Aspects of kerogen oxidative dissolution in subcritical water using oxygen from airKaldas, Kristiina; Niidu, Allan; Preegel, Gert; Uustalu, Jaan Mihkel; Muldma, Kati; Lopp, MargusOil shale2021 / p. 199-214 : ill https://doi.org/10.3176/oil.2021.3.02 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Behavior of Estonian oil shale in acidic oxidative conditionsNiidu, Allan; Grenman, Henrik; Muldma, Kati; Kaldas, Kristiina; Mikli, Valdek; Lopp, MargusFrontiers in Chemical Engineering2022 / art. 590115 https://doi.org/10.3389/fceng.2022.590115

Capillary electrophoretic analysis of calcium and magnesium acetate samples produced from oil shale industry wasteUmerenkova, Violetta; Muldma, Kati; Närep, Angelica; Mets, Birgit; Kaldas, KristiinaEuroanalysis 2025 : XXII European Conference on Analytical Chemistry : Abstract Book2025 / art. P2-074 ; p. 583 https://www.euroanalysis2025.com/images/site/abstracts/ABSTRACT_EUROANALYSIS_2025.V13.pdf

Characterization of the potential of oil shales of different geological origin for the production of dicarboxylic acids using microwave oxidationMets, Birgit; Muldma, Kati; Simm, Aia; Kontson, Tiina; Lopp, Margus; Kaldas, KristiinaJournal of thermal analysis and calorimetry2025 / 12 p https://doi.org/10.1007/s10973-025-14802-8 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Dikarboksüülhapete stabiilsus oksüdatsioonil õhuhapnikuga vesikeskkonnasKaldas, Kristiina; Preegel, Gert; Muldma, Kati; Lopp, MargusXXXIV Eesti keemiapäevad : 100. aastapäeva teaduskonverentsi teesid2019 / lk. 16 : ill

Eesti põlevkivijäätmetele otsitakse uut eluKimm, Mariliistrialoog.taltech.ee2025 https://trialoog.taltech.ee/eesti-polevkivijaatmetele-otsitakse-uut-elu/

Eesti teadlased avastasid uue viisi põlevkivi väärindamiseksPiir, Raitnovaator.err.ee2024 Eesti teadlased avastasid uue viisi põlevkivi väärindamiseks

Exploring different methods for valorising oil shale ash into calcium and magnesium acetate de-icersMuldma, Kati; Mets, Birgit; Siirde, Andres; Umerenkova, Violetta; Lopp, Margus; Kaldas, KristiinaFuture Frontiers : PhD Conference on Emerging Technologies : Book of Abstracts2025 / p. 27 ; poster 18 https://tuit.ut.ee/sites/default/files/2025-05/PhD%20Conference%202025%20Book%20of%20Abstracts_pub3.pdf

Fast reaction yield monitoring by ce analysis of dicarboxylic acids in kerogen valorisation processMuldma, Kati; Umerenkova, Violetta; Närep, Angelica; Kontson, Tiina; Kaldas, KristiinaEuroanalysis 2025 : XXII European Conference on Analytical Chemistry : Abstract Book2025 / art. P1-094 ; p. 459 https://www.euroanalysis2025.com/images/site/abstracts/ABSTRACT_EUROANALYSIS_2025.V13.pdf

Fast reaction yield monitoring by ce analysis of dicarboxylic acids in kerogen valorisation processUmerenkova, Violetta; Muldma, Kati; Närep, Angelica; Mets, Birgit; Kaldas, KristiinaEcoBalt2025 : Book of abstracts2025 / p. 50 https://ecobalt.ftmc.lt/wp-content/uploads/2025/10/EcoBalt2025_Book_of_Abstracts_V1-cor1_2025-10-24.pdf

Fast reaction yield monitoring by CE analysis of dicarboxylic acids in kerogen valorization processUmerenkova, Violetta; Närep, Angelica; Muldma, Kati; Kaldas, Kristiina; Mets, BirgitFuture Frontiers : PhD Conference on Emerging Technologies : Book of Abstracts2026 / p. 19 http://https://tuit.ut.ee/sites/default/files/2026-05/Future%20Frontiers%20PhD%20Conference%202026_Book%20of%20Abstracts.pdf

From Shale to Value : Dual Oxidative Route for Kukersite ConversionKaldas, Kristiina; Muldma, Kati; Simm, Aia; Mets, Birgit; Kontson, Tiina; Silm, Estelle; Kimm, Mariliis; Koern, Villem Ödner; Uustalu, Jaan Mihkel; Lopp, MargusProcesses2025 / art. 2421 https://doi.org/10.3390/pr13082421

Kerogeeni oksüdatiivne lahustamine veesNiidu, Allan; Kaldas, Kristiina; Grenman, H.; Eränen, K.; Preegel, Gert; Salmi, T.; Lopp, MargusXXXIV Eesti keemiapäevad : 100. aastapäeva teaduskonverentsi teesid2019 / lk. 31 : ill https://www.ester.ee/record=b1580289*est

Kerox technology : potential of piloting the production of medium chain dicarboxylic acids from kerogen in a continuous flow oxidation reactorReinaas, Maria; Kaldas, Kristiina; Muldma, Kati; Uustalu, Jaan Mihkel; Koern, Villem Ödner; Siirde, Kaarel; Silm, Estelle; Mets, Birgit; Kimm, Mariliis; Rõuk, KristiFuture Frontiers : PhD Conference on Emerging Technologies : Book of Abstracts2025 / p. 29 ; poster 20 https://tuit.ut.ee/sites/default/files/2025-05/PhD%20Conference%202025%20Book%20of%20Abstracts_pub3.pdf

Kerox technology: potential of piloting the production of medium chain dicarboxylic acids from kerogen in a continuous-flow oxidation reactorReinaas, Maria; Kaldas, Kristiina; Muldma, Kati; Uustalu, Jaan Mihkel; Koern, Villem Ödner; Siirde, Kaarel; Silm, Estelle; Mets, Birgit; Kimm, Mariliis; Rõuk, KristiFuture Frontiers : PhD Conference on Emerging Technologies : Book of Abstracts2025 / p. 29 Future Frontiers (PDF)

Laboris, kus valmis TalTechi aasta arendustöö, luuakse põlevkivile uus tulevikVaaks, Eveliis; Uusen, KaireTrialoog2025 Laboris, kus valmis TalTechi aasta arendustöö, luuakse põlevkivile uus tulevik

Methylation of Estonian kukersite kerogen – a step toward kerogen valorizationRõuk, Kristi; Kimm, Mariliis; Kaldas, Kristiina; Heinmaa, Ivo; Pehk, Tõnis; Silm, Estelle; Lopp, MargusFuture Frontiers : PhD Conference on Emerging Technologies : Book of Abstracts2026 / p. 15 https://tuit.ut.ee/sites/default/files/2026-05/Future%20Frontiers%20PhD%20Conference%202026_Book%20of%20Abstracts.pdf

Methylation of kukersite kerogen – estimation of the content of free hydroxyl groupsRõuk, Kristi; Kimm, Mariliis; Kaldas, Kristiina; Heinmaa, Ivo; Pehk, Tõnis; Silm, Estelle; Lopp, MargusOil shale2026 / p. 228-240 https://doi.org/10.3176/oil.2026.2.05 https://kirj.ee/oil-shale-publications/?v=a57b8491d1d8

Methylation of phenolsSilm, Estelle; Närep, Angelica; Kimm, Mariliis; Kaldas, Kristiina; Lopp, MargusBalticum Organicum Syntheticum (BOS 2024) : Book of Abstracts2024 / art. 126, p. 145 https://boschem.eu/bos2024/wp-content/uploads/sites/5/2024/07/BOS2024_Abstract-Book.pdf

Possibilities of the Direct Chemical Transformation of Kukersite Kerogen : A Critical ReviewLopp, Margus; Kaldas, KristiinaACS Omega2025 / p. 40740-40749 https://doi.org/10.1021/acsomega.5c04675 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Potential of producing medium chain dicarboxylic acids from kerogen in kukersite in a continuous-flow oxidation reactorReinaas, Maria; Kaldas, Kristiina; Muldma, Kati; Uustalu, Jaan Mihkel; Koern, Villem Ödner; Siirde, Kaarel; Silm, Estelle; Mets, Birgit; Kimm, Mariliis; Rõuk, KristiISCRE 28 Abstracts2024 / 2 p https://www.iscre28.org/abstracts/abstract_587_517_1.pdf

Production of snow and ice melting agents - calcium and magnesium acetates from oil shale industry combustion wasteMuldma, Kati; Mets, Birgit; Siirde, Kaarel; Siirde, Andres; Reinaas, Maria; Närep, Angelica; Uustalu, Jaan Mihkel; Koern, Villem Ödner; Lopp, Margus; Kaldas, KristiinaISCRE 28 : Abstracts2024 / 2 p https://www.iscre28.org/abstracts/abstract_588_518_1.pdf https://www.iscre28.org/abstracts.html

Reactivity of aliphatic dicarboxylic acids in wet air oxidation conditionsKaldas, Kristiina; Preegel, Gert; Muldma, Kati; Lopp, MargusIndustrial & engineering chemistry research2019 / p. 10855–10863 : ill https://doi.org/10.1021/acs.iecr.9b01643 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Structural consideration of kukersite from air oxidationKaldas, Kristiina; Uustalu, Jaan Mihkel; Niidu, Allan; Muldma, Kati; Preegel, Gert; Lopp, MargusGSFMT Scientific Conference 2021 : Tartu, June 14-15, 2021 : abstracts2021 / O 20

Sustainable synthesis of calcium and magnesium acetates from oil shale ashMuldma, Kati; Umerenkova, Violetta; Närep, Angelica; Pantšenko, Nata-Ly; Mets, Birgit; Siirde, Andres; Lopp, Margus; Kaldas, KristiinaMaterials today communications2025 / art. 114563 https://doi.org/10.1016/j.mtcomm.2025.114563 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

TalTechi teadlaste leiutis tõstab märgatavalt Eesti kõige tähtsama maavara väärtustSoopan, Ivarrohe.geenius.ee2024 TalTechi teadlaste leiutis tõstab märgatavalt Eesti kõige tähtsama maavara väärtust

The Lille-Blokker model – an excellent tool to describe the structure of kukersiteMets, Birgit; Kaldas, Kristiina; Uustalu, Jaan Mihkel; Lopp, MargusOil shale2023 / p. 234−243 https://doi.org/10.3176/oil.2023.3.04 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

The stability of dicarboxylic acids in subcriticalwet air oxidation (wao) condotions [Online resource]Kaldas, Kristiina; Preegel, Gert; Muldma, Kati; Lopp, MargusTartu Ülikooli ASTRA projekt PER ASPERA : Funktsionaalsed materjalid ja tehnoloogiad : [4.-5. veebr. 2019, Tartu : teesid]2019 / 1 p.: ill http://fmtdk.ut.ee/teesid-2019/

A two-step model for assessing the potential of shale-derived chemicals by oxidation of kukersiteMets, Birgit; Lopp, Margus; Uustalu, Jaan Mihkel; Muldma, Kati; Niidu, Allan; Kaldas, KristiinaOil shale2023 / p. 344-362 https://doi.org/10.3176/oil.2023.4.04 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Valorization of industrial waste into biodegradable deicing agentsMuldma, Kati; Mets, Birgit; Siirde, Andres; Umerenkova, Violetta; Lopp, Margus; Pantšenko, Nata-Ly; Kaldas, KristiinaEcoBalt2025 : Book of abstracts2025 / p. 122 https://ecobalt.ftmc.lt/wp-content/uploads/2025/10/EcoBalt2025_Book_of_Abstracts_V1-cor1_2025-10-24.pdf

Wet air oxidation of oil shale = Põlevkivi oksüdeerimine vees hapniku mõjulKaldas, Kristiina2021 https://www.ester.ee/record=b5472528*est https://digikogu.taltech.ee/et/Item/7b9a99ef-0748-4eef-beb7-9f0ac88f5ddb https://doi.org/10.23658/taltech.59/2021

Wet air oxidation of oil shales: kerogen dissolution and dicarboxylic acid formationKaldas, Kristiina; Preegel, Gert; Muldma, Kati; Lopp, MargusACS omega2020 / p. 22021−22030 https://doi.org/10.1021/acsomega.0c01466 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Wet air oxidation of oil shales-factors affecting dicarboxylic acids formationKaldas, Kristiina; Preegel, Gert; Muldma, Kati; Lopp, MargusGSFMT Scientific Conference 2020 : Tallinn, February 4-5, 2020 : abstracts2020 / p. 37 http://fmtdk.ut.ee/wp-content/uploads/2020/01/GSFMT2020.pdf