反应温度50℃时具有较好的碳酸化反应特性和循环特性。当反应气氛中存在SO2时,由于生成了不可再生的亚硫酸/硫酸盐类物质而导致胺基活性位损失,孔隙结构发生变化,影响了吸附剂的脱碳性能,但适当提高反应温度可提高吸附剂的碳酸化反应竞争性。

关键词: CO2捕集, 固体胺基吸附剂, 溶胶凝胶法, 失效, SO2

CLC Number: