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Synergistic effects, gaseous products, and evolutions of NOx precursors during (co-)pyrolysis of textile dyeing sludge and bamboo residues.
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2020-06-29 , DOI: 10.1016/j.jhazmat.2020.123331
Jinwen Hu 1 , Yueyao Song 1 , Jingyong Liu 1 , Fatih Evrendilek 2 , Musa Buyukada 3 , Youping Yan 1
Affiliation  

This study aimed to investigate the synergistic influences of the textile dyeing sludge (TDS) and bamboo residues (BR) co-pyrolysis, and its effects on the formation mechanisms of NH3 and HCN. The mass loss rate was lower for TDS than BR, with the co-pyrolysis with 50% BR exerting the strongest synergistic effect. The pyrolysis stages 1 (< 400 °C) and 2 (400−800 °C) were best described using the diffusion and third-order reaction mechanisms, respectively. Activation energy and frequency factor were lower for the pyrolysis of TDS than BR. The addition of no less than 50% BR significantly increased the emissions of CO2, CO, CH4, CO, and CO and reduced the aromatic compounds. The thermal stability of N-A structure was lower in TDS than BR. The co-pyrolysis with 50% BR significantly inhibited the formations of NH3 and HCN and improved the aromaticity of biochar. This may due to the weakened hydrogenation reaction at N sites, the enhanced conversion of NH3, the inhibition of the ring cleavage in the char-secondary cracking, and the formation of more quaternary-N. Our results provide insights into the co-treatment of TDS and BR, and controls over NOx precursors for a cleaner energy production.



中文翻译:

纺织品染色污泥和竹渣的(共)热解过程中的协同效应,气态产物和NOx前体的演变。

本研究旨在探讨纺织品染色污泥(TDS)和竹残渣(BR)共热解的协同作用及其对NH 3和HCN形成机理的影响。TDS的质量损失率低于BR,与50%BR的共热解具有最强的协同作用。分别使用扩散和三级反应机理可以最好地描述热解阶段1(<400°C)和2(400-800°C)。TDS热解的活化能和频率因子均低于BR。添加不少于50%的BR会显着增加CO 2,CO,CH 4,C O和C的排放O和还原的芳族化合物。TDS中NA结构的热稳定性低于BR。与50%BR共热解显着抑制了NH 3和HCN的形成,并改善了生物炭的芳香性。这可能是由于N位处的氢化反应减弱,NH 3的转化率提高,炭二次裂化中环裂解的抑制以及更多季N的形成。我们的研究结果提供深入的合作,处理TDS和BR的,超过NO控制X前体清洁能源的生产。

更新日期:2020-07-09
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