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Flow regimes in wet conical spouted beds using glass bead mixtures

Particuology 2008年第2期6卷 72-80页

作者： Marcelo S.Bacelos Jos Teixeira Freire Universidade Federal de Sāo Carlos Centro de Ciências Exatas e de TecnologiaPrograma de Pós-Graduacāo em Engenharia QuímicaCentro de Secagem de PastasSuspensōes e SementesRod.Washington LuizKm 23513565-905CP 676Sāo CarlosSPBrazil

Using a high-viscosity Newtonian fluid, glycerol, an experimental investigation was carried out to evaluate the stable spouting regime in conical spouted beds using four particle mixtures： a reference （monoparticles）, a binary mixture, two ternary mixtures with flat and Gaussian distributions respectively. The mixtures were selected for particle diameters （dp） ranging from 1.09 to 4.98 mm and particle diameter ratios （dpL/dps） ranging from 1.98 to 4.0. Experimental data show that pressure fluctuation signals of the bed, as indicated by changes in their standard deviations, provide suitable information to identify the range of operational conditions for stable spouting. However, the analysis of skewness of curves of pressure fluctuation as a function of air velocity appears not sufficient to identify a particular flow regime. For glycerol in the spouting regime, the standard deviation is noted to increase with increasing glycerol concentration due to the growth of interparticle forces. The implications of these research findings on the drying of suspensions in conical spouted beds using glass bead mixtures are also discussed.

关键词： Conical spouted bed binary and ternary mixtures Processing of pastes Spouting regimes Spouting stability Pressure fluctuation

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Presenting decision tree for best mixing rules and Z-factor correlations and introducing novel correlation for binary mixtures

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Petroleum 2016年第3期2卷 289-295页

作者： Mohamad Mohamadi-Baghmolaei Reza Azin Zeinab Zarei Shahriar Osfouri Department of Chemical Engineering Faculty of PetroleumGas and Petrochemical EngineeringPersian Gulf UniversityBushehrIran Department of Petroleum Engineering Faculty of PetroleumGas and Petrochemical EngineeringPersian Gulf UniversityBushehrIran

The significance of gas compressibility factor in petroleum engineering encourages the researchers to employ the most accurate and precise methods for estimation of this ***,empirical correlations due to their simplicity have been referred more than other approaches for prediction of *** is no clear and reliable report to address an appropriate combination of correlation and mixing rule for each type of *** the present study,combination of several empirical correlations and mixing rules is examined and a decision tree is constructed to suggest best combination for each gas *** this reason,2329 experimental data were used for *** to the results,LelandeMueller mixing rule/Sanjari and Lay correlation is the best combination for sour and natural ***,Van NesseAbbot mixing rule/HalleYarborough correlation,StewarteBurkhardteVoo mixing rule/Heidarian correlation and SattereCampbell mixing rule/Papay correlation are the most appropriate combination for gas condensate,binary and ternary mixtures *** binary mixtures,a robust and novel empirical correlation was developed based on Kay mixing rule to estimate *** results employed how good the new correlation is in agreement with the experimental data with significant R-squared 0.9843.

关键词： Z-factor Mixing rules Empirical correlations binary and ternary mixtures

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