Zero/negative carbon emission coal and biomass staged co-gasification power generation system via biomass heating

Yang, Dongtai; Li, Sheng; He, Song

doi:10.1016/j.apenergy.2023.122469

Cited by 9 publications

(1 citation statement)

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“…China is the largest coal producer and consumer, with Xinjiang accounting for approximately 40% , However, traditional coal combustion has resulted in significant CO 2 emissions, necessitating the development of efficient and clean coal utilization technologies. , Biomass, as a sustainable and carbon-neutral energy source, has garnered global attention as a potential substitute for fossil fuels. , Nevertheless, only a small portion of the annual 20 billion tons of biomass residues from agriculture and forestry are efficiently utilized. It is leading to substantial waste .…”

Section: Introductionmentioning

confidence: 99%

Co-pyrolysis Behavior of Coal and Biomass: Synergistic Effect and Kinetic Analysis

Liu,

Huang,

Huang

et al. 2024

ACS Omega

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Co-pyrolysis of coal and biomass is an efficient way to utilize resources. This study investigates the co-pyrolysis behavior and kinetics of coal and biomass using thermogravimetric analysis (TGA) and TG-FTIR. Co-pyrolysis of coal and biomass exhibits a synergistic effect. When the biomass is 25%, the weight loss increases, showing a positive synergistic effect. When the biomass is 50%, it exhibits a negative synergistic effect. Increasing the heating rate can promote the generation of a synergistic effect. Co-pyrolysis involves two central pyrolysis stages: stage III (250− 380 °C) and stage IV (380−550 °C). Friedman, FWO, KAS, and STA methods are used to calculate the activation energy for stages III and IV. The activation energy (E α ) for co-pyrolysis is higher than that for coal or biomass pyrolysis alone. A positive synergistic effect is observed in stage III, while a negative synergistic effect is noted in stage IV. The master curve method determines an accurate reaction order (n) and pre-exponential factor (A) value of Coal75-Bio25. In stage III, E α = 238.81 kJ/mol, n = 2.4, A = 1.30 × 10 21 s −1 . In stage IV, E α = 37 8.01 kJ/mol, n = 4.0, A = 1.10 × 10 27 s −1 . The kinetic parameters in stage IV are significantly higher than those in stage III. TG-FTIR is used to analyze the synergistic effect of co-pyrolysis. Compared with coal and biomass pyrolysis separately, the Coal75-Bio25 pyrolysis process releases less CO 2 and more CH 4 . These findings support the synergistic effect of coal and biomass during co-pyrolysis.

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