TITLE

Surface and bulk phase behavior of dry and hydrated tetradecanol:octadecanol alcohol mixtures

AUTHOR(S)
Sloutskin, E.; Sirota, E. B.; Kraack, H.; Gang, O.; Doerr, A.; Ocko, B. M.; Deutsch, M.
PUB. DATE
May 2002
SOURCE
Journal of Chemical Physics;5/8/2002, Vol. 116 Issue 18, p8056
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Surface freezing was studied in dry and hydrated octadecanol:tetradecanol (C[sub 18]OH:C[sub 14]OH) mixtures, using surface tension and synchrotron x-ray surface diffraction techniques. Even small amounts of admixed C[sub 18]OH were found to induce surface freezing in C[sub 14]OH which does not exhibit this effect when pure. The phase diagram of the bulk was measured by calorimetry and bulk x-ray diffraction. Upon increasing the bulk mole fraction of C[sub 18]OH (φ) a sharp increase in the bulk supercooling occurs at φ ≈ 0.4 in dry mixtures, while no supercooling was observed for the hydrated mixtures. A simple thermodynamical model based on the theory of s-regular mixtures is shown to account well for the dependence of the surface freezing onset temperature of both dry and hydrated mixtures, and the hydrated bulk's freezing temperature on φ. Only a phenomenological description exists for the dry bulk's phase diagram. This study is expected to provide a baseline for the general surface and bulk behavior of long-chain alcohol mixtures.
ACCESSION #
6554331

 

Related Articles

  • Continuous Production of Ethanol from Starch Using Glucoamylase and Yeast Co-Immobilized in Pectin Gel. Raquel Giordano; Joubert Trovati; Willibaldo Schmidell // Applied Biochemistry & Biotechnology;Mar2008, Vol. 147 Issue 1-3, p47 

    Abstract  This work presents a continuous simultaneous saccharification and fermentation (SSF) process to produce ethanol from starch using glucoamylase and Saccharomyces cerevisiae co-immobilized in pectin gel. The enzyme was immobilized on macroporous silica, after silanization and...

  • Ethanol Production from Wet-Exploded Wheat Straw Hydrolysate by Thermophilic Anaerobic Bacterium Thermoanaerobacter BG1L1 in a Continuous Immobilized Reactor. Tania Georgieva; Birgitte Ahring // Applied Biochemistry & Biotechnology;Mar2008, Vol. 145 Issue 1-3, p99 

    Abstract  Thermophilic ethanol fermentation of wet-exploded wheat straw hydrolysate was investigated in a continuous immobilized reactor system. The experiments were carried out in a lab-scale fluidized bed reactor (FBR) at 70°C. Undetoxified wheat straw hydrolysate was used...

  • Quantitative Structure-Property Relationship: XIII. Properties of Aliphatic Alcohols. Golovanov, I. B.; Zhenodarova, S. M.; Smolyaninova, O. A. // Russian Journal of General Chemistry;Apr2003, Vol. 73 Issue 4, p519 

    A simple quantitative structure-property relationship was used to calculate a set of properties of aliphatic alcohols including the boiling point; enthalpy of vaporization; heat capacity of liquids at constant pressure; entropy, enthalpy, and free energy of formation; free energy of transfer...

  • MWCNT-Supported Ni—Mo—K Catalyst for Higher Alcohol Synthesis from Syngas. Chun-Hui Ma; Hai-Yan Li; Guo-Dong Lin; Hong-Bin Zhang // Catalysis Letters;Jul2010, Vol. 137 Issue 3/4, p171 

    A type of novel MWCNT-supported Ni–Mo–K catalysts for higher alcohol synthesis (HAS) from syngas was developed, which displayed excellent performance for the selective formation of C1–3-alcohols and DME from syngas. Over the 15%Ni1Mo1K0.05/CNTs catalyst under the reaction...

  • Flow development at the surfaces of bubbles and droplets in gradient solutions of a surfase-active liquid. Bushueva, K.; Denisova, M.; Zuev, A.; Kostarev, K. // Colloid Journal;Jul2008, Vol. 70 Issue 4, p416 

    The development of solutocapillary flows at the surfaces of air bubbles and chlorobenzene droplets was experimentally studied in nonuniform aqueous solutions of ethanol and isopropanol, which have a low surface tension and, hence, exhibit surface-active properties with respect to water. The...

  • Investigation of the polyvinyl alcohol stabilization mechanism and adsorption properties on the surface of ternary mixed nanooxide AST 50 (AlO-SiO-TiO). Wiśniewska, Małgorzata; Ostolska, Iwona; Szewczuk-Karpisz, Katarzyna; Chibowski, Stanisław; Terpiłowski, Konrad; Gun'ko, Vladimir; Zarko, Vladimir // Journal of Nanoparticle Research;Jan2015, Vol. 17 Issue 1, p1 

    A new adsorbent consisting of fumed, mixed alumina, silica, and titania in various proportions (AST 50) was investigated. The studied material was prepared by chemical vapor deposition method. The diameter of AST 50 primary particles was equal to about 51 nm which denotes that it can be...

  • Palladium(II, I, 0) Complexes in Catalytic Reactions of Oxidative Carbonylation. Temkin, O. N.; Bruk, L. G. // Kinetics & Catalysis;Sep2003, Vol. 44 Issue 5, p601 

    The mechanisms of carbonylation of alkenes, alkynes, and alcohols, including the mechanism of oxidative carbonylation of alkynes in the regime of self-oscillations catalyzed by Pd(II), Pd(I), or Pd(0) complexes, are analyzed. It is shown that the main reasons for the appearance of...

  • Vitamin B as a metal-free organocatalyst for greener Paal-Knorr pyrrole synthesis. Darabi, Hossein; Aghapoor, Kioumars; Darestani Farahani, Abbas; Mohsenzadeh, Farshid // Environmental Chemistry Letters;Dec2012, Vol. 10 Issue 4, p369 

    This investigation discloses a greener reaction to prepare pyrrole derivatives. Metal-free catalysts are greener alternatives to existing metal catalysts in synthetic organic chemistry. Indeed, transition metals are often costly and toxic. They may be found as traces in health reaction products...

  • Non-Enzymatic Interaction of Reaction Products and Substrates in Peroxidase Catalysis. Hushpulian, D. M.; Fechina, V. A.; Kazakov, S. V.; Sakharov, I. Yu.; Gazaryan, I. G. // Biochemistry (00062979);Sep2003, Vol. 68 Issue 9, p1006 

    A quantitative approach for estimation of the non-enzymatic interaction between ammonium 2,2"-azino-bis(3-ethylbenzthiazoline-6-sulfonate) (ABTS) oxidation product and a poorly oxidized substrate was developed using a system including tobacco peroxidase, a mediator substrate (ABTS), and a second...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics