Magnesium oxide sensitivity analysis

Magnesium. Magnesium oxide, MgO fume, can be analyzed by P CAM 173 or S-369 (12). Magnesium is the most sensitive element for AAS analysis. Air-acetylewne atomization is generally recommended for Mg analysis however, Si,Al, and Cu are serious interferences. These interferences can be minimized using the less sensitive nitrous oxide/acetylene flame with 1000 ppm Cs in the final solution. 

An improved magnesium oxide (MgO) flue gas desulfurization process and its comparative economics are described. Innovations made include the use of a spray dryer, a cyclic hotwater reheater, and a coal-fired fluidized-bed reactor for regeneration of the MgO absorbent. Several technical concerns with the proposed design are addressed, including fly ash and chloride buildup. The economic evaluation shows the process to have a capital investment of about seven percent less than that of a conventional MgO scrubbing process and a 40 percent smaller annual revenue requirement. Finally, a sensitivity analysis is shown relating annual revenue requirements to the byproduct sulfuric acid price credit. 

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