微型流化床,动力学,气固反应,碳酸钙分解," /> 微型流化床,动力学,气固反应,碳酸钙分解,"/> micro fluidized bed,kinetics,gas-solids reaction,calcium carbonate decomposition,"/> <p class="MsoNormal"> 碳酸钙分解动力学的微型流化床与热重对比研究
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沈阳化工大学学报, 2023, 37(1): 1-7    doi: 10.3969/j.issn.2095-2198.2023.01.001
  化学与化学工程 本期目录 | 过刊浏览 | 高级检索 |

碳酸钙分解动力学的微型流化床与热重对比研究

沈阳化工大学 化学工程学院,辽宁 沈阳 110142;

沈阳化工大学 能源与化工产业技术研究院, 辽宁 沈阳 110142

中国科学院过程工程研究所 多相复杂系统国家重点实验室, 北京 100190


Comparation of Calcium Carbonate Decomposition Kinetics Studied by Micro Fluidized Bed and by Thermogravimetric Analyzer

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摘要 

利用微型流化床反应分析仪(MFBRA)和热重分析仪(TGA)分别测定了空气中碳酸钙的等温与非等温反应,并采用不同的数据处理方法对其分解动力学进行了对比研究.MFBRA增强了反应过程中传热传质以及有效消除气体外扩散对反应的影响,其测得的活化能(E=138.35 kJmol-1)和指前因子(A=1.58×105 s-1)均低于TGAE=209.95 kJmol-1A=8.95×107 s-1)获得的结果,但两者所测得的活化能均在文献报道的120 ~ 280 kJmol-1范围内.此外,两种仪器得到的最概然机理函数模型均为收缩几何模型(圆柱形对称)G(x)=1-(1-x)1/2,表明了MFBRA在气固反应动力学表征方面的有效性和可靠性.

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关键词:  微型流化床')" href="#">

微型流化床  动力学  气固反应  碳酸钙分解    

Abstract: 

The isothermal and non-isothermal reactions of calcium carbonate decomposition were determined by micro fluidized bed reaction analyzer(MFBRA) and thermogravimetric analyzer(TGA),respectively,and different data processing methods were adopted to calculate the reaction kinetics.MFBRA enhances heat and mass transfer and effectively eliminates the effect of gas external diffusion on the reaction,resulting in lower obviously activation energyE=138.35 kJmol-1 and pre-exponential factorA=1.58×105 s-1 than those obtained by TGAE=209.95 kJmol-1A=8.95×107 s-1,but both of activation energies are in the range of 120-280kJmol-1reported in the literatures.In addition,the most suitable mechanism function model in both TGA and MFBRA follows the shrinking core model(cylindrical symmetry) G(x)=1-(1-x)1/2,revealing the reliability and effectiveness of MFBRA for kinetic characterization of gas-solid reaction kinetics.

Key words:  micro fluidized bed')" href="#">

micro fluidized bed    kinetics    gas-solids reaction    calcium carbonate decomposition

               出版日期:  2023-02-27      发布日期:  2024-06-06      整期出版日期:  2023-02-27
ZTFLH: 

TQ031.3

 
基金资助: 

科技部重点研发计划(2018YFF01011400;国家自然科学基金(U1908201

作者简介:  郝文倩(1998—),女,山西朔州人,硕士研究生在读,主要从事微型流化床动力学研究.
引用本文:    
郝文倩, 刘雪景, 王可心, 王樱澈, 岳君容, 丁茯, 许光文.

碳酸钙分解动力学的微型流化床与热重对比研究 [J]. 沈阳化工大学学报, 2023, 37(1): 1-7.
HAO Wenqian, LIU Xuejing, WANG Kexin, WANG Yingche, YUE Junrong, DING Fu, XU Guangwen.

Comparation of Calcium Carbonate Decomposition Kinetics Studied by Micro Fluidized Bed and by Thermogravimetric Analyzer . Journal of Shenyang University of Chemical Technology, 2023, 37(1): 1-7.

链接本文:  
https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2023.01.001  或          https://xuebao.syuct.edu.cn/CN/Y2023/V37/I1/1

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