Destruction efficiency of 3 gaseous PFAS (CF4, CHF3, C2F6) injected at various ports (Tables 2 and 3); residual concentrations of PFAS and various other combustion products under same conditions (Table 3)
Port 4; 40 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
At flame; Natural Gas Port; 40 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 8; 40 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 10; 40 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 11; 40 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 12; 40 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
At flame; Natural Gas Port; 45 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
At flame; Natural Gas Port; 64 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 4; 45 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 12; 45 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 6; 45 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 8; 45 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.
Port 10; 45 kW loading experiment; The model assumes initial adiabatic flame temperature (2071 °C) and a linear temperature decay to Port 1. PFAS introduced with the natural gas or combustion air (t=0 sec) experience the full temperature profile (Figure 3) and flame chemistry before being analyzed by FTIR at Port 18 (t~7.4 sec). However, PFAS introduced at Ports 4‐12 experienced reduced temperatures, residence times, and exposure to flame chemistry.