Kinetic and Thermodynamic Analyses of Sugar Cane Bagasse and Sewage Sludge Co-pyrolysis Process

Zeeshan Hameed, Zaeem Aman, Salman Raza Naqvi*, Rumaisa Tariq, Imtiaz Ali, Anas A. Makki

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    23 Citations (Scopus)

    Abstract

    This study investigates the co-pyrolysis of sugar cane bagasse (B), sewage sludge (S), and their blends of different proportions (100% B, 70% B/30% S, 50% B/50% S, 30% B/70% S, and 100% S) through thermogravimetric analysis-differential thermal analysis at 20 °C/min. The purpose of this study to assess the synergistic effect of the addition of sugar cane bagasse into sewage sludge and investigate the co-pyrolysis process kinetics and thermodynamics by employing five major reaction mechanisms with 17 models using the Coats and Redfern method. The kinetic result indicates a synergistic effect of bagasse and sewage sludge. The active co-pyrolysis zone was divided into two reaction zones: zone I (200-400 °C) and zone II (400-600 °C). In both zones, 100% bagasse has the highest Ea (F1-F3, 20.77-106.54 kJ/mol; D1-D4, 1.59-89.27 kJ/mol; N1-N4, 2.33-43.69 kJ/mol; and P0.5-Pi, 2.15-39.88 kJ/mol) and A (F1-F3, 2.22 × 10+2-6.4 × 10+10 min-1; D1-D4, 3.20 × 10+2-3.72 × 10+2 min-1; N1-N4, 2.33 × 10+2-3.20 × 10+2 min-1; and P0.5-Pi, 2.33 × 10+2-3.20 × 10+2 min-1) compared to 100% sewage sludge Ea (F1-F3, 6.20-51.06 kJ/mol; D1-D4, 1.85-68.01 kJ/mol; N1-N4, 2.07-32.06 kJ/mol; and P0.5-Pi, 0.91-29.25 kJ/mol) and A (F1-F3, 2.66 × 10+2-4.0 × 10+2 min-1; D1-D4, 2.66 × 10+2-4.32 × 10+2 min-1; N1-N4, 2.06 × 10+2-2.66 × 10+2 min-1; and P0.5-Pi, 2.06 × 10+2-2.66 × 10+2 min-1) for all reaction mechanisms. Among blends in zones I and II, 70% B/30% S showed the highest Ea (F1-F3, 17.15-82.77 kJ/mol; D1-D4, 4.34-89.15 kJ/mol; N1-N4, 1.83-42.44 kJ/mol; and P0.5-Pi, 2.27-39.82 kJ/mol) and A (F1-F3, 2.24 × 10+2-3.40 × 10+2 min-1; D1-D4, 4.76 × 10+2-12 × 10+5 min-1; N1-N4, 2.32 × 10+2-2.43 × 10+2 min-1; and P0.5-Pi, 2.32 × 10+2-2.34 × 10+2 min-1) compared to all other blends for all reaction mechanisms.

    Original languageEnglish
    Pages (from-to)9551-9558
    Number of pages8
    JournalEnergy and Fuels
    Volume32
    Issue number9
    DOIs
    Publication statusPublished - 20 Sep 2018

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