Kinetic study of biodiesel production using choline hydroxide as catalyst

The present work aims to study the use of choline hydroxide (ChOH) ionic liquid (IL) as a potentially reusable catalyst for the production of biodiesel. A kinetic study was carried out for the transesterification of a previously characterized vegetable oil sample with methanol, under the following fraction conditions: 2 wt.% catalyst dosage, 1:10 oil/methanol molar ratio, reaction time of 10, 20, 30, 45, 60 and 120 minutes, and reaction temperature values of 35 45 55 and 65ºC. The transesterification reaction with ChOH provided a 95.7% conversion value, expressed in FAME content, using a time reaction of 30 min and a temperature reaction of 65ºC. The experimental kinetic study results demonstrated that a first order model represents for all the studied temperatures, the model that best fits the experimental results. The reaction rate constant was estimated as 0.1182 min-1 for 65ºC and an activation energy of 13.64 kJ/molinfo:eu-repo/semantics/publishedVersio

Competitive adsorption of Cu (II) and Zn (II) on impregnate raw Algerian bentonite and efficiency of extraction

International audienc

Kinetic study of biodiesel production using choline hydroxide as catalyst

Due to the finite stock of fossil fuels and its negative impact on the environment, many countries across the world are now learning toward renewable sources energies like solar energy, wind energy, biofuel, hydropower, geothermal and ocean energy to ensure energy for the society development security.info:eu-repo/semantics/publishedVersio

The synthesis of MCM-41 nanomaterial from Algerian Bentonite: The effect of the mineral phase contents of clay on the structure properties of MCM-41

International audienceThis study focuses on the MCM-41 material (Mobil Composition of Matter). The MCM-41 nanomaterial presents higher physical properties such as pore sizes, surface areas and pore volumes. This material is usually synthesized by using laboratory reagents as silicate sources and aluminium source. These laboratory reagents are still expensive and toxic for large scale production. The main aim of this work is to resolve this problem and to replace these expensive laboratory reagents by more cost effective ones. The volclay and Algerian bentonite low-cost mass clay materials are used as silicate and acuminate sources separately by adopting an alkaline fusion process to extract both silicon and aluminium (1 kg of silicium and aluminium from volclay and Algerian bentonite cost around 0.03 and 0.01 (sic) whereas the same amount of silicon from ludox and aluminium from sodium aluminates cost around 350 (sic)). The synthesis of MCM-41 from bentonite was carried out by the hydrothermal method using the supernatants of bentonite (in the form of sodium silicate and sodium aluminate). On the basis of the data obtained from powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and N-2 adsorption and desorption, the results revealed that the properties of MCM-41 synthesized from Algerian bentonite and volclay separately depend on both elemental composition and mineral phase contents of the used bentonite. Pure and highly ordered hexagonal mesoporous MCM-41 with uniform pore sizes and a high specific surface area have been successfully synthesized without any phases which exist in natural bentonite. The Algerian bentonite was chosen because of its low cost compared to volclay, another commercial clay source. (C) 2013 Published by Elsevier Masson SAS on behalf of Academie des sciences