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<p>This study investigates the production of lactic acid from glycerol, a byproduct of biodiesel production, using CaO as a catalyst. CaO was synthesized from marble waste powder by treating it with nitric acid and then calcining it at 850&#xa0;°C. Several analytical techniques, including XRD, TEM-EDS, BET surface area analysis, and FTIR, were employed to study the morphology, crystal size, surface area, pore size, and particle size distribution of the synthesized Cao. The chemical reactions took place in a batch reactor. The optimal reaction parameters were a molar ratio of CaO to glycerol of 0.3, temperature of 290&#xa0;°C, and a reaction time of 150 min. The reaction products were analysed using HPLC and GC. The maximum yield of lactic acid obtained was 43 mol%, and amount of H<sub>2</sub> produced was 5.25 mol. Other products formed included isovaleric acid and acetic acid.</p> Graphical abstract <p></p>

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Valorization of glycerol into lactic acid and hydrogen using CaO catalyst derived from marble waste

  • 期刊论文

  • 发表日期：

    2025年6月17日

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  • Mohd Mohsin Ikram,
  • Virendra Kumar Saharan

摘要

This study investigates the production of lactic acid from glycerol, a byproduct of biodiesel production, using CaO as a catalyst. CaO was synthesized from marble waste powder by treating it with nitric acid and then calcining it at 850 °C. Several analytical techniques, including XRD, TEM-EDS, BET surface area analysis, and FTIR, were employed to study the morphology, crystal size, surface area, pore size, and particle size distribution of the synthesized Cao. The chemical reactions took place in a batch reactor. The optimal reaction parameters were a molar ratio of CaO to glycerol of 0.3, temperature of 290 °C, and a reaction time of 150 min. The reaction products were analysed using HPLC and GC. The maximum yield of lactic acid obtained was 43 mol%, and amount of H2 produced was 5.25 mol. Other products formed included isovaleric acid and acetic acid.

Graphical abstract