项目名称： 燃煤污染物对钾基吸收剂脱碳影响机制研究

项目编号： No.U1510129

项目类型： 联合基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 赵传文

作者单位： 南京师范大学

项目金额： 59万元

中文摘要： 钾基吸收剂干法脱碳技术具有脱碳能力强、造价低廉、工艺能耗低的优势值得关注。由于燃煤烟气中的酸性气体和飞灰颗粒将会影响钾基吸收剂的脱碳性能，但其影响机制并不明确。本项目将围绕这一核心问题，采用热重、小试反应床实验结合各种理化性质分析仪器研究燃煤烟气中SOx、NOx和HCl等酸性气体对钾基吸收剂碳酸化反应的影响机制，研究飞灰颗粒及所含各元素对吸收剂晶相结构和脱碳性能的影响机制，通过添加掺杂剂和改变吸收剂制备方法的途径探索抑制吸收剂失效的新方法。通过研究揭示钾基吸收剂在燃煤烟气复杂环境下的失效机制，探明其化学反应动力学机理，通过改性最终研制出高寿命高活性的新型钾基CO2吸收剂。本研究可为我国燃煤电厂温室气体超低排放技术发展提供相关基础理论储备。

中文关键词： CO2吸收；钾基吸收剂；燃煤烟气；微观反应机理；反应动力学

英文摘要： Using dry potassium-based sorbents for post-combustion CO2 capture technology is thought to be one of the interesting methods due to the high CO2 sorption performance, the low cost, low energy consumption and so on. However, the CO2 capture performances of potassium-based sorbents will be affected by the various compositions of flue gas from coal fired power plant. As a result, this is identified as the most important problem in this project, and several key issues will be solved. First, the effects of acid gases such as SOx, NOx and HCl in flue gas, and fly ash particles on the CO2 capture performances of potassium-based sorbents should be studied with the tests using TGA, a bench-scale reactor and various analysis apparatuses. Then, the gas-solid reaction dynamics performances of potassium-based sorbents with CO2 under the complex conditions of coal-fired flue gas will be studied. At last, the new method for preventing the deactivation of the sorbents will be obtained by changing the compositions and the prepared methods of the sorbents. The mechanisms and the reaction dynamics performances for the deactivation of the sorbents in the complex conditions of flue gases will be confirmed, and a new method for improving the performances of the sorbents will be obtained. The work of this project can be used as basic data for the development of the technology for China's coal-fired power plants ultra-low emissions of greenhouse gases.

英文关键词： CO2 capture;potasium-based sorbent;coal-fired flue gas;microcosmic mechanism;reaction dynamics