International Conference on Industrial Chemistry June 27-28, 2016 New Orleans, Louisiana, USA

Noureddine Ouerfelli has a PhD and Habilitation Diploma in Chemistry; he is a head of research project in the Laboratory of Biophysics and Medical technologies. He has published more than 45 papers in reputed journals on modeling of Physicochemical properties in solution

Knowledge and estimation of transport properties of fluids are necessary for mass flow and heat transfer. Viscosity is one of the main properties which are sensitive to temperature and pressure variation. In the present work, based on the use of statistical techniques for regression analysis and correlation tests, we propose an original equation modeling the relationship between the two parameters of viscosity Arrhenius-type equation (ln = lnAs + Ea/RT). Empirical validation using 70 data set of fluids provided from the literature and studied at different temperature ranges gives excellent statistical results which allow us to redefine the Arrhenius-type equation using a single parameter instead of two ones ( ). More, causal correlation between these parameters and the normal boiling temperature (Tb) of the corresponding fluids leads us to propose two predictive empirical equations one with the activation energy ( ) and one with the logarithm of pre-exponential factor ( ). We conclude that the boiling temperature is in causal correlation with the two Arrhenius parameters, but with other physical and chemical properties implicitly for which there are some ones are common for the two Arrhenius parameters while others are in relationship only for a single parameter (lnAs) or (Ea). To correct this observation, we will try to suggest in future works, an expression both explicit, the two viscosity Arrhenius parameters Tb(Ea,lnAs) alternatively in the numerator and in the denominator. Note that this equation is tested to some heavy oils with reliable agreement for which we can conclude that it can be useful for petroleum chemistry.

KHIR Tahar is Professor in Mechanical Engineering at National Engineering School of Gabes – Tunisia. He was Adviser of the Minister of Higher Education and Scientific Research from 2012 to 2014. He received his BSc in Mechanical Engineering from the University of Tunis (1983). He obtained his MSc Degree in Energetic from the University of Paris XII (1984). He was awarded his PhD from the same University in Energetic Systems and Energy Management (1987). He Obtained his Habilitation Degree in Energy System from the University of Gabes (2011). His research works cover Industrial refrigeration, Thermo-economic optimization, Power Plants and Renewable Energies.

Energetic and exergetic analysis is performed on a Steam Turbine Power Plant used in a Phosphoric Acid Factory. The power plant is mainly constituted by two steam turbine cycles STGI, STGII and a turbo-blower group Tb-Bl. rnMass, energy and exergy balances are established on the main compounds of the plant. A numerical code is established using EES software to perform the calculations required for the analysis considering real variation ranges of the operating parameters such as pressure, temperature and mass flow rate. The effects of theses parameters on the system performances are investigated.rnThe minimum irreversibility rates are obtained for the condensers (0.5 MW), the deaerators (0.4 MW) and the blower (1.5 MW) followed by the pumps and steam turbines. The heat exchangers present an irreversibility rate of about 5 MW. The maximum energy efficiency is obtained for the blower followed by the heat exchangers, the deaerator and STGII. The exergy efficiency obtained for the heat exchanger, the steam turbine generator, the deaerator and the blower are 88 %, 74 %, 72 % and 66 % respectively. The exergy effeciency of STGI is analyzed taking into account the condensate flow rate. For mass flow rates through the condenser of 12, 18 and 20 t/h. The optimum HP steam flow rates feeding the turbine, leading to the maximum exergetic effeciency are 49, 51 and 56 t/h respectively. rnFor the back pressure steam turbine STGII a maximum exergetic efficiency of about 75.5 % is obtained with of 73 t/h.rn

Dr. Biswajit Dalai has completed his PhD from Utkal University, India. He is working as Assistant Professor in Department of Physics, Eastern Academy of Science and Technology, Bhubaneswar, India. He has published more than 12 papers in reputed journals.

The ultrasonic velocity, density and viscosity of an acidic nuclear extractant namely di (2-ethylhexyl) phosphoric acid (D2EHPA) and its binary mixtures with three monocarboxylic acids viz., acetic, propionic and n-butyric were measured at temperature, T = 303.15 K and at pressure, P = 0.1MPa. The experimental data were utilized to compute relaxation time, molecular association constant, deviations in intermolecular free length, acoustic impedance, free volume and change in entropy, excess Gibb’s energy of activation of viscous flow, excess enthalpy in the entire mole fraction range of D2EHPA. The excess / deviation functions were fitted to Redlich-Kister type polynomial equation to estimate binary coefficients and standard errors between experimental and calculated data. The nature of these functions was utilized to speculate the nature of molecular interaction between component molecules of all studied binary mixtures. Furthermore, 1H NMR spectra of pure D2EHPA and its binary mixtures with the monocarboxylic acids were used to assess molecular interactions between components of liquid mixtures at microscopic level and to corroborate with the results obtained from bulk properties.

Dr. Wassima Yagoubi has completed her PhD from Laghouat University, Algeria. She worked as physics teacher at high school (1988-1995), Algiers, Algeria. She is working as Assistant Professor in Department of Physics, University of Laghouat since 1995 and at ENS of Laghouat (2015), Laghouat, Algeria.

Polyethylene exposure to UV radiation leads to oxidation of the original molecular structure. However, the initial polymerization conditions affect the nature and type of chromophoric structures that are able to develop during the photo-degradation processes that the macromolecularrnstructure of plastic films undergo when exposed outdoors. We describe the examination of the weathering degradation of LDPE (low density polyethylene - locally produced B24/2 and imported LDPE 2100T), supplied by two different manufacturers and processed into films for greenhouse coverings, over several months in a sub-Saharan region of Algeria. The three IR regions most affected by weathering degradation are 800-1100 cm-1, 1680-1800 cm-1 and 3300-3600 cm-1. The IR spectral region most affected by the aging process is the carbonyl region. Oxidation reactions are very complex and result in a variety of products. A more precise identification of all of the carbonylrnspecies remains very difficult because the corresponding signals often overlap. Only by separating their corresponding signals can an exhaustive identification of all of the components be made. Curve fitting combined with derivative spectroscopy revealed that the composite carbonyl band encompasses more than 10 different oxidation products. The most significant among these in terms of absorbance are carboxylic acids, ketones, aldehydes and esters. The oxidation kinetics withrnrespect to the type of LDPE film shows that B24/2 LDPE undergoes less oxidization thanrnLDPE 2100 T. Calculating the concentrations of different carbonyl species compared to theirrnrespective absorbances indicates that the aldehydes are the predominant component ofrnthe final compound, rather than the carboxylic acids.rn