TY - JOUR AU - Arany, Dóra AU - Kőrösi, Márton AU - Kózelné Székely, Edit TI - A new, automated method for the investigation of melting point depression under carbon dioxide pressure JF - JOURNAL OF CO2 UTILIZATION J2 - J CO2 UTIL VL - 80 PY - 2024 PG - 6 SN - 2212-9820 DO - 10.1016/j.jcou.2023.102663 UR - https://m2.mtmt.hu/api/publication/34533649 ID - 34533649 N1 - Export Date: 26 January 2024 Correspondence Address: Kőrösi, M.; Department of Chemical and Environmental Process Engineering, Műegyetem rkp. 3., Hungary; email: mkorosi@edu.bme.hu Funding details: Budapesti Műszaki és Gazdaságtudományi Egyetem, BME Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA, 2019-1.3.1-KK-2019–00004 Funding text 1: This work was supported by the New National Excellence Program of the Ministry of Culture and Innovation, financed by the National Research, Development and Innovation Fund . (Personal reference number ÚNKP-22-2-III-BME-91 ). Project no. 2019-1.3.1-KK-2019–00004 has been implemented with the support provided by the National Research, Development and Innovation Fund of Hungary, financed under the 2019-1.3.1-KK funding scheme. The project supported by the Doctoral Excellence Fellowship Programme ( DCEP ) is funded by the National Research Development and Innovation Fund of the Ministry of Culture and Innovation and the Budapest University of Technology and Economics, under a grant agreement with the National Research, Development and Innovation Office. This work was supported by the Michael Somogyi Program of the Varga József Foundation and the Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics . . AB - The aim of this work was to develop a new, automated method for the detection of solid-liquid phase transitions in the presence of high-pressure carbon dioxide. This is allowed because of the dissolution of the medium in the sample during the solid-liquid-gas equilibrium measurement. The pressure of an empty reference cell and one containing a solid sample is compared by a differential pressure transmitter. A gradual heating program is conducted after their equal pressurization. The solid-liquid transition of the sample is marked by a sharp decrease in the pressure of the sample holder (compared to the reference cell). A processing algorithm for the recorded time – temperature – pressure-difference data was implemented, to determine the melting temperature range accurately and automatically. The apparatus was validated with racemic ibuprofen and benzoic acid, and provides a new, objective, and easy-to-automate alternative to determine the melting temperature in high-pressure carbon dioxide. © 2024 LA - English DB - MTMT ER - TY - JOUR AU - Kőrösi, Márton AU - Kántor, Petra AU - Bana, Péter AU - Kózelné Székely, Edit TI - Continuous Stripping with Dense Carbon Dioxide JF - ACS OMEGA J2 - ACS OMEGA VL - 8 PY - 2023 IS - 49 SP - 46757 EP - 46762 PG - 6 SN - 2470-1343 DO - 10.1021/acsomega.3c06087 UR - https://m2.mtmt.hu/api/publication/34470949 ID - 34470949 N1 - Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3, Budapest, H-1111, Hungary Richter Gedeon NyRt., Gyömrői út 19-21, Budapest, H-1103, Hungary Export Date: 2 January 2024 Correspondence Address: Székely, E.; Department of Chemical and Environmental Process Engineering, Műegyetem rakpart 3, Hungary; email: edit.szekely@edu.bme.hu Funding details: TKP2021-EGA-02 Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding text 1: This work is related to the National Research, Development, and Innovation Fund of Hungary in the frame of FIEK_16-1-2016-0007 (Higher Education and Industrial Cooperation Center). Project no. TKP2021-EGA-02 has been implemented with the support provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-EGA funding scheme. The authors of the paper are highly grateful to Dr. Ildikó Kmecz for the fruitful discussions and Ms. Enikő Kincses, Mr. Zsolt Hovonyecz, and Mr. Mátyás Kiss for their participation in the experimental work. AB - The integration of flow chemistry into continuous manufacturing requires efficient, controllable, and continuous methods for the concentration of diluted solutions on relatively small scales. The design and application examples of a new continuous solvent removal process are presented. The continuous stripping method employing dense carbon dioxide is based on the formation of homogeneous mixtures of dilute organic solutions of the target molecules with a large excess of carbon dioxide at temperatures as low as 35 °C and pressures around 10 MPa. Subsequent pressure reduction results in the quick release of carbon dioxide and vaporization of a significant fraction of the organic solvent. The concentration of the solute in the separated liquid phase can be up to 40 times higher than in the feed. Among the many controllable process parameters, the most significant ones are the mass-flow rate ratio of carbon dioxide to the feed and the temperature of the phase separator. By careful setting of the operational parameters, the degree of concentration enhancement may be accurately controlled. The new apparatus─despite consisting of laboratory equipment and being built in a fume hood─could easily support pilot-scale synthetic flow chemistry, being a continuous, efficient alternative to thermal concentration methods. © 2023 The Authors. Published by American Chemical Society LA - English DB - MTMT ER - TY - BOOK ED - Kózelné Székely, Edit TI - 19th European Meeting on Supercritical Fluids. EMSF 2023 TS - EMSF 2023 PB - Budapest University of Technology and Economics CY - Budapest PY - 2023 SP - 177 SN - 9789634219248 UR - https://m2.mtmt.hu/api/publication/34042163 ID - 34042163 LA - English DB - MTMT ER - TY - JOUR AU - Kőrösi, Márton AU - Varga, Csaba AU - Tóth, Péter AU - Buczkó, Noémi AU - Varga, Erzsébet AU - Kózelné Székely, Edit TI - Experimental Determination of a Chiral Ternary Solubility Diagram and Its Interpretation in Gas Antisolvent Fractionation JF - MOLECULES J2 - MOLECULES VL - 28 PY - 2023 IS - 5 SN - 1420-3049 DO - 10.3390/molecules28052115 UR - https://m2.mtmt.hu/api/publication/33663382 ID - 33663382 N1 - Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary Cyclolab Cyclodextrin Research and Development Laboratory Ltd, 7. Illatos út, Budapest, H-1097, Hungary CODEN: MOLEF Correspondence Address: Kőrösi, M.; Department of Chemical and Environmental Process Engineering, Műegyetem rkp. 3, Hungary; email: mkorosi@edu.bme.hu AB - Although crystallization has been widely applied for the enantiomeric enrichment of non-racemates both in research and in industrial applications, the physical–chemical background of chiral crystallizations is not as frequently discussed. A guide for the experimental determination of such phase equilibrium information is lacking. In the current paper, the experimental investigation of chiral melting phase equilibria, chiral solubility phase diagrams and their application in atmospheric and supercritical carbon dioxide-assisted enantiomeric enrichment is described and compared. Benzylammonium mandelate is a racemic compound; it shows eutectic behavior when molten. A similar eutonic composition was observed in its methanol phase diagram at 1 °C. The influence of the ternary solubility plot could be unequivocally discovered in atmospheric recrystallization experiments, which proved that the crystalline solid phase and the liquid phase were in an equilibrium. The interpretation of the results obtained at 20 MPa and 40 °C, using the methanol–carbon dioxide mixture as a pseudo-component, was more challenging. Although the eutonic composition was found to be the limiting enantiomeric excess value in this purification process as well, the high-pressure gas antisolvent fractionation results were only clearly thermodynamically controlled in certain concentration ranges. LA - English DB - MTMT ER - TY - CHAP AU - Arany, Dóra AU - Kőrösi, Márton AU - Kózelné Székely, Edit ED - Takács, Dóra ED - Vargáné, Árok Zsófia TI - Új, automatizálható, nyomás alatti olvadáspont mérő műszer fejlesztése T2 - XLV. Kémiai Előadói Napok PB - Magyar Kémikusok Egyesülete (MKE) CY - Szeged SN - 9786156018151 PY - 2022 UR - https://m2.mtmt.hu/api/publication/33674854 ID - 33674854 LA - Hungarian DB - MTMT ER - TY - JOUR AU - SHIVA SHANKAR, LAKSHMI AU - Zalka, Dóra AU - Szabó, Tamás AU - Kózelné Székely, Edit AU - Kőrösi, Márton AU - Pászti, Zoltán AU - Balázsi, Katalin AU - Illés, Levente AU - Czigány, Zsolt AU - Kun, Róbert TI - Supercritical carbon dioxide assisted synthesis of ultra-stable sulfur/carbon composite cathodes for Li– S batteries JF - MATERIALS TODAY CHEMISTRY J2 - MATER TODAY CHEM VL - 26 PY - 2022 PG - 13 SN - 2468-5194 DO - 10.1016/j.mtchem.2022.101240 UR - https://m2.mtmt.hu/api/publication/33215064 ID - 33215064 AB - To mitigate the shuttle effect and enhance the electrical conductivity in lithium battery cathode, the unique characteristics of supercritical CO2 solvent (SC–CO2) and the distinctive porous and layered microstructure of reduced graphene oxide (rGO) are exploited in the fabrication of a high-performance rGO/sulfur composite cathode. Exploiting SC-CO2 technology can realize highly efficient sulfur transfer and precise microstructure regulation of S/C composite cathodes for Li–S batteries. On exposure, due to the sudden pressure release process, the SC-CO2 expands the interlayers of rGO rendering plenty of storage space for small sulfur allotropes in carbon matrices which increases the active sulfur loading. Being a remarkable hydrophobic solvent, the wetting properties of SC-CO2 are excellent, ensuring sulfur dissolution and penetration deep into the voids and interlayers of rGO. This creates intimate contact of sulfur with rGO interlayers, guaranteeing precise sulfur content, uniform sulfur distribution, and strong interaction between sulfur and carbon leading to enhanced electrical conductivity and sulfur utilization efficiency. Another important feature is that the S/C composites can be prepared at room temperature, unlike other conventional techniques which require a higher temperature. Moreover, the product mixture can be separated simply by de-pressuring SC-CO2. Herein, the rGO/sulfur composite cathode prepared on a lab scale showed an initial discharge capacity of 1024 mAh/g at 0.1C rate with capacity retention of 92.2% and coulombic efficiency of 99% even after 200 charge-discharge cycles. The developed cells showed excellent performance (929 mAh/g at 1 C rate) with an ultralow decay of 0.04% per cycle even after 200 charge-discharge cycles. Through this work, we believe that the synergistic effect of SC-CO2 technology and rGO as sulfur host will open up a promising future for the synthesis of efficient S/C composite cathodes with ultra-high cycling stability. LA - English DB - MTMT ER - TY - JOUR ED - Hornyánszky, Gábor / Arranged for publication by ED - Kózelné Székely, Edit / Arranged for publication by TI - Középiskolai tehetséggondozás a BME Vegyészmérnöki és Biomérnöki Karán JF - MAGYAR KÉMIKUSOK LAPJA J2 - MAGY KEM LAP VL - 77 PY - 2022 IS - 6 SP - 177 EP - 178 PG - 2 SN - 0025-0163 UR - https://m2.mtmt.hu/api/publication/33112641 ID - 33112641 LA - Hungarian DB - MTMT ER - TY - JOUR ED - Hornyánszky, Gábor / Arranged for publication by ED - Kózelné Székely, Edit / Arranged for publication by TI - A BME-n kémiát oktatók véleménye az elsőévesek kémiatudásáról és kémiai iránti elkötelezettségéről – avagy mi segítené a mi munkánkat? JF - MAGYAR KÉMIKUSOK LAPJA J2 - MAGY KEM LAP VL - 77 PY - 2022 IS - 6 SP - 174 EP - 176 PG - 3 SN - 0025-0163 UR - https://m2.mtmt.hu/api/publication/33112640 ID - 33112640 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Lukic, I. AU - Pajnik, J. AU - Nisavic, J. AU - Tadic, V. AU - Vági, Erika AU - Kózelné Székely, Edit AU - Zizovic, I. TI - Application of the Integrated Supercritical Fluid Extraction–Impregnation Process (SFE-SSI) for Development of Materials with Antiviral Properties JF - PROCESSES J2 - PROCESSES VL - 10 PY - 2022 IS - 4 SN - 2227-9717 DO - 10.3390/pr10040680 UR - https://m2.mtmt.hu/api/publication/32799387 ID - 32799387 N1 - Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, 11120, Serbia Innovation Center of the Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, 11200, Serbia Faculty of Veterinary Medicine, University of Belgrade, Bulevar Oslobođenja 18, Belgrade, 11000, Serbia Institute for Medical Plant Research “Dr Josif Pancic”, Tadeusa Koscuska 1, Belgrade, 11000, Serbia Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, Budapest, H-1521, Hungary Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, Wroclaw, 50-370, Poland Export Date: 29 April 2022 Correspondence Address: Lukic, I.; Faculty of Technology and Metallurgy, Karnegijeva 4, Serbia; email: ilukic@tmf.bg.ac.rs Correspondence Address: Zizovic, I.; Faculty of Chemistry, Wybrzeze Wyspianskiego 27, Poland; email: irena.zizovic@pwr.edu.pl LA - English DB - MTMT ER - TY - CHAP AU - Arany, Dóra AU - Kőrösi, Márton AU - Mihalovits, Máté AU - Béri, János AU - Kózelné Székely, Edit ED - Molnár, Dániel ED - Molnár , Dóra TI - 3-Klórmandulasav olvadási hőmérsékletének vizsgálata szuperkritikus szén-dioxid és szerves oldószerek nagynyomású elegyében T2 - XXIV. Tavaszi Szél Konferencia 2021: Absztrakt kötet PB - Doktoranduszok Országos Szövetsége (DOSZ) CY - Budapest SN - 9786155586996 PY - 2021 SP - 279 EP - 280 PG - 2 UR - https://m2.mtmt.hu/api/publication/33674819 ID - 33674819 LA - Hungarian DB - MTMT ER -