A PHASE-SEPARATION KINETIC-MODEL FOR COKE FORMATION

被引：286

作者：

WIEHE, IA

机构：

[1] Corporate Research Laboratories, Exxon Research and Engineering Company, New Jersey 08801-0998, Route 22 East, Annandale

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1993年 / 32卷 / 11期

关键词：

D O I：

10.1021/ie00023a001

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Coke formation during the thermolysis of petroleum residua is postulated to occur by a mechanism that involves the liquid-liquid phase separation of reacted asphaltenes to form a phase that is lean in abstractable hydrogen. This mechanism provides the basis of a model that quantitatively describes the kinetics for the thermolysis of Cold Lake vacuum residuum and its deasphalted oil in an open-tube reactor at 400-degrees-C. The previously unreacted asphaltenes were found to be the fraction with the highest rate of thermal reaction but with the least extent of reaction. This not only described the appearance and disappearance of asphaltenes but also quantitatively described the variation in molecular weight and hydrogen content of the asphaltenes with reaction time. Further evidence of the liquid-liquid phase separation was the observation of spherical particles of liquid crystalline coke and the preferential conversion of the most associated asphaltenes to coke.

引用

页码：2447 / 2454

页数：8

共 26 条

[1]

Brooks JD., 1965, CARBON N Y, V3, P2, DOI [10.1016/0008-6223(65)90047-3, DOI 10.1016/0008-6223(65)90047-3]

[2] MACROSTRUCTURES OF ASPHALTIC FRACTIONS BY VARIOUS INSTRUMENTAL METHODS [J].

DICKIE, JP ;

YEN, TF .

ANALYTICAL CHEMISTRY, 1967, 39 (14) :1847-&

[3] CHARACTERIZATION OF HEAVY RESIDUUM BY A SMALL-ANGLE X-RAY-SCATTERING TECHNIQUE [J].

KIM, HG ;

LONG, RB .

INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS, 1979, 18 (01) :60-63

[4] THERMAL HYDROGENATION OF CRUDE RESIDUA [J].

LANGER, AW ;

STEWART, J ;

THOMPSON, CE ;

WHITE, HT ;

HILL, RM .

INDUSTRIAL AND ENGINEERING CHEMISTRY, 1961, 53 (01) :27-30

[5]

Levinter M.E., 1967, KHIM TEKHOL TOPL MAS, P20

[6]

Levinter M. E., 1966, KHIM TEKH TOPL MASEL, P31

[7]

Magaril R.Z., 1970, KHIM TEKH TOPL MASEL, P22

[8]

MAGARIL RZ, 1971, INT CHEM ENG, V11, P250

[9]

MAGARIL RZ, 1968, INT CHEM ENG, V8, P727

[10] INVESTIGATION OF ASPHALTENE MOLECULAR-WEIGHTS [J].

MOSCHOPEDIS, SE ;

FRYER, JF ;

SPEIGHT, JG .

FUEL, 1976, 55 (03) :227-232

← 1 2 3 →