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Wyświetlanie 1-15 z 49
Tytuł:
A novel rotor design for a hybrid excited synchronous machine
Autorzy:
Paplicki, P.
Powiązania:
https://bibliotekanauki.pl/articles/141651.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
experimental result
field-weakening
finite element analysis
hybrid excitation
PM machine
rotor design
Opis:
The paper presents three novel rotor design concepts for a three-phase electric controlled permanent magnet synchronous machine (ECPMS-machine) with hybrid excitation. The influence of magnets and flux-barriers arrangement on the magnetic field distribution and field-weakening characteristics of the machine is examined, based on a three-dimensional finite element analysis (3D-FEA). Moreover, a prototype rotor design based on a new rotor concept with a good field-weakening capability is presented in detail. Finally, the experimental results of no-load back electromotive force (back-EMF) waveforms and field-weakening characteristics versus a control coil current of the machine are reported.
Źródło:
Archives of Electrical Engineering; 2017, 66, 1; 29-40
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the effect of operating parameters in column flotation using experimental design
Autorzy:
Bedekovic, G.
Powiązania:
https://bibliotekanauki.pl/articles/110943.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
froth flotation
column flotation
coal
experimental design
operating parameters
Opis:
The effect of air flow rate, pulp density and particle size was studied using central composite design for coal samples from the Lazy mine. Evaluation of column flotation tests was based on two dependant variables such as ash content and combustible matter recovery in the concentrate. The ash content in the concentrate was from 4.61 to 9.62% with the recovery of combustible matter from 17.43 to 81.98%. The ANOVA statistical analysis showed that the main effect of air flow rate has a significant impact on the combustible matter recovery and ash content in the concentrate. The main effect of pulp density on the combustible matter recovery is significant, whereas for the ash content it is not seen. There is a strong effect of the particle size on the ash content and combustible matter recovery in the concentrate. The interaction of the effect of the pulp density and particle size has a significant impact on the ash content in the concentrate.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 523-535
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Addendum no. 3 Theory of errors and statistics. Some thoughts about Gauss
Autorzy:
Sheynin, Oscar
Powiązania:
https://bibliotekanauki.pl/articles/434102.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
the theory of errors
experimental design
exploratory data analysis
Opis:
It is explained that the theory of errors is the application of the statistical method to the entire process of measuring physical magnitudes. In particular, the present- -day experimental design and exploratory data analysis can be considered as a branch of the error theory.
Źródło:
Śląski Przegląd Statystyczny; 2014, 12(18); 53-51
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced Treatment of Pre-treated Commercial Laundry Wastewater by Adsorption Process: Experimental Design and Cost Evaluation
Autorzy:
Veli, Sevil
Arslan, Ayla
Gülümser, Çisil
Topkaya, Eylem
Kurtkulak, Hatice
Zeybek, Şehriban
Dimoglo, Anatoli
İşgören, Melike
Powiązania:
https://bibliotekanauki.pl/articles/124786.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
adsorbent synthesis
COD removal
experimental design
laundry wastewater
polymer supported composites
Opis:
In Turkey, the commercial laundry wastewater is usually discharged to the receiving water bodies and its reuse potential is ignored. This wastewater is grouped into the greywater due to their content of organic and inorganic pollutants. In recent years, the sequential processes have become more preferable in greywater treatment and reuse. In this study, a batch adsorption process was applied for further treatment of commercial laundry wastewater which is also pre-treated by means of the electrocoagulation process. In adsorption, two different composites of waste hazelnut shell derived activated carbons, which are supported with polyaniline (PAn/HS) and polypyrrole (PPy/HS), were used as adsorbents. The efficiency of the process was evaluated by means of an experimental design, and the response surface methodology was applied for this purpose. In the experiment with PAn/HS, the chemical oxygen demand (COD) 75% removal efficiency was accomplished with adsorbent dosage of 0.9 g, at pH 8, with 125 rpm mixing rate and for 77.5 min reaction time. For PPy/HS under the same experimental conditions, the COD removal efficiency was obtained as 20%. The utilization of waste hazelnut shell derived composites as adsorbents for commercial laundry wastewater treatment is a good alternative. The production costs of adsorbents were estimated as 0.70 USD/g and 3.21 USD/g for PAn/HS and PPy/HS, respectively. In terms of the production cost, the PAn/HS composite is approved more agreeable as adsorbents for commercial laundry wastewater treatment.
Źródło:
Journal of Ecological Engineering; 2019, 20, 10; 165-171
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of the shortest confidence intervals for fraction in controls provided by Supreme Chamber of Control
Autorzy:
Zieliński, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/452911.pdf
Data publikacji:
2012
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
statistical quality control
alternative rating
experimental design
shortest confidence intervals for fraction
Opis:
In statistical quality control objects are alternatively rated. It is of interest to estimate a fraction of negatively rated objects. One of such applications is a quality control provided by Supreme Chamber of Control (NIK) to find out a percentage of abnormalities in the work among others of tax offices. Mathematical details of experimental designs for alternatively rated phenomena are given in Karliński (2003). Zieliński (2010b) investigated statistical properties of those experimental designs. In the paper, the application of the shortest confidence intervals for fraction in experimental designs is shown. Those intervals were proposed by Zieliński (2010a).
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2012, 13, 2; 134-138
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of central composite design for the optimization of photodestruction of a textile dye using UV/S2O82- process
Autorzy:
Khataee, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/778871.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
planowanie doświadczeń
metodologia powierzchni odpowiedzi
dekoloryzacja
experimental design
response surface methodology
decolorization
C. I. Basic Red 46
K2S2O8
Opis:
The photooxidative destruction of C. I. Basic Red 46 (BR46) by UV/S2O82- process is presented. Central Composite Design (CCD) was employed to optimize the effects of operational parameters on the photooxidative destruction efficiency. The variables investigated were the initial dye and S2O82- concentrations, reaction time and distance of the solution from UV lamp. The predicted values of the photodestruction efficiency were found to be in good agreement with the experimental values (R2 = 0.9810, Adjusted R2 = 0.9643). The results of the optimization predicted by the model showed that the maximum decolorization efficiency (>98%) was achieved at the optimum conditions of the reaction time 10 min, initial dye concentration 10 mg/l, initial peroxydisulfate concentration 1.5 mmol/l and distance of UV lamp from the solution 6 cm. The figure-of-merit electrical energy per order (EEo) was employed to estimate the electrical energy consumption and related treatment costs.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 4; 38-45
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Wood Utility Pole Climbability Using Psychophysical and Mechanical Measurements
Autorzy:
Beauchamp, Y.
Thomas, M.
Arteau, J.
Marchand, D.
Powiązania:
https://bibliotekanauki.pl/articles/90574.pdf
Data publikacji:
1999
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
experimental design
psychophysical measurements
wood pole hardness
pole climbability
projekt eksperymentalny
pomiary psychofizyczne
Opis:
The issue of climbability has been raised on several occasions for more than a decade in North America. Presently, climbability is estimated from the pole hardness measured by the Pilodyn measurements (6 J). However, the use of Pilodyn measurements to discriminate the pole hardness value is criticized by climbers, who claim that the Pilodyn hardness measurement is affected by species-treatment combinations and that it does not reflect gaff penetration or climbability. Furthermore, climbability evaluations have been conducted in which test poles were climbed by linemen, and corresponding subjective ratings were recorded. However, the ability of psychophysical measurements to accurately discriminate close hardness pole values and to differentiate species-treatment combinations at specific hardness levels have not yet been fully documented. The aim of this study is to evaluate the psychophysical perception of linemen and the mechanical measurements of gaff penetration and gaff impact during the climbing of different wood species and treatment combinations in order to compare these results with Pilodyn measurements within a precise range of pole hardnesses, to study the relationships between these variables, and, finally, to propose various design guidelines for the development of a better tool for the evaluation of climbability.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1999, 5, 1; 3-28
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania doświadczalne różnych sposobów smarowania wzdłużnych łożysk ślizgowych
Experimental study of different supply designs in hydrodynamic thrust bearings
Autorzy:
Rotta, G.
Wasilczuk, M.
Wodtke, M.
Powiązania:
https://bibliotekanauki.pl/articles/188887.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
smarowanie hydrodynamiczne
łożyska wzdłużne
systemy smarowania
badania doświadczalne
hydrodynamic lubrication
thrust bearings
supply design
experimental study
Opis:
Hydrodynamiczne łożyska wzdłużne charakteryzują się znacznymi stratami tarcia, które przyczyniają się do wzrostu temperatury łożyska i obniżenia jego nośności. Obecnie olej smarujący jest zazwyczaj chłodzony w zewnętrznych układach chłodzenia. Po schłodzeniu olej jest dostarczany z powrotem do korpusu łożyska, z reguły do przestrzeni między klockami łożyska. Skuteczność dostarczania schłodzonego oleju w pobliże wlotu do szczeliny smarowej ma wpływ na temperaturę łożyska i jego obciążalność. W pracy przedstawiono wyniki badań doświadczalnych trzech systemów dostarczania oleju na właściwości małego łożyska szybkoobrotowego.
Hydrodynamic thrust bearings have considerable power losses, and in modern designs lubricated oil is cooled in external systems. After the cooling, oil is pumped back to the bearing housing, most frequently to the space between pads. Effectiveness of supplying of cold oil to the vicinity of the inlet to the fluid film has a strong influence on bearing temperature and load capacity. In practice there is a lot of different supply methods used in thrust bearings, but there is a lack of descriptions of their efficiency in literature. In this paper some experimental results of influence of selected supplying methods on bearing characteristics have been presented.
Źródło:
Tribologia; 2010, 5; 213-221
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Configuring a sensor network for fault detection in distributed parameter systems
Autorzy:
Patan, M.
Uciński, D.
Powiązania:
https://bibliotekanauki.pl/articles/929887.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
metoda podziału i ograniczeń
ograniczony plan eksperymentu
układ o parametrach rozłożonych
detekcja uszkodzeń
estymacja parametryczna
rozmieszczanie czujników
branch-and-bound
constrained experimental design
distributed parameter system
fault detection
parameter estimation
sensor location
Opis:
The problem of fault detection in distributed parameter systems (DPSs) is formulated as that of maximizing the power of a parametric hypothesis test which checks whether or not system parameters have nominal values. A computational scheme is provided for the design of a network of observation locations in a spatial domain that are supposed to be used while detecting changes in the underlying parameters of a distributed parameter system. The setting considered relates to a situation where from among a finite set of potential sensor locations only a subset can be selected because of the cost constraints. As a suitable performance measure, the Ds-optimality criterion defined on the Fisher information matrix for the estimated parameters is applied. Then, the solution of a resulting combinatorial problem is determined based on the branch-and-bound method. As its essential part, a relaxed problem is discussed in which the sensor locations are given a priori and the aim is to determine the associated weights, which quantify the contributions of individual gauged sites. The concavity and differentiability properties of the criterion are established and a gradient projection algorithm is proposed to perform the search for the optimal solution. The delineated approach is illustrated by a numerical example on a sensor network design for a two-dimensional convective diffusion process.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2008, 18, 4; 513-524
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Construction of constrained experimental designs on finite spaces for a modified Ek-optimality criterion
Autorzy:
Uciński, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1838172.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
constrained optimum experimental design
minimal sum of largest eigenvalues
generalized simplicial decomposition
optimal measurement selection
Opis:
A simple computational algorithm is proposed for minimizing sums of largest eigenvalues of the matrix inverse over the set of all convex combinations of a finite number of nonnegative definite matrices subject to additional box constraints on the weights of those combinations. Such problems arise when experimental designs aiming at minimizing sums of largest asymptotic variances of the least-squares estimators are sought and the design region consists of finitely many support points, subject to the additional constraints that the corresponding design weights are to remain within certain limits. The underlying idea is to apply the method of outer approximations for solving the associated convex semi-infinite programming problem, which reduces to solving a sequence of finite min-max problems. A key novelty here is that solutions to the latter are found using generalized simplicial decomposition, which is a recent extension of the classical simplicial decomposition to nondifferentiable optimization. Thereby, the dimensionality of the design problem is drastically reduced. The use of the algorithm is illustrated by an example involving optimal sensor node activation in a large sensor network collecting measurements for parameter estimation of a spatiotemporal process.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2020, 30, 4; 659-677
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Construction of experimental designs by combining some GD designs
Konstrukcja eksperymentalnych układów z wykorzystaniem pewnych układów GD
Autorzy:
Brzeskwiniewicz, H.
Krzyszkowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/9667.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Katedra Zastosowań Matematyki i Informatyki
Tematy:
experimental design
group divisible block design
balanced incomplete block design
split-plot design
Źródło:
Colloquium Biometricum; 2009, 39
1896-7701
Pojawia się w:
Colloquium Biometricum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coupled fuzzy logic and experimental design application for simulation of a coal classifier in an industrial environment
Autorzy:
Khoshdast, Hamid
Soflaeian, Ali
Shojaei, Vahideh
Powiązania:
https://bibliotekanauki.pl/articles/109838.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
combined modeling
fuzzy logic
experimental design
coal classifier
industry
Opis:
Design of experiments (DOE) is an effective method providing useful information about the interaction of operating variables and the way the total system works by using statistical analyses. However, its industrial application is limited because it is almost difficult to maintain variables in DOE matrix at desired constant levels in industrial environment. Thus, this paper aims to present a new mixed modeling method which is a combination of fuzzy logic and design of experiments methods to overcome such practical limitations. The method first uses a fuzzy model which is trained by practical data gathered from industry to predict DOE response corresponding to each run in DOE matrix. Then, a statistical parametric model is constructed for the prediction of process response to any change of operating parameters under real industrial conditions. The proposed mixed method was successfully validated by using data obtained from a coal hydraulic classifier at Zarand Coal Washing Plant (Kerman, Iran). The method also seems to be a promising tool for modeling all devices and processes in real industrial environment and allows researchers to benefit from all the advantages of experimental design and fuzzy logic methods simultaneously.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 2; 504-515
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cultural-historical theory by Lev S. Vygotsy: Strategies of studies on children’s learning and development. From theory to change in practice
Kulturowo-historyczna teoria Lw S. Wygotskiego. Strategie badań rozwoju i uczenia się dzieci. Od teorii do zmiany w praktyce
Autorzy:
Filipiak, Ewa Maria
Powiązania:
https://bibliotekanauki.pl/articles/2139236.pdf
Data publikacji:
2019-01-04
Wydawca:
Wydawnictwo Naukowe Dolnośląskiej Szkoły Wyższej
Tematy:
metoda eksperymentalno-genetyczna
eksperyment nauczający (designexperiment)
myślenie teoretyczne
wczesna edukacja
kulturowo-historyczna teoria rozwoju Lwa S. Wygotskiego
CHAT
experimental and genetic method
design experiment
theoretical thinking
early education
Opis:
Lev S. Vygotsky’s cultural-historical theory of development did not only affect, in a special way, the understanding of cognitive development of an individual but it also introduced new procedures in research methodology. Procedures that allow one to uncover the potential of development residing in the maturing way of child functioning, in observing his forms of activities and engaged participation in task solution. An original “theory-method” by Vygotsky and methodological procedures connected with it – teaching experiment, genetic experiment - were applied to a research project run in the Department of Didactics and Culture of Education Studies (Developing teaching in early childhood education in line with Lev S. Vygotsky’s concepts - ACK, Narrative environment of play and learning - NEPL ). In the paper I shall focus on three problematic issues: (1) understanding of the development process and learning by Lev S. Vygotsky and under the cultural-historical approach; (2) presentation of original strategies of research on development and learning – design experiment, (3) application of these research procedures in projects recently run in the Laboratory of Educational Change – Centre for Studies on Development and Learning, a unit created at the Department of Didactics and Culture of Education of Kazimierz Wielki University in Bydgoszcz.
Kulturowo-historyczna teoria rozwoju Lwa S. Wygotskiego w sposób szczególny wpłynęła nie tylko na rozumienie procesu rozwoju poznawczego jednostki, ale także wprowadziła nowe procedury w metodologii badań. Procedury, które pozwalają odkryć potencjał rozwoju tkwiący w dojrzewającym sposobie funkcjonowania dziecka, obserwowanie jego form działalności i zaangażowanego uczestnictwa w rozwiązywaniu zadań. Oryginalną „teorio-metodę” Wygotskiego i związane z nią procedury metodologiczne: eksperyment nauczający,  eksperyment genetyczny, metodę podwójnej stymulacji, zastosowano w realizowanych w Katedrze Dydaktyki i Studiów nad Kulturą Edukacji projektach badawczych (Developing teaching in early childhood education in line with Lev S. Vygotsky ’s concepts – ACK, Narrative environment of play and learning – NEPL). W artykule skupię się na trzech wątkach problemowych: (1) rozumieniu procesu rozwoju i uczenia się według Lwa S. Wygotskiego i podejścia kulturowo-historycznego; (2) przedstawieniu oryginalnych strategii badań rozwoju i uczenia się – eksperymentu nauczającego; (3) zastosowaniu tych procedur badawczych w realizowanych ostatnio projektach w Laboratorium Zmiany Edukacyjnej – Centrum Badań nad Rozwojem i Uczeniem się, jednostce utworzonej przy Katedrze Dydaktyki i Studiów nad Kultura Edukacji UKW w Bydgoszczy.
Źródło:
Forum Oświatowe; 2018, 30, 2(60); 169-182
0867-0323
2450-3452
Pojawia się w:
Forum Oświatowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distributed scheduling of measurements in a sensor network for parameter estimation of spatio-temporal systems
Autorzy:
Patan, M.
Kowalów, D.
Powiązania:
https://bibliotekanauki.pl/articles/331122.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sensor network
distributed parameter system
parameter estimation
experimental design
sensor scheduling
sieć sensorowa
układ o parametrach rozłożonych
estymacja parametrów
projekt eksperymentalny
Opis:
The main aim of the paper is to develop a distributed algorithm for optimal node activation in a sensor network whose measurements are used for parameter estimation of the underlying distributed parameter system. Given a fixed partition of the observation horizon into a finite number of consecutive intervals, the problem under consideration is to optimize the percentage of the total number of observations spent at given sensor nodes in such a way as to maximize the accuracy of system parameter estimates. To achieve this, the determinant of the Fisher information matrix related to the covariance matrix of the parameter estimates is used as the qualitative design criterion (the so-called D-optimality). The proposed approach converts the measurement scheduling problem to a convex optimization one, in which the sensor locations are given a priori and the aim is to determine the associated weights, which quantify the contributions of individual gaged sites to the total measurement plan. Then, adopting a pairwise communication scheme, a fully distributed procedure for calculating the percentage of observations spent at given sensor locations is developed, which is a major novelty here. Another significant contribution of this work consists in derivation of necessary and sufficient conditions for the optimality of solutions. As a result, a simple and effective computational scheme is obtained which can be implemented without resorting to sophisticated numerical software. The delineated approach is illustrated by simulation examples of a sensor network design for a two-dimensional convective diffusion process.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 39-54
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of an acetonized pyrolysis oil recycled from spent-car tires on coal flotation performance
Autorzy:
Hasanizadeh, Iman
Khoshdast, Hamid
Rahmanian, Ahmad
Asgari, Kaveh
Hassanzadeh, Ahmad
Powiązania:
https://bibliotekanauki.pl/articles/24085875.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
coal flotation
acetonized pyrolysis oil
ash rejection
experimental design
interaction effect
Opis:
In this paper, an extended Historical Data (HD) design was applied for evaluating the effect of an acetonized pyrolysis oil (PO) produced by pyrolysis of spent-car tires in coal. Experimental and statistical analyses were applied for examining the influence of some operating variables such as concentration of diesel oil (0, 10, and 20 L/t), pine oil (0.55, 0.1, and 1 L/t), and the pyrolysis oil (0, 10, and 20 L/t) as well as solid content of pulp (5, 10, and 15% (w/w)) on the yield and ash content of final concentrate. Fourier Transform Infrared Spectroscopy (FTIR) measurements showed that PO contained hydroxyl, aldehyde, aliphatic, and aromatic compounds. Based on the results of Analysis of Variance (ANOVA), the main effect of all variables, except concentration of pine oil, on the flotation responses were found significant. Batch flotation experimental results indicated that using pyrolysis oil resulted in a 2% increase in ash content and a 35% decrease of the yield, through a nonlinear trend. The curved behavior of flotation measures was due to the possible competitive adsorption between PO and diesel oil and nonselective interaction between pyrolysis oil and other reagents. The negative effect of PO on coal flotation efficiency was also ascribed to the interaction between hydrophilic groups in PO structure and the oxide nature of non-combustible materials of coal particles.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 163109
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
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