φ

53.5% NH₃/46.5% CH₄/Air (%)

80% NH₃/20% CH₄/Air (%)

Before

After

Before

After

0.7

—

—

—

—

0.8

16.02

2.90

1.55

11.31

0.9

9.57

7.45

1.98

7.96

1.0

8.84

7.04

1.57

8.03

1.1

9.21

6.66

2.28

6.43

1.2

0.62

7.02

7.37

9.03

1.3

—

—

16.33

12.60

Average

8.85

6.21

5.18

9.23