Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Vesislava Toteva"'
Autor:
Dicho Stratiev, Ivelina Shiskova, Vesislava Toteva, Georgi Georgiev, Rosen Dinkov, Iliyan Kolev, Ivan Petrov, Georgi Argirov, Veselina Bureva, Simeon Ribagin, Krassimir Atanassov, Svetoslav Nenov, Sotir Sotirov, Radoslava Nikolova, Anife Veli
Publikováno v:
Resources, Vol 13, Iss 6, p 86 (2024)
A comprehensive investigation of a highly complex petroleum refinery (Nelson complexity index of 10.7) during the processing of 11 crude oils and an imported atmospheric residue replacing the design Urals crude oil was performed. Various laboratory o
Externí odkaz:
https://doaj.org/article/374f4782a8434102a397f01ba2804ad1
Autor:
Nikolaos Kokkinos, Grigoria Theochari, Elissavet Emmanouilidou, Daniela Angelova, Vesislava Toteva, Anastasia Lazaridou, Sophia Mitkidou
Publikováno v:
IOP Conference Series: Earth and Environmental Science. 1123:012009
Biodiesel is a reliable and promising replacement of fossil diesel. It is stable, less toxic and can be produced from sustainable resources, including a variety of raw materials. Currently, the most widely used are vegetable oils (edible and nonedibl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::240e580999675ab92914e534d099a1df
https://doi.org/10.1088/1755-1315/1123/1/012009
https://doi.org/10.1088/1755-1315/1123/1/012009
Publikováno v:
2021 XXX International Scientific Conference Electronics (ET).
The present work aims to study the possibility of activated carbon producing from lignocellulosic biomass - oak sawdust, waste from the furniture industry. The purpose of this work is to characterize the generated cheap and available adsorbents and t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0a729f0caab9177bd8708daacf5cb27
https://doi.org/10.1109/et52713.2021.9580065
https://doi.org/10.1109/et52713.2021.9580065
Autor:
Vesislava Toteva, Ivelina Shishkova, Ekaterina Nikolaychuk, Kiril Stanulov, Dicho Stratiev, Miroslav Anastasov
Publikováno v:
Petroleum Science and Technology. 37:1463-1470
This study highlights the importance of the condition of the catalytic system in the ebullated bed vacuum residue hydrocracker on the performance of the unit, proving that not only feedstock qualit...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebb14bf44b64b44a1148ef79fe15bdec
https://doi.org/10.1080/10916466.2019.1590407
https://doi.org/10.1080/10916466.2019.1590407
Publikováno v:
Materials
Volume 14
Issue 12
Materials, Vol 14, Iss 3242, p 3242 (2021)
Volume 14
Issue 12
Materials, Vol 14, Iss 3242, p 3242 (2021)
The paper reports on the preparation of composite materials by modifying cotton fabric with a layer of crosslinked glutaraldehyde chitosan containing zinc oxide particles. The ability of chitosan to form complexes with zinc ions has been used to cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fdb83839c099bd2e0200a4451ee3759
http://europepmc.org/articles/PMC8231277
http://europepmc.org/articles/PMC8231277
Autor:
Vesislava Toteva, Desislava Staneva
Publikováno v:
2020 III International Conference on High Technology for Sustainable Development (HiTech).
Oil spills are a serious environmental, economic and social problem. The use of sorbents derived from different materials is considered to be the most effective method for their removal. In this study, we obtained novel sorbent materials based on nat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f25913b363145b9c46c62c8f7e63a04a
https://doi.org/10.1109/hitech51434.2020.9363979
https://doi.org/10.1109/hitech51434.2020.9363979
Publikováno v:
2020 III International Conference on High Technology for Sustainable Development (HiTech).
The study reports the use of wood waste biomass to obtain activated carbons. Lignocellulosic materials used as precursors are pine and beech sawdust, which is an industrial residue. Carbonization and subsequent chemical activation with potassium hydr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6e3d134a1bf4f80dff7013493f99932
https://doi.org/10.1109/hitech51434.2020.9363971
https://doi.org/10.1109/hitech51434.2020.9363971
Publikováno v:
Chemistry and Ecology. 32:976-987
Rice husks pyrolysed at different temperatures in the range of 250–700°C were investigated as adsorbents for thiophene removal from a model fuel. The adsorption ability of the samples was evaluated under both static and dynamic conditions. It was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::701d429d7809b274a479c4b59005b1b2
https://doi.org/10.1080/02757540.2016.1212850
https://doi.org/10.1080/02757540.2016.1212850
Publikováno v:
International Journal of Oil, Gas and Coal Technology. 28:259
Sixteen petroleum crudes and an imported atmospheric residue originating from Russia, Azerbaijan, Greece, Italy, Kuwait, Iraq, Iran, Saudi Arabia, Tunisia, and the USA have been processed in the LUKOIL Neftohim Burgas (LNB) refinery, and their effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c9d7d4a6b835bc07ec982011d48bb28
https://doi.org/10.1504/ijogct.2021.10041103
https://doi.org/10.1504/ijogct.2021.10041103
Publikováno v:
Fuel Processing Technology. 90:965-970
Oxidative desulphurization received attention as an alternative or an additional technology for deep fuel desulphurization. We studied oxidative desulphurization as an approach to remove sulphur organic compounds in light cycle oil. By FTIR spectrosc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f206187626af1efdda079c0f688a5de
https://doi.org/10.1016/j.fuproc.2009.03.012
https://doi.org/10.1016/j.fuproc.2009.03.012