Research ArticleOpen accessIn the keywordsPurification of Natural Gas with Impurities using Membrane Processes: Parameter EstimationN. W. Jusoh, K. K. Lau, A. M. ShariffProblem statement: Membrane processes have received a significantly high attention on natural gas separation processes since this technology provides higher operating and cost advantages as compared to other technologies. One of the major problems related to natural gas separation using membrane is the existence of feed impurities including CO2, heavy hydrocarbon and water. Approach: Hence, mathematical model that is able … …American Journal of Engineering and Applied Sciences, Vol. 5, Issue 1 · 22 May 2012 · 8,426 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSorption of Phenols: Influence of Groundwater pH and of Soil Organic Carbon ContentSilvia Fiore, Maria Chiara ZanettiProblem statement: Physical and chemical properties of soil, groundwater and pollutants deeply influenced the type and the strength of sorption phenomena involving hydrophobic organic contaminants: Soil fraction of organic carbon (foc) and cation exchange capacity, groundwater pH and pollutants hydrophobicity were with undoubtedly the predominant issues. Approach: In this study an experimental study of the sorption of phenol and 2-nitrophenol … …American Journal of Environmental Sciences, Vol. 5, Issue 4 · 31 Aug 2009 · 7,007 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalysis of Abnormal Modes of Hoisting DC Electric Drive SystemKosmas ZdrozisProblem statement: Host number of publications in which special attention was given to the behavior of the hoisting drives in abnormal modes was found. The effect of the failure of the main power supply on the electrical and mechanical parts of the hoisting drive when the motor is operating in the regenerative braking mode was not enough studied. Approach: In … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 7,241 accessesView PDFCite