Skip to main content

Table 4 CHN analysis for coal-urea (UBC-M) granules dried under different conditions

From: A slow release nitrogen fertiliser produced by simultaneous granulation and superheated steam drying of urea with brown coal

Drying conditions

C %

H %

N %

O %a

Air dried, ambient, 5 days

50.0

5.4

11.0

31.2

Air dried, oven 105 °C, 1 h

42.7

5.6

10.0

39.2

Air dried, oven 130 °C, 1 h

45.4

5.6

10.6

35.7

Steam dried, oven 105 °C, 60 % RH, 1 h

33.6

6.4

7.7

49.8

Steam dried, oven 130 °C, 60 % RH, 1 h

48.0

5.3

9.8

34.7

Steam dried, oven 105 °C, 100 % RH, 1 h

34.7

6.1

8.0

48.6

Steam dried, oven 130 °C, 100 % RH, 1 h

43.6

5.2

10.5

38.5

  1. a Oxygen was calculated by difference