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<p>The relevance of the study is due to the need to increase the use of renewable energy sources in economy in order to reduce the harmful impact on the environment. <i>The purpose</i> of this work was to assess the feasibility of obtaining high-quality carbonaceous adsorbents from a granulated mixture of various plant wastes by a thermochemical method. <i>The objects</i> were samples of unsaleable piece birch wood, walnut shells, sunflower seed husks, flax shives, and anthracite coal. <i>The methods</i> included physical experiments on conductive pyrolysis, steam activation, and differential thermal analysis. The ash content and moisture content of the samples were determined in accordance with State Standards GOST R 56881-2016 and GOST 33503-2015. Nitrogen adsorption isotherms were measured with a NOVA 1200e analyzer. The equilibrium activity for toluene was determined in accordance with GOST 8703-74; the adsorption activity for iodine, GOST 6217-74; the density of granules, GOST 15139-69. <i>Results.</i> Optimal parameters for obtaining carbonaceous adsorbents from granules of plant raw materials were established. The specific yields of pyrolysis products of a mixture of plant raw materials with pyrolysis resin were found. The specific yield of carbonization products of the granulated compacted mass showed a 25% increase compared to the uncompacted mixture of plant raw materials. It was shown that the most significant parameters influencing the development of the microporous structure of carbon granules produced from the compacted mass of plant raw materials are the density of the initial granules of plant raw materials and the degree of burnout of the activated carbonizates. The optimal parameters for obtaining activated carbon with the highest adsorption capacity are granules with a density of 1200 kg/m<sup>3</sup> and a carbonization product burnout rate of 70%. It was established that the adsorbent samples obtained from granules of plant raw materials have high adsorption characteristics, comparable to activated carbons obtained from fossil raw materials.</p>

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Characteristics of Granular Activated Carbon Produced from a Mixture of Plant Waste Raw Materials

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • R. G. Safin,
  • V. G. Sotnikov

摘要

The relevance of the study is due to the need to increase the use of renewable energy sources in economy in order to reduce the harmful impact on the environment. The purpose of this work was to assess the feasibility of obtaining high-quality carbonaceous adsorbents from a granulated mixture of various plant wastes by a thermochemical method. The objects were samples of unsaleable piece birch wood, walnut shells, sunflower seed husks, flax shives, and anthracite coal. The methods included physical experiments on conductive pyrolysis, steam activation, and differential thermal analysis. The ash content and moisture content of the samples were determined in accordance with State Standards GOST R 56881-2016 and GOST 33503-2015. Nitrogen adsorption isotherms were measured with a NOVA 1200e analyzer. The equilibrium activity for toluene was determined in accordance with GOST 8703-74; the adsorption activity for iodine, GOST 6217-74; the density of granules, GOST 15139-69. Results. Optimal parameters for obtaining carbonaceous adsorbents from granules of plant raw materials were established. The specific yields of pyrolysis products of a mixture of plant raw materials with pyrolysis resin were found. The specific yield of carbonization products of the granulated compacted mass showed a 25% increase compared to the uncompacted mixture of plant raw materials. It was shown that the most significant parameters influencing the development of the microporous structure of carbon granules produced from the compacted mass of plant raw materials are the density of the initial granules of plant raw materials and the degree of burnout of the activated carbonizates. The optimal parameters for obtaining activated carbon with the highest adsorption capacity are granules with a density of 1200 kg/m3 and a carbonization product burnout rate of 70%. It was established that the adsorbent samples obtained from granules of plant raw materials have high adsorption characteristics, comparable to activated carbons obtained from fossil raw materials.