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<p>In this study, hydrothermal liquefaction (HTL) of <i>Cyperus pangorei</i> biomass was studied for bio-oil production and the operational conditions were subjected to Response Surface Methodology (RSM) experiments coupled with central composite design. Initially, the HTL experiments were performed at temperature (240 to 320&#xa0;°C), TiO<sub>2</sub>/MWCNTs catalyst (0.1 to 0.5 wt%), solvent to biomass ratio (100 to 200&#xa0;g/L), solvent (water and ethanol) mixture (0:1, 1:0, 1:1, 1:2, 1:3, 2:1 and 3:1) at pressure of 5&#xa0;MPa and time of 60&#xa0;min. Maximum bio-oil yield was 33.89 wt% at solvent to biomass ratio of 180&#xa0;g/L at temperature 280&#xa0;°C, catalyst load of 0.3 wt% and water to ethanol of 1:2 ratio at 60&#xa0;min. Bio-oil had HHV of 30.37&#xa0;MJ/Kg with H/C and O/C of 1.01and 0.19 respectively. Total Energy recovery ratio (ERR) of bio-oil and biochar was 56.12% individually. Among various parameters, catalyst load showed the highest significant impact on the bio-oil yield due to the low <i>P</i>-value and high F-value in ANOVA analysis. Major compounds (tetradecanoic acid, hexadecanonic acid and hydrolyzed benzenes) identified in HTL bio-oil are categorized as hydrocarbons, oxyacid and esters. The present results show that HTL supproted RSM studies are a promising approach to convert <i>Cyperus pangorei</i> biomass to high quality bio-oil via process efficient sustainable strategies.&#xa0;This study paves futuristic directions towards eco-friendly practices, green initiatives and sustainable waste management.</p>

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Effect of catalytic (MWCNTs/TiO2) hydrothermal liquefaction of Cyperus pangorei biomass on bio-oil yield: optimization through response surface methodology (RSM), a step towards SDG 7

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • C. Marimuthu,
  • J. Arun,
  • A. Swetha,
  • S. ShriVigneshwar,
  • J. Jayakanth,
  • P. Priyadharsini,
  • Salim Al Jadidi,
  • S. Naveen

摘要

In this study, hydrothermal liquefaction (HTL) of Cyperus pangorei biomass was studied for bio-oil production and the operational conditions were subjected to Response Surface Methodology (RSM) experiments coupled with central composite design. Initially, the HTL experiments were performed at temperature (240 to 320 °C), TiO2/MWCNTs catalyst (0.1 to 0.5 wt%), solvent to biomass ratio (100 to 200 g/L), solvent (water and ethanol) mixture (0:1, 1:0, 1:1, 1:2, 1:3, 2:1 and 3:1) at pressure of 5 MPa and time of 60 min. Maximum bio-oil yield was 33.89 wt% at solvent to biomass ratio of 180 g/L at temperature 280 °C, catalyst load of 0.3 wt% and water to ethanol of 1:2 ratio at 60 min. Bio-oil had HHV of 30.37 MJ/Kg with H/C and O/C of 1.01and 0.19 respectively. Total Energy recovery ratio (ERR) of bio-oil and biochar was 56.12% individually. Among various parameters, catalyst load showed the highest significant impact on the bio-oil yield due to the low P-value and high F-value in ANOVA analysis. Major compounds (tetradecanoic acid, hexadecanonic acid and hydrolyzed benzenes) identified in HTL bio-oil are categorized as hydrocarbons, oxyacid and esters. The present results show that HTL supproted RSM studies are a promising approach to convert Cyperus pangorei biomass to high quality bio-oil via process efficient sustainable strategies. This study paves futuristic directions towards eco-friendly practices, green initiatives and sustainable waste management.