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Tytuł:
Comparison between surface and volumetric properties of short-chain alcohols and some classical surfactants
Autorzy:
Bielawska, Magdalena
Zdziennicka, Anna
Jańczuk, Bronisław
Powiązania:
https://bibliotekanauki.pl/articles/764079.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
alcohols, surfactants, micelles, aggregates, CMC
Opis:
Measurements of the dynamic surface tension of the aqueous solutions of methanol, ethanol, propanol, CTAB and SDDS at their given concentrations were made. From the obtained results and the literature data it was concluded that the adsorption of short-chain alcohols at the water-air interface is somewhat similar to that of classical surfactants. For that reason the relationship between the Gibbs standard free energy of adsorption of short-chain alcohols and classical surfactants at that interface was established. The correlation between the chemical potential of mixing of alcohols and surfactants was also analysed. This analysis concerned the critical aggregation concentration (CAC) of alcohols and the critical micelle concentration (CMC) of surfactants. The chemical potential of surfactant mixing was calculated from the literature CMC data for the homologous series of alkyl sulfates, alkyl sulfonates, alkyl ammonium chlorides, alkyl trimethylammonium bromides, and alkyl pyridinium bromides. The influence of the hydrophobic chain length of alcohol and surfactant molecules on the Gibbs standard free energy of their adsorption at the water-air interface and their chemical potential of mixing were considered. It appeared that there is a linear dependence between these thermodynamic functions and the number of carbon atoms increased by 1 in the hydrocarbon chains of these compounds. This confirms clearly our conclusion that the behaviour of short-chain alcohols and classical surfactants at the water-air interface and in the bulk phase of aqueous solutions is similar. 
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2016, 71, 1
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frothers and gas dispersion: A review of the structure-property-function relationship
Autorzy:
Tan, Y. H.
Finch, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/109942.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
frothers
alcohols
polyglycols
frother structure
mechanisms
Opis:
Over the past 20 years quantitative measures of frother functions have been developed to try to replace such qualitative descriptors as “weak” and “strong”. One of these metrics is the critical coalescence concentration (CCC) that quantifies a frother’s ability to reduce bubble size; another is the concentration at minimum velocity (CMV) that quantifies a frother’s ability to reduce bubble rise velocity. The experimental procedure for the two measures is briefly outlined and the measures are shown to be related. Using CMV, based on more than 50 surfactants from the two main frother families, alcohols and polyglycols, the frother structure-property-function link is investigated. The structure variables were: in alcohols, alkyl chain length, and position of the methyl branch and hydroxyl group(s); and in polyglycols, alkyl chain length, and number of propylene oxide (PO) or ethylene oxide (EO) groups. On the argument that low CMV represents the desired outcome, the main findings are: the dominant effect of alkyl chain length in both alcohols and polyglycols; that for alcohols branched-chain isomers are superior to straight chain, with the best combination being OH at the terminus and the methyl branch as far away as possible; and for polyglycols, PO-based are superior to EO-based. Interpretation of these observations included the effect of structure on the following properties: surface activity, mass transfer rate, H-bonding, and molecule packing.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 1; 40-53
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detailed characterization of the substrate specificity of mouse wax synthase
Autorzy:
Miklaszewska, Magdalena
Kawiński, Adam
Banaś, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1039576.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
fatty alcohols
lipids
wax esters
acyl-CoA
Opis:
Wax synthases are membrane-associated enzymes catalysing the esterification reaction between fatty acyl-CoA and a long chain fatty alcohol. In living organisms, wax esters function as storage materials or provide protection against harmful environmental influences. In industry, they are used as ingredients for the production of lubricants, pharmaceuticals, and cosmetics. Currently the biological sources of wax esters are limited to jojoba oil. In order to establish a large-scale production of desired wax esters in transgenic high-yielding oilseed plants, enzymes involved in wax esters synthesis from different biological resources should be characterized in detail taking into consideration their substrate specificity. Therefore, this study aims at determining the substrate specificity of one of such enzymes -; the mouse wax synthase. The gene encoding this enzyme was expressed heterologously in Saccharomyces cerevisiae. In the in vitro assays (using microsomal fraction from transgenic yeast), we evaluated the preferences of mouse wax synthase towards a set of combinations of 11 acyl-CoAs with 17 fatty alcohols. The highest activity was observed for 14:0-CoA, 12:0-CoA, and 16:0-CoA in combination with medium chain alcohols (up to 5.2, 3.4, and 3.3 nmol wax esters/min/mg microsomal protein, respectively). Unsaturated alcohols longer than 18°C were better utilized by the enzyme in comparison to the saturated ones. Combinations of all tested alcohols with 20:0-CoA, 22:1-CoA, or Ric-CoA were poorly utilized by the enzyme, and conjugated acyl-CoAs were not utilized at all. Apart from the wax synthase activity, mouse wax synthase also exhibited a very low acyl-CoA:diacylglycerol acyltransferase activity. However, it displayed neither acyl-CoA:monoacylglycerol acyltransferase, nor acyl-CoA:sterol acyltransferase activity.
Źródło:
Acta Biochimica Polonica; 2013, 60, 2; 209-215
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of the energy balance of the engine powered by diesel oil mixture with butanol
Autorzy:
Sitnik, L. J.
Andrych-Zalewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/247462.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
fuels
dense alcohols
energy balance
Opis:
The development of motorisation involves using bigger amounts of fuels. These fuels are, until now, mainly petroleum. However, the fuels of bio origin must be used as well. It follows from the necessity of ensuring CO2 balance and from the fact that oil sources sooner or later will become exploited. Not less important is the fact that, principally, it is difficult to change the proportions of petrol and diesel oil extracted from crude oil, and the use of diesel oil increases proportionally faster than petrol. Therefore, it is necessary to use bio additives in diesel oil. One of such additives is dense alcohols. The aim of the present work is to determine the energy balance of diesel engine powered by diesel oil and butanol mixture. The work field includes making of energy balance of the engine in its characteristic points responsive 13 phase ESC test as well as determining on this basis the consolidated values concerning the differences in the engine energy balance. It has been proved, that powering the engine by mineral diesel oil with doped butanol (20% v/v) does not lead to essential differences in the energy balance of the engine- which does not mean, that the essential differences are absent in the particular characteristic points of the engine. It requires more detailed explanation (in the further research works) because losses in the combustion process do not show differences, but in the other balance components the differences are shown.
Źródło:
Journal of KONES; 2015, 22, 4; 269-273
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the kind and concentration of ethoxylated alcohols on the transport of citric acid through polymer inclusion membranes
Autorzy:
Dudek, M.
Przewoźna, M.
Gajewski, P.
Bogacki, M. B.
Powiązania:
https://bibliotekanauki.pl/articles/778004.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
citric acid
polymer inclusion membranes
ethoxylated alcohols
Opis:
Research into the influence of ethoxylated alcohols on the citric acid transport through polymer inclusion membranes (PIMs) has been carried out. This process may be used in the future as one of the methods of citric acid isolation. Ethoxylated alcohols, which were GENAPOL® X020, X060 and X150, served as both: plasticizer and carrier. The results showed that the maximum values of citric acid fl ux [mol/(m2.s)] were equal to: 1.02.10-4 (X020), 1.57.10-4 (X060) and 1.77.10-4 (X150). The obtained results allow proceeding further study on using the polymer inclusion membranes, as an alternative to traditional methods of citric acid separation, which are precipitation and extraction.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 4; 89-94
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Evaluation of Ultrasonic Velocity in Binary Liquid Mixtures of Alcohols [S] + Benzene
Autorzy:
Santhi, N.
Sabarathinam, P. L.
Madhumitha, J.
Alamelumangai, G.
Emayavaramban, M.
Powiązania:
https://bibliotekanauki.pl/articles/411951.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
alcohols
benzene
sound
mixtures
NR
IMR
FLT
CFT
Opis:
Ultrasonic velocities and densities of the binary liquid mixtures of benzene with 1-propanol, 2-propanol, 1-butanol, 2-butanol and 3-butanol at 303.15 to 318.15 K, over the entire composition range were measured. The theoretical values of ultrasonic velocity were evaluated using the Nomoto’s Relation (NR), Ideal Mixture Relation (IMR), Free Length Theory (FLT) and Collision Factor Theory (CFT). The validity of these relations and theories were tested by comparing the computed sound velocities with experimental values. Further, the molecular interaction parameter (á) was computed by using the experimental and the theoretical ultrasonic velocity values. The variation of this parameter with composition of the mixtures has been discussed in terms of molecular interaction in these mixtures.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 2; 18-35
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and evaluation of thermodynamic solubility of triazolo quinolone class derivatives in various solvents at 298.15-328.15 K
Autorzy:
Baluja, Shipra
Pithiya, Mona
Lava, Divyata
Powiązania:
https://bibliotekanauki.pl/articles/1031268.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Triazolo quinolone
alcohols
ethyl acetate
solubility
thermodynamic parameters
Opis:
The solubility of triazolo quinolone class derivatives in methanol, ethanol, n-propanol, n-butanol and ethyl acetate was measured using a gravimetrical method at temperature ranging from 298.15 K to 328.15 K. The results of these measurements were correlated with semi empirical equations. Some thermodynamic parameters such as dissolution enthalpy, Gibb’s free energy and entropy of mixing have also been calculated.
Źródło:
World Scientific News; 2021, 151; 16-30
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antimicrobial efficacy of mixtures of silver nanoparticles and polyhydric alcohols against health-promoting bacteria
Autorzy:
Czernel, G.
Wasko, A.
Gustaw, K.
Kaminski, D.M.
Matwijczuk, A.P.
Nowicka, A.
Matwijczuk, A.S.
Oniszczuk, T.
Arczewska, M.
Karcz, D.
Powiązania:
https://bibliotekanauki.pl/articles/2082604.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
silver nanoparticles
antimicrobial effect
healthpromoting
bacteria
polyhydric alcohols
packaging
Opis:
In the present study, the effectiveness of a mixture of silver nanoparticles with polyhydric alcohols (glycerol, erythritol, mannitol and xylitol) against six species of healthpromoting bacteria have been examined. Synthesis of silver nanoparticles was carried out using trisodium citrate as the reducing and stabilizing agent. The nanoparticles were characterized by electronic absorption, scanning electron microscopy and powder X-ray diffraction measurements. Electronic absorption spectrum revealed high uniform of synthesized nanoparticles. Practically no aggregation was observed when nanoparticles were mixed with polyhydric alcohols, suggesting weak interaction between ingredients of the mixture. Spherical silver nanoparticles, as depicted by scanning electron microscopy, were found to have diameters in the range of 10 to 30 nm; mean diameter was 18 ± 4 nm. The X-ray diffraction pattern of the prepared samples indicated the face-centred cubic crystalline structure of the metallic silver nanoparticles. In biological study, quite interesting protective effect of polyalcohols on the growth inhibition of health-promoting bacteria by silver nanoparticles was observed. The most substantial protective effect of the tested silver nanoparticles-polyalcohol mixtures was estimated for B. bifidum, L. paraplantarum, and L. phamnosus species.
Źródło:
International Agrophysics; 2019, 33, 4; 473-480
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxidation of α, Β -unsaturated alcohols by quinaldinium fluorochromate
Autorzy:
Sekar, K. G.
Periyasamy, S. K.
Powiązania:
https://bibliotekanauki.pl/articles/411715.pdf
Data publikacji:
2012
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
utlenianie
kinetyka
alfa-beta nienasycone alkohole
α-β nienasycone alkohole
QnFC
oxidation
kinetics
alpha-beta unsaturated alcohols
α-β unsaturated alcohols
quinaldinium fluorochromate
Opis:
The kinetics of oxidation of α, Β-unsaturated alcohols (allyl alcohol, Crotyl alcohol, Cinnamyl alcohol) by quinaldinium fluorochromate has been studied in aqueous acid medium at 313 K. α, Β- unsaturated alcohols were converted to the corresponding acrolein, crotonaldehyde and cinnamaldehyde. The reaction is first order each in oxidant, substrate and H+. The decrease in di electric constant of the medium increases the rate of the reaction. Increase in ionic strength by the addition of sodium perchlorate has no effect on the rate constant. There is no polymerization with acrylonitrile. The reaction has been conducted at four different temperatures and activation parameters were calculated. From the observed kinetic results a suitable mechanism consistent with rate law has been proposed. The relative reactivity order was found to be Cinnamyl alcohol > Crotyl alcohol > Allyl alcohol.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2012, 5; 8-19
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ortho-para spin conversion of Ps by paramagnetic O2 dissolved in organic compounds
Autorzy:
Zgardzińska, B.
Białko, W.
Jasińska, B.
Powiązania:
https://bibliotekanauki.pl/articles/971542.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
alcohols
cyclohexane
isooctane
n-alkanes
ortho-para conversion
paramagnetic molecule
Opis:
The o-Ps mean lifetime value in liquids decreases in the presence of the paramagnetic oxygen molecules via the ortho-para conversion process. This effect was observed for several organic samples composed of carbon and hydrogen atoms differing in the arrangement of atoms forming the molecule, e.g. n-alkanes, alcohols, branched isomer of alkane, cycloalkane. The usually observed tendency of the o-Ps lifetime value to be an increasing function of temperature (in the case of measurements performed in vacuum) changes to a decreasing one in the presence of O2 dissolved in the sample. The difference between the o-Ps lifetimes measured in samples in vacuum and in the presence of O2 increases with the distance from the melting point. The ortho-para constant rate λconv was estimated to be ~130 μs–1 at 300 K for three compounds investigated.
Źródło:
Nukleonika; 2015, 60, No. 4, part 1; 801-804
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preferential solvation of amides by methanol - a comparison of molecular dynamics calculations with the experimental data
Autorzy:
Zielkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1965827.pdf
Data publikacji:
2001
Wydawca:
Politechnika Gdańska
Tematy:
amides
alcohols
preferential solvation
Kirkwood-Buff integrals
molecular dynamics simulations
Opis:
Using the Kirkwood-Buff theory of solutions, the preferential solvation of the N-methylacet-amide (NMA), N-methylformamide, (NMF), and N,N-dimethylformamide, (DMF), molecule has been investigated in the binary {amide+methanol} mixtures at 313.15 K. Moreover, for the {amide+methanol} mixtures, where amide = NMF, DMF, and NMA, the molecular dynamics calculations at xamide=0.518 were performed. From the obtained molecule-molecule radial distribution functions, (rdf), and atom-atom rdf, it was possible to estimate the local mole fractions around the amide molecule, the orientation effects of molecules within the solvation shell, and a possibility of the formation of complexes. The general picture obtained from analysis of the molecular dynamics results is consistent with the deductions derived from thermodynamic data.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 3; 317-329
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ budowy łańcucha alkilowego na właściwości przeciwzatarciowe wodnych roztworów oksyetylenowanych alkoholi
The effect of the alkyl chain structure on the antiseizure properties of aqueous solutions of ethoxylated alcohols
Autorzy:
Sułek, M. W.
Bocho-Janiszewska, A.
Małysa, A.
Powiązania:
https://bibliotekanauki.pl/articles/188185.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
oksyetylenowane alkohole tłuszczowe
właściwości przeciwzatarciowe
zużycie
ethoxylated fatty alcohols
antiseizure properties
wear
Opis:
W artykule przedstawiono wpływ budowy łańcucha alkilowego oksyetylenowanych alkoholi tłuszczowych na właściwości przeciwzatarciowe ich wodnych roztworów. Przedmiotem badań były wodne roztwory mieszaniny dwóch alkoholi laurylowego i mirystylowego, oksyetylenowanych 7 i 10 molami tlenku etylenu oraz dwa alkohole izotridecylowe, oksyetylenowane 7 i 9 molami tlenku etylenu. Charakterystyki tribologiczne były wyrażone poprzez właściwości przeciwzatarciowe, których miarą były: obciążenie zacierające (Pt), obciążenie zatarcia (poz), graniczne obciążenie zatarcia (poz) oraz średnica skazy (d). Wykorzystano aparat czterokulowy (tester T02). Analiza wielkości charakteryzujących zatarcie wskazuje, że alkohole z rozgałęzionymi łańcuchami mają, w porównaniu z alkoholami liniowymi, zdecydowanie niższą efektywność przeciwdziałania zacieraniu. Obserwowane zmiany wielkości tribologicznych są interpretowane w kategoriach niższej trwałości filmu smarnego tworzonego przez izoalkohole z ich wodnych roztworów. Tworzony w warunkach tarcia film smarny nie jest trwały i nie zabezpiecza wystarczająco współpracujących elementów pary ciernej przed zużyciem i zatarciem. Dlatego wodne roztwory izoalkoholi w warunkach względnie niskich obciążeń nie mogą stanowić efektywnych substancji smarowych.
This paper discusses the effect of the structure of the alkyl chain of ethoxylated fatty alcohols on antiseizure properties of their aqueous solutions. The subjects of the study were aqueous solutions of a mixture of lauryl and myristyl alcohols ethoxylated with 7 and 10 moles of ethylene oxide and two isotridecyl alcohols ethoxylated with 7 and 9 moles of ethylene oxide. The tribological characteristics were expressed by antiseizure properties whose measure were scuffing load (Pt), seizure load (Poz), limiting pressure of seizure (poz), and wear scar diameter (d). A four-ball tribotester (T-02) was used in the tests. The analysis of the quantities characterising seizure indicates that, compared to linear alcohols, branched-chain alcohols are considerably less efficient in antiseizure properties. The observed changes in tribological quantities are interpreted in terms of the lower stability of the lubricant film formed by isoalcohols from their aqueous solutions. The lubricant film being formed under friction conditions is not stable and does not sufficiently protect friction pair elements against wear and seizure. Therefore, aqueous solutions of isoalcohols cannot act as efficient lubricants under relatively low load conditions.
Źródło:
Tribologia; 2012, 5; 183-190
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fotobiologiczna produkcja wodoru z mieszaniny alkoholi i lotnych kwasów tłuszczowych
Photobiological hydrogen production from mixture of alcohols and volatile fatty acids
Autorzy:
Waligórska, M.
Łaniecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/2070323.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
fotofermentacja
biowodór
kwas tłuszczowy lotny
alkohole
photofermentation
biohydrogen
volatile fatty acid
alcohols
Opis:
Zbadano wydajność wytwarzania wodoru z mieszaniny lotnych kwasów tłuszczowych z etanolem, propanolem i propano-1,3-diolem w obecności Rhodobacter sphaeroides. Substancje te nie inhibitowały wzrostu bakterii i produkcji wodoru, jednakże propano-l,3-diol nie był metabolizowany. Maksymalna ilość wodoru, 5,2 dm3/dm3, powstała w podłożu z glutaminianem sodu, a najmniejsza w obecności 10 mM jonów amonowych.
Efficiency of hydrogen production from the mixture of volatile fatty acids with ethanol, propanol and propane-l,3-diol in the presence of Rhodobacter sphaeroides was measured. These substances did not inhibit bacterial growth and hydrogen production. However, propa-ne-l,3-diol was not metabolized. The maximum amount of hydrogen (5.2 dm3/dm3) was produced in the medium with sodium glutamate, while the smallest - in the presence of ammonium ions.
Źródło:
Inżynieria i Aparatura Chemiczna; 2009, 3; 121-122
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Esterification of fatty acids with C8-C9 alcohols over selected sulfonic heterogeneous catalysts
Autorzy:
Nowicki, J.
Mosio-Mosiewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/779516.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
esterification of fatty acids
C8-C9 alcohols
sulfonic acid catalysts
Opis:
A study on the synthesis of esters of fatty acids of natural origin (oleic acid from rapeseed oil) and branched synthetic isostearic acid with commercially available alcohols C8-C9 i.e. 2-ethylhexanol (2-EH) and 3,5,5-trimethylhexanol (TMH) in the presence of selected heterogeneous catalysts containing active sulfonic groups has been made. The catalysts were obtained using ready available amorphous silicas with different textural characteristics. The influence of catalyst porosity on the catalytic properties in the esterification of fatty acids has been investigated. The effect of the synthesis temperature has also been studied. The results were compared with the results of esterification with the use of acidic ion exchange resins. It was shown that catalysts obtained on the basis of amorphous silicas are good and reusable catalysts for the esterification of fatty acids with higher alcohols.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 3; 42-47
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected aliphatic alcohols as flammable liquids and the determination of their lower explosive limits
Autorzy:
Mraèková, E.
Powiązania:
https://bibliotekanauki.pl/articles/136478.pdf
Data publikacji:
2011
Wydawca:
Szkoła Główna Służby Pożarniczej
Tematy:
explosive chamber
lower explosiveness limit
flammable liquids vapours
aliphatic alcohols
alcohol fuels
Opis:
The explosion Chamber VK 100 is introduced in the paper, in which we determined the lower explosive limits (LEL) of selected aliphatic alcohols as flammable liquids methanol, ethanol, 1-butanol. First, the calculations of the volume of flammable liquid necessary for setting of LEL were carried out. Next, the lower explosive limit of methanol, ethanol, 1-butanol was carried out experimentally. All three aliphatic alcohols (methanol, ethanol and 1-butanol) are considered as fuels.
Źródło:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2011, 42; s. 183-196
0239-5223
Pojawia się w:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
Dostawca treści:
Biblioteka Nauki
Artykuł
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