Abstract
The aromatization reaction of liquefied petroleum gas has been studied by
using three liquefied petroleum gases as the raw material and LBO-A as the
catalyst. Nine-lump kinetics model networks have been put forward on the basis
of lumped theory and the aromatization reaction mechanism. In the network, the
aromatization reaction species are firstly lumped into C4= , C40,
n-paraffin, i-paraffin, olefins, aromatics, C2-3= , H2 +
C1-30 , and coke. A mathematical method is first introduced to study the
product distribution of the liquefied petroleum gas aromatization reaction. The
results from experimental data are in accordance with the quantitative
analytical conclusions drawn from the calculated data.
Introduction
In 1994, 1.27 hundred million tons of petroleum were processed, more than
2.2 million tons of ethylene were produced, and the resources of liquefied
petroleum gas (C4 fraction and C5 fraction) reached approximately 3.7 million
tons in China(1,2). The resources of liquefied petroleum gas have become more
and more abundant in China; the output of liquefied petroleum gas is more than
300 thousand tons per year(3,4). The resources of liquefied petroleum gas are
mainly from three resources in China: oil and gas fields, refineries and from
gas cracking(5).
The resources of liquefied petroleum gas are not completely used to create
higher value products, whereas most resources are burned as fuel(6). Recently,
research work has focused mainly on how to use liquefied petroleum gas
effectively(7,8). The various quantitatively analytical methods have been
studied, but the lumped-kinetics models are seldom done.
In this paper, nine-lumped kinetics models, which can predict aromatization
reaction product distribution under various operating conditions and calculate
the maximum deviations of the product yield between calculated results and
practical values, are established for a confined fluidized bed reactor.
© 2009. Society of Petroleum Engineers
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History
- Original manuscript received:
9 June 2008
- Revised manuscript received:
7 May 2009
- Manuscript approved:
7 May 2009
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