Conditions and Mechanisms of Gas Emissions from Didymium Electrolysis and Its Process Control
Conditions and Mechanisms of Gas Emissions from Didymium Electrolysis and Its Process Control
复制标题
DOI：
10.1007/978-3-319-72284-9_187
复制
发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
K. Milicevic;D. Feldhaus;B. Friedrich
中科院分区：
文献类型：
--
作者：
K. Milicevic;D. Feldhaus;B. Friedrich
稀土熔盐电解过程中会产生温室气体排放，引起环境和气候变化。本文采用线性扫描伏安法和阶梯计时电流法确定了氟氧化二锑电解的电化学过程窗口。同时，通过原位红外光谱法研究了气体产生的成分和数量，以了解阳极发生的过程现象及其背后的机制。采用基于NdF3、PrF3和LiF的不同电解质组合物和各种氧化物量，显示出废气比的多样性。研究了以Pr_6O_（11）和Pr_2O_（3）两种氧化镨化合物为原料时，对阳极过程和阳极气体量的影响。全氟化碳（PFC）减排是通过电解自动化来实现的，通过将FTIR光谱仪与控制器耦合，触发氧化物剂量，防止完全阳极效应。
During molten salt electrolysis of rare earths greenhouse gas emission occurs causing environmental and climate changes. In this study the electrochemical process window for didymium oxy-fluoride electrolysis is determined by linear sweep voltammetry and staircase chronoamperometry. Simultaneously the composition and the quantity of gas generation are investigated by an in situ FTIR-spectrometry in order to understand the process phenomena happening at anode and the mechanisms behind them. Different electrolyte compositions based on NdF3, PrF3and LiF and various oxide amounts were employed showing the diversity in off-gas ratios. Effects of using two praseodymium-oxide compounds, namely Pr6O11and Pr2O3used as raw materials, on the process and amount of anodic gases is considered as well. Perfluorocarbon (PFC) emission reduction is accomplished by electrolysis automatization by coupling the FTIR-spectrometer with a controller which triggers the oxide dosage preventing full anode effect.