Global kinetics of the alkaline oxidative degradations of lactose

Q4 Chemical Engineering 分子催化 Pub Date : 1994-10-27 DOI:10.1016/0304-5102(94)00122-7

H.E.J. Hendriks , B.F.M. Kuster, G.B. Marin

引用次数: 5

Abstract

The kinetics of the “classical” and the anthraquinone-2-sulfonate (AMS) catalysed alkaline oxidative degradation of lactose and related carbohydrates have been investigated. Batch experiments were carried out at initial sugar concentrations from 100 to 375 mol m⁻³, AMS concentrations from 0 to 5 mol m⁻³, di-oxygen concentrations from 0.28 to 1.38 mol m⁻³, a pH from 11.5 to 13.5 and temperatures at 293 and 303 K. A reaction network is presented that accounts for the main products formed. Regression analysis of the experimental data, using a multi-response Marquardt algorithm, allowed the experimental data to be described adequately by a reaction sequence consisting of different oxidation pathways starting from the sugar enediolates and having the formation of the latter as the common, most important, rate-determining step.

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乳糖碱性氧化降解的整体动力学

研究了“经典”和蒽醌-2-磺酸盐(AMS)催化乳糖及相关碳水化合物的碱性氧化降解动力学。批量实验在初始糖浓度为100 ~ 375 mol m−3,AMS浓度为0 ~ 5 mol m−3，二氧浓度为0.28 ~ 1.38 mol m−3,pH为11.5 ~ 13.5，温度为293和303 K的条件下进行。提出了一个反应网络，该网络可以解释生成的主要产物。使用多响应Marquardt算法对实验数据进行回归分析，使实验数据能够被一个由不同氧化途径组成的反应序列充分描述，从糖烯二酸酯开始，后者的形成是常见的，最重要的，决定速率的步骤。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

分子催化 Chemical Engineering-Catalysis

CiteScore

1.50

自引率

0.00%

发文量

2959

期刊介绍： Journal of Molecular Catalysis (China) is a bimonthly journal, founded in 1987. It is a bimonthly journal, founded in 1987, sponsored by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, under the supervision of Chinese Academy of Sciences, and published by Science Publishing House, which is a scholarly journal openly circulated both at home and abroad. The journal mainly reports the latest progress and research results on molecular catalysis. It contains academic papers, research briefs, research reports and progress reviews. The content focuses on coordination catalysis, enzyme catalysis, light-ribbed catalysis, stereochemistry in catalysis, catalytic reaction mechanism and kinetics, the study of catalyst surface states and the application of quantum chemistry in catalysis. We also provide contributions on the activation, deactivation and regeneration of homogeneous catalysts, solidified homogeneous catalysts and solidified enzyme catalysts in industrial catalytic processes, as well as on the optimisation and characterisation of catalysts for new catalytic processes. The main target readers are scientists and postgraduates working in catalysis in research institutes, industrial and mining enterprises, as well as teachers and students of chemistry and chemical engineering departments in colleges and universities. Contributions from related professionals are welcome.

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