@article{MTMT:34864275, title = {Study on Emulsification Effect of Crude Oil in Brine Emulsions by Automated Demulsibility Tester}, url = {https://m2.mtmt.hu/api/publication/34864275}, author = {Hartyányi, Máté and Nagy, Roland and Bartha, László and Puskás, Sándor}, doi = {10.3390/en17102438}, journal-iso = {ENERGIES}, journal = {ENERGIES}, volume = {17}, unique-id = {34864275}, issn = {1996-1073}, abstract = {The purpose of the surfactants used is to greatly reduce the interfacial tension between the crude oil and brine, thereby decreasing the capillary number. The resulting oil-in-water emulsions are often grouped according to the Winsor theory. Oil recovery aims to produce Winsor type-III emulsions because they have the lowest interfacial tension values and the most favorable flow properties. The sensitivity of oil–water–surfactant systems to environmental influences (e.g., mixing speed and equilibration time) increases close to the favorable environmental range (temperature, brine total salt concentration, pressure, etc.) of the Winsor III type, the middle microemulsion phase, which is favorable for crude oil recovery. The tests aimed to investigate the quality and quantity of emulsions prepared with surfactants used in enhanced oil recovery (EOR) using an automatic device to characterize and select surfactants for industrial petroleum applications. An essential method for surfactant selection is to study the emulsifying effect and phase behavior. Phase behavior tests and emulsifying effect tests were performed on surfactants and surfactant packages as a function of mixing parameters. The mixing speed and mixing time can influence the results of the phase behavior and emulsifying effect tests, although during the investigations, other parameters were unchanged.}, year = {2024}, eissn = {1996-1073}, pages = {2438}, orcid-numbers = {Hartyányi, Máté/0000-0001-6044-7689} } @CONFERENCE{MTMT:34864227, title = {Kalcium-szulfonát komplex kenőzsírok gyártási folyamatának egyszerűsítése új sűrítő adalék kifejlesztésével}, url = {https://m2.mtmt.hu/api/publication/34864227}, author = {Nagy, Gábor Zoltán and Pölczmann, György and Nemesnyik, Ákos and Nagy, Roland and Gerbovits, Ditta Adrienn}, booktitle = {Műszaki Kémiai Napok 2024}, unique-id = {34864227}, year = {2024}, pages = {1} } @article{MTMT:34854737, title = {A universal method for determining the detergent effect of surfactants}, url = {https://m2.mtmt.hu/api/publication/34854737}, author = {Bejczi, Rebeka and Nagy, Roland and Molnár-Kiss, Anna}, doi = {10.1016/j.mex.2024.102755}, journal-iso = {METHODSX}, journal = {METHODSX}, volume = {2024}, unique-id = {34854737}, year = {2024}, eissn = {2215-0161}, pages = {102755} } @article{MTMT:34764641, title = {An improved method for determining the water number for surfactants}, url = {https://m2.mtmt.hu/api/publication/34764641}, author = {Hartyányi, Máté and Bejczi, Rebeka and Nagy, Roland and Demcsák, Norbert and Bartha, László and Puskás, Sándor}, doi = {10.1016/j.mex.2024.102671}, journal-iso = {METHODSX}, journal = {METHODSX}, volume = {12}, unique-id = {34764641}, year = {2024}, eissn = {2215-0161}, pages = {102671}, orcid-numbers = {Hartyányi, Máté/0000-0001-6044-7689} } @article{MTMT:34043074, title = {Investigation of Some Food Industrial vegetable Oil-Based Nonionic Surfactants}, url = {https://m2.mtmt.hu/api/publication/34043074}, author = {Molnár-Kiss, Anna Viktória and Nagy, Roland}, doi = {10.1007/s12649-023-02200-w}, journal-iso = {WASTE BIOMASS VALORI}, journal = {WASTE AND BIOMASS VALORIZATION}, volume = {15}, unique-id = {34043074}, issn = {1877-2641}, abstract = {Nowadays the surfactants are used in many areas of everyday life and industry, thanks to their diverse and favourable properties. They have been used as detergents, wetting agents, emulsifiers, foaming or dispersing agents, from the food industry, through the cosmetics industry, to the heavy industry. Among surfactants, nonionic surfactants form one of the most diverse groups. Since the hydrophobic and hydrophilic parts of the non-ionic surfactant are formed due to the different polarities of the molecular parts, countless raw materials become suitable for the production of such surfactants, depending on their polarity and reactivity. In the world of surfactants, in addition to application efficiency, environmental friendliness also plays an important role. In order for a surfactant to be environmental friendly, it is necessary to strive for the best solution the conditions of production and application. In this study it was set ourselves the goal of investigating nonionic surfactants, which based on their properties, may be suitable for industrial application, while also contributing to sustainable development.}, year = {2024}, eissn = {1877-265X}, pages = {917-921} } @misc{MTMT:34484377, title = {Surfactant-Polymer Enhanced Oil Recovery Project at Algyő Field = Tenzides-Polimeres EOR Projekt Algyő mezőben}, url = {https://m2.mtmt.hu/api/publication/34484377}, author = {Puskás, Sándor and Törő, Mária and Vágó, Árpád and Ördög, Tibor and Tóth, Marianna and Kálmán, Gyula and Mátrai, Andrea and Nagy, Roland and Bartha, László and Hartyányi, Máté and Lakatos, István and Szentes, Gabriella and Dékány, Imre and Janovák, László and Geiger, János}, unique-id = {34484377}, year = {2023}, orcid-numbers = {Hartyányi, Máté/0000-0001-6044-7689; Janovák, László/0000-0002-2066-319X; Geiger, János/0000-0001-9359-5266} } @article{MTMT:34483035, title = {Study on Sulfurized Vegetable Oil Type Extreme Pressure Additives}, url = {https://m2.mtmt.hu/api/publication/34483035}, author = {Nagy, Gábor Zoltán and Nagy, Roland}, doi = {10.3303/CET23105040}, journal-iso = {CHEM ENG TR}, journal = {CHEMICAL ENGINEERING TRANSACTIONS}, volume = {105}, unique-id = {34483035}, issn = {1974-9791}, abstract = {Extreme Pressure (EP) additives are commonly used in lubricants to reduce wear and prevent seizures at high temperatures and pressure. In terms of their mechanism, these build up a film on the surface with chemisorption. This film efficiently prevents metal-metal adhesion. Industrial statistics show that extreme pressure additives are mostly used in metalworking fluids, lubricating greases and engine oils. Sulfurized vegetable oils can be used as EP additives of lubricants. This type of EP additive is ashless, derived from renewable sources and has a lesser negative effect on the environment compared to those that are not derived from vegetable sources. Several technologies for the preparation of additives have been developed, of which the dark sulfurization process has been studied. Several physical and lubricating properties of the obtained additives have been investigated, based on which, it is possible to produce additives with favourable viscosity values and low copper corrosion grade.}, year = {2023}, eissn = {2283-9216}, pages = {235-240} } @misc{MTMT:34394908, title = {EOR célú flokkulálószerek hatékonyságának vizsgálata}, url = {https://m2.mtmt.hu/api/publication/34394908}, author = {Bejczi, Rebeka and Nagy, Roland}, unique-id = {34394908}, year = {2023} } @misc{MTMT:34335404, title = {Harmadlagos kőolaj kitermelésben alkalmazható vízoldható polimerek gélkromatográfiás vizsgálati módszerének kidolgozása}, url = {https://m2.mtmt.hu/api/publication/34335404}, author = {Nagy, Roland and Hartyányi, Máté and Bartha, László and Puskás, Sándor}, unique-id = {34335404}, year = {2023}, orcid-numbers = {Hartyányi, Máté/0000-0001-6044-7689} } @misc{MTMT:34335376, title = {Kőolajipari célokra előállított tenzidkompozíciók rétegvízben való oldhatóságának vizsgálata}, url = {https://m2.mtmt.hu/api/publication/34335376}, author = {Hartyányi, Máté and Nagy, Roland and Bartha, László and Puskás, Sándor}, unique-id = {34335376}, year = {2023}, orcid-numbers = {Hartyányi, Máté/0000-0001-6044-7689} }