Effect of pyrolysis parameters on the biochar reactivity in the N-absorption reaction of chemical looping ammonia generation

Liu, Zhongyuan; Yu, Qingbo; Gao, Jinchao; Zhao, Jiatai; Duan, Wenjun

doi:10.1016/j.energy.2024.133321

Energy

2024

DOI: 10.1016/j.energy.2024.133321

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Effect of pyrolysis parameters on the biochar reactivity in the N-absorption reaction of chemical looping ammonia generation

Zhongyuan Liu,

Qingbo Yu,

Jinchao Gao

et al.

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2024

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Experimental and Kinetic Study of Biochar in N-Absorption Reaction of Chemical Looping Ammonia Generation

Liu,

Yu,

Xie

et al. 2024

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The study conducted isothermal tests for biochar-based N-absorption reaction in Chemical Looping Ammonia Generation to investigate the factors affecting biochar conversion, the kinetic model, and the reaction mechanism. The results show that the N2 gas flows had little effect on biochar conversion. Raising the reaction temperature and the molar ratio of α-Al2O3 to C enhanced the conversion of biochar. When the N2 flow rate was set to 200 mL/min, the reaction temperature to 1600 °C, and the α-Al2O3/C molar ratio to 3:3, the biochar conversion reached its peak at 95.45%. After evaluating several kinetic models, the D1 diffusion model was found to provide the closest match to the biochar conversion. The activation energy decreased from 241.91 kJ/mol at a 1:3 α-Al2O3/C molar ratio to 146.77 kJ/mol at a 3:3 ratio with an increasing α-Al2O3/C molar ratio. The biochar’s high specific surface area and abundant pore structure facilitated a rapid reaction between carbon and oxygen on the carbon surface. Additionally, the diffusion of oxygen produced during the decomposition of α-Al2O3 became the limiting factor in the N-absorption reaction.

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Experimental and Kinetic Study of Biochar in N-Absorption Reaction of Chemical Looping Ammonia Generation

Liu,

Yu,

Xie

et al. 2024

Processes

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Effect of pyrolysis parameters on the biochar reactivity in the N-absorption reaction of chemical looping ammonia generation

Cited by 1 publication

References 32 publications

Experimental and Kinetic Study of Biochar in N-Absorption Reaction of Chemical Looping Ammonia Generation

Experimental and Kinetic Study of Biochar in N-Absorption Reaction of Chemical Looping Ammonia Generation

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