Hydrogen production using a thermochemical cycle

Jurij Avsec (Author), Urška Novosel (Author), Dušan Strušnik (Author)

Abstract

Sustainable methods of clean fuel production are needed throughout the world due to depleting oil reserves and the need to reduce carbon dioxide emissions. The technology based on fuel cells for electricity production or the transport sector has already been developed. However, a key missing element is a large-scale method of hydrogen production. The copper-chlorine (CuCI) combined thermochemical cycle is a promising thermochemical cycle that can produce large amounts of cheap hydrogen. A particularly promising part of this process is its use in combination with nuclear or thermal power plants. This paper focuses on a CuCl cycle and describes the models used to calculate thermodynamic and transport properties. This paper discusses the mathematical model for computing the thermodynamic properties for pure HCl and CuCl2. The mathematical model developed for the solid phase takes into account vibrations of atoms in molecules and intermolecular forces. This mathematical model can be used for the calculation of the thermodynamic properties of polyatomic crystals on the basis of the Einstein and Debye equations. The authors of this paper developed the model in the low temperature and high temperature region. All the analytical data have been compared with some experimental results and show a relatively good match. For the solid phase, the authors developed a model to calculate thermal conductivity based on electron and phonon contributions.

Keywords

thermodynamics;energy;hydrogen production;solid phase;fluid phase;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UM FE - Faculty of Energetics
Publisher:	Fakulteta za energetiko Univerze v Mariboru
UDC:	536.7
COBISS:	126767363
ISSN:	1855-5748
Views:	8
Downloads:	0
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Other data

Secondary language:	Slovenian
Secondary title:	Proizvodnja vodika s termokemičnim procesom
Secondary abstract:	Zaradi izčrpavanja zalog nafte in potrebe po zmanjšanju emisij ogljikovega dioksida so trajnostne metode proizvodnje čistega goriva potrebne v vseh državah sveta. Tehnologija na osnovi gorivnih celic je že razvita, vendar pa je ključni manjkajoči element obsežna proizvodnja vodika. Kombinirani termokemični cikel baker-klor (CuCl) predstavlja obetaven termokemični cikel za proizvodnjo poceni vodika v velikih količinah, kar je proces, ki je še posebej zanimiv v kombinaciji z jedrskimi elektrarnami ali termoelektrarnami. Ta članek se osredotoča na cikel baker-klor (CuCl) in opisuje modele, kako izračunati termodinamične in transportne lastnosti, pri čemer obravnava matematični model za izračun termodinamičnih lastnosti za čisti HCl in CuCl2. Razvit matematični model za trdno fazo upošteva vibracije atomov v molekulah in medmolekulske sile. Ta matematični model, ki se lahko uporablja za izračun termodinamičnih lastnosti poliatomskih kristalov na podlagi Einsteinovih in Debyejevih enačb, smo razvili v nizkotemperaturnem in visokotemperaturnem območju. Analitične podatke smo primerjali z nekaterimi eksperimentalnimi rezultati in kažejo dobro ujemanje. Za trdno fazo smo razvili model za izračun toplotne prevodnosti na podlagi prispevkov elektronov in fononov.
Secondary keywords:	termodinamika;energija;proizvodnja vodika;trdna faza;tekoča faza;
Type (COBISS):	Scientific work
Pages:	str. 11-20
Volume:	ǂVol. ǂ15
Issue:	ǂiss. ǂ2
Chronology:	sep. 2022
ID:	20605130