Наукові матеріали співробітників і студентів кафедри хімії і хімічної технології
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Browsing Наукові матеріали співробітників і студентів кафедри хімії і хімічної технології by Author "Boichenko, Sergii"
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- ItemAnalysis of rocket fuels and problems of their application on the example of Ukraine(2020) Trofimov, Ihor; Boichenko, Sergii; Shamanskyi, Sergii; Трофімов, Ігор; Бойченко, Сергій; Шаманський, СергійThe object of research is the problems of rocket fuel application, the state of art and prospects. These problems are characteristic of almost the entire range of brands of modern rocket fuels suitable for application. These are problems with the basic physic-chemical and operational properties, technical requirements for the quality of rocket fuel, problems with the functioning of the refueling infrastructure, as well as ensuring the purity of rocket fuels. Given the ban on the use of highly toxic poisonous rocket fuels based on nitric acid, there is a problem of replacing them with less toxic. This problem is aggravated by the lack of production of their own petroleum-based hydrocarbon rocket fuels in many countries. In general, it leads to acute problems with the supplying spacecraft and rocket carriers with rocket fuels. In particular, such a problem arises in Ukraine with Ukrainian-made missiles. The constant attention to the problem of the aviation and rocket fuels quality results from many factors. The research has used a comprehensive approach to fuel quality assessment, analysis of world experience, synthesis of results and retrospectives, historical-evolutionary and logical approach. High level of fuels purity provides high reliability, safety of flights, increases technical resource of engine units. Therefore, expenses for achievement and maintenance of necessary level of purity of fuel and working liquids are quite justified. The result of the research is a classification of liquid rocket fuels based on their component composition and chemical structure. Requirements to energy, kinetic, operational characteristics, ecological and economic properties of liquid rocket fuels (LRF) are formulated. Given the unsatisfactory environmental conditions, the use of kerosene as a rocket fuel is more relevant compared to heptyl rocket fuel. Jet fuels T-1, T-6, T-8B are well suited for space technology of many countries, but very few countries can produce them. Purchasing in neighboring countries is not always possible for a number of reasons. Comparative analysis shows that liquid rocket fuel RP-1 in most respects is an analogue of jet fuel T-1 and T-6 and can be used as a substitute for rocket carriers. However, the problem of development of standards and regulations on quality control of LRF during their storage and operation is not solved. In particular, there is no clear regulation for the process of refueling LRF missiles at low temperatures. There are no regulations on the content of free and dissolved water and mechanical impurities in the LRF, unlike aviation fuels. One of the promising types of rocket fuels are hydrogen fuel cells. The results of the research can be applied in the field of spacecraft operation, as well as refueling infrastructure and cleanliness of rocket fuels. The research results can also be used by chemical experts, specialists in the field of operation of refueling and storage of LRF.
- ItemComparative characteristics of proprties of jet fuel bio-additivies based on plant oils(Politechnika rzeszowska, 2019) Yakovlieva, Anna; Boichenko, Sergii; Boshkov, VasiliyThe work is devoted to the investigation of basil physical-chemical properties of various bio-additives for jet fuels was studied, in particular fatty acids methyl esters and fatty acids ethyl esters of rapeseed oil and fatty acids ethyl and fatty acids iso-butyl esters of camelina oil. The modern situation in aviation industry and its impact on environment is shown. It is found that properties of bio-additives significantly differ from properties of conventional jet fuel and, thus, they can't be used as a complete substitute of jet fuels. It is possible to use bio-additives to substitute jet fuel in quantity up to 30 %. Praca poświęcona jest badaniom wlaściwości fizykochemicznych bazylii dla różnych dodatków biologicznych do paliw lotniczych, w szczególności estrów metylowych, kwasów thuszczowych i estrów etylowych oleju rzepakowego oraz izobutylowych oleju Iniankowego. W pracy pokazano nowoczesną perspektywę w przemyśle lotniczym i je wplyw na środowisko. Stwierdzono, że właściwości biododatków znacznie ráżnią się od wlaściwości konwencjonalnego paliwa do siiników lotniczych, a zatem nie mogą byé stosowane jako calkowity substytut paliw odrzutowych. Mozliwe jest stosowanie biododatków do zastąpienia paliwa do silników lotmiczych w ilości do 30 %.
- ItemEvaluation of the potential of commercial use of microalgae in the world and in Ukraine(2020) Pavliukh, Lesia; Boichenko, Sergii; Shamanskyi, Sergii; Jaworski, ArturThis paper aims to evaluate of the microalgae potential for commercial application, in particular to conduct experimental study of biogenic compounds removal from sewage waters by microalgae, and to calculate economical benefits from biofertizers and biofuel production. Experimental study in the concentration change of nitrogen and phosphorus compounds in the cultivation of Chlorella Vulgaris microalgae in various types of sewage water was carried out. The efficiency wastewater treatment by microalgae was confirmed. The economic benefit from the biomass utilization as biofuel production was calculated. Implementation of wastewater treatment technology with biomass recycling for biofuel and biofertilizers production will minimize the impact. As a results of experimental studies, the ability of microalgae to reduce biogenic elements in wastewater was confirmed. Microalgae can be used both for wastewater treatment to biogenic elements removal, such as phosphorous and nitrogen compounds, and biofuel, biofertilizers production. Prospects of the commercial use of microalgae are obvious. They are specially adapted to an environment dominated by viscous forces.
- ItemExperimental and analytical principles of improving waste management technologies in the technosphere(Springer, Cham, 2023) Trofimov, Ihor; Boichenko, Sergii; Shkilniuk, Iryna; Yakovlieva, Anna; Shamanskyi, Sergii; Kondratyuk, Tetyana; Tarasiuk, Oksana; Трофімов, Ігор; Бойченко, Сергій; Шкільнюк, Ірина; Яковлєва, Анна; Шаманський, Сергій; Кондратюк, Тетяна; Тарасюк, ОксанаThis article provides research on waste dumps of transport infrastructure in Kyiv, and microorganisms, which are recommended to be used to neutralize petroleum products and solid organic waste, were specifically separated. The essence of the work was the selection of such strains of microorganisms that were able to absorb hydrocarbons from solid, liquid, and gaseous petroleum products without the formation of toxic products. We propose to use the potential of microorganisms, which are characterized by wide adaptation reactions in different environmental conditions, in particular, a powerful synthesis of biologically active compounds. Specifically separated and researched microorganisms-fuel destructors allow the development of cheap technologies for the utilization of diesel and aviation fuel, which is quite cost-effective for oil refineries, transport enterprises, and fuel supply facilities.
- ItemThermal treatment of charcoal for synthesis of high-purity carbon materials(Petroleum and Coal, 2020) Fedorov, Serhii; Kieush, Lina; Koveria, Andrii; Boichenko, Sergii; Sybir, Artem; Hubynskyi, Michailo; Foris, SvitlanaThe use of pure carbon materials in energy storage systems has the enormous potential for improvement of their performance. Among various carbon materials, natural and synthetic graphite is known to be the most widely used for batteries. Nonetheless, biomass as a good auxiliary carbon-containing material can also become a sustainable source of high-purity carbon material for this purpose. To examine these opportunities, a multistage technology comprised by pyrolysis of walnut shells and subsequent thermal purification of carbon residue at 3000 °C has been studied. As a result, high-purity carbon material has been synthesized, it can find the application in energy storage systems, for instance, lithium-ion batteries.