Journal of Engineering Research and Reports <p style="text-align: justify;"><strong>Journal of Engineering Research and Reports</strong>&nbsp;<strong>(ISSN: 2582-2926)</strong> aims to publish high-quality papers in all areas&nbsp;of engineering.&nbsp;The journal also encourages the submission of useful reports of negative results. This is a quality controlled,&nbsp;OPEN&nbsp;peer-reviewed, open access INTERNATIONAL journal.</p> SCIENCEDOMAIN international en-US Journal of Engineering Research and Reports 2582-2926 Comparative Studies and Optimization of the Process Factors for the Extraction of Beta-carotene from Palm Oil and Soybean Oil by Solvent Extraction <p><a name="_Toc19346959"></a><a name="_Toc16948856"></a><a name="_Toc16947170"></a>This research focuses on the extraction of beta-carotene from palm and soybean oils using solvents (Ethanol and Acetone), taking into account the effect of the extraction process factors such as time, temperature, dosage of the oil samples, solvent volume and solvent type. The extraction of beta-carotene from palm and soybean oils using acetone and ethanol was positively influenced by increase in temperature, time, solvent volume, dosage of the oil samples and solvent type. The effect of temperatures was carried out within the temperature ranges of 35ºC, 40ºC, 45ºC and 50ºC. It was observed that increase in temperature resulted in increase in concentration and 45ºC gave the highest concentration. From the study, it was observed that the extraction process for beta-carotene almost reached equilibrium after 50 mins for palm oil and 45 mins for soybean oil. Between acetone and ethanol used, ethanol was found to be the best solvent for the extraction of beta-carotene from palm oil and soybean oil. From the results, the concentration of the extracted beta-carotene increased as the volume of the solvent increased using both acetone and ethanol on both substrates. The concentration of extracted beta-carotene increased with increase in the dosage of the oil samples (palm and soybean). The increase in concentration could be attributed to the more active sites due to increase in the substrate volume.</p> Samuel O. Egbuna Donatus C. Onwubiko Christian O. Asadu ##submission.copyrightStatement## 2019-11-11 2019-11-11 1 16 10.9734/jerr/2019/v8i216984 The Effects of Some Thermo-physical Properties of Fluid on Heat and Mass Transfer Flow Past Semi-infinite Moving Vertical Plate with Viscous Dissipation <p>This paper examines the effect of some thermo-physical properties of fluid on heat and mass transfer flow past semi-infinite moving vertical plate. The fluid considered is optically thin such that the thermal radiative heat loss on the fluid is modeled using Rosseland approximation.The governing partial differential equations in dimensionless forms are solved numerically using the Method of Lines (MOL). The velocity, the temperature, and the concentration profiles of the flow are discussed numerically and presented. Numerical values of the skin-friction coefficient, Nusselt number, and Sherwood number at the plate are discussed numerically for various values of thermo-physical parameters and they are presented by the tables.The result shows that an increase in thermal radiation causes increase in velocity and temperature profiles of the flow, thus, the thermal radiation intensifies the convective flow. Also, an increase in Soret number causes increase in velocity and concentration profiles of the flow while the effect is negligible on temperature profile distribution. Similarly, an increase in Dufour number causes increase in velocity and temperature profiles of the flow.</p> M. O. Durojaye K. A. Jamiu I. O. Ajala ##submission.copyrightStatement## 2019-11-18 2019-11-18 1 11 10.9734/jerr/2019/v8i216985 Analysis of Reactive Flow of Third-grade Exothermi Chemical Reaction with Variable Viscosity and Convective Cooling <p>The study examines incomprssible laminar Poiseuille flow of a non-Newtonian fluid and heat transfer in a cooling convective fixed wall. The third-grade exothermic reactive fluid is stimulated by heat generation, gradient pressure and thermal buoyancy force. The convective exchange of temperature with the ambient takes after Newtons cooling law. Transilation of the formulated equations to the non-dimensional form is done using relevance quantities and solutions to the nonlinear equations are provided by employing Weighted residual techniques. The obtained solutions for the flow rate, energy, flow wall friction and temperature gradient are graphically plotted for the reactive flow system. Numerical validation of results in comparison with the presented method of solution is carried out. The results revealed that some parameters which are strong heat generation or source should be consciously guided to avoid reactive solution blow up in the exothermic system.</p> J. F. Baiyeri M. A. Mohammed O. A. Esan T. O. Ogunbayo O. E. Enobabor ##submission.copyrightStatement## 2019-11-19 2019-11-19 1 10 10.9734/jerr/2019/v8i216986