| OCR Text |
Show A165E713.T 7 in stainless steel. Sample contamination is considered unlikely, because the metals were detected in all replicate runs and either not detected or detected at much lower levels in field blanks. Semi-Volatile Organic Emissions (Utility Combustion Turbines) The semi-volatile organic emission results are presented in Table 7. P AH Results. Only three of nineteen species analyzed were detected on the Westinghouse turbine, and two of nineteen species were detected on the GE turbine. PCB Results. No PCBs were measured to detection levels of 2-10 ng/Nm3 PCDD/PCDF Results. Only two homologue classes were detected on the GE turbine, and most isomers and homologue classes were detected on the Westinghouse turbine. The levels detected are orders of magnitude lower than those on municipal solid waste incinerators and other units typically associated with PCDD/PCDF emissions. Benzene and Toluene Emissions Benzene and toluene emissions are presented in Figure 3 from each of the turbines tested. The maximum benzene value measured was 2,359 Ib/l012Btu from the General Electric LM1500 gas turbine at minimum load, with a full load value of 39 Ib/l012Btu. Using a basis of tons per year (tpy) for this turbine, the maximum value for benzene emissions was 0.37 tpy. The minimum benzene value measured was 0.33 ppb at 15 % O2 from the Solar Mars T12000 gas turbine. Toluene values for the Solar Mars T14000 SoLoNOx gas turbine ranged from 5.98 ppb at 15 % O2 at 35 % load down to 1.44 ppb at 15 % O2 at 100% load. Benzene emissions for the General Electric Frame 3 gas turbine were essentially the same at 50% and 100% load. Based on the curves shown, benzene and toluene emissions generally decrease sharply with increasing load. The general trends exhibited by benzene and toluene reflect the same trend shown by CO emissions, indicating that combustion conditions favorable for the destruction of CO will also reduce benzene and toluene levels. Methane and TGNMO Emissions Methane and total gaseous non-methane organics (TGNMO) emissions are presented in Figures 4 and 5 respectively for each of the turbines tested. As one might anticipate, the relative emissions level appears to be inversely proportional to load. Methane was not detected at either load point tested for the General Electric Frame 3 gas turbine, which produced the highest NOx and the lowest CO emissions of the turbines tested. Methane and TGNMO emissions were found to generally decrease sharply with increasing load, and the general trends exhibited by methane and TGNMO reflect the same trend shown by CO emissions, indicating that combustion conditions favorable for the destruction of CO will reduce methane and TGNMO levels. |
