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Author(s): P. Kannan, A. Al Shoaibi & C. Srinivasakannan
Abstract:
This paper presents a simplified process simulation model of typical waste
polyethylene gasification in a fluidized bed reactor using Aspen Plus.
The
proposed model incorporates both physical and chemical processes, including
drying, pyrolysis, combustion and gasification, by using various inbuilt modules
to predict the resulting product gas composition and temperature.
A detailed
sensitivity analysis investigating the effects of various process parameters,
including equivalence ratio, bed height, and steam/fuel ratio has been presented.
Keywords:
gasification, waste LDPE, aspen plus, modelling and simulation.
1 Introduction:
Gasification in commercial scale is practiced based on batch, semi batch and
continuous modes of operation depending upon the processing capacity of the
plant.
Typically a plant processing large throughput utilize fluidized beds due to
the advantages such as enhanced gas-solid contact, excellent mixing
characteristics [1], operating flexibility [2], and ease of solids handling [3] that
lead to a better overall gasification efficiency.
Although there are many different
types of fluidized beds available for gasification and combustion, bubbling
fluidized type is the most preferred type whenever steam is used as a gasifying
medium [4].
In general the process of gasification for energy extraction from solid carbon
source involve three simultaneous or competing reactions namely combustion,
pyrolysis and gasification.
The partial combustion of solid fuel creates an oxygen
devoid, high temperature condition within the reactor which promotes the
...
Pages: 10
Size: 725 kb
Paper DOI: 10.2495/WM120171
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