The combined occurrence of polymers, surfactants and alkali has been an intense area of study for... more The combined occurrence of polymers, surfactants and alkali has been an intense area of study for many years and has long been recognized to be important in influencing the properties of mixed systems. In this work, we further examine the effect of two anionic surfactants sodium dodecyl sulfate (SDS) and Marlon ARL (MARL) on solutions containing a biopolymer (Xanthan gum) and alkaline (NaOH) by conductivity and interfacial tension (IFT) measurements. Since alkali/surfactant/polymer (ASP) flooding is one of the most promising enhanced oil recovery (EOR) method and oil/water interfacial tension is one of the most important parameters for chemical EOR, we have applied the optimum ASP (A = 0.7; MARL = 2; P = 0.2) % w/w concentrations to an Algerian crude oil. The results of the measurements showed that the mixure of different compounds has an important effect on the conductivity and interfacial tension, The results also indicate that the synergetic action of the two surfactants SDS and MARL, greatly influenced the conductivity and the interfacial tension of these systems and the crude oil/water system.
The amorphous aluminosilicates formed at the beginning of the hydrothermal synthesis of mordenite... more The amorphous aluminosilicates formed at the beginning of the hydrothermal synthesis of mordenite present a zeolite-like microporosity. The disorder of the aluminosilicate framework is witnessed by the absence of structural bands in IR spectra, the width of the 29 Si MAS-NMR signals and the broad X-ray diffraction patterns. The microporosity of the hydrothermal gels can be easily overlooked as it completely collapses under evaporative drying. Aerogels formed by CO 2 supercritical drying retains the structure of the parent gel and allows the microporosity to be detected and characterised.
Summary: Zeolite-chitosan composites have been prepared by encapsulation of zeolites by a gelling... more Summary: Zeolite-chitosan composites have been prepared by encapsulation of zeolites by a gelling solution of chitosan or by in-situ synthesis of zeolites inside a chitosan gel. The preparation of the composite implies modifications of both components. Zeolites are dealuminated by the acid solution in which chitosan is dissolved and the morphology of the chitosan fibrils is stabilized by iniorganic species issued from the dealumination of the zeolites or from their synthesis medium. Zeolite-bearing chitosan xerogels present surface area and porosity similar to the textural properties of chitosan aerogels.
The combined occurrence of polymers, surfactants and alkali has been an intense area of study for... more The combined occurrence of polymers, surfactants and alkali has been an intense area of study for many years and has long been recognized to be important in influencing the properties of mixed systems. In this work, we further examine the effect of two anionic surfactants sodium dodecyl sulfate (SDS) and Marlon ARL (MARL) on solutions containing a biopolymer (Xanthan gum) and alkaline (NaOH) by conductivity and interfacial tension (IFT) measurements. Since alkali/surfactant/polymer (ASP) flooding is one of the most promising enhanced oil recovery (EOR) method and oil/water interfacial tension is one of the most important parameters for chemical EOR, we have applied the optimum ASP (A = 0.7; MARL = 2; P = 0.2) % w/w concentrations to an Algerian crude oil. The results of the measurements showed that the mixure of different compounds has an important effect on the conductivity and interfacial tension, The results also indicate that the synergetic action of the two surfactants SDS and MARL, greatly influenced the conductivity and the interfacial tension of these systems and the crude oil/water system.
The amorphous aluminosilicates formed at the beginning of the hydrothermal synthesis of mordenite... more The amorphous aluminosilicates formed at the beginning of the hydrothermal synthesis of mordenite present a zeolite-like microporosity. The disorder of the aluminosilicate framework is witnessed by the absence of structural bands in IR spectra, the width of the 29 Si MAS-NMR signals and the broad X-ray diffraction patterns. The microporosity of the hydrothermal gels can be easily overlooked as it completely collapses under evaporative drying. Aerogels formed by CO 2 supercritical drying retains the structure of the parent gel and allows the microporosity to be detected and characterised.
Summary: Zeolite-chitosan composites have been prepared by encapsulation of zeolites by a gelling... more Summary: Zeolite-chitosan composites have been prepared by encapsulation of zeolites by a gelling solution of chitosan or by in-situ synthesis of zeolites inside a chitosan gel. The preparation of the composite implies modifications of both components. Zeolites are dealuminated by the acid solution in which chitosan is dissolved and the morphology of the chitosan fibrils is stabilized by iniorganic species issued from the dealumination of the zeolites or from their synthesis medium. Zeolite-bearing chitosan xerogels present surface area and porosity similar to the textural properties of chitosan aerogels.
Uploads
Papers by Amine. Morsli