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Chemia Zeszyt 1 Ch (4) 2016

2016 Następne

Data publikacji: 21.11.2016

Licencja: Żadna

Redakcja

Redaktor naczelny Józef Gawlik

Sekretarz redakcji Dorota Sapek

Zawartość numeru

Gabriela Berkowicz, Dariusz Bradło, Witold Żukowski

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 3-10

https://doi.org/10.4467/2353737XCT.16.041.5303

In this paper, the possibility of achieving a stable fluidised bed made of the cenospheres was examined. Cenospheres are the waste material from hard coal power plants. This material is perfectly spherical, and it is thin-walled and filled with gases (mainly CO2, N2). Because of their low density, particle size and sphericity, cenospheres can be easily fluidised even at low flow rates of the fluidising medium. Moreover, the application of acoustic waves during the fluidisation of cenospheres removes the apparent effect of double stationary states and moves the minimum fluidisation velocity into lower gas flow rates.

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Małgorzata Djas, Marek Henczka

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 11-18

https://doi.org/10.4467/2353737XCT.16.042.5304

This paper presents the investigation results of mixing effects on the course of reactive extraction of citric acid from an aqueous solution, with the use of supercritical CO2 and tertiary aliphatic amines. The influence of the mixing rate and the mixing time on the efficiency of the considered process has been studied. This paper also presents the influence of the tertiary amine chain length and the molar ratio of reactants on the efficiency of the process.

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Katarzyna Z. Gaca

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 19-26

https://doi.org/10.4467/2353737XCT.16.043.5305

The paper summarises the findings of the most significant studies on the effect that the catalyst has on the formation and properties of organic gels, synthesised via the sol-gel method from resorcinol and formaldehyde. These materials exhibit excellent electrical and mechanical properties, as well as have great specific surface areas, and thus are excellent materials for manufacturing electrodes in a variety of appliances, from rechargeable batteries to supercapacitors. The properties of these gels can be adjusted to meet the desired values, however, they are controlled by a number of factors. The most interesting of these is the catalyst and its role, as it is elusive and has been investigated only by several authors across the globe.

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Artur Gunia, Barbara Larwa, Krzysztof Kupiec

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 27-37

https://doi.org/10.4467/2353737XCT.16.044.5306

Simple cases of heat conduction in the ground are presented. Systems without interaction with the ground surface are considered. For heating or cooling of the ground by a flat slab, an analytical solution was used. Heat transfer between the ground and a single pipe and several parallel pipes is also considered. In these cases, a numerical solution was used. The analysed problems are of practical importance for modelling and simulation of ground heat exchangers cooperating with heat pumps.

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Tadeusz Komorowicz, Krzysztof Neupauer, Katarzyna Sabat, Aneta Głuszek

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 39-48

https://doi.org/10.4467/2353737XCT.16.045.5307

The paper presents the results of laboratory tests of both a photovoltaic module formed of 36 multicrystalline silicon cells and a four-module generator, in the form of voltage-current characteristic curves. An analysis of the obtained data is conducted as well.

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Joanna Kuc, Adam Grochowalski, Tomasz Świergosz

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 49-56

https://doi.org/10.4467/2353737XCT.16.046.5308

A study on the correlation between the concentration of hexabromocyclododecane and the percentage of fat in meat tissues of selected marine fish species, both marine and farmed, has been carried out. The relationships between variables based on a determination of the coefficients of linear correlation r-Pearson were determined and graphs illustrating these dependencies were presented.

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Barbara Larwa, Mikołaj Teper, Krzysztof Kupiec

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 57-67

https://doi.org/10.4467/2353737XCT.16.047.5309

This paper concerns the basics of modelling ground heat exchangers. Several specific cases were described, for which computational dependencies and calculation results were presented. Models based on analytical solutions were considered as well as models that use computer applications based on numerical calculations.

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Magdalena Malinowska, Karolina Śliwa, Elżbieta Sikora, Jan Ogonowski

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 69-75

https://doi.org/10.4467/2353737XCT.16.048.5310

The paper describes chosen methods for the extraction and qualitative analysis of the main polyphenolic compounds contained in apple pomace. Apple pomace is a by-product generated during apple juice production. The extracts were obtained with the Ultrasound Assisted Micelle Mediated Extraction (UAMME) method using a 1% Rocanol B2 water solution, as well as the Ultrasound Assisted Extraction (UAE) method in water. Thin Layer Chromatography (TLC) and UV/VIS spectroscopy were applied as analytical methods in order to identify the main polyphenolic substances in the obtained extracts. The obtained results showed that both UAMME as well as UAE are effective methods for obtaining quercetin, catechin and rutin.

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Marta Marszałek, Zygmunt Kowalski, Agnieszka Makara

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 77-90

https://doi.org/10.4467/2353737XCT.16.049.5311

Pig slurry is a by-product of non-bedding pig farming. It is a heterogeneous liquid mixture of faeces, urine, spilt feed and water used for waste removal. As it carries large amounts of organic and biogenic substances, slurry can pose a risk for the natural environment; therefore, it should be properly managed. This paper presents methods for the recovery of water and fertilising components from pig slurry using low-pressure (microfiltration, ultrafiltration) and high-pressure (nanofiltration, reverse osmosis) membrane techniques.

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Małgorzata Miastkowska, Elżbieta Sikora, Jan Ogonowski

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 91-100

https://doi.org/10.4467/2353737XCT.16.050.5312

NANOEMULSJE NA BAZIE WYBRANYCH OLEJÓW Z NASION OWOCÓW JAGODOWYCH

Celem pracy było otrzymanie nanoemulsji O/W, w których rolę fazy olejowej pełnił ekstrakt z nasion truskawki lub czarnej porzeczki otrzymany w warunkach nadkrytycznego CO2 (SCCO 2). Układy emulsyjne otrzymano metodą składnikowej inwersji faz, w T = 25°C. Jako surfaktant zastosowano Polisorbat 80, rolę kosurfaktantu pełnił Natragem S150. Kinetyczną stabilność otrzymanych formulacji badano poprzez pomiar wielkości cząstek nanoemulsji (technika DLS) w czasie, dla układów o różnym stosunku wagowym surfaktant: olej (S:O) oraz surfactant/kosurfaktant (S/CoS). Otrzymane rezultaty wykazały, że najmniejszym rozmiarem cząstek fazy wewnętrznej (r = 15 nm), niskim indeksem polidyspersyjności (PDI = 0.246) oraz najdłuższą kinetyczną stabilnością charakteryzowała się nanoemulsja na bazie oleju z nasion czarnej porzeczki (S:CoS = 8:2, S/CoS:O = 9:1). 

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Krzysztof Neupaper, Tadeusz Komorowicz, Krzysztof Kupiec

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 101-110

https://doi.org/10.4467/2353737XCT.16.051.5313

A mathematical model of water cooling in a vertical tank with non-uniform initial temperature has been presented in this paper. This kind of process is important in solar installations. Calculation results for various cases comprising, among others, two or three layers of water with different initial process temperatures as well as various combinations of heat resistance of the side wall, the tank bottom and the tank cover, have been given as well.

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Anna Sienkiewicz, Piotr Czub

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 111-123

https://doi.org/10.4467/2353737XCT.16.052.5314

The paper presents the results of studies on the synthesis and mechanical properties of the fusion product of epoxidized soybean oil with bisphenol A, which are a part of the current research on environmentally friendly raw materials for the preparation and modification of modern polymeric materials. It has been shown that the use of 4,4’-methylene diphenyl diisocyanate in the cross-linking process of the fusion product in the presence of Dabco 33-LV and BYK-A530 or BYK-A525 gives hard materials with interesting mechanical properties.

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Adam Żaba, Svitlana Sovinska, Wiktor Kasprzyk, Dariusz Bogdał, Katarzyna Matras-Postołek

Czasopismo Techniczne, Chemia Zeszyt 1 Ch (4) 2016, 2016, s. 125-134

https://doi.org/10.4467/2353737XCT.16.053.5315

Zinc sulphide (ZnS) is one of the first discovered semiconducting materials, which due to their unique properties can be applied in optoelectronic devices, such as ultraviolet-light-emitting diodes, flat-panel displays, electroluminescent and sensors. As we present in this short review, the properties of ZnS are highly dependent on their size, structural form and morphology. Nowadays, one-dimensional (1D) structures of ZnS have been of great interest, mainly due to their luminescent and electrical properties.

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