Studies on CWL with glycerol for combustion process

Staroń, Anita; Kowalski, Zygmunt; Staroń, Paweł; Banach, Marcin

doi:10.1007/s11356-018-3814-0

Cited by 33 publications

(11 citation statements)

References 30 publications

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“…By-products of the textile and meat industries, such as wool, horns, hooves and feathers contain a large proportion of keratin. 1,2 Keratin is a protein that has, due to its biodegradability and biocompatibility, recently become increasingly important. 3 Wool is often used in textile industry due to its excellent mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…5 In addition to proteins, wool contains small proportion of lipids, mineral salts, nucleic acid residues and carbohydrates. 2 Keratin has an extremely high potential to be used for the development of new products in the pharmaceutical, medical, cosmetic and biotechnology industries. Keratin from wool can be used for several forms of gels, microfibres, films, sponges, bulk materials, in wound healing, drug delivery, tissue engineering and medical devices.…”

Section: Introductionmentioning

confidence: 99%

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Isolation of Keratin from Waste Wool Using Hydrothermal Processes

Verdnik

Čolnik

Knez

et al. 2021

ACSi

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The subcritical water (SubCW) extractions of waste wool to produce keratin were performed at temperatures of 150 °C to 250 °C and at different reaction times between 5 min to 75 min. The resulting proteins in the obtained products were confirmed with Fourier-transform infrared spectroscopy (FTIR). The molecular weight of the protein extracts was determined by using two different methods: with a polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulphate (SDS-PAGE) and by using a gel permeation chromatography. The results show, that by using SubCW, keratin can be isolated from waste wool in very high yields, much higher than by other chemical methods. Maximal yield was achieved at 180 °C and 60 min and it was 90.3%. The molecular weight distributions of extracted proteins, which were generated from waste wool were between 14 kDa and 4 kDa, what is comparable to the results obtained by other chemical methods.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isolation of Keratin from Waste Wool Using Hydrothermal Processes

Verdnik

Čolnik

Knez

et al. 2021

ACSi

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“…According to Polish strategic documents and forecasts, this is mainly related to energy security and other economic and social considerations. Therefore, there are many projects and analyses in Poland which focus on the reduction of the impact of coal-based electricity generation on the environment, including on the implementation of water-coal slurry [2], blue coal [3], coal gasification [4] or carbon capture and storage (CCS) technology [5] as well as reducing the emission of heavy metals like Hg [6].…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Modelling of the Impact of Coal Quality on Emissions from Energy Generation

Lelek

Kulczycka

2020

Energies

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This paper presents a model combining the LCA (Life Cycle Assessment) of fossil fuel extraction with its quality parameters and related CO2, SO2 and dust emissions at the stage of the combustion process. The model which was developed aims to identify the environmental impact of the processes of electricity production from selected energy carriers over their whole life cycle. The model takes into account the full LCA of fossil fuel extraction (of both hard and brown coal), its enrichment and fuel production as well as the environmental impact associated with emissions introduced into the air at the stage of electricity generation based on the fuels evaluated. Such an approach allows one to determine the fuel quality parameters that affect the environmental impact of energy production based on an LCA of mining and assigns the degree of environmental impact involved in particular production processes. Overall, the results obtained based on the proposed model permit the identification and prioritisation of the individual processes in the electricity generation life cycle which contribute the highest share in the general environmental impact indicator, having taken into account the modelling of the quality of the fuels used (calorific value, ash and sulphur content).

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“…Furthermore, the addition of 20% of glycerol to CWF reduces the fuel pour point to −5 C, which is important for its transportation and storage. 18 The maximum possible glycerol content in the coalwater fuel is 21%, and fuel's viscosity is up to 1.5 PaÁs. It is shown in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that if glycerol is added to CWF, an increase in fuel viscosity (from 0.455 to 1.842 Pa·s) and density (from 1.08 to 1.11 g/cm 3 ) are observed. Furthermore, the addition of 20% of glycerol to CWF reduces the fuel pour point to −5°C, which is important for its transportation and storage 18 …”

Section: Introductionmentioning

confidence: 99%

Evidence of the illegitimacy of the additive approach to the determination of the thermophysical properties of coal‐water fuel with glycerol

et al. 2020

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For the fuel ignition, the thermal conductivity and heat capacity are the key properties that determine the pre-ignition behavior of the drop of the fuel. The classic monophase fuels, such as natural gas, liquid propellants, or solid onecomponent fuels, have been investigated for a long time; and their thermophysical properties are well known in most of the cases. Composite fuels, which have recently attracted the attention of the researchers, have complex contents. In many cases, composite fuel is a mixture of solid and liquid components in the form of a slurry. Coal-water fuel and its derivatives with different additives are examples of such type fuels. For those fuels, the thermophysical properties are usually unknown. Nowadays, researchers use simple additivity theory for the calculation of the thermophysical properties of complex fuels for the first approach. Authors of this research believe that the simple additivity approach is not correct and can lead to the wrong results in the case of the numerical research of the ignition and burning processes of such a fuel. In the present research, the thermophysical properties of coalwater fuel with glycerol additives were experimentally obtained. It was found that the coefficient of thermal conductivity increases with temperature and varies in the range of 0.45 to 0.53 W/(mÁK). The heat capacity of the fuel also increases with the temperature and varies from 4.7 to 5.5 kJ/kgÁK. The higher the glycerol content, the lower the thermal conductivity and heat capacity of the composite fuel in the investigated temperature range. The results confirm the failure of the approach of the additivity law usage. Neither, thermal conductivity coefficient or heat capacity of the coal-water fuel with the addition of up to 20% glycerol complies with the additivity law. Differences between real values of the thermophysical properties and calculated ones are more than 30% No colors needed for a print copy of the manuscript.

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Studies on CWL with glycerol for combustion process

Cited by 33 publications

References 30 publications

Isolation of Keratin from Waste Wool Using Hydrothermal Processes

Isolation of Keratin from Waste Wool Using Hydrothermal Processes

Life Cycle Modelling of the Impact of Coal Quality on Emissions from Energy Generation

Evidence of the illegitimacy of the additive approach to the determination of the thermophysical properties of coal‐water fuel with glycerol

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