Abbreviation: J. Chem. Eng. Mater. Sci.
Start Year: 2010
Page 2 of 4, showing 20 records out of 76 total, starting on record 21, ending on 40
https://doi.org/10.5897/JCEMS2014.0182[Article Number: FF7E25546435]
This work presents two developments in Antoine vapor pressure correlation: (1) Generalization of the correlation using the principle of corresponding state; (2) Prediction of the Antoine coefficients form molecular weight. The coefficients of the generalized correlation are correlated to molecular weight (r2=0.99) for the group of normal alkanes (C1 to C20). The method is validated using experimental data obtained from... Read more.
https://doi.org/10.5897/JCEMS2014.0176[Article Number: D79564246308]
The potential of using used-water-sachets, a synthetic polymeric waste, which is not only readily available but indiscriminately littered around Nigerian urban and rural areas, as an adsorbent in removal of oil spilled on water was investigated. Used-water-sachets, a waste generated all over the country, has been converted into a low cost adsorbent. The sachets were collected, pretreated and pulverised to adsorb crude... Read more.
https://doi.org/10.5897/JCEMS2014.0177[Article Number: 93ABCC745844]
This paper presents the results obtained and the discussion made from a series of corrosion experiments involving aluminum alloy (LM 13) reinforced with Nano-ZrO2, size of the particles dispersed varies from 100 to 200 nm and amount of addition varies from 3 to 15 wt.% in steps of 3 wt.%. The resulting CNMMCs are solidified under the influence of copper chill of 25 mm thickness to study the effect of corrosion behavior.... Read more.
https://doi.org/10.5897/JCEMS2014.0181[Article Number: 0F8CABD45848]
An excellent conversions of benzaldehyde was obtained under solvent and solvent free conditions by utilizing Co(im)20.5 DMA as catalyst for the synthesis of benzylidene malononitrile. The catalytic prospect of this crystalline porous framework was extended to oxidation reactions involving ethylene glycol (EG) and ethylbenzene (EB). Unexpectedly, EG was totally oxidized to oxalic acid; which demonstrates the catalyst... Read more.
https://doi.org/10.5897/JCEMS2014.0172[Article Number: D07831944426]
As developing nations strive for economic sustainability, effort is geared towards exploiting biomass materials that could have alternative uses to their conventional low valued uses in order to achieve this goal. It is because of this that palm kernel shell, a byproduct of oil palm processing, is characterized for its application in construction and water treatment industries. The materials physical and chemical... Read more.
https://doi.org/10.5897/JCEMS11.036[Article Number: 80A106A42211]
A time dependent atmospheric model is represented for chemically reactive primary pollutants emitted from an elevated line source into a stable atmospheric boundary layer, over rough surface terrains. The time dependent model was obtained through an analytical solution from a multiple Inverse Laplace transform of the atmospheric diffusion equation with the parabolic eddy-diffusion coefficient (exchange coefficient) and... Read more.
https://doi.org/10.5897/JCEMS2013.0161[Article Number: 75C20D642213]
Based on the status of the air pollution in China, three basic assumptions are proposed. The China’s inter-provincial cooperative control of air pollution (ICCAP) model is established by the combination of national optimization model and allocation model of cooperation benefit. A case study for the pollutant SO2 control in China shows that the proposed model is superior to the current command-order regulation. Our... Read more.
https://doi.org/10.5897/JCEMS2013.0163[Article Number: 927AF0742214]
The paper predicts the exceptional extreme pressure properties of multi walled carbon nano tube as compared with traditional mineral oil which also contained some additives and graphite. The extreme pressure property was predicted by four ball tester. In the test the load bearing capacity of the newly developed nano oil was predicted to have a better value than the commercial available mineral oil. The weld load of the... Read more.
https://doi.org/10.5897/JCEMS2013.0162[Article Number: 2AF641441706]
This work focuses on the solar photocatalytic degradation of phenol using nanosized ZnO and α-Fe2O3 synthesized via precipitation route. The synthesized ZnO and α-Fe2O3 were characterized using XRD, UV/Vis and surface area analysis. α-Fe2O3 was found to exhibit better solar photocatalytic activity than ZnO under identical experimental conditions due to the larger surface area and low band gap of... Read more.
https://doi.org/10.5897/JCEMS2013.0148[Article Number: 35E9A8B41707]
Thin films were developed, characterized, and optimized for optical absorbance from blends of organic polymer poly (3-hexylthiophene-2, 5- diyl) (P3HT) and the fullerene derivative [6, 6] phenyl-C61-butyric acid methyl ester (PCBM). The materials of both pristine and blends were analyzed using X-ray diffraction spectroscopy and high resolution transmission electron microscopy for structural properties, and fourier... Read more.
https://doi.org/10.5897/JCEMS2013.0165[Article Number: B02AD0A40108]
Tannery wastewater with high biological oxygen demand (BOD5) was treated with ZnO-ZnFe2O4composite photocatalyst supported on activated carbon under visible light irradiation. Only 9% of BOD5 in the raw effluent were removed via adsorption on the surface of the photocatalyst in the dark for two hours. Photocatalysis with ZnO-ZnFe2O4 composite photocatalyst on activated carbon support removed 90% of... Read more.
https://doi.org/10.5897/JCEMS2013.0164[Article Number: 30CDCB740104]
Extracted Jatropha oil was analyzed for their chemical and physical properties such as density, acid value, % FFA, saponification value as well as viscosities at 40 and 100oC and viscosity index. The result of the analyses of the Jatropha oil reveals that it has a very high %FFA (14.6%). Reduction was achieved by esterification with methanol (to 0.44%). The method employed for the production of biolubricant... Read more.
[Article Number: B0273B52074]
Thin films of Copper Tin Selenide (Cu2SnSe3), were successfully deposited on well-cleaned glass substrates by thermal evaporation technique. The as-deposited films were annealed in flowing purified nitrogen, N2, for 2 h in the temperature range from 100 to 500°C. The annealing temperature effect on thin films crystallization and light effect on electrical conductivity had been investigated. X-ray... Read more.
https://doi.org/10.5897/JCEMS2013.0152[Article Number: FF5ACC63048]
The effectiveness of adsorbents (unactivated and acid activated) developed from local raw materials - clay and diatomaceous earth samples - sourced from various geographical locations in northern Nigeria for use in the adsorptive bleaching of palm oil was studied. Two acids namely hydrochloric and sulphuric acids of varying strengths 20, 30 and 45% were used for the activation. A batch adsorption process of... Read more.
https://doi.org/10.5897/JCEMS2013.0153[Article Number: B613F493060]
In this paper, magneto hydro dynamic (MHD) Jeffery-Hamel flow with nanoparticle has been investigated and its nonlinear ordinary differential equation has been solved through homotopy perturbation method (HPM). The governing boundary layer equations are written into a dimensionless form by similarity transformations. The effect of semi-angle has also been investigated in both convergent and divergent channel.... Read more.
https://doi.org/10.5897/JCEMS2013.0158[Article Number: 3EE68AD2977]
Biogas digester operation depends majorly on C/N ratio, hydraulic retention time, pH, temperature, and mixing ratio of the domestic waste used. Temperature of 15 to 45°C, C/N ratio of 20 to 30, Hydraulic retention time of 1 to 30 days, mixing ratio of 10 to 20 %w/v and pH of 6.5 to 8 were considered for the analysis. Analysis of Variance (ANOVA) was used to test whether there are statistically significant... Read more.
https://doi.org/10.5897/JCEMS2013.0156[Article Number: 6D0E2212996]
Preparation of nickel (Ni) nanoparticles in the silica gel matrix for various concentrations has been achieved at low temperature. The presence of metallic Ni has been confirmed by x-ray diffraction and further supported by the presence of bright filed transmission electron microscope image, which shows presence of 5 to 8 nm diameter nanoparticles. The dielectric property was studied using complex... Read more.
https://doi.org/10.5897/JCEMS2013.0154[Article Number: 8C590202923]
Kinetic data obtained from acid demineralization (using 1.25 N hydrochloric acid solution) of deproteinized exoskeleton of shrimp was fitted to the shrinking core models for heterogeneous reactions. The element of interest was calcium which was the most abundant element in the deproteinized shrimp (66.27%) and the mostly affected by the demineralization. Experimental kinetic data was fitted to the shrinking... Read more.
https://doi.org/10.5897/JCEMS2013.0150[Article Number: B93D7EA2944]
Failure of engineering components due to presence of defects in the material is common. These defects are either present in the material from the casting stage or get developed during subsequent hot working and thermal treatment operations. Identification of the origins of defects is an important task while analyzing failures where pre-existing defects in the material are the causative factors. A case study... Read more.
https://doi.org/10.5897/JCEMS11.040[Article Number: A440B882854]
80 sachet water products from 10 different brands were sampled in four study locations in Aba and Port Harcourt (PH) cities respectively. Sampling was carried out by stratified simple random techniques. The products were bacteriologically assessed weekly for 12 months between January and December, 2008. Samples were exposed to sunlight (SL) and room temperature (RT) and analysis done using membrane filter... Read more.
Page 2 of 4, showing 20 records out of 76 total, starting on record 21, ending on 40