Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils

Fouling on the surfaces of heat exchangers, particularly in crude pre-heat train is one of the major challenges faced in crude oil refining. The accumulation of unwanted deposits on the surfaces of heat exchangers is referred to as foulant which causes obstacle to the heat transfer mechanism resulti...

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Main Author: AHMAD, MOHD ZAMIDI
Format: Thesis
Language:English
Published: 2011
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Online Access:http://utpedia.utp.edu.my/id/eprint/2821/1/2010%20-CHEMICAL-CHARACTERISTICS%20AND%20FOULING%20TENDENCIES%20OF%20MALAYSIAN%20CRUDE%20OILS-MOHD%20ZAMIDI%20AHMAD.pdf
http://utpedia.utp.edu.my/id/eprint/2821/
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spelling oai:utpedia.utp.edu.my:28212024-07-23T04:42:15Z http://utpedia.utp.edu.my/id/eprint/2821/ Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils AHMAD, MOHD ZAMIDI TP Chemical technology Fouling on the surfaces of heat exchangers, particularly in crude pre-heat train is one of the major challenges faced in crude oil refining. The accumulation of unwanted deposits on the surfaces of heat exchangers is referred to as foulant which causes obstacle to the heat transfer mechanism resulting in lost efficiency. Virgin foulant deposits collected from a local refinery were characterized for its physical and chemical properties using various sophisticated equipment to understand the properties and deposition mechanisms. From this studied it was found that wax formation was the major foulant material. The wax deposition follows two different mechanism routes and reactions i.e. in tube side a slow and steady deposition aided by polymerization reaction, while in the shell side a rapid sedimentation due to film boiling is observed. Based on the fouling tendency its compositions and properties, selected properties of a crude oil associated to it were identified. Three Malaysian crude oils tagged as A, B and C was selected. Each of chosen crude were characterized individually and later blended in accordance to common practice in a local refinery. Asphaltene compatibility parameter was done for fouling tendencies. From the study it was found that all 3 crudes at the predefined blending ratio are compatibility. Further test to understand asphaltene precipitation behavior was also conducted using Design of Experiment (DOE), Taguchi Orthogonal Array L-16 under the influence of temperature, solvent type and resident time. It was found that temperature has the highest impact and that asphaltene deposition; it decreases with increase in temperature. Asphaltene precipitation was also concluded to be significantly influenced by the presence of low molecular hydrocarbon. 2011-08 Thesis NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/id/eprint/2821/1/2010%20-CHEMICAL-CHARACTERISTICS%20AND%20FOULING%20TENDENCIES%20OF%20MALAYSIAN%20CRUDE%20OILS-MOHD%20ZAMIDI%20AHMAD.pdf AHMAD, MOHD ZAMIDI (2011) Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils. Masters thesis, UTP.
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Electronic and Digitized Intellectual Asset
url_provider http://utpedia.utp.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
AHMAD, MOHD ZAMIDI
Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils
description Fouling on the surfaces of heat exchangers, particularly in crude pre-heat train is one of the major challenges faced in crude oil refining. The accumulation of unwanted deposits on the surfaces of heat exchangers is referred to as foulant which causes obstacle to the heat transfer mechanism resulting in lost efficiency. Virgin foulant deposits collected from a local refinery were characterized for its physical and chemical properties using various sophisticated equipment to understand the properties and deposition mechanisms. From this studied it was found that wax formation was the major foulant material. The wax deposition follows two different mechanism routes and reactions i.e. in tube side a slow and steady deposition aided by polymerization reaction, while in the shell side a rapid sedimentation due to film boiling is observed. Based on the fouling tendency its compositions and properties, selected properties of a crude oil associated to it were identified. Three Malaysian crude oils tagged as A, B and C was selected. Each of chosen crude were characterized individually and later blended in accordance to common practice in a local refinery. Asphaltene compatibility parameter was done for fouling tendencies. From the study it was found that all 3 crudes at the predefined blending ratio are compatibility. Further test to understand asphaltene precipitation behavior was also conducted using Design of Experiment (DOE), Taguchi Orthogonal Array L-16 under the influence of temperature, solvent type and resident time. It was found that temperature has the highest impact and that asphaltene deposition; it decreases with increase in temperature. Asphaltene precipitation was also concluded to be significantly influenced by the presence of low molecular hydrocarbon.
format Thesis
author AHMAD, MOHD ZAMIDI
author_facet AHMAD, MOHD ZAMIDI
author_sort AHMAD, MOHD ZAMIDI
title Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils
title_short Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils
title_full Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils
title_fullStr Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils
title_full_unstemmed Characteristics and Fouling Tendencies of Selected Malaysian Crude Oils
title_sort characteristics and fouling tendencies of selected malaysian crude oils
publishDate 2011
url http://utpedia.utp.edu.my/id/eprint/2821/1/2010%20-CHEMICAL-CHARACTERISTICS%20AND%20FOULING%20TENDENCIES%20OF%20MALAYSIAN%20CRUDE%20OILS-MOHD%20ZAMIDI%20AHMAD.pdf
http://utpedia.utp.edu.my/id/eprint/2821/
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score 13.222552