| Al2O3-V2O5体系的热力学优化 |
| |
| 引用本文： | 李徐刚,谢伟,王耐,乔芝郁,曹战民.Al2O3-V2O5体系的热力学优化[J].有色金属科学与工程,2019,10(6):13-18. |
| |
| 作者姓名： | 李徐刚 谢伟 王耐 乔芝郁 曹战民 |
| |
| 作者单位： | 北京科技大学冶金与生态工程学院,北京,100083;河钢集团唐钢公司,河北 唐山,063000 |
| |
| 基金项目： | 国家自然科学基金资助项目51674019 |
| |
| 摘 要： | 在对Al2O3-V2O5体系相图、热力学数据以及晶体结构数据进行综述与评估的基础上，采用相图计算方法对Al2O3-V2O5体系进行热力学优化.液相采用修正的似化学模型进行描述，利用对近似处理液相中存在的短程有序.将液相模型的最大短程有序设置在AlVO4处，将VO43-当作液相中V2O5的基本组成单元.体系中AlVO4相看作线性化合物.计算结果很好的重现了选定的实验数据，获得了一套合理、可靠、自洽的模型参数用来描述体系中各相的热力学性质，为Al2O3负载V2O5型催化剂催化性能的提高打下坚实的基础.
|
| 关 键 词： | Al2O3-V2O5 修正的似化学模型 热力学 相图 |
| 收稿时间： | 2019-10-09 |
Thermodynamic optimization of Al2O3-V2O5 system |
| |
| Affiliation: | 1.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China2.HBIS Group Tangsteel Company, Tangshan 063000, China |
| |
| Abstract: | On the basis of summarizing and evaluating the phase diagram, thermodynamic data and crystal structure data of Al2O3-V2O5 system, thermodynamic optimization of Al2O3-V2O5 system is carried out by using phase diagram calculation method. The liquid phase is described by the modified quasichemical model with the pair approximation, which takes short-range ordering in liquid solution into account. The VO43- is considered as the basic building unit of V2O5 in the liquid solution and the maximum short-range ordering is set at the AlVO4 composition. The AlVO4 phase is treated as stoichiometric compound. The experimental data are reproduced well and a set of self-consistent model parameters is obtained to describe the thermodynamic property of every phase in this binary system. The present study can be used as a basis for improving the catalytic performance of the catalyst supporting V2O5 on Al2O3. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《有色金属科学与工程》浏览原始摘要信息 |
|
点击此处可从《有色金属科学与工程》下载全文 |
|
