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Table 2 Experimental data and data from Literature

From: Application of gene expression programming, artificial neural network and multilinear regression in predicting hydrochar physicochemical properties

S/N

Samples

VM (%)

Ash (%)

FC (%)

Temp (oC)

RT

(Min)

MY

(%)

EY

(%)

HHV (MJ/kg)

References

1.

Searsia lancea

75.67

4.26

20.07

200

30

67.25

79.12

20.27

Present study

2.

75.67

4.26

20.07

200

60

61.91

83.11

23.13

3.

75.67

4.26

20.07

200

90

61.78

84.12

23.46

4.

75.67

4.26

20.07

250

30

49.49

79.13

27.55

5.

75.67

4.26

20.07

250

60

47.11

76.31

27.91

6.

75.67

4.26

20.07

250

90

46.36

75.15

27.93

7.

75.67

4.26

20.07

280

30

35.61

59.87

28.97

8.

75.67

4.26

20.07

280

60

34.89

59.43

29.35

9.

75.67

4.26

20.07

280

90

41.66

71.84

29.71

10.

Wanlip sewage sludge

68.56

27.54

3.9

140

240

74.04

72.75

21.45

(Danso-Boateng 2015)

11.

68.56

27.54

3.9

170

240

66.17

66.75

22.02

12.

68.56

27.54

3.9

190

240

61.27

62.4

22.65

13.

68.56

27.54

3.9

200

240

60.17

62.15

23.13

14.

Seaweed

63.29

24.28

12.43

180

30

46.9

53.09

13.81

(Patel 2019)

15.

63.29

24.28

12.43

180

60

45.65

58.97

15.76

16.

63.29

24.28

12.43

180

120

45.3

61.75

16.63

17.

63.29

24.28

12.43

200

30

45.95

61.73

16.39

18.

63.29

24.28

12.43

200

60

41.8

60.23

17.58

19.

63.29

24.28

12.43

200

120

39.7

58.96

18.12

20.

63.29

24.28

12.43

220

30

36.1

53.11

17.55

21.

63.29

24.28

12.43

220

60

34.65

53.51

18.27

22.

63.29

24.28

12.43

220

120

30.5

49.65

18.93

23.

Coffee cherry parchment

76.31

6.80

16.88

180

180

55

66

21.83

(Silakova 2018)

24.

76.31

6.80

16.88

200

180

54

69

23.12

25.

76.31

6.80

16.88

220

180

46

63

24.92

26.

76.31

6.80

16.88

240

180

34

54

28.83

27.

Coffee wood

82.70

1.83

15.47

180

180

68

75

21.93

28.

82.70

1.83

15.47

200

180

66

75

22.53

29.

82.70

1.83

15.47

220

180

57

72

25.09

30.

82.70

1.83

15.47

240

180

46

60

26.02

31.

Eucalyptus wood

84.96

0.25

14.79

180

180

72

78

21.4

32.

84.96

0.25

14.79

200

180

60

74

24.07

33.

84.96

0.25

14.79

220

180

57

72

24.77

34.

84.96

0.25

14.79

240

180

52

66

24.97

35.

Bamboo

83.51

1.16

15.32

180

180

62

70

22.29

36.

83.51

1.16

15.32

200

180

54

65

23.45

37.

83.51

1.16

15.32

220

180

53

66

24.2

38.

83.51

1.16

15.32

240

180

52

71

26.54

39.

Miscanthus

87.5

0.8

11.7

190

5

83.5

91.17

20.2

(Kambo and Dutta 2014)

40.

87.5

0.8

11.7

225

5

66.9

78.11

21.6

41.

87.5

0.8

11.7

260

5

47.8

66.92

25.9

42.

Spruce

85.18

0.68

14.14

175

30

81.96

86.09

21.91

(Bach et al. 2016)

43.

85.18

0.68

14.14

200

10

77.63

82.48

22.16

44.

85.18

0.68

14.14

200

30

73.61

80.98

22.95

45.

85.18

0.68

14.14

200

60

69.54

76.98

23.09

46.

85.18

0.68

14.14

225

30

67.63

76.75

23.67

47.

Birch

89.74

0.64

9,63

175

30

78.54

80.44

20.03

48.

89.74

0.64

9.63

200

10

64.22

66.94

20.39

49.

89.74

0.64

9.63

200

30

62.17

66.98

21.09

50.

89.74

0.64

9.63

200

60

60.25

65.97

21.42

51.

89.74

0.64

9.63

225

30

56.91

64.28

22.1

52.

Sewage Sludge

34.3

11.1

54

200

30

97

100.8

29.8

(Saba et al. 2017)

53.

34.3

11.1

54

230

30

99.2

101.8

29

54.

34.3

11.1

54

260

30

96.1

101.5

28.1

55.

Miscanthus

84.5

1.3

12.8

200

30

68.8

71

20.4

56.

84.5

1.3

12.8

230

30

57.2

71,2

24.6

57.

84.5

1.3

12.8

260

30

46.2

67

28.6

58.

Empty Fruit Bunch

77.91

4.55

17.54

220

240

56.6

72.7

27.43

(Stemann et al. 2013)

59.

77.91

4.55

17.54

220

240

58.6

77

28.03

60.

Olive Mill Waste

72

2

26

180

180

81.70

95.06

26.32

(Gao et al. 2019)

61.

72

2

26

220

180

70.80

88.14

28.16

62.

72

2

26

250

180

57.60

82.12

32.25

63.

Municipal Solid Waste

76

5

20

220

120

63.90

82,46

28,35

64.

75.6

4.9

19.5

250

180

54.9

74,22

29,7

65.

Opuntia Ficus Indica

66.8

12.9

20.3

220

180

37.1

52,03

19,45

66.

66.8

12.9

20.3

250

180

26.7

39,83

20,69

67.

Gwangju sewage sludge

72.33

17.05

10.62

180

30

93.13

101,51

22,47

(Lee et al. 2019)

68.

72.33

17.05

10.62

210

30

85.84

97,86

23,42

69.

72.33

17.05

10.62

240

30

67.93

75,40

22,86

70.

72.33

17.05

10.62

270

30

40.78

37,11

18,64

71.

Chlorella sp

80.73

6.67

12.6

180

30

98.23

105,11

24,73

72.

80.73

6.67

12.6

210

30

97.03

112,55

26,68

73.

80.73

6.67

12.6

240

30

81.3

93,50

26,55

74.

80.73

6.67

12.6

270

30

60.59

67,86

25,82

75.

Mixture (sewage Sludge + Chlorella sp)

74.55

14.32

11.13

180

30

93.97

102,43

23.07

76.

74.55

14.32

11.13

210

30

87.68

100.83

24.29

77.

74.55

14.32

11.13

240

30

64.38

73.39

24.15

78.

74.55

14.32

11.13

270

30

45.98

46.90

21.69

79.

Changsha sewage sludge

47.49

49.85

2.66

180

30

66.18

65.15

10.8

(Peng et al. 2016)

80.

47.49

49.85

2.66

220

30

60.58

55.61

10.07

81.

47.49

49.85

2.66

260

30

56.23

60.43

11.79

82.

47.49

49.85

2.66

300

30

53

54.26

11.23

83.

47.49

49.85

2.66

260

60

58.51

64.32

12.06

84.

47.49

49.85

2.66

260

90

59.37

61.59

11.38

85.

47.49

49.85

2.66

260

360

63.32

56.57

9.8

86.

47.49

49.85

2.66

260

480

66.19

65.53

10.86

87.

Opuntia ficus-indica cladodes

70.62

15.15

14.23

180

30

66.05

80

16.8

(Volpe et al. 2018)

88.

70.62

15.15

14.23

180

60

64.90

81

17.31

89.

70.62

15.15

14.23

180

180

64.21

83

17.93

90.

70.62

15.15

14.23

220

30

61.91

84

18.82

91.

70.62

15.15

14.23

220

60

59.35

81

18.93

92.

70.62

15.15

14.23

220

180

59.10

83

19.48

93.

70.62

15.15

14.23

250

30

53.19

78

20.34

94.

70.62

15.15

14.23

250

60

52.76

80

21.03

95.

70.62

15.15

14.23

250

180

51.42

83

22.39

96.

Filamentous algae

(H. reticulatum)

77.16

13.25

9.59

150

60

72

85.68

18.29

(Park et al. 2018)

97.

77.16

13.25

9.59

180

60

69

83.49

18.59

98.

77.16

13.25

9.59

210

60

60

81.6

20.9

99.

77.16

13.25

9.59

240

60

48

72.96

23.32

100.

77.16

13.25

9.59

270

60

37

61.05

25.4

101.

microalgae

(Chlorella Vulgaris)

85.81

4.55

9.64

150

60

71

73.84

24.78

102.

85.81

4.55

9.64

180

60

66

75.24

27.12

103.

85.81

4.55

9.64

210

60

66

82.5

29.82

104.

85.81

4.55

9.64

240

60

59

80.24

32.48

105.

85.81

4.55

9.64

270

60

50

72.5

34..53

106.

WWTP sewage sludge

66.87

26.06

7,07

150

60

94

98.7

17.29

107.

66.87

26.06

7.07

180

60

91

96.46

17.48

108.

66.87

26.06

7.07

210

60

88

97.68

18.3

109.

66.87

26.06

7.07

240

60

67

69.68

17.16

110.

66.87

26.06

7.07

270

60

51

51

16.41

111.

Swine manure

55.3

36.1

8.6

200

60

67

76.22

12.4

(Xiong et al. 2019)

112.

55.3

36.1

8.6

220

60

57.4

67.41

12.8

113.

55.3

36.1

8.6

240

60

56.6

71.14

13.7

114.

55.3

36.1

8.6

260

60

62

90.44

15.9

115.

55.3

36.1

8.6

280

60

50.4

73.98

16