Key Laboratory of Oasis Ecology of Ministry of Education, College of Resource and Environment Sciences, Xinjiang University, Urumchi 830046, China; State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment of Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment of Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; National Engineering Research Center of Protected Agriculture, Tongji University, Shanghai 200092, China.
Sci Total Environ. 2021 Jun 1;771:144891. doi: 10.1016/j.scitotenv.2020.144891. Epub 2021 Jan 27.
Microalgae residue was efficiently converted into lactic acid with a high yield (33.9%) under mild reaction conditions (210 °C, 2 h) over a Fe-Sn-Beta catalyst. Under the action of homogeneous HO and distinct Lewis acid sites on the catalyst, the production of lactic acid from microalgae residue underwent three main reaction steps: hydrolysis, isomerization, and retro-aldol condensation. Results demonstrated that the lipid component had a strong inhibitory effect on the production of lactic acid due to the formation of aromatics, esters, and complex nitrogenous heterocyclic compounds, which covered or poisoned the Lewis acid sites of the catalyst. The protein component acted as a chemical buffer that enhanced the production of lactic acid by controlling the release of monosaccharides from the carbohydrate fraction of microalgae and maintaining the catalytic activity of the catalyst. Thus, microalgae residue demonstrated great promise for the production of value-added chemicals.
在 Fe-Sn-Beta 催化剂作用下，温和的反应条件（210°C，2h）下，微藻残渣高效转化为乳酸，产率高达 33.9%。在均相 HO 和催化剂上独特的Lewis 酸位作用下，微藻残渣转化为乳酸经历了三个主要反应步骤：水解、异构化和反醛缩合。结果表明，由于形成芳烃、酯和复杂的含氮杂环化合物，脂质组分对乳酸的生成具有很强的抑制作用，这些化合物覆盖或毒害了催化剂的 Lewis 酸位。蛋白质组分作为一种化学缓冲剂，通过控制碳水化合物部分中单糖的释放和保持催化剂的催化活性，促进了乳酸的生成。因此，微藻残渣在生产高附加值化学品方面具有广阔的前景。
