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1
Content available remote

The influence of hygienisation of sewage sludge on the process of pyrolysis

100%
Čížková A., Juchelková D., Raclavská H.
Chemical and Process Engineering
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2011
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vol. 32
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issue 1
57-68
EN
The aim of this work was to determine the influence of liming on the process of pyrolysis. Three samples of sludge from two wastewater treatment plants were selected for this study on pyrolysis: sludge without liming and limed sludge from the Central Wastewater Treatment Plant in Ostrava and sludge from the Wastewater Treatment Plant in Sviadnov. The samples had different content of calcite (CaCO3). The limed sludge contained 7% of CaCO3, sludge without liming 3.8% and sludge without liming from WWTP Sviadnov contained 0.5% of calcite. The results of laboratory pyrolysis proved that limed sludge released the maximum amount of carbon - 55.46 %, while sludge without liming from WWTP Sviadnov released only 48.92%. Calcite produces during its decomposition CaO and the product influences the pyrolysis process because it supports cracking of volatile organic compounds
2
Publication available in full text mode
Content available

Characteristics of single wood particle pyrolysis using particle image velocimetry

100%
Kardaś D., Kluska J., Ronewicz K.
Archives of Thermodynamics
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2018
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vol. 39
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issue 2
3
Content available remote

Plasma recycling of chloroorganic wastes

100%
Jędrzejczyk T., Kołaciński Z., Koza D., Raniszewski G., Szymański Ł., Wiak S.
Open Chemistry
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2015
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vol. 13
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issue 1
EN
A high temperature of thermal plasma provides more efficient decomposition of the wastes in comparison to traditional combustion. Due to the high temperature and high density of energy in the plasma, the destruction rate is high, which determines a high efficiency waste decomposition. The main products of pyrolysis plasma chloroorganic compounds are pyrolysis gas and pyrolysis coke. In order to reduce carbon soot, the steam supported reaction was used. Application of plasma at a temperature range from 1000 to 1750 K enabled destruction of the chloroorganic compounds with a very good yield. Several degradation products were received , which were analyzed. In the research electric arc plasma was used in the process of pyrolysis chloroorganic waste utilization. The reactor with a rotating arc was applied. Selected chloroorganic compounds were selected as the model: chloromethane (CH3Cl), carbon tetrachloride (CCl4), chlorobenzene (C6H5Cl) and dichlorobiphenyl (PCB-C12H8Cl2). Based on the amount of the individual components, chloroorganic in the exhaust gases, and the amount introduced to the plasma decomposition, percentage yield was calculated. Research results indicated that decomposition efficiency was more than 99,8% with the exception of CCl4 pyrolysis, which in the exhaust had a content of 0.2% CCl4.
4
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Prediction of coking dynamics for wet coal charge

100%
Kardaś D., Polesek-Karczewska S., Ciżmiński P., Stelmach S.
Chemical and Process Engineering
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2015
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vol. 36
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issue 3
291-303
EN
A one-dimensional transient mathematical model describing thermal and flow phenomena during coal coking in an oven chamber was studied in the paper. It also accounts for heat conduction in the ceramic oven wall when assuming a constant temperature at the heating channel side. The model was solved numerically using partly implicit methods for gas flow and heat transfer problems. The histories of temperature, gas evolution and internal pressure were presented and analysed. The theoretical predictions of temperature change in the centre plane of the coke oven were compared with industrialscale measurements. Both, the experimental data and obtained numerical results show that moisture content determines the coking process dynamics, lagging the temperature increase above the water steam evaporation temperature and in consequence the total coking time. The phenomenon of internal pressure generation in the context of overlapping effects of simultaneously occurring coal transitions - devolatilisation and coal permeability decrease under plastic stage - was also discussed.
5
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Application of pyrolysis-capillary gas chromatography with NPD detection in thermal degradation of polyphosphazenes study

100%
Paulsdorf J., Wiemhöfer H.-D., Orinák A., Zámostný P., Bělohlav Z., Baxter D.
Open Chemistry
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2007
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vol. 5
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issue 1
271-290
EN
Polyphosphazenes represent a unique class of polymers with a backbone composed of alternating phosphorous and nitrogen atoms. The thermal behaviour and decomposition of a variety of polyphosphazenes depends on the type of side groups present. Especially those that bear aryloxy side groups, possess a high temperature stability as well as excellent flame resistance. Pyrolysis-capillary gas chromatography has been used in a study of three polyphosphazene samples for thermal stability characterisation. Degradation products were detected with three single detectors for flame ionisation (FID), nitrogen-phosphorous sensitivity (NPD) and mass spectrometry (MSD) at different pyrolysis temperatures ranging from 300°C up to 800°C. The NPD responses for phosphorous or nitrogen fragments of polyphosphazenes have been used for the construction of degradation product schemes and the examination of the thermal stability of the polyphosphazene’s backbone. Partial identification of the degradation products present in the gaseous phase was achieved by MSD. The polyphosphazenes thermal degradation conversion rates were at a maximum at 450–500°C. At various pyrolysis temperatures, the calculated N/P peak area ratio is a function of the degree of polyphosphazene-N=P-chain degradation, and reflective of the nitrogen - phosphorous detector sensitivity. NPD proved to be suitable tool for characterization of polyphospazene thermal stability.
6
Publication available in full text mode
Content available

Prediction of coking dynamics for wet coal charge

88%
Kardaś D., Polesek-Karczewska S., Ciżmiński P., Stelmach S.
Chemical and Process Engineering
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2015
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issue 3
7
Content available remote

Thermal decomposition of acrylic pressure-sensitive adhesives

88%
Czech Z., Pełech R., Zych K.
Polish Journal of Chemical Technology
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2009
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vol. 11
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issue 4
7-12
EN
The general aim of this article is to review the state of knowledge on pressure-sensitive adhesives (PSAs) and pyrolysis. Recent research data in the field of pyrolysis gas- chromatography (Py-GC) analysis of acrylic PSAs are presented. First, PSA characteristics and applications, pyrolysis (including Py-GC) as an analytical method, and system solutions, are described. The latest scientific achievements in the analysis of thermal degradation products of acrylic PSAs are then presented.
8
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Application of the TG-MS system in studying sewage sludge pyrolysis and gasification

88%
Bedyk T., Nowicki L., Stolarek P., Ledakowicz S.
Polish Journal of Chemical Technology
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2008
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vol. 10
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issue 1
1-5
EN
A method of monitoring sewage sludge pyrolysis and gasification was proposed. Samples of sludge were pyrolysed in Ar and gasified in CO2 in a thermobalance. The evolved gases were analysed on the calibrated MS, the samples of sludge and solid residues at different stages of the processes were subjected to elemental analysis. The identification and the quantitative characterisation of chemical reactions were performed, based on the DTG and MS profiles.
9
Publication available in full text mode
Content available

The influence of hygienisation of sewage sludge on the process of pyrolysis

88%
Čížková A., Juchelková D., Raclavská H.
Chemical and Process Engineering
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2011
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issue 1
10
Content available remote

Energy Balance Sheet of a Semi Operational Thermic System

88%
Honus S., Sassmanová V., Frantík J., Bukowsk P., Juchelková D.
Chemical and Process Engineering
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2014
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vol. 35
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issue 3
317-329
EN
The article is focused onthe energetical balance of a technical system for the conversion of crushed tyres by pyrolysis. Process temperatures were set in the range from 500 to 650°C. Mass input of the material was 30 kg per hour. The aim of the article is to answer the following questions as regards the individual products: Under which process conditions can the highest quality of the individual products related to energy be reached? How does the thermal efficiency of the system change in reaction to various conditions of the process? On the basis of the experimental measurements and calculations, apart from other things, it was discovered that the pyrolysis liquid reaches the highest energetic value, i.e. 42.7 MJ.kg-1, out of all the individual products of the pyrolysis process. Generated pyrolysis gas disposes of the highest lower calorific value 37.1 MJ.kg-1 and the pyrolysis coke disposes of the maximum 30.9 MJ kg-1. From the energetic balance, the thermal efficiency of the experimental unit under the stated operational modes ranging from about 52 % to 56 % has been estimated. Individual findings are elaborated on detail in the article.
11
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Modelling and experimental investigation of waste tyre pyrolysis process in a laboratory reactor

88%
Rudniak L., Machniewski P. M.
Chemical and Process Engineering
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2017
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vol. 38
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issue 3
12
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Application of pyrolysis residue from waste materials in black coal flotation

88%
Fečko P., Kašpárková A., Pertile E., Kříž V., Tora B., Jarosiński A., Janáková I.
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EN
The paper deals with the verification of the floatability of pyrolytic oils, which were obtained through the pyrolysis of waste, namely mixed plastics, tyres and waste rubber in combination with black coal from Lazy Mine, and classical collector Montanol 551 in black coal flotation. Black coal from ČSA OKD, a.s. coal preparation plant was used for flotation tests. The results imply that it is possible to produce collectors from waste materials which may be applied in the flotation of black coal. Next, the paper focused on the identification of a suitable combination of pyrolytic oils and Montanol 551 in order to reach ash content in the concentrate below 10%.
13
Content available remote

Pyrolysis Process of Whole Waste Tires as A Biomass Energy Recycling / Piroliza Opon Samochodowych Jako Energetyczny Recykling Biomasy

75%
Ryms M., Januszewicz K., Lewandowski W. M., Klugmann-Radziemska E.
Ecological Chemistry and Engineering S
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2013
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vol. 20
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issue 1
93-107
EN
The article is devoted to the description of material recycling of whole waste tires, including a new method of pyrolysis process, resulting in the final products: technically oil fractions (rubber plasticizer of rubber compounds) or diesel fuels (light, medium and heavy), activated carbon, gas fuel and steel scrap. Operational and performance tests of the first version of the pilot plant, consisting of three contributions cooperating with one pyrolytic reactor confirmed that this technology is applicable but has still some flaws and errors, both structural and technological. Usually such errors in the first test of technology development cannot be avoided. This paper describes: pyrolysis processes which occurs in the pilot plant, protected by a patent application design of continuously working prototype installation for recycling of tire and identifies future directions of research in this field
PL
Artykuł poświęcony jest opisowi recyklingu materiałowego całych opon samochodowych z uwzględnieniem nowej metody procesu pirolitycznego, w wyniku którego produktem końcowym są: frakcje oleju technicznego (plastyfikator mieszanek gumowych), opałowego lub napędowego (lekkiego, średniego i ciężkiego), węgiel aktywny, gaz opałowy i złom stalowy. Badania ruchowe i eksploatacyjne pilotażowej instalacji, składającej się z trzech wkładów współpracujących z jednym reaktorem pirolitycznym, wykazały, że technologia ta jest możliwa do zastosowania, ale posiada jeszcze pewne wady i błędy zarówno konstrukcyjne, jak i technologiczne, których zazwyczaj nie udaje się uniknąć w pierwszej próbie opracowywania technologii. W pracy opisano zachodzące w wysokich temperaturach procesy pirolityczne, chroniony zgłoszeniem patentowym projekt prototypowej instalacji do recyklingu opon w sposób ciągły oraz wskazano przyszłe kierunki badań w tym zakresie. W pracy opisano procesy pirolityczne zachodzące w pilotażowej instalacji oraz opracowany, na podstawie uzyskanych wyników i zebranych doświadczeń, projekt prototypowej instalacji do recyklingu opon w sposób ciągły, który jest chroniony zgłoszeniem patentowym. Na zakończenie wskazano przyszłe kierunki badań w tym zakresie.
14
Publication available in full text mode
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Pyrolysis of waste tyres – The effect of reaction kinetics on the results of thermogravimetric analysis

75%
Cherbański R., Molga E., Wróblewski K.
Chemical and Process Engineering
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2017
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vol. 38
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issue 3
15
Publication available in full text mode
Content available

Determination of Content of Phenol in Foundry Resins by Pyrolysis Gas Chromatography-Mass Spectrometry Method

75%
Żymankowska-Kumon S.
Archives of Foundry Engineering
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2018
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issue 4
16
Content available remote

Thermal degradation of poly(alkyl methacrylates) and polyurethane pressure-sensitive adhesives

75%
Zych K., Pełech R., Czech Z.
Polish Journal of Chemical Technology
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2010
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vol. 12
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issue 4
40-43
EN
Gas chromatography, coupled with the temperature controlled pyrolysis technique, can be used as a quick method of identification of polymers such as acrylates, methacrylates and polyurethanes. Polymers based on alkyl methacrylates are widely used as construction materials and coatings. Polyurethanes are widely used as self-adhesives, sealants and electrical products (due to polyurethane's low glass transition temperature Tg). The aim of this work is to investigate which products can be obtained from polymethacrylates and polyurethanes.
17
Publication available in full text mode
Content available

Energy Balance Sheet of a Semi Operational Thermic System

75%
Honus S., Sassmanová V., Frantík J., Bukowski P., Juchelková D.
Chemical and Process Engineering
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2014
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issue 3
18
Publication available in full text mode
Content available

Preliminary studies on odor removal in the adsorption process on biochars produced form sewage sludge and beekeeping waste

75%
Piekarski J., Dąbrowski T., Dąbrowski J., Ignatowicz K., Piekarski J., Dąbrowski T., Dąbrowski J., Ignatowicz K.
Archives of Environmental Protection
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2021
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vol. 47
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issue 2
19
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Acetone adsorption on CO2-activated tyre pyrolysis char – Thermogravimetric analysis

75%
Kotkowski T., Cherbański R., Molga E.
Chemical and Process Engineering
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2018
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vol. 39
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issue 2
20
Publication available in full text mode
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Identification and Quantification of Gases Releasing From Furan No Bake Binder

75%
Acharya S. G., Vadher J. A., Kanjariya P. V.
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