Sample | Yield (%) | Ash content (%) | Zeta potential | Elemental composition | Pore properties | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C (%) | H (%) | O (%) | N (%) | S (%) | H/C | O/C | (O + N)/C | BET surface area (m2/g) | Pore volume (cm3/g) | Pore diameter (nm) | ||||
RHH | 47.10 | 10.43 | − 19.5 | 45.01 | 5.04 | 38.35 | 1.13 | 0.04 | 1.34 | 0.64 | 0.66 | 13.83 | 0.04 | 3.07 |
RHHK0.2 | 44.85 | 7.00 | − 21.1 | 48.44 | 5.19 | 38.50 | 0.82 | 0.05 | 1.29 | 0.60 | 0.61 | 13.23 | 0.39 | 3.24 |
RHHK0.6 | 43.48 | 7.90 | − 27.2 | 53.33 | 5.48 | 32.22 | 1.00 | 0.07 | 1.23 | 0.45 | 0.47 | 16.33 | 0.06 | 3.72 |
RHHK1 | 38.83 | 8.20 | − 32.8 | 52.93 | 5.09 | 32.61 | 1.02 | 0.15 | 1.15 | 0.46 | 0.48 | 18.04 | 0.05 | 2.96 |
RHHCa0.2 | 47.02 | 10.80 | − 10.9 | 51.26 | 5.18 | 31.77 | 0.93 | 0.06 | 1.21 | 0.46 | 0.48 | 13.75 | 0.05 | 3.52 |
RHHCa0.6 | 43.09 | 14.67 | − 16.5 | 58.30 | 4.64 | 21.14 | 1.17 | 0.08 | 0.96 | 0.27 | 0.29 | 37.58 | 0.14 | 4.18 |
RHHCa1 | 42.10 | 15.00 | − 20.1 | 58.25 | 4.56 | 20.81 | 1.28 | 0.10 | 0.94 | 0.27 | 0.29 | 45.97 | 0.23 | 5.43 |
RHHFe0.2 | 30.59 | 13.28 | − 12.2 | 58.71 | 4.65 | 22.55 | 0.73 | 0.08 | 0.95 | 0.29 | 0.30 | 45.16 | 0.24 | 5.87 |
RHHFe0.6 | 29.17 | 15.00 | − 25.7 | 53.09 | 4.06 | 27.30 | 0.46 | 0.09 | 0.92 | 0.39 | 0.39 | 42.26 | 0.23 | 5.94 |
RHHFe1 | 28.97 | 15.40 | − 36.2 | 54.47 | 3.96 | 25.65 | 0.40 | 0.12 | 0.87 | 0.35 | 0.36 | 36.27 | 0.22 | 6.55 |