Staklenički plinovi iz proizvodnog procesa dobivanja aluminija i mogućnosti njihova smanjenja

undergraduate thesis

• Title (english): Greenhouses gases from the process of aluminium production and the possibilities of their reduction
• Author: Petra Brajenić
• Mentor: Natalija Dolić (mentor)
• Committee member: Ankica Rađenović (predsjednik povjerenstva)
• Committee member: Natalija Dolić (član povjerenstva)
• Committee member: Tamara Holjevac Grgurić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2019-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

U ovom radu prikazan je pregled emisija stakleničkih plinova koji nastaju proizvodnjom
primarnog aluminija te potencijalne mogućnosti za njihovo smanjenje. Staklenički plinovi
imaju veliki utjecaj na zdravlje ljudi i cjelokupni okoliš te im se iz tog razloga posvećuje velika
pažnja. Uz emisije stakleničkih plinova ugljikovog (IV) oksida (CO2) i perfluorougljika, PFC
(CF4, C2F6) za vrijeme proizvodnje primarnog aluminija nastaju druge onečišćujuće tvari poput
crvenog mulja, prašine te plinova, kao što su fluoridi, sumporovi, dušikovi oksidi i mnogi drugi.
Najveće količine emisija stakleničkih plinova nastaju prilikom elektrolitičke redukcije glinice
što uvelike ovisi o vrsti tehnologije koja se upotrebljava. Tehnologije se dijele s obzirom na
vrstu anode koja se upotrebljava kao i prema načinu na koji se glinica dodaje u ćeliju. Primarna
emisija koja nastaje prilikom elektrolitičke redukcije je CO2, nakon čega slijede emisije PFC.
Emisije CO2 nastaju kao posljedica potrošnje ugljičnih anoda te kao posljedica reakcije između
ugljičnih anoda, glinice i taline kriolita za vrijeme elektrolitičke redukcije. Emisije PFC nastaju
kao posljedica poremećaja u radu elektrolitičke ćelije (tzv. anodni efekt). Prilikom rada
elektrolitičke ćelije u normalnim uvjetima emisije, PFC se emitiraju u nemjerljivim količinama.
Kako bi se količine spomenutih emisija mogle smanjiti upotrebljavaju se neke od mogućnosti
smanjenja stakleničkih plinova, kao i kontrola njihovog ispuštanja.

Abstract (english)

This paper gives an overview of green-house emissions created during the production of
primary aluminium and different possibilities of their reduction. Greenhouses gasses have a
major impact on human health and the environment and therefore deserve great attention. In
addition to the greenhouse gas emissions of carbon (IV) oxide (CO2) and perfluorocarbon ,PFC
(CF4, C2F6), other pollutants such as red mud, dust and gases, such as fluorides, sulfur, nitrogen
oxides and many others, are produced during the production of primary aluminum. During the
process of electrolytic reduction of alumina largest amount of greenhouse gases are released,
which depends on the technology being used. The technologies available can be divided based
on the type of anode used in the process, as well as the method of adding alumina to the reaction
cell. The primary emission during electrolytic reduction is CO2, after which perfluorocarbons
follow. CO2 emissions are a product of carbon anodes consumption and a consequence of
reactions between the anodes, alumina and cryolite melt during the electrolytic reduction. PFC
emissions are a product of disturbances in the operation of electrolytic cell, the so-called anode
effect. During normal workflow amount of perfluorocarbon are released in non-traceable
amounts. In order to reduce the amounts of the aforementioned emissions, some of the
possibilities of reducing greenhouse gases, as well as the control of their discharge, are used.

• Keywords: staklenički plinovi; aluminij; primarna proizvodnja; mogućnosti smanjenja emisija
• Keywords (english): greenhouse gases; aluminium; primary production; emission reduction possibility
• Language: croatian
• URN:NBN: urn:nbn:hr:115:105175
• Study programme: Title: Metallurgy; specializations in: Metallurgical Engineering, Industrial Ecology; Course: Metallurgical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-09-24 07:39:36