Klemen Rola

1. ROLA, Klemen. Proizvodnja bioetanola iz lignocelulozne biomase : diplomsko delo univerzitetnega študijskega programa I. stopnje. Maribor: [K. Rola], 2021. IX, 50 str., ilustr. Digital Library of the University of Maribor – DLUM. [COBISS.SI-ID 77664515]

2. ROLA, Klemen, GIMPELJ, Jan, GRUBER, Sven, DROFENIK, Jan, NOVAK-PINTARIČ, Zorka. Preliminary study on the possibilities of centralized treatment of waste sludge in Slovenia. In: POTRČ, Sanja (ed.), et al. 5th International Conference on Technologies & Business Models for Circular Economy : book of abstracts : [September 12th to September 14th 2022, Portorož, Slovenia]. 1st ed. Maribor: University of Maribor, University Press, 2022. Str. 25-27. ISBN 978-961-286-646-4. https://dk.um.si/Dokument.php?id=162201&lang=slv. [COBISS.SI-ID 121817347]

3. GRUBER, Sven, ROLA, Klemen, URBANCL, Danijela, GORIČANEC, Darko. Carbon-free heat production for high-temperature heating systems. Sustainability. Okt. 2023, vol. 15, iss. 20, [art. no.] 15063, 18 str., ilustr. ISSN 2071-1050. Digital Library of the University of Maribor – DLUM, DOI: 10.3390/su152015063. [COBISS.SI-ID 169267203]
project: This study was funded by research program P2-0046 and research project V2-2271.

4. ROLA, Klemen. Izraba obnovljivih virov energije za proizvodnjo sintetičnega metana : magistrsko delo. Maribor: R. Klemen], 2023. 1 spletni vir (1 datoteka PDF (XVIII, 143 f.)), ilustr. Digital Library of the University of Maribor – DLUM. [COBISS.SI-ID 167450371]

5. NEMET, Andreja, BOGATAJ, Miloš, HVALEC, David, KRAVANJA, Zdravko, URBANCL, Danijela, GORIČANEC, Darko, KROG, Franco, AVSEC, Jurij, ROLA, Klemen, GRUBER, Sven, GORIČAN, Ana, CETIN, Nikolina. Ocena potenciala medsektorske integracije v Sloveniji s poudarkom vključevanja prometnega sektorja : (V2-2271), rezultat 1.1. Maribor: Univerza v Mariboru, 2023. 38 f., ilustr., graf. prikazi. [COBISS.SI-ID 151539203]

6. ROLA, Klemen, GRUBER, Sven, URBANCL, Danijela, GORIČANEC, Darko. Utilisation of renewable electricity to produce synthetic methane. Energies. Sep. 2023, vol. 16, iss. 19, [article no.] 6871, 25 str. ISSN 1996-1073. Digital Library of the University of Maribor – DLUM, DOI: 10.3390/en16196871. [COBISS.SI-ID 166692611]

7. URBANCL, Danijela, GAJŠT, Lana, GORIČANEC, Darko, GRUBER, Sven, ROLA, Klemen, PETROVIČ, Aleksandra. Assessment of the energy potential of flax and hemp by-products. In: RADOJČIĆ REDOVNIKOVIĆ, Ivana (ed.). Natural resources green technology and sustainable development 5 : 3rd - 5th December 2024, Zagreb, Croatia : proceedings. Zagreb: Faculty of Food Technology and Biotechnology,, [2024]. Str. [98-103], ilustr. [COBISS.SI-ID 219982339]

8. GRUBER, Sven, ROLA, Klemen, GORIČANEC, Darko, URBANCL, Danijela. Fully integrated hybrid solid oxide fuel cell–rankine cycle system with carbon capture, utilisation, and storage for sustainable combined heat and power production. Sustainability. May 2024, vol. 16, iss. 11, [article no.] 4389, 29 str. ISSN 2071-1050. Digital Library of the University of Maribor – DLUM, DOI: 10.3390/su16114389. [COBISS.SI-ID 196996099]

9. ROLA, Klemen, GRUBER, Sven, URBANCL, Danijela, GORIČANEC, Darko. Hibridni SOFC sistem za trajnostno sočasno proizvodnjo toplote in elektrike. In: CIGALE, Andreja (ed.), KOZAMERNIK, Barbara (ed.). Vseslovenska energetska konferenca : 16.-17. oktober 2024, Cankarjev dom v Ljubljani : Energetska prihodnost in pot v nizkoogljično družbo : zbornik prispevkov. Ljubljana: Slovensko združenje elektroenergetikov CIGRE - CIRED: Slovensko združenje za energetiko, 2024. Str. 125-126, ilustr. ISBN 978-961-6265-40-9. https://vseslovenska.si/zbornik-2024/. [COBISS.SI-ID 216348419]

10. GRUBER, Sven, ROLA, Klemen, SANKOVIČ, Saša, URBANCL, Danijela, GORIČANEC, Darko. Performance assessment of a compression cycle ejector heat pump. In: JOUHARA, Hussam (ed.), OLABI, Abdul Ghani (ed.). Sustainable energy & environmental protection : proceedings of the 16th International Conference on Sustainable Energy & Environmental Protection : Vienna, Austria, 9th-12th September 2024. [S. l.: s. n.], cop. 2024. Str. 316-321, ilustr. [COBISS.SI-ID 214490371]

11. PETROVIČ, Aleksandra, ROLA, Klemen, GRUBER, Sven, SANKOVIČ, Saša, ŠANTL, Neža, ČUČEK, Lidija, GORIČANEC, Darko, URBANCL, Danijela. The processing of biological waste from the pharmaceutical industry. Chemical engineering transactions. [Online ed.]. 2024, vol. 114, str. 685-690, ilustr. ISSN 2283-9216. DOI: 10.3303/CET24114115. [COBISS.SI-ID 223280643]

12. URBANCL, Danijela, GORIČANEC, Darko, GRUBER, Sven, ROLA, Klemen. Proizvodnja toplote z dvostopenjsko kaskadno visokotemperaturno toplotno črpalko za potrebe daljinskega ogrevanja : idejni projekt. Maribor: Fakulteta za kemijo in kemijsko tehnologijo, 2024. VII, 116 str. [COBISS.SI-ID 217918723]

13. GRUBER, Sven, ROLA, Klemen, URBANCL, Danijela, GORIČANEC, Darko. Recent advances in ejector-enhanced vapor compression heat pump and refrigeration systems : a review. Energies. Aug 2024, vol. 17, iss. 16, [article no.] 4043, 50 str. ISSN 1996-1073. Digital Library of the University of Maribor – DLUM, DOI: 10.3390/en17164043. [COBISS.SI-ID 206165763]

14. GRUBER, Sven, ROLA, Klemen, URBANCL, Danijela, GORIČANEC, Darko. Sistem kompresijske dvostopenjske toplotne črpalke z vgrajenimi turbinami. In: CIGALE, Andreja (ed.), KOZAMERNIK, Barbara (ed.). Vseslovenska energetska konferenca : 16.-17. oktober 2024, Cankarjev dom v Ljubljani : Energetska prihodnost in pot v nizkoogljično družbo : zbornik prispevkov. Ljubljana: Slovensko združenje elektroenergetikov CIGRE - CIRED: Slovensko združenje za energetiko, 2024. Str. 130-131, ilustr. ISBN 978-961-6265-40-9. https://vseslovenska.si/zbornik-2024/. [COBISS.SI-ID 216353539]

15. URBANCL, Danijela, GARMUT, Anteja, GORIČANEC, Darko, GRUBER, Sven, ROLA, Klemen, LEŠNIK, Luka, PETROVIČ, Aleksandra. Solid and liquid product analysis of waste biomass torrefication. In: JOUHARA, Hussam (ed.), OLABI, Abdul Ghani (ed.). Sustainable energy & environmental protection : proceedings of the 16th International Conference on Sustainable Energy & Environmental Protection : Vienna, Austria, 9th-12th September 2024. [S. l.: s. n.], cop. 2024. Str. 310-315, ilustr. [COBISS.SI-ID 214481667]

16. PETROVIČ, Aleksandra, HOCHENAUER, Christoph, ZAZIJAL, Matej, GRUBER, Sven, ROLA, Klemen, ČUČEK, Lidija, GORIČANEC, Darko, URBANCL, Danijela. Torrefaction and hydrothermal carbonization of waste from the paper industry : effects of atmosphere choice and pretreatment with natural acidic reagent on fuel properties. Thermal science and engineering progress. [Online ed.]. 2024, vol. 51, [article no.] 102623, 17 str. ISSN 2451-9049. DOI: 10.1016/j.tsep.2024.102623. [COBISS.SI-ID 194974723]
project: The authors would like to thank the Slovenian Research Agency for financial support (Core funding for research No. P2-0421, P2-0046 and J4-50149). The work was carried out with the help of research equipment procured within the project "Upgrading national research infrastructures - RIUM", cofinanced by the Republic of Slovenia, the Ministry of Education, Science and Sport and the European Union from the European Regional Development Fund. We would also like to thank the Institute of Thermal Engineering at the Faculty of Mechanical Engineering and Economic Sciences, Graz University of Technology for its support in developing and conducting the experiments.

17. ROLA, Klemen, GRUBER, Sven, URBANCL, Danijela, GORIČANEC, Darko. Waste Lignocellulosic Biomass as a Source for Bioethanol Production. Sustainable chemistry. [Online ed.]. Feb. 2024, vol. 5, iss. 1, 12 str., ilustr. ISSN 2673-4079. Digital Library of the University of Maribor – DLUM, DOI: 10.3390/suschem5010001. [COBISS.SI-ID 187697667]

18. ŠKORJANC, Andreja, GRUBER, Sven, ROLA, Klemen, GORIČANEC, Darko, URBANCL, Danijela. Advancing energy recovery: evaluating torrefaction temperature effects on food waste properties from fruit and vegetable processing. Processes. [Online ed.]. Jan. 2025, vol. 13, iss. 1, [article no.] 208, 18 str., ilustr. ISSN 2227-9717. Digital Library of the University of Maribor – DLUM, DOI: 10.3390/pr13010208. [COBISS.SI-ID 223197443]

19. GRUBER, Sven, ROLA, Klemen, URBANCL, Danijela, GORIČANEC, Darko. Heat pipe integrated heat pump system for low-enthalpy geothermal reservoir utilisation. In: JOUHARA, Hussam (ed.), PFEIFER, Christoph (ed.), OLABI, Abdul Ghani (ed.). Sustainable energy & environmental protection : proceedings of the 17th International Conference on Sustainable Energy & Environmental Protection, Brunel University London, 28th – 31st July 2025. [S. l.: s. n., 2025]. Str. 145-151, ilustr. ISBN 978-3-900397-21-0. [COBISS.SI-ID 253863683]

20. ŠKORJANC, Andreja, PRAZNIK PILINGER, Tia, MEDVED, Tinkara, URBANCL, Danijela, GORIČANEC, Darko, GRUBER, Sven, ROLA, Klemen, PETROVIČ, Aleksandra. Hydrothermal carbonization of apple and grape pomace : chemical and energy properties assessment. In: JOUHARA, Hussam (ed.), PFEIFER, Christoph (ed.), OLABI, Abdul Ghani (ed.). Sustainable energy & environmental protection : proceedings of the 17th International Conference on Sustainable Energy & Environmental Protection, Brunel University London, 28th – 31st July 2025. [S. l.: s. n., 2025]. Str. 152-156, ilustr. ISBN 978-3-900397-21-0. [COBISS.SI-ID 253900035]
project: The authors would like to thank the Slovenian Research Agency for financial support (programs P2-0046, P2-0421). The work was carried out with the help of research equipment procured within the project "Upgrading national research infrastructures - RIUM", co-financed by the Republic of Slovenia, the Ministry of Education, Science and Sport and the European Union from the European Regional Development Fund.

21. TRAVNIKAR, Nina, CENČIČ, Tjaša, KERŠIČ, Pia, ROLA, Klemen, HRIBERNIK, Silvo, ČUČEK, Lidija, PETROVIČ, Aleksandra. Hydrothermal treatment of lignocellulosic waste biomass in the presence of deep eutectic solvent (Des). In: 20th Conference on Sustainable Development of Energy, Water and Environment Systems : Dubrovnik, 5-10 October, 2025 : book of abstracts. Zagreb: Faculty of Mechanical Engineering and Naval Architecture, 2025. Str. 385. Digital proceedings, 20. ISSN 2706-3690. [COBISS.SI-ID 275828483]

22. FEKONJA, Nika, SANKOVIČ, Saša, ROLA, Klemen, GRUBER, Sven, SIMONIČ, Marjana, PETROVIČ, Aleksandra, GORIČANEC, Darko, URBANCL, Danijela. Impurities removal from pharmaceutical wastewater by vacuum evaporation. In: JOUHARA, Hussam (ed.), PFEIFER, Christoph (ed.), OLABI, Abdul Ghani (ed.). Sustainable energy & environmental protection : proceedings of the 17th International Conference on Sustainable Energy & Environmental Protection, Brunel University London, 28th – 31st July 2025. [S. l.: s. n., 2025]. Str. 133-138, ilustr. ISBN 978-3-900397-21-0. [COBISS.SI-ID 253819139]
project: The authors would like to thank the Slovenian Research Agency for financial support (project L2-60155 and program P2-0046). The work was carried out with the help of research equipment procured within the project "Upgrading national research infrastructures - RIUM", co-financed by the Republic of Slovenia, the Ministry of Education, Science and Sport and the European Union from the European Regional Development Fund.

23. ROLA, Klemen, GRUBER, Sven, URBANCL, Danijela, GORIČANEC, Darko. Mathematical modelling of solid oxide fuel cells : validation and consideration for CO oxidation. In: BAN, Marko (ed.), GUZOVIĆ, Zvonimir (ed.), KRAJAČIĆ, Goran (ed.). 1st African conference on sustainable development of energy, water and environment systems : Oujda, Morocco, 27-31 May, 2025 : book of abstracts. Zagreb: Faculty of Mechanical Engineering and Naval Architecture, 2025. Str. 98. [COBISS.SI-ID 265867779]

24. NEMET, Andreja, BOGATAJ, Miloš, HVALEC, David, KROG, Franco, ROLA, Klemen, GRUBER, Sven, AVSEC, Jurij, URBANCL, Danijela, GORIČANEC, Darko, KRAVANJA, Zdravko. Ocena potenciala medsektorske integracije v Sloveniji s poudarkom vključevanja prometnega sektorja : (V2-2271) : zaključno poročilo. Maribor: Univerza v Mariboru, 2025. 186 f., ilustr., graf. prikazi. Digital Library of the University of Maribor – DLUM. [COBISS.SI-ID 231291907]

25. KOS, Anej. Proizvodnja sintetičnega metanola iz CO2 in trajnostnega vodika : diplomsko delo. Maribor: [A. Kos], 2025. X, 45 str., graf. prik. https://dk.um.si/IzpisGradiva.php?id=93405. [COBISS.SI-ID 276165379]

26. KOS, Anej. Proizvodnja sintetičnega metanola iz CO2 in trajnostnega vodika : diplomsko delo. Maribor: [A. Kos], 2025. 1 spletni vir (1 datoteka PDF (X, 50 f.)), ilustr. Digital Library of the University of Maribor – DLUM. [COBISS.SI-ID 243802371]

27. SANKOVIČ, Saša, ROLA, Klemen, KNEZ, Aljaž, GRUBER, Sven, URBANCL, Danijela, GORIČANEC, Darko. Spray drying of residual pharmaceutical fermentation brot. In: JOUHARA, Hussam (ed.), PFEIFER, Christoph (ed.), OLABI, Abdul Ghani (ed.). Sustainable energy & environmental protection : proceedings of the 17th International Conference on Sustainable Energy & Environmental Protection, Brunel University London, 28th – 31st July 2025. [S. l.: s. n., 2025]. Str. 139-144, ilustr. ISBN 978-3-900397-21-0. [COBISS.SI-ID 253908739]
project: The authors would like to thank the Slovenian Research Agency for financial support (project L2-60155 and program P2-0046). The work was carried out with the help of research equipment procured within the project "Upgrading national research infrastructures - RIUM", co-financed by the Republic of Slovenia, the Ministry of Education, Science and Sport and the European Union from the European Regional Development Fund. The authors would also like to thank the Faculty of Pharmacy, which enabled the spray drying experiments.

28. PETROVIČ, Aleksandra, VOHL, Sabina, GRUBER, Sven, ROLA, Klemen, CENČIČ, Tjaša, ČUČEK, Lidija, URBANCL, Danijela. Thermogravimetric, kinetic and thermodynamic behaviour of raw and hydrothermally pretreated oil cakes during pyrolysis and TG-FTIR analysis of the gaseous products. Renewable energy. July 2025, vol. 247, [article no.] 123041, 17 str., ilustr. ISSN 1879-0682. Digital Library of the University of Maribor – DLUM, DOI: 10.1016/j.renene.2025.123041. [COBISS.SI-ID 231571459]
project: The authors would like to thank the Slovenian Research and Innovation Agency (ARIS) for supporting this work by funding the research programmes P2-0421, P2-0046 and J4-50149 and IKEMA d.o.o., Institute for Chemistry, Ecology, Measurements and Analytics for advice on chemical analyses. The authors would also like to thank the Laboratory for Thermoenergetics for the use of the IKA Isoperibol 6000 bomb calorimeter, which was made available as part of the project "Upgrading national research infrastructures - RIUM", co-financed by the Republic of Slovenia, the Ministry of Education, Science and Sport and the European Union from the European Regional Development Fund. Part of this work was presented at the 19th Conference on Sustainable Development of Energy, Water and Environmental Systems (SDEWES) in Rome, Italy (08-12 September 2024).

29. URBANCL, Danijela, GORIČANEC, Darko, GRUBER, Sven, ROLA, Klemen. Znanstveno raziskovalno sodelovanje na tematiki trajnostne obdelave farmacevtskih bioloških odpadnih vod : poročilo. Maribor: Fakulteta za kemijo in kemijsko tehnologijo, 2025. VII, 61 str. [COBISS.SI-ID 261111299]

30. PETROVIČ, Aleksandra, TRAVNIKAR, Nina, CENČIČ, Tjaša, FINŠGAR, Matjaž, PARLOV VUKOVIĆ, Jelena, JEDNAČAK, Tomislav, NOVAK, Predrag, KERŠIČ, Pia, ROLA, Klemen, ČUČEK, Lidija. Hydrothermal conversion of lignocellulosic biomass using deep eutectic solvents and iron salts for solid biofuel and chemical recovery. Renewable energy. Oct. 2026, vol. 247, [article no.] 126186, 15 str., ilustr. ISSN 1879-0682. https://www.sciencedirect.com/science/article/pii/S0960148126010128?via%3Dihub, Digital Library of the University of Maribor – DLUM, DOI: 10.1016/j.renene.2026.126186. [COBISS.SI-ID 287020547]
project: The authors acknowledge the financial support of the Slovenian Research Agency (projects P2-0421, P2-0046, GC-0007, and J4-50149) and the Croatian Science Foundation (project HRZZ-IPS-2023-02-6614). Part of the research was conducted using equipment financed by the project “Upgrading National Research Infrastructures – RIUM”, supported by the Republic of Slovenia, the Ministry of Education, Science and Sport, and the European Union under the European Regional Development Fund. Additional support was provided by the University of Zagreb, Faculty of Science, funded by the European Regional Development Fund through the infrastructural project CIuK (grant number KK.01.1.1.02.0016). Part of this work was presented at the 20th Conference on Sustainable Development of Energy, Water and Environmental Systems (SDEWES) in Dubrovnik, Croatia (5-10 October, 2025).

31. GRUBER, Sven, ROLA, Klemen, URBANCL, Danijela, GORIČANEC, Darko. Super-long gravity heat pipe system for simultaneous heating and cooling in geothermal sites with non-linear temperature gradients. Energy. Jun. 2026, vol. 353, [article no.] 140961, str. 1-19, ilustr. ISSN 1873-6785. https://www.sciencedirect.com/science/article/pii/S0360544226010662?via%3Dihub, Digital Library of the University of Maribor – DLUM, DOI: 10.1016/j.energy.2026.140961. [COBISS.SI-ID 275158275]