Journal of
Chemical Engineering and Materials Science

  • Abbreviation: J. Chem. Eng. Mater. Sci.
  • Language: English
  • ISSN: 2141-6605
  • DOI: 10.5897/JCEMS
  • Start Year: 2010

JCEMS Articles in press

Structural properties of high density polyethylene matrix composites reinforced with open air and furnace rice Husks Ash

Article in Press

In this work, rice husks ash (RHA) was introduced to pure and recycled High density Polyethylene (HDPE) matrix, at varying ration (0-50%) to formulate rice husks ash High density Polyethylene (RHA-HDPE) composite. RHA was obtained by burning fresh rice husks either by open-air burning (oRHA) or furnace calcination at 700? (fRHA). The composite samples were made by melt-mixing the HDPE in an oven at a temperature of 150?...

Author(s):Jonathan M.K, Osamong G. A, Butembu S, Kamweru P. K, Gichumbi J.M. and Ndiritu F.G.

Structural and morphological characterization of aluminum doped zinc cobalt ferrites prepared by Sol-Gel autocombustion method

Article in Press

Synthesis of aluminum doped zinc cobalt ferrite with composition of AlxZn1-xCoFe2O4 (0.00?x?1.00) was done by sol gel method and calcined at 650?. The structural, morphological, and quantitative analysis of the elements was done. The structural properties were studied by the X-Ray Diffractometer (XRD) which revealed that the crystal size was 2.115nm, it also revealed the spinel nature of the synthesized ferrite. The...

Author(s):Butembu Sabastine, Osamong Gideon Akou, Kamweru Paul Kuria, Gichumbi Joel Mwangi and Ndiritu Francis

Analysis of the effect of feed composition and thermal conditions on distillation plant performance using a computer model

Article in Press

This paper presents the effect of feed composition, xF, and feed thermal conditions on the benzene-toluene distillation plant performance. An interactive computer model was developed to simulate the process using vapor–liquid equilibrium (VLE) data, mass and energy balances and McCabe-Thiele method. The feed thermal conditions studied were vaporized feed (VF), feed at its boiling point (FBP) and subcooled liquid (SCL)...

Author(s):Manyele S.V.

Purification of cobalt solutions in several solvent extraction steps: Using MEXTRAL and D2EHPA as extractants

Article in Press

A sulphate solution of cobalt (18.93 g/L Co2+) containing major impurities such as copper (1.35 g/L Cu2+) , iron (0.28 g/L Fetot), zinc (0.70 g/L Zn2+) and manganese (4.83 g/L Mn2+) was purified through the solvent extraction method using two extractants; MEXTRAL and D2EHPA for the removal of copper and for the removal in two stages of a zinc-iron-manganese complex respectively. The effects of the solution’s pH, the O/A...

Author(s):Mulaja Tshakatumba Constantin, Tshipeshi Makina Héritier, Ngoy Moïse Raphael Moramess and Mwema Mutamba Edouard

Physicochemical characterization of Grewia spp. biopolymer, a potential coagulation-flocculation agent

Article in Press

Powdered Grewia spp. barks was extracted in water and one part of the extract was precipitated with absolute ethanol. Both the crude water extract and the ethanol precipitate was freeze dried, pulverized into powder and subjected to physicochemical analyses. Amongst others: proximate composition, morphology and metal contents by SEM-EDX, functional group by FTIR, crystallinity by XRD, thermal behavior via DSC and TGA. The...

Author(s):Kameni Ngounou M. Bernard, G. R. Nkou Ndongo, Kofa G. Patricea Daniel E. Egbe. Ndi K. Sylvere, Kayem G. Joseph

Approximation of the effect of pressure on triple effect evaporator performance using fourth degree polynomial functions

Article in Press

This paper presents a computer model results for investigation of the effect of pressure in the last effect (Pv3) on the performance of triple-effect evaporator (TEE). The model was designed to address steady state conditions. The study covered forward feed evaporation mode, with wide range of evaporator capacity (500-10,000 kg/h). The temperature of steam was varied between 100 and 400 kPa-g while the pressure in the...

Author(s):Evaporator pressure, boiling temperature, overall temperature difference, steam economy, sizing of heat transfer area

Morphological and Mechanical Characterizations of Neuropeltis acuminatas (NA) Fibers

Article in Press

His present work aims to determine the morphological and mechanical characteristics of fibers from a Cameroon liana locally called "Ndik Kussa" scientific name Neuropeltis acuminatas (NA). The vines are cut in a forest of southern CAMEROON in NGALANE by EBOLOWA. The fibers are extracted by us using the traditional method used to make the kussa. SEM micrographs of the cross section of the fiber are made and tensile tests on...

Author(s):SERGE YANNICK

Natural non poisonous green inhibitors of Withania Somnifera, Glycyrrhiza Glabra and Tinospora Cardifolia for mild steel in 3.5% NaCl.

Article in Press

By means of polarization measurements, UV and IR study it has been detected that the extract of Withania Somnifera, Glycyrrhiza Glabra and Tinospora Cardifolia leaves can act as corrosion inhibitor for the sake of mild steel in 3.5% NaCl. These plants show good inhibition efficiency at particular concentrations of the NaCl. It is observed that plant extracts act as better inhibitor on increasing their concentration. Here...

Author(s):DWARIKA PRASAD MAITHANI

Mass Transfer Modeling In Pulsed Sieve Plate Extraction Column By Using Effective Diffusion Coefficient with New Approach AGM

Article in Press

Liquid-liquid extraction columns scale up and design requires accurately prediction of overall mass transfer coefficient Koc. Already many methods have been suggested by investigators to predict this coefficient. One of these methods is substitution of effective diffusion coefficient (Deff = RD) instead of diffusion coefficient (D) in Newman equation. We surveyed some correlations suggested for R, and compared their...

Author(s):GANJI HAMED, Davood domiri-Ganji

THE EFFECT OF PPG/PCL POLYOLS MIXTURE ON PROPERTIES OF BIODEGRADABLE POLYURETHANE FOAM

Article in Press

Polyurethane foams (PUF) are synthesized by polyaddition polymerization of difunctional isocyanates and multifunctional alcohols (polyols). The PUF properties are primarily depended on raw materials. In this study, the properties of PUF synthesized from aromatic diisocyanate were compared with PUF synthesized from aliphatic diisocyanate. The effects of molar ratios between hydrophilic (PPG) and hydrophobic (PCL) polyols...

Author(s):Mutitaporn Pimdeed, Noppawan Mothong, Piyasan Praserthdam

Effect of γ'' and γ' Precipitates on the Properties of Cu-Be Alloy

Article in Press

The effects of γ'' and γ' precipitates on the properties of the Cu-Be alloy have been investigated by many researchers. The hardness changes measurements and differential scanning calorimetry (DSC) dilatation analysis were used in this study to investigate the effect of the precipitated phases for the cold rolled and non-deformed specimens during isothermal and low heating rate aging of 2℃/min. Through an isothermal...

Author(s):Masoud Ibrahim Masoud

Development of Nano-composite Adsorbents for the Removal of Heavy Metals from Industrial Effluents via Batch Study (Part 1)

Article in Press

Pollution of the aquatic environment by heavy metals has detrimental effects on living species. In this work, Nano-composite Adsorbents were developed using agricultural waste (i.e. Palm Kernel shell, Coconut shell and Bamboo stem). These agro-wastes were collected, dried separately and repeatedly crushed to a Nano-size. The characterization of these adsorbents were done separately using SEM and Zetasizer machines. The...

Author(s):MORUFU ADEREMI OLATUNJI, A.S. KOVO

PRODUCTION OF BIOGAS FROM CO-DIGESTION OF COW DUNG, SAW DUST AND MAIZE HUSK

Article in Press

The co – digestion of cow dung, with maize husk for biogas production at laboratory scale was investigated. The study was carried out at a temperature range of 24 oC – 30 °C and pH range of 5.5 – 6.5 for a period of 60 days with a total solid concentration of 7.4% in the digester sample (fermentation slurry). Water displacement method was used to collect the biogas produced which was subsequently measured. 444.8 mL...

Author(s):Okewale, A. O.

MECHANICAL PROPERTIES OF NATURAL RUBBER FILLED WITH CHEMICALLY TREATED GROUNDNUT SHELL FILLER

Article in Press

Physico-Mechanical properties of natural rubber filled with chemically modified Groundnut shells were studied. Natural rubber composites were prepared using modified fillers at varying concentrations of sodium hydroxide (NaOH) Solution and acetylating solutions respectively. The proceability conditions, mechanical properties and sorption characteristics of these composites were analyzed. The cure characteristics of the...

Author(s):MARK DADA AYO, I.C. Madufor, O. Ogbobe

Study of the diffusion behavior of water vapor sorption in natural fiber: Rhecktophyllum camerunense

Article in Press

The present work focuses on the study of the water absorption phenomenon in Rhecktophyllum camerunense (RC). Indeed the diffusive behavior of RC natural fiber was investigated. The fibers samples of 0.1g were submitted to hygro-thermal ageing in an environmental enclosure of 23%, 54% and 75% relative humidities at 23°C. Periodic gravimetric measurements were achieved on the specimens in order to follow their kinetics...

Author(s):BORIS NOUTEGOMO

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