Browsing by Author "Tazerout, Mohand"

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Bio-oil recovery from olive mill wastewater in sub-/supercritical alcohol-water system
(Elsevier, 2019) Hadhoum, Loubna; Burnens, Gaëtan; Loubar, Khaled; Balistrou, Mourad; Tazerout, Mohand
Catalytic effects of eggshell ash on the conversion of used engine oil to fuel by pyrolysis
(Taylor and Francis, 2022) Zerdane, Youghourta; Largeau, Jean François; Hachemi, Madjid; Tazerout, Mohand
The objective of this work is to recycle used engine oil until it is converted into an alterna- tive fuel by catalytic pyrolysis. The effect of using eggshell ash as a catalyst in pyrolysis reac- tions on the yield of the resulting fractions was investigated. In addition, the influence of this catalyst on the compositions and the quality of the non-condensable gas and liquid fractions were analyzed. The results show that the liquid fraction recovered 97.02%wt; with 20%wt of the catalyst is predominant. The detection of aromatics 15.84%wt, olefins 32.74%wt, naphthenic 2.82%wt, paraffins 29.00%wt, and alcohols 20.50%wt, in the pyrolytic liquid and the observation of H2 15.22%wt, CH4 16.65%wt and other elements such as C4H8 21.93%wt in non-condensable gases, make it possible to predict the good usability of these products obtained as an alternative fuel.
Effect of natural gas enrichment with hydrogen on combustion characteristics of a dual fuel diesel engine
(Elsevier, 2019) Ouchikh, Sarah; Lounici, Mohand Said; Tarabet, Lyes; Loubar, K.; Tazerout, Mohand
Elaboration et caractérisation de couches minces de TiCN réalisées par pulvérisation magnétron RF
(2011) Tazerout, Mohand
L’étude des couches minces connait un essor considérable, aussi bien dans les approches théorique que dans les techniques expérimentales. L’industrie, par ses divers domaines, est la plus exigeante de la technologie des dépôts et des revêtements, ainsi, grâce au développement de nouveaux procédés d’élaboration de couches minces, on est arrivé à mettre au point des matériaux possédant des propriétés désirées. Des études ont été réalisées sur le composé TiCN et des résultats surprenant ont été obtenus sur les propriétés de ces couches. Plusieurs techniques sont utilisées pour déposer les couches minces de TiCxNy, parmi elles les techniques de dépôts chimiques en phases vapeur (CVD), qui travaillent en moyenne et hautes températures. L’avantage d’utiliser les techniques de dépôts physique en phase vapeur (PVD) réside dans le fait de travailler à des températures plus basses. De plus c’est une technique qui respecte l’environnement. Dans notre cas nous avons utilisé une des techniques PVD, à savoir la pulvérisation cathodique en faisant varier la pression totale, la puissance de la décharge, la composition du mélange gazeux et le temps de dépôts. L’objectif de notre travail, est l’étude de l’effet des conditions expérimentales sur les propriétés mécaniques, optiques et électriques des couches minces de carbonitrure de titane (TiCN) déposées par pulvérisation cathodique magnétron RF (13,56 MHz)
Eucalyptus biodiesel as an alternative to diesel fuel : preparation and tests on DI diesel engine
(2012) Tarabet, Lyes; Loubar, Khaled; Lounici, Mohand Said; Hanchi, Samir; Tazerout, Mohand
Experimental assessment of performance and emissions maps for biodiesel fueled compression ignition engine
(Elsevier, 2016) Kezrane, Cheikh; Awad, Sary; Loubar, Khaled; Liazid, Abdelkrim; Tazerout, Mohand
Experimental investigation on NG dual fuel engine improvement by hydrogen enrichment
(Elsevier, 2014) Lounici, Mohand Said; Boussadi, Asma; Loubar, Khaled; Tazerout, Mohand
Experimental investigation on petroleum sludge valorization into fuel via pyrolysis process
(Springer Science and Business Media B.V., 2017) Bellahcene, Amal; Hachemi, Madjid; Largeau, Jean-François; Tarabet, Lyes; Burnens, Gaëtan; Khiari, Karim; Tazerout, Mohand
Oil sludge (OS) has been of key concern due to its continuing effect on the environment degradation. The huge quantities thrown yearly of this waste contain a high proportion of hydrocarbons which are valuable for recovery. This study focused on the oil sludge conversion into a fuel for a diesel engine by thermal/catalytic pyrolysis process. The experiments were conducted at atmospheric pressure in a batch reactor operated without and with two catalyst types: TiO2 (3 and 5 wt%) and Al2O3(3 and 5 wt%). Overall all test conditions followed in the OS pyrolysis, a considerable liquid fraction is recovered (around 70%), as compared to the gaseous fraction (around 25%) and the solid residue (around 5%). The characterization of the pyrolytic oil samples, containing approximately 11.70% of oxygen, showed also that the use of 5% of Al2O3 catalyst in the OS cracking provide the best fuel quality with a minimum viscosity value (3.5 mm2/s), a maximum heating value (45.72 MJ/kg) with a hydrocarbon compounds in the range (C7–C32) which are detailed by GC–MS analysis. The others properties (density, flash point, pour point and cloud point) are found to be close to those of diesel fuel. Also, the catalysts effect is studied on the others pyrolysis products. The obtained results allow to predict the good usability as a diesel like fuel. Further tests to control engine performance and pollutant emissions could be done Graphic Abstract
Hydrothermal liquefaction of oil mill wastewater for bio-oil production in subcritical conditions
(Elsevier, 2016) Hadhoum, Loubna; Balistrou, Mourad; Burnens, Gaëtan; Loubar, Khaled; Tazerout, Mohand
Investigation of natural gas enrichment with high hydrogen participation in dual fuel diesel engine
(Elsevier, 2021) Benbellil, Messaoud Abdelalli; Lounici, Mohand Said; Loubar, Khaled; Tazerout, Mohand
This study explores the impact of natural gas (NG) enrichment with high H2 concentrations (20, 30, 40 and 50 by v %) on combustion characteristics, engine performance, exhaust emissions and knock in a compression ignition engine running in dual fuel (DF) mode. Results indicated that H2 addition to NG contributes to enhance gaseous fuel combustion that corresponds to an increased heat release rate (HRR) during the premixed phase of gaseous fuel that also causes an increase in the pressure peak, particularly at high loads. The maximum pressure peak and HRR correspond to 50% H2 addition. The combustion duration is shortened for all H2 mixtures. Regarding engine performance, an important benefit in terms of brake thermal efficiency is noted for all H2 blends; it increases with increasing enrichment rate and reaches approximately 16% increase for the 50% H2 mixture relative to pure NG case. Moreover, enriching NG with H2 is an effective solution for reducing unburned hydrocarbons and carbon monoxide at moderate to high engine loads. However, for NOx emissions, the addition of H2 to NG is only attractive at low and moderate loads. In addition, over 80% engine load, NG enrichment with H2 generates knock, which rapidly reaches high intensities.
Investigation on heat transfer evaluation for a more efficient two-zone combustion model in the case of natural gas SI engines
(Elsevier, 2011) Lounici, Mohand Said; Loubar, Khaled; Balistrou, Mourad; Tazerout, Mohand
Two-zone model is one of the most interesting engine simulation tools, especially for SI engines. However, the pertinence of the simulation depends on the accuracy of the heat transfer model. In fact, an important part of the fuel energy is transformed to heat loss from the chamber walls. Also, knock appearance is closely related to heat exchange. However, in the previous studies using two-zone models, many choices are made for heat transfer evaluation and no choice influence study has been carried out, in the literature. The current study aims to investigate the effect of the choice of both the heat transfer correlation and burned zone heat transfer area calculation method and provide an optimized choice for a more efficient two-zone thermodynamic model, in the case of natural gas SI engines. For this purpose, a computer simulation is developed. Experimental measurements are carried out for comparison and validation. The effect of correlation choice has been first studied. The most known correlations have been tested and compared. Our experimental pressure results, supported for more general and reliable conclusions, by a literature survey of many other studies, based on measured heat transfer rates for several SI engines, are used for correlation selection. It is found that Hohenberg’s correlation is the best choice. However, the influence of the burned zone heat transfer area calculation method is negligible
Investigationof pilot injection strategy effect on performance and emissions ofdual-fuel engine
(Toronto Metropolitan University, 2023) Ouchikh, Sarah; Lounici, Mohand Said; Loubar, Khaled; Tazerout, Mohand
The dual-fuel combustion is a promising technique for methane utilization in internal combustion. This mode has the potential to reduce emissions of nitrogen oxides and particulate matter. However, this mode presents some deficits at low loads, especially concerning unburned hydrocarbons and carbon monoxide emissions. In the current study, experimental research was conducted to investigate the effect of diesel injection strategy, including single and split injections, on the performance and emissions of a methane/diesel dual-fuel engine.
Knock characterization and development of a new knock indicator for dual-fuel engines
(Elsevier, 2017) Lounici, Mohand Said; Benbellil, Messaoud Abdelalli; Loubar, K.; Niculescu, D.C.; Tazerout, Mohand
Dual-fuel mode is a promising technique for natural gas utilization in internal combustion engines. However, for high loads operation, the engine risks to go through a hazardous knocking regime. Knock phenomenon is an abnormal combustion that can cause some disagreeable effects in engines where it occurs. It can even induce brutal irreparable engine damage under severe knocking conditions. The present paper aims first to highlight and characterize knock in dual-fuel engines fueled with natural gas as main fuel and diesel as pilot fuel. Description of this phenomenon is investigated in this type of engines. Knock behavior in dual-fuel engine is compared to spark ignition engine case. Cyclical variability of this phenomenon is studied. A new knock indicator, based on in-cylinder pressure analysis, is proposed in order to identify and evaluate knock in dual-fuel engines. In addition, knock effects on heat release, cylinder wall temperature and engine performance and emissions are examined. New techniques to delay knock appearance in this type of engines are investigated. It is found that the increase in pilot fuel quantity is an effective technique to delay knock onset in NG dual-fuel engines
Towards improvement of natural gas-diesel dual fuel mode : an experimental investigation on performance and exhaust emissions
(Elsevier, 2014) Lounici, Mohand Said; Loubar, Khaled; Tarabet, Lyes; Balistrou, Mourad; Niculescu, Dan-Catalin; Tazerout, Mohand