Table 6 cDetailed measurement of stack emissions for two factories burning HFO and other burning NG.

From: Analytical Study of Fuel Switching from Heavy Fuel Oil to Natural Gas in clay brick factories at Arab Abu Saed, Greater Cairo

Emission Parameter Heavy Fuel Oil (HFO) Natural Gas (NG)
Kiln 1 Kiln 2 Average Kiln 3 Kiln 4 Average
Production (tone/day) 141.8 138.5 140.15 166.8 150.1 158.45
Heat released (MMBTU/hr) 8.73 7.50 8.11 11.01 11.24 11.12
Stack gas flow rate (m3/hr) 22796 13839 18317.5 24131 32937 28534
Stack gas temperature (C) 87 113 100 84.1 80 82.55
Stack gas moisture (%) 7.44 8.96 8.2 7.78 7.23 7.5
Stack gas oxygen (% dry) 18 17.7 17.85 18.9 18.8 18.85
PM conc. (mg/m3) 1679 1714 1696.5 74.1 61.5 67.8
PM10 % of PM 95 97 96 38.5 48.6 43.55
SO2 conc. (mg/m3) 250 618 434 83 82 82.5
NO2 conc. (mg/m3) 69 209 139 75 66.8 70.9
Average production (Red Brick) RB/day 64,571 72,232 68,401 69,200 58,532 63,866
Average Consumption/HFO (kg/day) – NG (m3/day) 5,749 6,303 6,026 6,426 5,697 6,035
Specific Fuel consumption/HFO (kg/1000 RB) – NG (m3/1000 RB) 89.03 87.26 88.14 101 115 108