摘要
本文从热力学角度分别以温度和碱浓度为变量计算了失效催化剂热碱浸出的反应过程,研究了不同温度和不同碱浓度下的物相转化,并通过实验得到V和W元素与催化剂中TiO_2的最佳分离工艺条件:浸出温度高于200℃、最佳碱浓度在16.7%~23.1%。热力学计算过程结合分离产物的成分、物相和形貌进行分析,证明热碱反应过程中催化剂中TiO_2和碱液发生了反应生成钛酸钠。
This article measures the hot alkaline leaching process of inactive catalysts with temperature and alkali concentration as the variables from the aspect of thermodynamics,studies the phase transformation under different temperatures and alkali concentrations,and obtains the optimum conditions for separating elements V and W from TiO2 in catalyst by experiments as follows:leaching temperature:above 200°C;and optimum alkali concentration:16.7%~23.1%.Through the thermodynamic calculation with the analysis of the composition,phase and morphology of the separated products,it is proved that the TiO2 reacts with the alkali liquor in the hot alkaline reaction,and the sodium titanate is produced.
作者
程众
林德海
Cheng Zhong;Lin Dehai(CHN Energy Power Technology Engineering Co.,Ltd.,Jinan,250101;National Institute of Clean-and-low-carbon Energy,Beijing,102211)
出处
《能源科技》
2021年第3期85-88,共4页
Energy Science and Technology
基金
国家重点研发计划资助(2019YFC1907501)。
关键词
SCR催化剂
热力学计算
热碱反应
SCR catalyst
thermodynamic calculation
hot alkali reaction
