Determination of Metastable Zone Width and Nucleation Induction Period of Palm Oil and its Olein/Stearin in Melting Layer Crystallization,Chemical Engineering & Technology

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Determination of Metastable Zone Width and Nucleation Induction Period of Palm Oil and its Olein/Stearin in Melting Layer Crystallization
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-01-07 , DOI: 10.1002/ceat.201900457
Chao Lu ₁ , Xiaoxue Liu ₁ , Yufei Xia ₁ , Qing Li ₁ , Leping Dang ₁ , Xinyi He ₂ , Zhanzhong Wang ₁

Affiliation

Measurement methods of metastable zone width (MZW) and nucleation induction time for melting layer crystallization of palm oil (PO) and its olein/stearin (POL/PST) were established, and the effects of cooling rate (corresponding to various supercoolings) on MZWs and induction time for melting layer crystallization of PO, POL, and PST were determined. The results indicated that the MZW coherently rose with increasing cooling rates with respect to PO and POL, while it declined with higher cooling rates for PST. The induction period results demonstrated that the nucleation induction periods of PO, PST, and POL decreased with increasing supercoolings, and the lag time for nucleation negatively correlated to the melting point of oils at the same supercooling. These data could offer significant instruction in designing and controlling the melting layer crystallization process for palm oil.

中文翻译：

棕榈油及其油脂/硬脂酸在熔融层结晶过程中的亚稳区宽度和成核诱导期的确定

建立了棕榈油（PO）及其油精/硬脂精（POL / PST）的亚稳区宽度（MZW）和成核诱导时间的测量方法，并研究了冷却速率（对应于各种过冷度）的影响测定了PO，POL和PST的熔融层结晶的诱导时间。结果表明，MZW随PO和POL冷却速率的提高而连贯地上升，而PST的冷却速率更高时则下降。诱导期的结果表明，PO，PST和POL的成核诱导期随着过冷度的增加而减小，并且在相同的过冷度下，成核的滞后时间与油的熔点呈负相关。

更新日期：2020-01-07

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