A suitable system and the best condition were determined for sulfur removal from coal by electrolysis through testing, and the effect of electrolytic conditions on desulfurization rate was studied At the same time, the influence of electrolysis desulfurization on the structure of coal was inquired into The results showed that the effect of desulfurization was the best in sodium bromide electrolytic system, the best desulfurization condition was =1 5?mol/L, I=0 7?A, T=343?K, t=4?h and the highest desulfurization rate reached 89% We found that with increasing electrolytic conditions, desulfurization rate increased at first, and then kept constant The analysis of IR spectrum showed that the structure of coal wasn’t
Problems in desulfurization of coal by electrochemical reduction is analyzed and calculated. The result shows that 1 ) the △rGm function of the reaction of pyrite into FeS and the modifying reaction decreasing the oxygenous functions on coal surface is smaller than zero in a spontaneous reaction, and greater than zero in a non-spontaneous reaction; 2) the △rGm value can be adjusted by pH and the dosage of electrolyte to make it be greaterthan zero , which is favorable for the modifying reaction and useful for desulfurization of coal. The research has provided a theoretical foundation for determining reasonable technical parameters of desulfurization。
