Neposredno zajemanje ogljikovega dioksida iz ozračja

diplomsko delo

Andrej Žerjal (Author), Igor Plazl (Mentor)

Abstract

Globalno segrevanje je posledica višanja koncentracije ogljikovega dioksida v atmosferi. Današnja družba je zaradi tega primorana drastično znižati izpuste ogljikovega dioksida v ozračje, ker to ne bo zelo verjetno zadostovalo, bodo tudi negativne emisijske tehnologije (NET) imele pomembno vlogo pri omejitvi višanja temperature. Neposredno zajemanje ogljikovega dioksida iz ozrečja (DAC) je NET tehnologija, ki neposredno zajema ogljikov dioksid iz ozračja. DAC sistemi temelijo na procesih absorpcije, oziroma adsorpcije in desorpcije. Ogljikov dioksid se kemijsko ali fizikalno (odvisno od uporabljene tehnologije) veže na absorbent, oziroma adsorbent. Nato sledi regeneracija absorbenta/adsorbenta, ki jo dosežemo z dovajanjem energije in sprostitev skoraj popolnoma čistega ogljikovega dioksida. Plin, ki ga tako dobimo, ga lahko uporabimo za proizvajanje sinteznih goriv, za sintezo novih kemikalij, za gaziranje pijač, za pridobivanje nafte ali zemeljskega plina itd. Druge možnosti odstranjevanja ogljikovega dioksida iz ozračja so tudi npr. shranjevanje ogljikovega dioksida v kamninah. DAC je mlada tehnologija in je zaradi tega še na začetku svojega razvoja. Glavni problem predstavljajo visoki obratovalni stroški, ki so skoraj v celoti odvisni od velike količine potrebne energije za regeneracijo absorbeta/adsorbenta. Ravno zaradi visokih stroškov je bodočnost DAC tehnologije še negotova. Kljub temu v naslednjih desetletjih lahko pričakujemo pomembnejše tehnične izboljšave.

Keywords

ogljikov dioksid;DAC sistemi;adsorpcija;absorpcija;NET tehnologija;diplomska dela;

Data

Language:	Slovenian
Year of publishing:	2020
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher:	[A. Žerjal]
UDC:	66.02(043.2)
COBISS:	30598403
Views:	522
Downloads:	84
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Direct carbon dioxide capture from the atmosphere
Secondary abstract:	Global warming is caused by the increasing concentration of carbon dioxide in the atmosphere. Our society is therefore forced to drastically reduce carbon dioxide emissions. As this is unlikely to be sufficient, also negative emission technologies (NET) will play an important role in limiting the temperature rise. Direct air capture (DAC) is a NET technology that directly captures carbon dioxide from the atmosphere. DAC systems are based on the processes of absorption or adsorption, followed by its desorption. Carbon dioxide is chemically or physically (depending on the used technology) bound to the sorbent. This is followed by the regeneration of the sorbent, which is achieved by supplying energy and releasing almost completely pure carbon dioxide. The gas obtained in this way can be used as for example in the production of synthetic fuels, sparkling drinks, in the synthesis processes of various chemicals and in the extraction of oil or natural gas. Another options to remove carbon dioxide from air is its the storage of carbon dioxide in rocks. DAC is a young technology and is therefore still at the beginning of its development. The main problem are the high operational costs mainly due to the large amount of energy required to regenerate the sorbent. This is the main reason, why the future of DAC technologies is still uncertain. Nevertheless, significant technical improvements can be expected in the coming decades.
Secondary keywords:	carbon dioxide;DAC systems;NET technologies;
Type (COBISS):	Bachelor thesis/paper
Study programme:	1000372
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemijsko inženirstvo
Pages:	29 str.
ID:	12031344