| 氯化铵浸取纤蛇纹石动力学研究 |
| |
| 引用本文： | 高雄,孟烨,朱辰,赵良.氯化铵浸取纤蛇纹石动力学研究[J].中国岩溶,2011,30(4):472-478. |
| |
| 作者姓名： | 高雄 孟烨 朱辰 赵良 |
| |
| 作者单位： | 南京大学地球科学与工程学院/表生地球化学研究所 |
| |
| 基金项目： | 国家自然科学基金项目(批准号:41002014)、国家863项目(批准号:2009AA06Z112)以及国家地调局项目(批准号:水[2010]矿评03-07-08)联合资助 |
| |
| 摘 要： | 较低的矿物溶解率和反应剂的不可循环利用是CO2矿物封存发展的两大难题。针对这些问题,本文提出了一种新的以可循环的NH4Cl溶液作为中间媒介的CO2矿物封存工艺,并系统地研究了蛇纹石在氯化铵溶液中的液-固两相的反应动力学。实验研究发现:(1)纤蛇纹石的浸取符合Elovich模型,浸取过程基本在1h左右完成,在100℃、5mol/L氯化铵溶液中,纤蛇纹石的浸取率达到12.67%;(2)温度对纤蛇纹石初始反应速率的影响显著,温度越高,反应速率越快;(3)当氯化铵浓度在1~5mol/L范围内变化时,它对镁离子浸取率的影响不明显,反应速率随着浓度的升高而有所增加;(4)本实验反应表现出来的活化能大小为129.56kJ/mol。
|
| 关 键 词： | 氯化铵 纤蛇纹石 Elovich模型 活化能 二氧化碳矿物封存 |
| 收稿时间： | 2011/10/14 0:00:00 |
Study on the kinetics of extracting chrysotile with ammonium chloride |
| |
| Gao Xiong,Meng Ye,Zhu Chen and Zhao Liang.Study on the kinetics of extracting chrysotile with ammonium chloride[J].Carsologica Sinica,2011,30(4):472-478. |
| |
| Authors: | Gao Xiong Meng Ye Zhu Chen and Zhao Liang |
| |
| Institution: | Institute of Surficial Geochemistry, School of Earth Sciences and Engineering, Nanjing University |
| |
| Abstract: | Low mineral dissolution rate and the unrecyclable use of additives are two puzzles development of CO2 sequestration by mineral carbonation.This paper presents a new process of CO2 sequestration by mineral carbonation,which adopts NH4Cl solution as leaching agent,and study the reaction kinetics of chrysotile in NH4Cl solution in a systematic way.The results show that dissolution process is in conformity with the Elovich model and leaching process is usually finished in 1 hour.The leaching rate of magnesium can reach 12.67 % when the concentration of NH4Cl is 5 mol/L and the reacting temperature is 100 ℃.And the leaching rate rise with temperature,meanwhile,neither does the ammonium chloride concentration nor the solid/liquid ratio have much influence on it.The activation energy of dissolution process is determined to be 129.56 kJ/mol in the test. |
| |
| Keywords: | ammonium chloride chrysotile Elovich model activation energy CO2 sequestration by mineral carbonation |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国岩溶》浏览原始摘要信息 |
| 点击此处可从《中国岩溶》下载免费的PDF全文 |
|
