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Experimental Study on Performance and Combustion Analysis of a Diesel Engine Fueled with Diesel and Jatropha Oil Blended with Heptane

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Energy and Power Engineering 2021年第1期13卷 1-16页

作者： Yomi Woro Gounkaou Tizane Daho Ali Diane Gilles Vaitilingom Bruno Piriou Jeremy Valette Oumar Sanogo Antoine Béré Département de Physique Université Joseph KI-ZERBO Ouagadougou Burkina Faso biomasse bois energie bioproduits Montpellier France Centre National de la Recherche Scientifique et Technologique Ouagadougou Burkina Faso

This work focuses on blending Jatropha oil with diesel fuel and heptane to improve its physico-chemical characteristics for production of blends and their use as fuel in a diesel engine. The influence of the heptane content was evaluated by comparing the results obtained from the engine (performance and combustion parameters) with those of the diesel fuel and straight Jatropha oil. The results obtained show an improvement in engine performance especially at low loads. Specifically, a reduction in the specific fuel consumption of the engine is obtained when the heptane content in the mixture is around 10% compared to that obtained with pure Jatropha oil. The best results were obtained with the blend containing 70% Jatropha oil, 20% diesel fuel and 10% heptane (J70G20H10). Overall engine efficiency and exhaust gas temperatures are comparable for all fuels tested. Engine combustion parameters are improved with J70G20H10. The results obtained with J70G20H10 are close to those of the engine operating on diesel fuel. The cyclic dispersion is low with coefficients of variation of the indicated mean effective pressure (COVIMEP) whose values are less than 10%. The lowest values of the COVIMEP are obtained with the blend J70G20H10.

关键词： Diesel Engine Jatropha Oil Heptane Blends Engine Performance Cyclic Dispersion

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Experimental Investigations on the Physical and Mechanical Properties of a Lightweight Concrete Using Oil Palm Shell as Coarse Aggregate

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材料科学与工程（中英文A版） 2017年第3期7卷 157-168页

作者： Yasmine Binta TRAORE Adamah MESSAN Kinda HANNAWI Jean GERARD William PRINCE-AGBODJAN Francois TSOBNANG lnstitut International d'Ingenierie de l'Eau et de l'Environnement (2iE) Laboratoire Eco-Materiaux de Construction (LEMC) Rue de la Science 01 BP 594 Ouagadougou 01 Burkina Faso INSA-Rennes Laboratoire de Gdnie Civil et Genie mecanique (LGCGM) 20 Avenue des Buttes de Coesmes CS 70839 35708 Rennes Cedex 7 France Centre de cooperation International en Recherche Agronomique pour le developpement (CIRAD) UPR Biomasse Energie TA B-42/16 73 rue Jean Francois Breton 34398 Montpellier Cedex 5 France

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Phytochemical Screening and Assays of Phenolic Compounds in Senna occidentalis L. Leaf and Seed Extracts

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Food and Nutrition Sciences 2024年第7期15卷 499-508页

作者： Edmond Antoine Badock Lahat Niang Abdoulaye Dramé Célestine Nkounkou-Loumpangou Omar Touré Omar Sokhna Nicolas Cyrille Ayessou Mady Cissé Ecole Suprieure Polytechnique Laboratoire Eau Energie Environnement et Procds Industriels (LE3PI) Universit Cheikh Anta Diop Dakar Sngal Ecole Suprieure Polytechnique Centre dEtudes sur la Scurit Alimentaire et les Molcules Fonctionnelles (CESAM-RESCIF) Universit Cheikh Anta Diop Dakar Sngal Laboratoire de Valorisation des Produits de la biomasse Dpartement de Chimie Universit Cheikh Anta Diop de Dakar Dakar Sngal Unit de Chimie du Vgtal et de la Vie Facult des Sciences et Techniques Universit Marien NGOUABI Brazzaville Republic of the Congo Laboratoire de Chimie Organique et Bio-Organique Dpartement de Chimie Facult des Sciences et Techniques/UCAD Universit Cheikh Anta Diop Dakar Sngal

Phytochemical screening and assay of secondary metabolites, crude extracts with distilled water, aqueous methanol, aqueous acetone and aqueous ethanol of leaves and seeds of Senna occidentalis L. were studied in this work. The aim was to verify the distribution of secondary metabolites according to S. occidentalis organs. Four leaf samples from four different localities (South, East, West and Central Senegal) and a mixed sample of seeds were used. Functional molecules such as polyphenols, flavonoids and tannins were then assessed in the leaves and seeds using various standard methods. The results show that Senna occidentalis L. leaf and seed samples display an identical and homogeneous profile, regardless of locality. They contain secondary metabolites and the polyphenol content of extracts from southern, eastern, western and central leaves is: 0.620 - 0.539 - 0.811 - 0.573 g GAE/100 g DM;flavonoids: 0.064 - 0.074 - 0.130 - 0.101 g CE/100 g DM and tannins: 0.326 - 0.264 - 0.269 - 0.494 g TAE/100 g DM. The efficacy of S. occidentalis L. infusions in therapy is thus justified by the presence of these metabolites, whose biological properties are well known. It is then possible to explore isolation of active principles of Senna occidentalis L. leaves and even seeds for producing medicines.

关键词： Senna occidentalis L. Total Polyphenols Flavonoids Tannins

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