Salifou Koucka OUIMINGA

• PhD
• Deputy Head of Faculty at University Joseph KI-ZERBO

Abstract The fire behaviour of five types of wood was studied on a microscale. Some thermophysical parameters such as thermal conductivity, effusivity and diffusivity were also evaluated. The microscale analysis is based on the analysis of several parameters such as the assessment of heat released rates (HRR), peak heat released rates (pHRR), total...

Nous avons étudié la faisabilité technique de la valorisation des déchets papiers/cartons pour la fabrication des briquettes combustibles. L’objectif de cette étude est de contribuer à la valorisation matière de la filière déchets ménagers, précisément celle des déchets papiers/cartons. Pour l’aspect technique, l’étude a été faite sur l’impact de l...

The authors wish to make the following corrections to this paper [...]

The fire behaviour of flexible polyurethane foams was studied using a cone calorimeter, with a special emphasis on the collapse step. Only one peak of heat release rate, ranging from 200 to 450 kW/m2, is observed for thin foams, depending on the foam density and the heat flux. On the contrary, heat release rate (HRR) curves exhibit two peaks for 10...

Lignocellulosic agricultural residues are worldwide used for the production of activated carbons with purpose of eliminate a large range of pollutants such as diuron, a very persistent herbicide found in streams. This work studies the adsorption of diuron in aqueous solution on two different activated carbons, a commercial activated carbon and a pr...

Co‐gasification of wood mixed with 20% (mass fraction) of polyethylene (PE) in a two‐stage NOTAR® fixed‐bed gasifier was studied in the present paper. The ratio of air flow injected in the pyrolyzer and air flow injected in the oxidation zone is called the air ratio (AR). The AR of 0.35, 0.43, and 0.49 were used for test runs. Mass and energy balan...

Limited access to energy has led to interest in biofuels in most West African countries where Jatropha curcas (jatropha) has been the most widely studied energy crop. However, due to difficulties in obtaining enough jatropha seed at acceptable costs, Balanites aegyptiaca (B. aegyptiaca) could be an alternative feedstock for biofuel production at lo...

Numerical and experimental study of the gasification of raw and pretreated (torrefied and carbonized) cotton stalks were investigated. The experimental results were used to calibrate the quasi-equilibrium model by multiplying the equilibrium reaction constant with coefficient varying from 0.01 to 10 and by fixing the methane molar fraction. Values...

In arid and semi-arid climates, Balanites aegyptiaca (B. aegyptiaca) is a potential plant to produce oilseed-based biofuels. In this paper an optimization model for a wild biomass supply chain is presented. The model was developed to identify the optimal organization of the supply network that minimizes the cost of supplying the feedstock. It was a...

The present study focused on the combustion of four types of briquettes made from paper and cardboard waste produced in Ouagadougou (Burkina Faso). Rotary and tubular kilns were used to study the combustion. The combustion mean temperatures, nitrogen, phosphorus and potassium (NPK) content in the ash and heavy metals content in the ash and the flue...

The fire behaviour of five types of wood was studied on a microscale. Some thermophysical parameters such as thermal conductivity, effusivity and diffu- sivity were also evaluated. The microscale analysis is based on the analysis of several parameters such as the assessment of heat released rates (HRR), peak heat released rates (pHRR), total heat r...

In this work, the technical feasibility of cotton stalk carbonization and torrefaction was studied. A metallic homemade cylindrical furnace 60 cm in diameter and 90 cm in height was used for the experiments. A partial combustion process was used both for carbonization and torrefaction. Three carbonization methods were defined based on the amount of...

In this paper, we analyse and model the mass transfer of trichloroethylene in the surface layer of soil. Our study essentially focuses on arid soils taking into account the phase change liquid–vapour. We have then examined the validity of the assumption of local equilibrium by comparing the values of instantaneous pressure of the trichloroethylene...

The use of vegetable oils in burners represents an attractive alternative to the use of heating fuel oil (HFO) in heat production for domestic heating, small industrial units, drying of various products etc. In this work, a characterization of the combustion of cottonseed oil in a modified burner (type Riello 40N10) was performed to assess its abil...

This article presents the results on the volatilization of the volatile organic pollutants (VOP) during decontamination process from the soil. The choice of TCE as a volatile organic pollutant is explained by the fact that it is relatively highly soluble in water, compared to other compounds, which excludes any possibility of adsorption of its vapo...

This study concerns the experimental characterization and compaction of paper/cardboard coming from waste of the city of Ouagadougou. The characterization results show that the category of waste of paper and cardboard encountered in Ouagadougou contains 39 % corrugated cardboard, 28 % of office paper, 18 % of non corrugated cardboard, 7 % of newspr...

In this study, favorable conditions to achieve good combustion of cottonseed oil and its blends with diesel fuel in a direct injection diesel engine have been highlighted. This has been performed by analyzing fuel droplet size distribution and determining engine specific fuel consumption and thermal efficiency, combustion parameters (ignition delay...

This work concerns the study of the influence of air flow on yields of gas emissions during the combustion of a mixture of millet stalks and polyethylene bags in a prototype of kiln. During these investigations, we looked at the rate of residual oxygen (O2) and emissions of carbon dioxide (CO2) and nitrogen monoxide (NO) as a function of primary ai...

This study aims to experimentally characterize the gaseous carbonaceous and nitrogenous species from the reductive and oxidant combustion of polyethylene plastic bags. The experimental device used is the tubular furnace, coupled to two gas analyzers: a Fourier transform infrared analyzer (FTIR) and a non dispersive infrared analyzer (NDIR). The gas...

This paper concerns the study of the influence of the proportion of plastic from polyethylene, on the yields of gas emis-sions during the combustion of the mixture of "millet stalks and polyethylene plastic bags", in a prototype of kiln of potters. During these investigations, we looked at the rate of residual oxygen (O 2) and emissions of carbon d...

Millet stalks are used as fuel in pottering crafting in Africa. A study was conducted to characterize the gaseous species produced during the reductive and oxidative combustion of millet stalks. The experiment was carried out on temperature ranging from 800-1000 o C, using the tubular furnace, coupled with two gas analyzers i.e. Analyzer Fourier Tr...

In this work, a model for predicting evaporation characteristics (constant of evaporation and evaporation time) of cottonseed oil and diesel fuel has been developed and validated experimentally in the temperature range of 684–917 K under atmospheric pressure.The experimental study is based on the fibre-suspended droplet evaporation technique. The t...

This paper concerns the influence of temperature and local concentration of oxygen on the conversion efficiency of carbon into CO, CO 2 , CH 4 , C 3 H 8 , C 2 H 4 , C 2 H 2 , C 2 H 6 , C 6 H 6 , during the thermal degradation of plastic bags and millet stalks. The experimental device used is the tubular kiln, coupled to an analyzer Fourier Transfor...

Le présent travail concerne l’étude de l’influence des paramètres géométriques d’un four de potier, sur les rendements des émissions gazeuses polluantes, afin d’aider au dimensionnement de fours plus respectueux de l’environnement. Au cours de ces investigations, les émissions de NO, CO2, O2 et N2 ont été suivies. Les fours de potier considérés son...

This study aims to experimentally characterize the carbonaceous and nitrogenous species, from the flash pyrolysis of millet stalks and polyethylene plastic bags, using the device of the tubular kiln, coupled to two gas analyzers: Analyzer Fourier Transform Infrared (FTIR) and an analyzer Infrared Non-Dispersive (IRND). Gaseous products analyzed are...

This study aims to experimentally characterize the carbonaceous and nitrogenous species, from the flash pyrolysisofmilletstalksandpolyethyleneplasticbags,usingthedeviceofthetubularkiln,coupledtotwo gasanalyzers:AnalyzerFourierTransformInfrared(FTIR)andananalyzerInfraredNon-Dispersive(IRND). Gaseous products analyzed are: CH4,C 2H2,C 2H4,C 3H8,C 6H6,...

This work is a comparative experimental study of the emissions of gas species during combustion of polyethylene pellets and plastic films containing polyethylene. Two significant parameters of thermal degradation are studied for each of the two matrixes : the temperature and the mass. This study was carried out using the experimental device of the...