Integrated photocatalytic Process for Lactic Acid synthesis from Sugarcane Leaf (Saccharum officinarum): Biomass delignification and photocatalytic Conversion with oxygen-doped graphitic carbon nitride

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-05-28 DOI:10.1016/j.jtice.2025.106193

Alice Jasmine David , Han Sen Soo , Tamilarasan Krishnamurthi

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引用次数: 0

Abstract

Background

Photocatalytic upcycling of agro-biomass represents an advanced approach for simultaneously producing high-value products and managing organic waste. However, its commercial viability remains suboptimal, primarily due to challenges in developing efficient photocatalysts. The regulation and optimization of photocatalyst performance play a crucial role in enhancing biomass conversion efficiency and improving platform chemical production.

Methods

This study investigates the efficiency of microwave-assisted seawater treatment for lignin fractionation from Saccharum officinarum leaf (SCL) biomass and its integration with high-value organic acid synthesis in a photobiorefinery framework. The treatment using seawater with sodium carbonate (SW-SC) exhibited superior fractionation performance, yielding 79.20 wt % cellulose in the treated SCL biomass (TSCL), which is enhancing its suitability for further conversion. Various oxygen-doped g-C₃N₄ photocatalysts were synthesized through oxygen coupling, among the g-C₃N₄-O_{50 %} exhibiting the highest photocatalytic activity. Under alkaline conditions, the photocatalytic conversion of TSCL resulted in a maximum lactic acid (LA) yield of 345.39 mg g⁻¹ TSCL and a formic acid (FA) yield of 30.45 mg g⁻¹ TSCL..

Significant Findings

The one-thousand-fold scale-up experiment demonstrated the feasibility of industrial lactic acid production using this reaction system, considering its favorable reaction conditions, economic viability, and environmental benefits. This study introduces a novel photocatalytic approach for the selective oxidation of biomass-derived monosaccharides into lactic acid.

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甘蔗叶合成乳酸的集成光催化工艺：生物质脱木质素和氧掺杂石墨氮化碳光催化转化

农业生物质的光催化升级循环是一种同时生产高价值产品和管理有机废物的先进方法。然而，其商业可行性仍然不理想，主要是由于开发高效光催化剂的挑战。光催化剂性能的调控与优化对提高生物质转化效率、提高平台化工产量具有重要意义。方法研究了微波辅助海水处理对甘蔗叶片（SCL）生物质木质素分离的效率及其与光生物炼制框架下高价值有机酸合成的结合。海水加碳酸钠（SW-SC）处理的SCL生物质（TSCL）的分馏性能较好，纤维素的产出率为79.20 wt %，增强了其进一步转化的适用性。通过氧偶联法合成了多种氧掺杂的g-C₃N₄光催化剂，其中g-C₃N₄- o50%的光催化活性最高。在碱性条件下，TSCL光催化转化的乳酸（LA）产率最高可达345.39 mg g⁻（TSCL），甲酸（FA）产率最高可达30.45 mg g⁻（TSCL）。重要发现一千倍的放大实验证明，该反应体系具有良好的反应条件、经济可行性和环境效益，可用于工业生产乳酸。本研究介绍了一种新的光催化方法，用于选择性氧化生物质单糖生成乳酸。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.