用于甘油分解-酯化棕榈硬脂-油脂混合物的高剪切反应器:反应动力学和物理性质

IF 1.9 4区 农林科学 Q3 CHEMISTRY, APPLIED
Inasanti Pandan Wangi,  Supriyanto, Hary Sulistyo, Chusnul Hidayat
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引用次数: 0

摘要

在高剪切反应器(HSR)中使用偏硅酸钠作为催化剂,通过化学甘油分解-酯化反应合成了含有高单酰甘油(MAG)和双酰甘油(DAG)的结构脂质(SLs-MDAG)。本研究旨在探讨温度对高剪切反应器中相对较低温度下甘油分解-酯化动力学以及产品物理性质的影响。在不同温度(80-120°C)和 2000 rpm 的搅拌速率下,使用不相溶的高粘度反应物进行了 5 小时的反应。结果表明,随着温度的升高,反应速率常数呈指数增长。与较低的反应温度(80 和 90°C)相比,110 和 120°C 下的三酰甘油 (TAG) 转化率高出 2.5 倍。当反应温度从 80°C 升至 120°C 时,MAG 和 DAG 分别增加了约 18.3% 和 13.4%。产品的熔点、硬度和颜色也随着温度的升高而改善。总之,使用 HSR 可以在相对较低的温度(110°C)下生产 SLs-MDAG。甘油分解-酯化动力学显示出指数关系,尽管它并不完全符合阿伦尼乌斯模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High shear reactor for glycerolysis—Interesterification palm stearin-olein blend: Reaction kinetics and physical properties

Structured lipids containing high monoacylglycerol (MAG) and diacylglycerol (DAG) (SLs-MDAG) were synthesized by chemical glycerolysis-interesterification using sodium metasilicate as the catalyst in High Shear Reactor (HSR). The objective of this research was to investigate the effect of temperature on the glycerolysis-interesterification kinetics at relatively low temperatures in an HSR and the physical product properties. The reaction was performed using immiscible and highly viscous reactants at various temperatures (80–120°C) and a mixing rate of 2000 rpm for 5 h. Results showed that the reaction rate constant exponentially increased as temperature increased. Triacylglycerol (TAG) conversion was 2.5 fold greater at 110 and 120°C compared to lower reaction temperatures (80 and 90°C). MAG and DAG increased by about 18.3% and 13.4%, respectively, as the reaction temperature increased from 80 to 120°C. The product's melting point, hardness, and color were also improved by increasing temperature. In summary, SLs-MDAG could be produced at a relatively low temperature (110°C) using HSR. The glycerolysis-interesterification kinetic displayed an exponential relationship, even though it did not precisely fit the Arrhenius model.

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来源期刊
CiteScore
4.10
自引率
5.00%
发文量
95
审稿时长
2.4 months
期刊介绍: The Journal of the American Oil Chemists’ Society (JAOCS) is an international peer-reviewed journal that publishes significant original scientific research and technological advances on fats, oils, oilseed proteins, and related materials through original research articles, invited reviews, short communications, and letters to the editor. We seek to publish reports that will significantly advance scientific understanding through hypothesis driven research, innovations, and important new information pertaining to analysis, properties, processing, products, and applications of these food and industrial resources. Breakthroughs in food science and technology, biotechnology (including genomics, biomechanisms, biocatalysis and bioprocessing), and industrial products and applications are particularly appropriate. JAOCS also considers reports on the lipid composition of new, unique, and traditional sources of lipids that definitively address a research hypothesis and advances scientific understanding. However, the genus and species of the source must be verified by appropriate means of classification. In addition, the GPS location of the harvested materials and seed or vegetative samples should be deposited in an accredited germplasm repository. Compositional data suitable for Original Research Articles must embody replicated estimate of tissue constituents, such as oil, protein, carbohydrate, fatty acid, phospholipid, tocopherol, sterol, and carotenoid compositions. Other components unique to the specific plant or animal source may be reported. Furthermore, lipid composition papers should incorporate elements of year­to­year, environmental, and/ or cultivar variations through use of appropriate statistical analyses.
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