Table 3 Proximate analysis, ultimate analysis and heating value of hydrochars.

From: Valorization of winery and distillery by-products by hydrothermal carbonization

Sample

Elemental analysis (wt%, db)

Proximate analysis (wt%, db)

LHV (MJ/kg, db)

C

H

N

S

O

H/C

O/C

VM

Ash

FC

180–1–0.15

49.25

6.53

1.47

0.15

39.36

1.59

0.60

70.41

3.25

26.45

18.03

180–4–0.05

51.97

7.60

2.18

0.09

34.96

1.75

0.50

69.52

3.20

27.29

18.95

180–4–0.25

50.24

7.02

2.07

0.23

36.21

1.68

0.54

68.94

3.24

27.63

18.21

180–7–0.15

53.50

7.27

2.13

0.21

33.54

1.63

0.47

67.37

3.36

29.28

20.05

220–1–0.05

55.11

7.58

2.13

0.11

31.32

1.65

0.43

67.18

3.75

29.08

19.88

220–1–0.25

55.03

6.46

1.53

0.04

33.43

1.41

0.46

65.08

3.51

31.42

19.87

220–4–0.15

60.30

6.32

1.81

0.19

26.99

1.26

0.34

61.11

4.39

34.50

21.16

220–4–0.15

59.12

6.44

1.87

0.14

28.91

1.31

0.37

60.55

3.53

35.93

21.17

220–4–0.15

59.55

6.38

1.83

0.20

28.65

1.29

0.36

61.30

3.40

35.31

21.34

220–7–0.05

60.96

7.53

2.75

0.21

23.61

1.48

0.29

56.81

4.95

38.25

22.44

220–7–0.25

60.53

7.29

2.45

0.12

25.82

1.45

0.32

59.92

3.79

36.30

21.71

260–1–0.15

66.61

6.60

2.15

0.31

20.56

1.19

0.23

57.25

3.77

38.98

23.36

260–4–0.05

65.65

7.75

3.06

0.22

16.88

1.42

0.19

53.04

5.44

41.52

24.47

260–4–0.25

69.01

6.82

2.28

0.12

18.11

1.19

0.20

53.99

3.66

42.36

23.73

260–7–0.15

69.18

6.66

2.32

0.19

17.30

1.15

0.19

53.04

4.36

42.39

24.84

  1. VM volatile matter, FC fixed carbon, LHV lower heating value.