Scholarlink

<p>The co-pyrolysis characteristics of low-rank coal and biomass were systematically investigated via thermo-gravimetric analysis and Fourier transform infrared spectroscopy, complemented by polycyclic aromatic hydrocarbons emission quantification using gas chromatography-mass spectrometry. For the first time, the study revealed a novel synergetic compensation mechanism between activation energy and pre-exponential factor during co-pyrolysis. Thermogravimetry (TG) analysis identified three distinct pyrolysis stages, where the activation energy (Ea) and pre-exponential factor (A) showed synchronous trends (r²&gt;0.95), indicating kinetic compensation. Specifically, herb residue addition reduced the overall activation energy of coal pyrolysis by 12.5&#xa0;kJ⋅mol<sup>− 1</sup>, enhancing reaction activity. Real-time FTIR monitoring confirmed that CO₂, CO, and CH₄ were the dominant gaseous products, with H₂O and HCl emissions closely correlated with differential thermogravimetry (DTG) peaks. The addition of dregs to increase the escape of combustible gases, which is conducive to the overflow of pyrolysis gas to the combustion chamber at the end of the combustion of premixed combustion, diffusion and mixing conditions are greatly improved. Notably, the co-pyrolysis process achieved a 21.01% reduction in total PAHs emission (from 126.58 to 99.98&#xa0;µg/g) compared to pure coal pyrolysis, primarily attributed to the suppression of PAHs via hydrogen donation from biomass. This work provides a green strategy for upgrading low-rank coal while minimizing environmental risks.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synergistic mechanisms in gas release and kinetic behavior during co-pyrolysis of coal and biomass

  • 期刊论文

  • 发表日期：

    2026年1月23日

查看全文
  • Zhenkun Guo,
  • Xiaofeng Chen,
  • Mengyuan Liu,
  • Haocheng He,
  • Feiran Song,
  • Juan Chen,
  • Shuxun Sang,
  • Jianjun Wu

摘要

The co-pyrolysis characteristics of low-rank coal and biomass were systematically investigated via thermo-gravimetric analysis and Fourier transform infrared spectroscopy, complemented by polycyclic aromatic hydrocarbons emission quantification using gas chromatography-mass spectrometry. For the first time, the study revealed a novel synergetic compensation mechanism between activation energy and pre-exponential factor during co-pyrolysis. Thermogravimetry (TG) analysis identified three distinct pyrolysis stages, where the activation energy (Ea) and pre-exponential factor (A) showed synchronous trends (r²>0.95), indicating kinetic compensation. Specifically, herb residue addition reduced the overall activation energy of coal pyrolysis by 12.5 kJ⋅mol− 1, enhancing reaction activity. Real-time FTIR monitoring confirmed that CO₂, CO, and CH₄ were the dominant gaseous products, with H₂O and HCl emissions closely correlated with differential thermogravimetry (DTG) peaks. The addition of dregs to increase the escape of combustible gases, which is conducive to the overflow of pyrolysis gas to the combustion chamber at the end of the combustion of premixed combustion, diffusion and mixing conditions are greatly improved. Notably, the co-pyrolysis process achieved a 21.01% reduction in total PAHs emission (from 126.58 to 99.98 µg/g) compared to pure coal pyrolysis, primarily attributed to the suppression of PAHs via hydrogen donation from biomass. This work provides a green strategy for upgrading low-rank coal while minimizing environmental risks.