OCR Text |
Show 5 classes as fuel nitrogen-bound species, low molecular-weight hydrocarbons and oxides of carbon. EPA methods 0010 and 18 were used to measure Semi-Volatile OrganiC Compounds (SVOCs) and Volatile Organic Compounds (VOCs), respectively. The inhouse technique was used to measure, principally, the sixteen poly-cyclic aromatic hydrocarbons (PAHs), which are on the EPA priority list of compounds. Each measurement was done in duplicate at a minimum to determine data reproducibility. All the test specimen from EPA sampling methods were sent out to an independent laboratory for analysis of volatile organic compounds and poly-cyclic aromatic hydrocarbons. Figures 2 depicts diagrammatically the succession of events for VOC and SVOC determinations. Table 1 Measurement TechniqueslProtocols and Target Compounds Measurement Sampling Medium Sampling Analytical Analysis Techniques Method Method FTIR & GC Flue Gas FTIR&GC FTIR&GC HCN, COx, NHi, CnHm, etc. MM-5 XAD-2 Resin EPA 0010 EPA 8270 Semi-VOCs (GCIMS) Tedlar Bags Flue Gas EPA 18 EPA 8240 VOCs (GCIMS) ABB-MIT Methylene Chloride In-house GC PAHs Results Fuel Analysis. Pertinent analyses of the 400xO-mesh size fraction of the test coal sample are given in Table 2. This fine size grade, indicated by a Rosin-Rammler mean weight size (Field, et aI., 1967) of -18 J.LlTl, was utilized to ensure that carbon burnout would be enhanced in the MSDT -2, which operates in the laminar, rather than turbulent, flow regime. |