利用改性克林沸石超声转化木糖产生的甲酸和乳酸

IF 2.8 4区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Natalia Sobuś, Magdalena Król
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引用次数: 0

摘要

结果使用了未经改性的起始材料(0-母体)、沸石的氢形态(0-氢)以及用盐酸分级后的沸石(0-脱铝)。利用超声技术引入铁、铜和钴离子作为活性中心。催化过程在压力釜中进行,时间为 2 小时,温度为 220 ℃。结论使用木糖进行的催化过程产生了羧酸混合物:乳酸、丙酮酸和甲酸。铁作为活性位点的存在发挥了重要作用,它通过脱水作用将木糖转化为乳酸,同时还存在路易斯和布伦司特活性位点。至于甲酸,在类似主题的出版物中从未有过报道,而起始沸石未经改性就有助于制备甲酸。由于天然材料中含有少量铁,因此碱金属的含量可能与中间产物氧化反应的耦合一起促进了甲酸的制备。© 2024 化学工业学会(SCI)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Formic and lactic acids from the conversion of xylose with the use of modified clinoptilolite by sonication

BACKGROUND

A material of natural origin, clinoptilolite, was modified with selected metals in order to obtain a catalyst for the conversion of xylose – the main component of the hemicellulose fraction present in lignocellulosic biomass – to selected carboxylic acids.

RESULTS

The starting material without modification (0-parent), the hydrogen form (0-hydrogen) of zeolite and zeolite after hierarchization with hydrochloric acid (0-dealuminated) were used. Iron, copper and cobalt ions were introduced as active centers using the sonication technique. The catalytic process was carried out in a pressure autoclave for 2 h at a temperature of 220 °C. Compounds such as formic acid with a yield of 91% (0-parent) and lactic acid with a yield of 66.1% (Fe-hydrogen) were obtained.

Conclusion

The catalytic processes carried out using xylose lead to the obtaining of a mixture of carboxylic acids: lactic acid, pyruvic acid and formic acid. An important role here is played by the presence of iron as an active site, which leads to the transformation of xylose into lactic acid by dehydration, and the presence of Lewis and Brønsted active sites. In the case of formic acid, which has never been reported in publications on a similar topic, the starting zeolite without modification contributed to its preparation. It is possible that the content of alkali metals contributed to its preparation along with the coupling of the oxidation reaction of the intermediate product, because of the presence of small amounts of iron, which are present in the natural material. © 2024 Society of Chemical Industry (SCI).

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来源期刊
CiteScore
7.00
自引率
5.90%
发文量
268
审稿时长
1.7 months
期刊介绍: Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.
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