Scholarlink

<p>Biomass from agro-industrial waste is a vital renewable resource for addressing energy and environmental challenges. Hydrothermal carbonization (HTC) is utilized to produce hydrochar from various materials, including these wastes, for environmental remediation and other industrial applications. In this work, the effects of temperature and treatment time on the solid and liquid obtained from the application of the HTC process to grape stalks were assessed. The energetic properties of the hydrochar, its physico-chemistry, and that of the activated carbons prepared with it were evaluated by proximate analysis, higher heating value (HHV), BET area, pore volume, FTIR, and SEM. Temperature significantly impacted the hydrochar’s mass yield (50%), while time had minimal effect. The hydrochars’ energy yield was about 70%, with an HHV value of 26.21&#xa0;MJ/kg. The activated carbons produced from grape stalk hydrochar, using KOH and H<sub>3</sub>PO<sub>4</sub>, exhibited BET areas of 1630 and 1800 m<sup>2</sup>/g, respectively, highlighting their potential as adsorbents and or energetic applications. Meanwhile, the liquid fraction emerged as a potential source of antioxidant compounds due to the presence of phenols and flavonoids. The highest concentration of phenolic compounds (TPC) was obtained at 240&#xa0;°C for 10&#xa0;h TPC (1310.17&#xa0;mM GAE/100&#xa0;g dw), and the highest of flavonoids (TFC) at 180&#xa0;°C for 2&#xa0;h (39&#xa0;mm QE/100&#xa0;g dw). Antioxidant capacity was determined by DPPH scavenging activity and ferric-reducing antioxidant power assay (FRAP). These results present genuine possibilities for the technological application of the products derived from this simple process, pending the completion of complementary studies.</p> Graphical Abstract <p></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

Grape stalks as a renewable source for the production of value-added products: application of hydrothermal carbonization, analysis of the process and products

  • 期刊论文

  • 发表日期：

    2025年2月21日

查看全文
  • Marianela Gimenez Guerrero,
  • Lorena C. Luna,
  • Karim Sapag,
  • Gabriela E. Feresin,
  • Cristina Deiana

摘要

Biomass from agro-industrial waste is a vital renewable resource for addressing energy and environmental challenges. Hydrothermal carbonization (HTC) is utilized to produce hydrochar from various materials, including these wastes, for environmental remediation and other industrial applications. In this work, the effects of temperature and treatment time on the solid and liquid obtained from the application of the HTC process to grape stalks were assessed. The energetic properties of the hydrochar, its physico-chemistry, and that of the activated carbons prepared with it were evaluated by proximate analysis, higher heating value (HHV), BET area, pore volume, FTIR, and SEM. Temperature significantly impacted the hydrochar’s mass yield (50%), while time had minimal effect. The hydrochars’ energy yield was about 70%, with an HHV value of 26.21 MJ/kg. The activated carbons produced from grape stalk hydrochar, using KOH and H3PO4, exhibited BET areas of 1630 and 1800 m2/g, respectively, highlighting their potential as adsorbents and or energetic applications. Meanwhile, the liquid fraction emerged as a potential source of antioxidant compounds due to the presence of phenols and flavonoids. The highest concentration of phenolic compounds (TPC) was obtained at 240 °C for 10 h TPC (1310.17 mM GAE/100 g dw), and the highest of flavonoids (TFC) at 180 °C for 2 h (39 mm QE/100 g dw). Antioxidant capacity was determined by DPPH scavenging activity and ferric-reducing antioxidant power assay (FRAP). These results present genuine possibilities for the technological application of the products derived from this simple process, pending the completion of complementary studies.

Graphical Abstract