Development of Industrial Methods of Analysis of Sulfur Compounds in Coal Process Streams. Tenth Quarterly Technical Progress Report, January-March 1980

摘要

The concept of molar distribution coefficients (MDC) has been adapted to computerized estimation of aqueous sulfur moiety concentrations in complex mixtures, as a function of pH, redox potential and temperature. The electrooxidation of tetrathionate was ascertained to proceed with 100% current efficiency at a rotated glassy carbon disk anode. The reaction of hydroxymercury benzoate (HMB) with polysulfides was investigated by thermometric enthalpy titrations. Differential pulse voltammetry at a rotated glassy carbon disk anode has been successfully applied to selectively identify and accurately quantitate dibenzothiophene (DBT) in a DOE-NSF surrogate analysis sample, consisting of SRC II products blended to simulate No. 2 fuel oil. The relevant DBT content was 0.14%. (ERA citation 05:025212)