{"title":"Enhancing gluconic acid selectivity in catalytic oxidation: the synergetic effect of glucose-fructose mixtures and kinetic insights","authors":"","doi":"10.1007/s43153-024-00435-1","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>Gluconic acid is a chemical raw material widely used in the food and chemical industries that can be produced by oxidizing glucose and available sugar-rich substrates such as biomass. The abundance of glucose and fructose in industrial waste from lignocellulose and inverted sugar makes them a promising sustainable feedstock. In this work, the catalytic conversion of a glucose and fructose mixture into gluconic acid in an alkaline medium using Pd (4%)—Pt (1%)—Bi (5%)/C catalysts under flowing air was studied. Previously, the traditional chemical conversion of glucose into gluconic acid produced large amounts of by-products. In this work, we combined glucose and fructose to investigate the latter's influence on conversion. The selectivity to gluconic acid was significantly improved by fructose, indicating a new approach for using biomass and by-products such as glucose and fructose syrup. The first step was to conduct a series of experiments at different temperatures and pH levels. The second step was to experiment with adding fructose under optimal conditions. The gluconic acid was about 90%. The yield was approximately 79% at 55 °C and pH 9.5 using the same method with only glucose. Combining experimental data, we propose a kinetic model with a TOF (turnover frequency) between 1.0 and 5.5.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s43153-024-00435-1","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Gluconic acid is a chemical raw material widely used in the food and chemical industries that can be produced by oxidizing glucose and available sugar-rich substrates such as biomass. The abundance of glucose and fructose in industrial waste from lignocellulose and inverted sugar makes them a promising sustainable feedstock. In this work, the catalytic conversion of a glucose and fructose mixture into gluconic acid in an alkaline medium using Pd (4%)—Pt (1%)—Bi (5%)/C catalysts under flowing air was studied. Previously, the traditional chemical conversion of glucose into gluconic acid produced large amounts of by-products. In this work, we combined glucose and fructose to investigate the latter's influence on conversion. The selectivity to gluconic acid was significantly improved by fructose, indicating a new approach for using biomass and by-products such as glucose and fructose syrup. The first step was to conduct a series of experiments at different temperatures and pH levels. The second step was to experiment with adding fructose under optimal conditions. The gluconic acid was about 90%. The yield was approximately 79% at 55 °C and pH 9.5 using the same method with only glucose. Combining experimental data, we propose a kinetic model with a TOF (turnover frequency) between 1.0 and 5.5.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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