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Methane conversion using a dielectric barrier discharge reactor at atmospheric pressure for hydrogen production

Plasma Science and Technology 2017年第9期19卷 81-90页

作者： N KHADIR K KHODJA a belasri Laboratoire de Physique des Plasmas Mat6riaux Conducteurs et leurs ApplicationsUniversite d'Oran desSciences et de la Technologie USTO-MBFaculte de PhysiqueOran 31000Algeria Unite de Recherche Appliqu6e en Energies Renouvelables URAERCentre de Developpement desEnergies RenouvelablesCDER47133GhardaiaAlgeria

In the present paper, we carried out a theoretical study of dielectric barrier discharge（DBD）filled with pure methane gas. The homogeneous discharge model used in this work includes a plasma chemistry unit, an electrical circuit, and the Boltzmann equation. The model was applied to the case of a sinusoidal voltage at a period frequency of 50 kHz and under a gas pressure of 600 Torr. We investigated the temporal variation of electrical and kinetic discharge parameters such as plasma and dielectric voltages, the discharge current density, electric field, deposited power density, and the species concentration. We also checked the physical model validity by comparing its results with experimental work. According to the results discussed herein, the dielectric capacitance is the parameter that has the greatest effect on the methane conversion and H_2/CH_4 ratio. This work enriches the knowledge for the improvement of DBD for CH_4 conversion and hydrogen production.

关键词： dielectric capacitance checked methane validity herein filled figure hydrocarbons reforming

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Numerical investigation of Ar–NH3 mixture in homogenous DBDs

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Plasma Science and Technology 2018年第3期20卷 72-77页

作者： Barkahoum LAROUCI Soumia BENDELLA Ahmed belasri Laboratoire de Physique des Plasmas Materiaux Conducteurs et leurs Applications Faculte de PhysiqueUniversite des Sciences et de la Technologie d'Oran Mohamed Boudiaf USTO-MB El M'Naoeur B.P.1505 31 000 Oran Algeria

In this paper, a study of homogenous dielectric barrier discharge Ar–NHwas made in order to investigate the electrical and the physical characteristics of homogenous discharge at atmospheric pressure. The discharge model includes the electrical module and the chemical kinetic module. The results obtained by the present model were compared with experimental work. The evolution of the plasmas voltage, the species densities, and the concentration of charged species are analyzed and discussed.

关键词： plasma simulation dielectric barrier discharge Ar-NH3 mixture

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A Simplified Numerical Study of the Kr/Cl_2 Plasma Chemistry in Dielectric Barrier Discharge

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Plasma Science and Technology 2013年第4期15卷 343-349页

作者： N.LARBI DAHO BACHIR A.belasri Laboratoire de physique des plasmas mat'eriaux conducteurs et leurs applications LPPMCA Universit'e USTO'MBOran Algeria

In this paper, the generation of excimers and exciplexe radiation in mixtures of rare gas with halogen by homogeneous dielectric barrier discharge （DBD） is investigated. The typical characteristics of an excilamp based on KrCI＊ exciplexe molecules and the kinetic processes for the formation and the decay of this molecules in the Kr/Cl2 mixture are studied. The computer model developed is based on the Kr/Cl2 mixture chemistry, the equivalent electric circuit and the Boltzmann equations. The importance in the kinetic processes of some species such as the metastable state of Krypton （Kr＊（3P0,2）） and the negative ion of chloride （C1-） is considered. The results illustrate the time variations of charged species （ne, Kr＋, CI-, Cl＋, Cl＋, Kr＋）, excited atoms and molecules （Kr＊（3p0,2）, Kr＊（3P1）, Cl＊, Cl2）, the excimers （Kr, KrCl＊（B）, KrCI＊（C）, Kr2Cl＊） and the UV photon concentrations （in 222 nm, 235 nm, 258 nm and 325 nm range）. The effects of chlorine concentration and the total gas pressure in the Kr-Cl2 discharge on the electric parameters and radiation emissions are investigated.

关键词： rare gas kinetic homogenous discharge dielectric barrier discharge KrCl*excilamp

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Estimation of Soil Erosion Risk Using the Universal Soil Loss Equation (USLE) and Geo-Information Technology in Oued El Makhazine Watershed, Morocco

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Journal of Geographic Information System 2016年第1期8卷 98-107页

作者： Asma belasri Abdellah Lakhouili Faculty of Science and Technology Hassan 1 University Settat Morocco

Soil erosion by water is one of the major threats to soils in the north of Morocco;soil erosion not only decreases agricultural productivity, but also reduces the water availability. In the current study, Oued El Makhazine watershed is selected to estimate annual soil loss using the Universal Soil Loss Equation (USLE), remote sensing (RS) and geographic information system (GIS). GIS data layers including, rainfall erosivity (R), soil erodibility (K), slope length and steepness (LS), cover management (C) and conservation practice (P) factors are computed to determine their effects on average annual soil loss in the area. The resultant map of annual soil erosion shows a maximum soil loss of 735 t·h-1·y-1, about 65.25% (1575 km2), of the watershed ranges between 0 and 95 t·h-1·y-1. Higher soil losses are observed at higher LS factor area. The spatial erosion maps generate with USLE method, remote sensing and GIS can serve as effective inputs in deriving strategies for land planning and management in the environmentally sensitive mountainous areas.

关键词： Oued El Makhazine Watershed Erosion USLE Geographic Information System

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Influence of the Gas Temperature in Ozone Production of Mixture N2-O2

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Journal of Chemistry and Chemical Engineering 2012年第4期6卷 391-395页

作者： Mokhtarla Benyamma Khadidja Khodja Fatiha Ghaleb Ahmed belasri Laboratory of Plasma Physics Conductor Materials and Their Applications University of Sciences ＆ Technology of Oran MohamedBoudiaf （USTOMB） Oran 31000 Algerie

The ozone occurs naturally in the atmosphere and presents a filter of protection, absorbing the radiations wavelengths lower than 310 nm. The industrial generation of ozone is the classical application of the non-equilibrium air plasmas at the atmospheric pressure. A low temperature is needed because the ozone quickly decays at the high temperature. This study is based on a temporal kinetic model for the production of ozone. The chemical kinetics take into account 96 reactions with 19 species atomic and molecular created in the discharge. In this work, the model allows to calculate the temporal evolution of neutral, ionized and excited species concentrations in plasma. The results show the influence of the kinetic on the ozone production yield and on the gas heating by Joule effect.

关键词： Cold plasma kinetic model temporal N2/O2 ozone joule effect.

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