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<p>This study investigates nickel tungstate (NiWO₄) as a regenerable oxygen carrier for enhancing thermochemical conversion of regionally significant agro-industrial residues: Onion peel (B1) and pine bark (B2) from Chihuahua, Mexico. Biomass characterization revealed B2 higher cellulose (43.80 ± 0.9%) and hemicellulose (22.40 ± 0.6%) content versus B1 lignin dominance (35.26 ± 1.8%). NiWO<sub>4</sub>, synthesized via co-precipitation, exhibited a monoclinic wolframite structure&#xa0;(54&#xa0;nm crystallites). Thermogravimetric analysis demonstrated superior conversion efficiency in NiWO₄/biomass mixtures (optimal ratios: 7:3 for B1, 6:4 for B2) over inert ZrO<sub>2</sub> controls, quantified by weight-loss differentials (X = 8.5% for B1; 7.1% for B2). Beyond 800&#xa0;°C, lattice oxygen release from NiWO<sub>4</sub> promoted biochar gasification via solid–solid interactions, yielding syngas (H<sub>2</sub>/CO/CO<sub>2</sub>). Redox cycling confirmed NiWO<sub>4</sub> regeneration from reduced phases (Ni/W/WO₂/WC) under steam, validating its sustainability for efficient biomass conversion. The presence of NiWO₄ promoted effective biomass decomposition and biochar gasification acting as an oxygen carrier.</p> Graphical abstract <p></p>

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Agro-industrial lignocellulosic biomass conversion assisted with NiWO4 as oxygen carrier

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Lucero Pérez Hernández,
  • Javier Eliel Morales Mendoza,
  • Jorge Luis Domínguez Arvizu,
  • Felipe Ángel Gaxiola Cebreros,
  • Iyiade Gbolahan Alalade,
  • Hammed Adeniyi Salami,
  • Cristian del Jesús Méndez Morales,
  • Jesús Manuel Castro Lozoya,
  • Gabriela Edith Valenzuela Castro,
  • José Luis Bueno Escobedo,
  • Blanca Cristina Hernández Majalca,
  • Alejandro López Ortiz,
  • Virginia Hidolina Collins Martínez

摘要

This study investigates nickel tungstate (NiWO₄) as a regenerable oxygen carrier for enhancing thermochemical conversion of regionally significant agro-industrial residues: Onion peel (B1) and pine bark (B2) from Chihuahua, Mexico. Biomass characterization revealed B2 higher cellulose (43.80 ± 0.9%) and hemicellulose (22.40 ± 0.6%) content versus B1 lignin dominance (35.26 ± 1.8%). NiWO4, synthesized via co-precipitation, exhibited a monoclinic wolframite structure (54 nm crystallites). Thermogravimetric analysis demonstrated superior conversion efficiency in NiWO₄/biomass mixtures (optimal ratios: 7:3 for B1, 6:4 for B2) over inert ZrO2 controls, quantified by weight-loss differentials (X = 8.5% for B1; 7.1% for B2). Beyond 800 °C, lattice oxygen release from NiWO4 promoted biochar gasification via solid–solid interactions, yielding syngas (H2/CO/CO2). Redox cycling confirmed NiWO4 regeneration from reduced phases (Ni/W/WO₂/WC) under steam, validating its sustainability for efficient biomass conversion. The presence of NiWO₄ promoted effective biomass decomposition and biochar gasification acting as an oxygen carrier.

Graphical abstract