magistrsko delo
Rok Gomilšek (Author), Lidija Čuček (Mentor), Zorka Novak-Pintarič (Co-mentor), Marko Homšak (Co-mentor)

Abstract

Količina emisij toplogrednih plinov se je od začetka industrijske revolucije do danes znatno povečala. Koncentracija najpomembnejšega antropogenega toplogrednega plina ogljikovega dioksida (CO2) se je povečala za več kot 40 %. Zajemanje ogljikovega dioksida je učinkovita metoda za separacijo ogljikovega dioksida od preostalih dimnih plinov in najobetavnejša metoda za zmanjšanje emisij v bližnji prihodnosti. Glavni vir emisij CO2 pri proizvodnji aluminija je zgorevanje anod v Hall-Héroultovem procesu. CO2 se tvori tudi pri Boudouardovi reakciji, kjer CO2 reagira z ogljikovo anodo, pri čemer se tvori ogljikov monoksid, ki kasneje oksidira v CO2. Cilj magistrske naloge je bil razviti model odprte zanke za zajemanje ogljikovega dioksida iz procesa proizvodnje aluminija. Za simulacijo procesa smo uporabili program Aspen Plus. Monoetanolamin smo izbrali kot absorpcijski medij. Raziskovali smo vpliv temperature dimnih plinov, pretoka dimnih plinov in začetne koncentracije CO2 v dimnih plinih na obratovanje in ekonomiko procesa. Rezultati kažejo, da stroški procesa zajemanja CO2 naraščajo s povišanjem temperature in padajo s povečanjem pretoka, medtem ko stroški pri spremembi začetne koncentracije CO2 v dimnih plinih sprva padajo, nato pa naraščajo. Najboljše tehnološko-ekonomske rešitve za naš proces smo dobili pri temperaturi 75 °C, pretoku 205 kg/s in začetni koncentraciji CO2 4 %.

Keywords

zajem ogljikovega dioksida;proizvodnja aluminija;emisijski kuponi;program Aspen Plus;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [R. Gomilšek]
UDC: 66.074.33:66.012(043.2)
COBISS: 21027862 Link will open in a new window
Views: 1335
Downloads: 280
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Other data

Secondary language: English
Secondary title: Carbon dioxide capture from the aluminium production process
Secondary abstract: The level of greenhouse gas emissions has increased significantly since the beginning of industrial revolution. Carbon dioxide (CO2) is considered as the main anthropogenic greenhouse gas. Concentration of CO2 has risen for more than 40 %. Carbon capture is effective method for separation of CO2 from the flue gases and is the most promising technology for reducing CO2 emissions in the near future. Most of the CO2 emissions from aluminium industry come from the consumption of carbon anodes in the Hall-Héroult process. CO2 is also formed as the result of the Boudouard reaction, where CO2 reacts with the carbon anode forming carbon monoxide, which is then oxidized to CO2. The aim of this study was to develop an open loop model for a carbon capture from flue gases from the aluminium production process using software package Aspen Plus. Monoethanolamine was used as the absorption medium in the carbon capture plant. The influence of the flue gas temperature, the flue gas flowrate and the initial CO2 concentration in flue gases on the performance and economics of the process was investigated in this work. The results show that the cost of the capture process is rising with the increase of temperature and decreases with increasing flowrates, while the cost by changing initial CO2 concentration in flue gases initially decreases and then rises. The best techno-economic solutions for our process are obtained at temperature 75 °C, the flowrate of 205 kg/s and initial concentration of CO2 4 %.
Secondary keywords: carbon dioxide capture;production of aluminium;emission ellowances;Aspen Plus;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: XIII, 72 str.
ID: 10864670