Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Karolina Chałupka"'
Autor:
Karolina Chalupka, Renata Sadek, Laetitia Valentin, Yannick Millot, Christophe Calers, Magdalena Nowosielska, Jacek Rynkowski, Stanislaw Dzwigaj
Publikováno v:
Journal of Chemistry, Vol 2018 (2018)
Alkaline Earth metals (Mg, Sr, and Ca) were incorporated into the dealuminated mesoporous beta zeolite (DeAlBeta) by the two-step postsynthesis method. Physicochemical properties of both unmodified and alkaline Earth metal-modified DeAlBeta zeolite w
Externí odkaz:
https://doaj.org/article/8b7fa55b3d9e49cca426f37811f697ed
Publikováno v:
Molecules, Vol 29, Iss 13, p 2963 (2024)
It has been shown that the nature of the metal precursor and the thermal effects during calcination determine the physicochemical properties of the catalysts and their catalytic activity in the levulinic acid (LA) and 5-hydroxymethylfurfural (HMF) hy
Externí odkaz:
https://doaj.org/article/6e044aea0714429b8880d0bdb11bc14e
Autor:
Łukasz Szkudlarek, Karolina Chałupka-Śpiewak, Waldemar Maniukiewicz, Jadwiga Albińska, Małgorzata Iwona Szynkowska-Jóźwik, Paweł Mierczyński
Publikováno v:
Catalysts, Vol 14, Iss 4, p 260 (2024)
This work focuses on the study of biodiesel production from commercial rapeseed oil and methanol via transesterification reactions on monometallic copper and bimetallic copper–noble metal (platinum, ruthenium) catalysts supported on BEA zeolite. Th
Externí odkaz:
https://doaj.org/article/2e478fc5cb9946f88f809a1f7cbee737
Autor:
Łukasz Szkudlarek, Karolina Chałupka-Śpiewak, Waldemar Maniukiewicz, Magdalena Nowosielska, Małgorzata Iwona Szynkowska-Jóźwik, Paweł Mierczyński
Publikováno v:
International Journal of Molecular Sciences, Vol 25, Iss 7, p 3570 (2024)
Alkaline earth metal oxide (MgO, CaO, SrO) catalysts supported on BEA zeolite were prepared by a wet impregnation method and tested in the transesterification reaction of rapeseed oil with methanol towards the formation of biodiesel (FAMEs—fatty ac
Externí odkaz:
https://doaj.org/article/ab19016d5fc8404ca6ff431ce607dfd1
Autor:
Łukasz Szkudlarek, Karolina Chałupka, Waldemar Maniukiewicz, Jadwiga Albińska, Malgorzata I. Szynkowska-Jóźwik, Paweł Mierczyński
Publikováno v:
Catalysts, Vol 11, Iss 11, p 1260 (2021)
This work presents the comparative physicochemical and catalytic studies of metal oxide MgO catalysts in a transesterification reaction. The influence of the Si/Al ratio in the catalytic material on their catalytic properties in the studied process w
Externí odkaz:
https://doaj.org/article/9f3ef6b1f8a14afc8275284809574c77
Autor:
Jacek Grams, Robert Ryczkowski, Karolina Chałupka, Izabela Sobczak, Izabela Rzeźnicka, Kamila Przybysz
Publikováno v:
Materials, Vol 12, Iss 22, p 3792 (2019)
The main objective of this work was to evaluate an impact of a support on the efficiency of nickel catalysts in the high-temperature conversion of lignocellulosic biomass to hydrogen-rich gas. The most important parameters influencing catalytic perfo
Externí odkaz:
https://doaj.org/article/359ea4ae477b406ba7b66d49fd046415
Autor:
Jacek Grams, Robert Ryczkowski, Renata Sadek, Karolina Chałupka-Śpiewak, Sandra Casale, Stanislaw Dzwigaj
Publikováno v:
International Journal of Hydrogen Energy. 47:34909-34923
Autor:
Karolina Chałupka
Publikováno v:
Colloquium Mathematicum. 166:137-150
We consider the Diophantine equation $7x^{2} + y^{2n} = 4z^{3}$. We determine all solutions to this equation for $n = 2, 3, 4$ and $5$. We formulate a Kraus type criterion for showing that the Diophantine equation $7x^{2} + y^{2p} = 4z^{3}$ has no no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d79a8b440f8ded2368da0ca87bf81f3
http://arxiv.org/abs/2103.03298
http://arxiv.org/abs/2103.03298
Autor:
Renata Sadek, Karolina Chalupka-Spiewak, Jean-Marc Krafft, Yannick Millot, Laetitia Valentin, Sandra Casale, Jacek Gurgul, Stanislaw Dzwigaj
Publikováno v:
Catalysts, Vol 12, Iss 12, p 1644 (2022)
Three series of zeolite catalysts Co all-silica and Co Al-containing zeolites beta were prepared for use in the selective oxidative dehydrogenation of propane to propylene. Two series of zeolite catalysts Co all-silica were prepared by a two-step pos
Externí odkaz:
https://doaj.org/article/3331996a317c467385d7dbb128a6c9f0