search query: @keyword synthesis / total: 8
reference: 2 / 8
« previous | next »
Author:Takalo, Jussi
Title:Raskaiden aromaattisten molekyylien aineominaisuudet
Physical properties of heavy aromatic molecules
Publication type:Master's thesis
Publication year:2013
Pages:vii + 103 + [9]      Language:   fin
Department/School:Kemian laitos
Main subject:Orgaaninen kemia   (Kem-4)
Supervisor:Koskinen, Ari
Instructor:Karvinen, Esko ; Pyhälahti, Antti
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

Reading digital theses in the closed network of the Aalto University Harald Herlin Learning Centre

In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/

You can read theses on the Learning Centre customer computers, which are available on all floors.

Logging on to the customer computers

  • Aalto University staff members log on to the customer computer using the Aalto username and password.
  • Other customers log on using a shared username and password.

Opening a thesis

  • On the desktop of the customer computers, you will find an icon titled:

    Aalto Thesis Database

  • Click on the icon to search for and open the thesis you are looking for from Aaltodoc database. You can find the thesis file by clicking the link on the OEV or OEVS field.

Reading the thesis

  • You can either print the thesis or read it on the customer computer screen.
  • You cannot save the thesis file on a flash drive or email it.
  • You cannot copy text or images from the file.
  • You cannot edit the file.

Printing the thesis

  • You can print the thesis for your personal study or research use.
  • Aalto University students and staff members may print black-and-white prints on the PrintingPoint devices when using the computer with personal Aalto username and password. Color printing is possible using the printer u90203-psc3, which is located near the customer service. Color printing is subject to a charge to Aalto University students and staff members.
  • Other customers can use the printer u90203-psc3. All printing is subject to a charge to non-University members.
Location:P1 Ark Aalto  2073   | Archive
Keywords:asphaltenes
hydrocracking
polyaromatics
synthesis
alkylation
solubility
melting point
asfalteenit
vetykrakkaus
polyaromaatit
synteesi
alkylointi
liukoisuus
sulamispiste
sulamisentalpia
Abstract (eng): Asphaltenes are the heaviest and most aromatic fraction of crude oil.
They are large polyaromatic molecules and contain considerable amount of sulphur and metals.
Depleting oil reservoirs mean that available crude oil must be refined as efficiently as possible.
Refining of crude oils with high asphaltene content to high quality fuels is very challenging.
Asphaltenes must be cracked into smaller molecules and sulphur and metals removed to afford good quality fuels.

The importance of asphaltenes is increasing and therefore great amount of research is dedicated to them.
However, physical properties of asphaltene molecules are not found in literature.
Knowing the properties and behaviour of asphaltenes would help to model their refining process.

The scope of this work was to synthesize model compounds, which represent asphaltenes, and to measure physical properties for those compounds.
The modern understanding of asphaltene molecular structure was used as a basis for synthesis.
Methods to measure physical properties were searched and applied.

Seven model compounds were synthesized successfully.
Melting point, enthalpy of fusion, heat capacity, solubilities, vapour pressure and enthalpy of vaporization were measured.
The results will be used for modelling hydrocracking reactions for asphaltenes.
Abstract (fin): Asfalteenit ovat raakaöljyn raskain ja aromaattisin jae.
Ne ovat suuria polyaromaattisia molekyyleja, jotka sisältävät paljon rikkiä ja metalleja.
Öljyvarojen ehtyessä käytettävissä oleva raakaöljy täytyy pystyä jalostamaan entistä paremmalla hyötysuhteella polttoaineiksi.
Paljon asfalteeneja sisältävien raakaöljyjen jalostaminen laadukkaiksi polttoaineiksi on hyvin haastavaa.
Asfalteeneja täytyy hajottaa esim. vetykrakkauksella ja niiden sisältämät rikki ja metallit poistaa.

Johtuen asfalteenien merkityksen kasvamisesta öljyteollisuudessa, on niiden tutkimus lisääntynyt.
Runsaasta tutkimuksesta huolimatta asfalteenimolekyylien aineominaisuuksia ei ole saatavilla kirjallisuudesta.
Niiden aineominaisuuksien tunteminen auttaisi niiden käyttäytymisen ennustamisessa ja jalostusprosessien mallintamisessa.

Työssä syntetisoitiin mallimolekyyleja asfalteeneille.
Syntetisoidut molekyylit vastasivat rakenteeltaan nykyistä käsitystä asfalteeneista.
Kiinnostavia aineominaisuuksia olivat faasitasapainot ja termodynaamiset suureet.
Halutuille aineominaisuuksille etsittiin sopivat mittausmenetelmät kirjallisuudesta.

Mallimolekyyleja onnistuttiin syntetisoimaan seitsemän kappaletta.
Niille mitattiin sulamispisteet, sulamisentalpiat, ominaislämpökapasiteetit, liukoisuudet, höyrynpaineet ja höyrystymisentalpiat.
Mitattuja aineominaisuuksia käytetään asfalteenien vetykrakkauksen mallintamiseen.
ED:2013-08-07
INSSI record number: 47029
+ add basket
« previous | next »
INSSI