Existence of a critical carbon number in the aging of a wax-oil gel

被引：104

作者：

Singh, P ^{[1
]}

Youyen, A ^{[1
]}

Fogler, HS ^{[1
]}

机构：

[1] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

来源：

AICHE JOURNAL | 2001年 / 47卷 / 09期

关键词：

D O I：

10.1002/aic.690470921

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A fundamental study, was carried out to understand the aging (or hardening) of the wax-oil gels formed in the subsea pipelines during the flow of crude oil from offshore wells to shore. The aging process is a counterdiffusion phenomenon where there exists a critical carbon number (CCN), and wax molecules with carbon numbers greater than the CCN diffuse into the gel matrices and vice versa. Using a careful analysis of carbon number distributions of gel deposits, collected from a cold finger after various deposition time intervals, the CCN for the wax-oil system was obtained. A mathematical model, based on a modified version of UNIQUAC model, was developed to predict the CCN for wax-oil systems. The size of the interaction units for n-alkanes in the solid-phase UNIQUAC model was found to be a strong function of the mean carbon number in the solid phase.

引用

页码：2111 / 2124

页数：14

共 28 条

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