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Exergy Analysis of Steam Methane Reforming

Abie, Amlaku (2007) Exergy Analysis of Steam Methane Reforming. Masters thesis, Universiti Teknologi PETRONAS.

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Abstract

Steam methane reforming is an energy intensive process. Minimizing energy usage can reduce operating cost and emission to the environment. It is learned that energy requirement of the reformer depends on the operation parameters namely temperature, pressure, and steam to methane ratio. In this work it is intended to perform the exergy analysis of the reformer at various operating parameters. The exergy analysis will address both the quantity and quality of energy. Both chemical and physical exergy of the system are considered in the analysis. The composition of the outlet stream is crucial for exergy calculation hence the reformer is modeled as an equilibrium conversion reactor. The model can predict the composition of the outlet stream. The model can also explain the effect of hydrogen removal in improving the conversion of methane at milder conditions. Hydrogen removal of I 0% has similar effect on methane conversion as 15K rise of reformer temperature at the same condition (other parameters remaining constant). Exergy losses of the reformer for different operating condition were investigated. Exergy loss per mole of hydrogen produced has the minimum value at about 111 OK for steam to methane ratio of 3: 1. Both the conventional exergetic efficiency and the recently proposed utilizable coefficient were calculated. Comparisons were made on the basis of their suitability as criteria of thermodynamic performance for the process. It is found that the utilizable coefficient is better criteria for describing thermodynamic performance. Microsoft Excel is used as computing tool.

Item Type: Thesis (Masters)
Academic Subject : Academic Department - Chemical Engineering - Reactor Technology
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Ahmad Suhairi Mohamed Lazim
Date Deposited: 26 Jan 2015 10:50
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/14469

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