http://www.iiste.org/Journals/index.php/CPER/issue/feedChemical and Process Engineering Research2017-04-02T11:41:12+00:00Alexander Deckeradmin@iiste.orgOpen Journal Systems<p><span id="internal-source-marker_0.04939836589619517">Chemical and Process Engineering Research <span id="internal-source-marker_0.04939836589619517">is a peer reviewed journal published by IISTE. The journal publishes original papers at the forefront of chemical engineering, process management and instrumentations. The journal is published in both printed and online versions. The online version is free access and download.</span></span></p><p><span>IISTE is member of <a href="http://www.crossref.org/01company/17crossref_members.html">CrossRef</a>. </span></p>http://www.iiste.org/Journals/index.php/CPER/article/view/35861Journal coverpage2017-04-02T11:41:12+00:00Journal Editord@d.comJournal coverpagehttp://www.iiste.org/Journals/index.php/CPER/article/view/35862Biodegradable Plastic Characteristics of Cassava Starch Modified in Variations Temperature and Drying Time2017-04-02T11:41:12+00:00Bambang Admadi Harsojuwonod@d.comI Wayan Arnatad@d.comSri Mulyanid@d.com<p>This study aims to (1) know the effect of temperature and drying time on the characteristics of biodegradable plastic from cassava starch modified, (2) determine the temperature and drying time is right to produce biodegradable plastics from cassava starch modified with the best characteristics. This study uses a randomized block design with factorial experiment. The first factor is the temperature of the drying which consists of 5 levels that were 50 ° C, 55 ° C, 60 ° C, 65 ° C and 70 ° C. The second factor is the drying time consists of 3 levels, namely 5, 6 and 7 hours. Each combination of treatments grouped into two based on process making of biodegradable plastic, so there are 30 experimental units. Data were analyzed of variance and followed by Duncan test. The observed variables include mechanical and physical test consists of tensile strength, elongation at break, Young's modulus (elasticity), swelling of volume and degradation time. The results of the research showed that the temperature and drying time by using automatic cabinet dryer with an air flow 5 <span style="text-decoration: underline;">+</span> 0.1 m<sup>3</sup> / min, very significant effect on tensile strength, elongation at break, Young's modulus, percent swelling of volume and time of degradation biodegradable plastic of cassava starch modified. Temperature of 50 ° C with 5 hours drying by using automatic dryer cabinet with an air flow of 5 <span style="text-decoration: underline;">+</span> 0.1 m3 / min, had characteristics of biodegradable plastics : tensile strength of 1057.40 M Pa, elongation at break of 15.95%, Young's modulus of 6629,47 M Pa, swelling of volume of 9.91% and degradation time of 7 days.</p> <p><strong>Keywords: </strong>biodegradable plastic, cassava starch modified, temperature and drying time</p>http://www.iiste.org/Journals/index.php/CPER/article/view/35863Development of Mathematical Models for Thermal Conductivities of Some Engineering Materials2017-04-02T11:41:12+00:00Adebiyi K. A.d@d.comSangotayo E. O.d@d.com<p>Thermal conductivity equipment was developed using locally available materials. The equipment consists of the sample holder, the thermometer probe cavity, the heating cavity and the structural wooden frame, performance evaluation was carried out using four different materials (iron, brass, mild steel and aluminum). The experimental studies were carried out at different time; 300 seconds interval (from 300 through 1500seconds) on the four materials and temperatures reading were recorded. The results of experimental studies were modeled to develop regression equations for predicting thermal conductivities of the materials. Analysis of Variance (ANOVA) and statistical t-test were carried out to validate the models at 5% level of significance. The experimental results show that Aluminum has highest thermal conductivity with respect to temperature while a linear model with coefficient of determination, R<sup>2</sup> (0.9097) was obtained. Statistical tests for each of models developed and the experimental results show that there is no significant difference at 5% level of significance. It is concluded that the models developed could be used to predict thermal conductivity for the four materials with good accuracy with respect to time.</p> <p><strong>Keywords</strong>: Performance evaluation, thermal conductivity, ANOVA</p> <p><strong> </strong></p>http://www.iiste.org/Journals/index.php/CPER/article/view/35864Chemically Reacting Radiative Casson Fluid Flow over a Vertical Plate in the Presence of a Heat Source/Sink and Aligned Magnetic Field2017-04-02T11:41:12+00:00R. Vijayaragavand@d.com<p>In this study, we investigated the heat and mass transfer characteristics of the MHD Casson fluid flow over a vertical plate in the presence of thermal radiation, chemical reaction and heat source/sink with buoyancy effects. The aligned magnetic field is applied along the flow direction. The governing partial differential equations are transformed as non-dimensional ODE’s using suitable transformation and resulting equations are solved using Perturbation technique. The effects of various non-dimensional governing parameters, namely thermal radiation, chemical reaction, heat source/sink, Prandtl number, Grashof number, magnetic field parameter, inclined angle parameter and slip parameter on the flow, mass and heat transfer is analyzed for both Casson and Newtonian fluid cases. Also the friction factor, the local Nusselt number and Sherwood number are discussed and presented graphically. It is found that aligned magnetic field parameter has tendency to control the flow and thermal field.</p> <p><strong>Keywords: </strong>MHD, Casson fluid, thermal radiation, heat source/sink, buoyancy effect, chemical reaction.</p>http://www.iiste.org/Journals/index.php/CPER/article/view/35865Non-Darcy Convective Heat and Mass Transfer Flow in a Vertical Channel2017-04-02T11:41:12+00:00P. Sreenivasa Raod@d.com<p>We make an attempt to investigate<strong> </strong>non-Darcy convective heat and Mass transfer flow of a viscous chemically reacting fluid in a vertical channel .The Brinkman Forchheimer extended Darcy equations are used in the governing linear momentum equation, which are solve numerically by using Galerkin finite element technique. The velocity, temperature, concentration, shear stress and rate of Heat and Mass transfer are evaluated numerically for different variations .It is noticed that the temperature and concentration reduce while the velocity increases in the degenerating chemical reaction ( g>0) while in the generating case(g<0), they reduce in the entire flow region The rate of heat and mass transfer reduce and the skin friction increases on the walls with increase in g>0, while a reversed effect is noticed with g<0.</p> <p><strong>Keywords: </strong>Non-Darcy Flow, Porous Medium, Chemical reaction, Vertical Channel<strong></strong></p>