Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Zofia Lendzion-Bieluń"'
Autor:
Walerian Arabczyk, Rafał Pelka, Agnieszka Brzoza-Kos, Ireneusz Kocemba, Paulina Rokicka-Konieczna, Katarzyna Skulmowska-Polok, Kamila Klimza, Zofia Lendzion-Bieluń
Publikováno v:
Applied Sciences, Vol 14, Iss 18, p 8452 (2024)
The kinetics of phase transformations in the nitriding process α-Fe → γ’-Fe4N → ε-Fe3-2N of the pre-reduced iron ammonia synthesis catalyst was investigated under in situ conditions (atmospheric pressure, 350 °C) by measuring changes of mas
Externí odkaz:
https://doaj.org/article/c739057b4fbd4211a5ac72c4d782dfc8
Publikováno v:
Molecules, Vol 29, Iss 15, p 3527 (2024)
Microwave-based reactions have gained traction in recent years due to their ability to enhance reaction rates and yield while reducing energy consumption. Also, according to the conception of ‘waste to materials’, various waste feeds are intensiv
Externí odkaz:
https://doaj.org/article/9e21daad536745f4b98e93b5244829a5
Publikováno v:
Crystals, Vol 14, Iss 2, p 188 (2024)
The sintering of iron ammonia synthesis catalysts (nanocrystalline iron promoted with: Al2O3, CaO and K2O) was studied under a hydrogen atmosphere, in a temperature range of 773 to 973 K to obtain stationary states. The catalysts were characterized b
Externí odkaz:
https://doaj.org/article/13e022db0cf2405bbfe03aa14defad32
Publikováno v:
Crystals, Vol 14, Iss 2, p 129 (2024)
This study presents a model of the reaction of a nanocrystalline substance within the gas phase, where diffusion of gas reactants in the volume of the nanocrystallites is a rate-limiting step. According to the model calculations carried out, the rate
Externí odkaz:
https://doaj.org/article/b9b6ca4f0f42467097fef398a3963c53
Publikováno v:
Materials, Vol 16, Iss 8, p 3242 (2023)
This article presents a two-step method of iron red synthesis based on waste long-term deposited iron(II) sulfate. The first step is the purification of waste iron sulfate, and then the pigment is synthesized by precipitation using a microwave reacto
Externí odkaz:
https://doaj.org/article/1085ce78f09d463c8d41e33780425d76
Publikováno v:
Materials, Vol 15, Iss 23, p 8309 (2022)
The influence of a magnesium oxide admixture on the activation process and catalytic activity of the iron catalyst with a wustite structure was investigated during the ammonia synthesis reaction. The incorporation of magnesium oxide into wustite grai
Externí odkaz:
https://doaj.org/article/499d5cb3ffc54531a5baf7b4dd75802e
Publikováno v:
Materials, Vol 15, Iss 5, p 1863 (2022)
This paper presents the synthesis and characteristics of Fe3O4/C/TiO2 hybrid magnetic nanomaterials with antibacterial properties. The materials used were obtained using a microwave-assisted two-stage precipitation method. In the first stage, magneti
Externí odkaz:
https://doaj.org/article/fd70c4122ddc457e8dea035e00d35e65
Publikováno v:
Materials, Vol 15, Iss 3, p 1006 (2022)
The kinetics of nanocrystalline α-iron nitriding to γ’-iron nitride in an ammonia atmosphere was studied at 598–648 K and at atmospheric pressure. Oscillatory changes in nitriding reaction rates depending on nitrogen concentration in a solid sa
Externí odkaz:
https://doaj.org/article/f13b0e8123084a84ad3e9b77462db66a
Publikováno v:
Molecules, Vol 27, Iss 3, p 648 (2022)
In the present work, a simplified model of the Fe(111) surface’s promoter-oxide system was investigated in order to experimentally verify the previously proposed and known models concerning the structure and chemical composition of the surfaces of
Externí odkaz:
https://doaj.org/article/e2235f4619e74606b4144e8e83b490ce
Publikováno v:
Materials, Vol 14, Iss 23, p 7229 (2021)
Iron catalysts for ammonia synthesis/nanocrystalline iron promoted with oxides of potassium, aluminum and calcium were characterized by studying the nitriding process with ammonia in kinetic area of the reaction at temperature of 475 °C. Using the e
Externí odkaz:
https://doaj.org/article/3999fa1476c049d9b4cd36dc04c16bee