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Scale deposits impair production reservoirs and foul down hole, surface, and injection equipment. The effects can be rapid and dramatic. One of the most frequent scale-forming compounds in water is calcium carbonate. In a reservoir the production of brine can result in the lowering of the pressure and/or temperature. A pressure drop will decrease the solubility of CaCO3 and thus increase the saturation...
As knock is one of the main factors limiting the efficiency of spark-ignition engines, the introduction of alcohol blends could help to mitigate knock concerns due to the elevated knock resistance of these blends. A model that can accurately predict their autoignition behavior would be of great value to engine designers. The current work aims to develop such a model for alcohol–gasoline blends. First,...
A Thermodynamic model that can predict the behavior of the gas sweetening process over the applicable conditions is of vital importance in industry. In this work, Extended UNIQUAC model parameters optimized for the CO 2 -MDEA-H 2 O system are presented. Different types of experimental data consisting of pure MDEA vapor pressure, vapor–liquid equilibrium (VLE) (total pressure and CO...
The low-temperature ignition of mixtures of n-heptane and air at elevated pressures (13–40bar) is addressed. A base mechanism of 272 elementary reactions among 45 species, which models the ignition time of this fuel under a wide range of conditions for initial temperatures above about 1000K is revised and augmented to produce the two-stage ignition and negative-temperature-coefficient (NTC) behavior...
Using biomass as a source of energy has been gradually increasing in last decades, because it is a sustainable and CO2 neutral fuel. In order to improve the performance of gasifiers, academic and industrial researches need to gain insights into the highly complex processes during the combustion of biomass. Even though many research has been already done in this field, the detailed mechanisms during...
The continuous production of biodiesel (fatty acid methyl esters; FAME) from chicken feather meal (CFM) was carried out in supercritical carbon dioxide (sc-CO2), in a process combining extraction of oil from CFM followed by transesterification of the CFM oil with methanol. First, extraction experiments were carried out at different pressure, temperature and solvent flow rate conditions to assess the...
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