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Saint-Sauveur-en-Rue, France

Mehrpooya M.,University of Tehran | Mohammadi A.H.,Center Energetique et Procedes | Richon D.,Center Energetique et Procedes
Industrial and Engineering Chemistry Research

In this communication, we report an extended artificial neural network algorithm to estimate sulfur content of sour/acid gases. The main advantage of this algorithm is that it eliminates any need for characterization parameters, due to the tendency of sulfurs to react, required in thermodynamic models. To develop this tool, reliable experimental data found in the literature on sulfur content of various gases are used. To estimate the sulfur content of a gas, the information on temperature, pressure, gravity of acid gas free gas, and the concentrations of hydrogen sulfide and carbon dioxide in the gas are required. The developed algorithm is then used to predict independent experimental data (not used in its development). It is shown that the artificial neural network algorithm can be used as an efficient tool to estimate sulfur content of various gases. © 2010 American Chemical Society. Source

Rivera-Tinoco R.,Center Energetique et Procedes | Bouallou C.,Center Energetique et Procedes
Journal of Cleaner Production

In this work we present the experimental results of absorption rates and absorption capacity for the CO2 absorption by ammonia (NH3) aqueous solutions. Experiments are carried out in a thermoregulated Lewis-type cell reactor and are achieved in temperature and concentration ranges of 278-303 K and 2-5wt.% NH3 respectively. The obtained values for absorption kinetic rates and absorption capacity are compared with those available for alkanolamine solvents, commonly used to absorb CO2. In order to achieve this comparison, data available in studies about alkanolamine solvents at 303-333 K and 5-50wt.% for alkanolamines solutions were considered. Results show that CO2 absorption by NH3 is faster than the one carried out by MDEA, except for 2wt.% NH3 at 288 K. At 278 K and using aqueous solutions of 3wt.% NH3, the absorption rate is almost identical to the one reached with MDEA solvent. The highest absorption capacity, also compared with alkanolamine solution, is reached with aqueous solutions of 5wt.% NH3 at 278 K and 303 K. © 2010. Source

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