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<p>The global concern over stubble burning and its consecutive effect on the climate has caused researchers to find an effective solution. The present research attempts to provide a solution for disposing of agricultural waste (paddy straw) in an environmentally friendly manner. The experimental setup is a continuous-feeding plasma pyrolysis system for thermochemical conversion of paddy straw at 650–900&#xa0;°C efficiently. This work also efforts to take the opportunity to assess waste as a resource and to develop valuables from it. The treated waste produces gas, a significant product and biochar as a solid residue. The influence of process temperature on the different parameters, such as gas composition, cold gas efficiency, and gas yield, was studied to progress, considering the performance of paddy straw plasma pyrolysis. The primary gases found in the pyrolysis gas consist of CO, H<sub>2</sub>, CH<sub>4</sub>, and CO<sub>2</sub>. The process temperature influenced the gas composition with the variation in CO (47–62%) and H<sub>2</sub> (11–17%). The LHV of the gas also improved from 9.2 to 11.5&#xa0;MJ Nm<sup>−3</sup> with the upsurge in temperature. A thermodynamic analysis was performed at different process temperatures. The efficiency for energy and exergy follows a similar pattern, and alignment increases with the increase in process temperature. Plasma pyrolysis effectively mitigates the release of harmful emissions, signifying its suitability as a waste management strategy. The overall performance of the paddy straw for the plasma pyrolysis was comparatively better at 850&#xa0;°C. These encouraging results suggest plasma pyrolysis could be a viable alternative to stubble burning.</p>

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Using paddy straw as an eco-friendly feedstock for plasma pyrolysis treatment: addressing stubble-burning challenges

  • 期刊论文

  • 发表日期：

    2025年11月9日

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  • Sidhartha Sondh,
  • Darshit S. Upadhyay,
  • Sanjay S. Patel,
  • Rajesh N. Patel

摘要

The global concern over stubble burning and its consecutive effect on the climate has caused researchers to find an effective solution. The present research attempts to provide a solution for disposing of agricultural waste (paddy straw) in an environmentally friendly manner. The experimental setup is a continuous-feeding plasma pyrolysis system for thermochemical conversion of paddy straw at 650–900 °C efficiently. This work also efforts to take the opportunity to assess waste as a resource and to develop valuables from it. The treated waste produces gas, a significant product and biochar as a solid residue. The influence of process temperature on the different parameters, such as gas composition, cold gas efficiency, and gas yield, was studied to progress, considering the performance of paddy straw plasma pyrolysis. The primary gases found in the pyrolysis gas consist of CO, H2, CH4, and CO2. The process temperature influenced the gas composition with the variation in CO (47–62%) and H2 (11–17%). The LHV of the gas also improved from 9.2 to 11.5 MJ Nm−3 with the upsurge in temperature. A thermodynamic analysis was performed at different process temperatures. The efficiency for energy and exergy follows a similar pattern, and alignment increases with the increase in process temperature. Plasma pyrolysis effectively mitigates the release of harmful emissions, signifying its suitability as a waste management strategy. The overall performance of the paddy straw for the plasma pyrolysis was comparatively better at 850 °C. These encouraging results suggest plasma pyrolysis could be a viable alternative to stubble burning.