向日葵油中油酸在Amberlyst A21上脱除的动力学、平衡和热力学研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-19 DOI:10.3311/ppch.21743

O. Ilgen, Elif Tümkor

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引用次数: 0

摘要

采用Amberlyst A21对葵花籽油中的油酸进行吸附。研究了接触时间、温度、吸附剂质量比等参数对油酸吸附的影响。采用傅里叶变换红外光谱仪(FTIR)和扫描电镜(SEM)对吸附前后的Amberlyst A21进行了表征。480分钟后吸附达到平衡。温度的升高和吸附剂用量的增加导致吸附油酸的量增加。研究了吸附动力学、等温线和热力学。准一级动力学很好地描述了在所有研究温度下的吸附。研究了平衡态下的Langmuir、Freundlich和Dubinin - Radushkevich等温线和热力学分析。Langmuir等温线和Freundlich等温线的适用性表明，吸附发生在单层和非均质表面。热力学结果表明，吸附是自发的吸热吸附。

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Kinetics, Equilibrium and Thermodynamic Studies on Removal of Oleic Acid from Sunflower Oil onto Amberlyst A21

Amberlyst A21 was used for the oleic acid adsorption from sunflower oil (SFO). The impacts of parameters such as contact time, temperature, and mass ratio of adsorbent on oleic acid adsorption were studied. The characterization of Amberlyst A21 before and after adsorption was performed by using Fourier transform infrared spectrometer (FTIR) and scanning electron microscope (SEM). The adsorption reached equilibrium 480 minutes later. The increase in temperature and the amount of adsorbent caused an increase in the amount of adsorbed oleic acid. The adsorption kinetics, isotherms, and thermodynamics were studied. The pseudo-first order kinetics well described the adsorption for all studied temperatures. The Langmuir, Freundlich, and Dubinin−Radushkevich isotherms and thermodynamic analysis were investigated at equilibrium. The suitability of the Langmuir and Freundlich isotherms indicated that the adsorption takes place under monolayer and heterogeneous surfaces. Thermodynamical results showed that adsorption occurs spontaneously and endothermic.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

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.