Maria Jorge Pratas

Maria Jorge Pratas
University of Aveiro | UA · CICECO - Centre for Research in Ceramics and Composite Materials

PhD

About

15
Publications
18,563
Reads
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1,245
Citations
Citations since 2017
0 Research Items
594 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Additional affiliations
June 2018 - May 2019
University of Aveiro
Position
  • PostDoc Position
June 2007 - September 2011
University of Aveiro
Position
  • PhD
Description
  • Thesis: Biodiesel Formulation
September 2004 - May 2007
University of Aveiro
Position
  • Master’s Degree
Description
  • Thesis: Measuring Solubility of gases in Ionic Liquids using a crystal quartz microbalance

Publications

Publications (15)
Article
Density is an important biodiesel parameter, with impact on fuel quality. Predicting density is of high relevance for a correct formulation of an adequate blend of raw materials that optimize the cost of biodiesel fuel production while allowing the produced fuel to meet the required quality standards. The aim of this work is to present new density...
Article
To develop reliable models for the densities and viscosities of biodiesel fuel, reliable data for the pure fatty acid esters are required. Densities and viscosities were measured for seven ethyl esters and eight methyl esters, at atmospheric pressure and temperatures from (273.15 to 363.15) K. A critical assessment of the measured data against the...
Article
Data for the mutual solubilities of fatty acid + water mixtures are scarce and so measurements for seven fatty acid (C5-C10, C12) + water systems were carried out. This new experimental data was successfully modelled with the cubic plus association EoS. Using data from C6 to C10 and the Elliot's cross-associating combining rule a correlation for th...
Article
Surface tension is one of the key properties that directly affects fuel atomization. A large value of this property makes the formation of small droplets difficult, hampering the correct fuel atomization on the engine combustion chamber. Despite its importance, there are very few data on the surface tension of biodiesels or fatty acid esters from w...
Article
Density is one of the most important biodiesel properties, because engine injection systems (pumps and injectors) must deliver an amount of fuel precisely adjusted to provide a proper combustion while minimizing greenhouse gas emissions. The pressure influence in fuel density has become particularly important with the increased use of modern common...
Article
The solubility of ionic liquids (ILs) in water is of significant relevance for both process design and evaluation of their environmental impact. In this work, the solubilities of the non-aromatic piperidinium- and pyrrolidinium-based ILs in water, combined with the anion bis(trifluoromethylsulfonyl)imide, were determined in the temperature range fr...
Article
The solubility of adamantane was measured in eight phosphonium-based ionic liquids (ILs) having cations with different alkyl chain lengths, namely, tributyl(methyl)phosphonium, triisobutyl(methyl)phosphonium, tetraoctylphosphonium, and tetradecyltrihexylphosphonium, combined with several anions, namely, bromide, chloride, dicyanamide, methanesulfon...
Article
The aim of this work is to establish a comparison between the solubility of the hydrochloride and non-hydrochloride forms of ciprofloxacin and tetracycline in relevant solvents. For that purpose the solubilities of the non-hydrochloride forms of ciprofloxacin and tetracycline were measured in water, ethanol, 2-propanol, and acetone, in the temperat...
Article
The solubilities of tetracycline hydrochloride, moxifloxacin hydrochloride, and ciprofloxacin hydrochloride were measured in several solvents, such as water, ethanol, 2-propanol, and acetone, in the temperature range of 293.15-323.15 K for ciprofloxacin.HCl and moxifloxacin.HCl and 288.15-310.15 K for tetracycline. All the antibiotics have the same...
Article
Despite the structural similarity between perfluoroalkanes (PFCs) and alkanes (HCs), mixtures containing these two classes of compounds present large deviations from Raoult's law and extended immiscibility regions. The study of these mixtures is of great interest for both practical applications and testing or improving theories of mixtures as well...
Article
Full-text available
Perfluoroalkanes have been investigated in recent years due to the great importance they have either in biomedical or in industrial applications. After the M ontreal Protocol perfluoroalkanes and their mixtures were proposed as alternative environmentally friendly refrigerants, fire extinguishers, foam blowing agents and solvents. More recently, th...

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