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<p>Hydrogenolysis of plentiful lignin offers a sustainable approach to producing aromatic renewable feedstocks and intermediates for biofuels. This study demonstrates that a low-cost catalyst derived from Li-ion cell-phone battery waste can serve as an excellent substitute to expensive noble metal catalysts for the hydrogenolysis of alkali and methanol-fractionated lignin, yielding phenols. Catalyst was prepared by pyrolyzing the electrode coating in spent Motorola SNN5749A, 3.6&#xa0;V cellphone batteries at 600&#xa0;°C in air and was characterized as LiCo<sub>0.9</sub>O<sub>x</sub> on graphite carbon using elemental analysis, SEM, EDX, XRD and XPS. The hydrogenolysis of alkali lignin and methanol fractionated alkali lignin in methanol produced liquefaction yields of 62 and 73% respectively in a process using 10% catalyst loading (w/w), 5.5 MPa H<sub>2</sub>, 300&#xa0;°C for 4.0&#xa0;h. The major products obtained from alkali lignin were 2-methoxy-phenol (<i>o</i>-guaiacol), 4-methyl-phenol (<i>p</i>-cresol) and 4-methoxy-phenol (<i>p</i>-guaiacol) in 35, 25 and 15% selectivities, respectively. The same three major products were observed in hydrogenolysis of MeOH fractionated alkali lignin in 34, 27 and 20% selectivities. Reuse of LiCo<sub>0.9</sub>O<sub>x</sub>/C catalyst showed a small gradual decline in catalytic activity resulting in a 73 to 58% decrease in MeOH fractionated alkali liquefaction yield after four cycles.</p>

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Hydrogenolysis of alkali lignin using spent cell-phone battery electrode coating derived lithium cobalt oxide on carbon catalyst

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月19日

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  • Ananda S. Amarasekara,
  • Gabriel Murillo Morales,
  • Ambar B. Shrestha,
  • Tony L. Grady

摘要

Hydrogenolysis of plentiful lignin offers a sustainable approach to producing aromatic renewable feedstocks and intermediates for biofuels. This study demonstrates that a low-cost catalyst derived from Li-ion cell-phone battery waste can serve as an excellent substitute to expensive noble metal catalysts for the hydrogenolysis of alkali and methanol-fractionated lignin, yielding phenols. Catalyst was prepared by pyrolyzing the electrode coating in spent Motorola SNN5749A, 3.6 V cellphone batteries at 600 °C in air and was characterized as LiCo0.9Ox on graphite carbon using elemental analysis, SEM, EDX, XRD and XPS. The hydrogenolysis of alkali lignin and methanol fractionated alkali lignin in methanol produced liquefaction yields of 62 and 73% respectively in a process using 10% catalyst loading (w/w), 5.5 MPa H2, 300 °C for 4.0 h. The major products obtained from alkali lignin were 2-methoxy-phenol (o-guaiacol), 4-methyl-phenol (p-cresol) and 4-methoxy-phenol (p-guaiacol) in 35, 25 and 15% selectivities, respectively. The same three major products were observed in hydrogenolysis of MeOH fractionated alkali lignin in 34, 27 and 20% selectivities. Reuse of LiCo0.9Ox/C catalyst showed a small gradual decline in catalytic activity resulting in a 73 to 58% decrease in MeOH fractionated alkali liquefaction yield after four cycles.