Study on effect of different conditions of acid hydrolysis on determination of phosphorus in coal
ZHANG Bo
ZHENG Yan-li
Abstract：The effects of low temperature,long time acid acidolysis condition and high temperature,short time acidolysis condition on the determination of phosphorus in coal were studied by using respectively two kinds of ash decomposition methods (perchloricacid-hydrofluoric acid and sulfuric acid-hydrofluoric acid).The results showed that the high temperature short time of acidolysis method could improve the test efficiency significantly,and the optimum conditions for the acidolysis of perchloric acid-hydrofluoric acid were the temperature of 250 ℃ and the acidolysis duration of 2 h,meanwhile,the best acidolysis conditions of sulfuric acid-hydrofluoric acid were the temperature of 240 ℃ and the acidolysis duration of 2 h,and the results of the two kinds of ash decomposition methods were not significantly different,they could replace each other.
Keywords：colorimetric methodacidolysis conditionsphosphorus content in coalash decompositionperchloric acid-hydrofluoric acidsulfuric acid-hydrofluoric acidacidolysis time
Publication Date：2017-01-01
Pages：4( 47-49,69 )