Determination of Carbon Content in Chlorinated Molten Salt by High-Frequency Heating-Infrared Spectroscopy
Carbon is one of the important reactants in molten salt chlorination,and its content affects the progress of chlorination reaction,so accurately determining carbon content in molten salt is of great significance for guiding production.Chlorinated molten salt is a high-chlorine sample,which is currently burned by tube furnaces or high-frequency furnaces.and there are problems that there is a lack of corresponding standard samples to establish the standard cost curve of the instrument and the chlorine gas generated by combustion is easy to corrode the instrument when determining carbon content in molten salt by the infrared absorption method.The experiment proposes to dilute the standard samples of petroleum coke with sodium chloride and prepare carbon calibration samples with different con-centrations,modifies the reagent tube of the instrument,and absorbs chlorine gas with quartz sand-calcium hydroxide (3:1),which effectively solves the above problems.In addition,the experiment also studies the effects of high-frequency power and flux on carbon determination,and establishes a high-frequency heating-infrared absorption method to determine carbon content in chlorinated molten salt.Experimental results show that when the mixed flux of 0.5 g of pure iron and 1.0 g of tungsten tin is added and high-frequency power is 70％,carbon is completely oxidized to carbon dioxide,and that when artificially-synthesized calibration samples are used to establish standard curves,the mass fraction of carbon is in the range of 0.86％～6.46％,with good linearity,which meets production control requirements.
NETL
NSTL
万方数据
