توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Leaching process for extraction of cobalt from spent Co\Al2O3 catalysts
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۵
In this work hydrometallurgical route for processing spent commercial catalysts (Co\Al2O3) are investigated for leaching the Cobalt component. The used catalysts were initially pre–oxidized at 500 °C and 5 h in order to eliminate coke and other volatile species present. Pre–oxidized catalysts were dissolved in solvents such as H2SO4, HNO3, HCl and H2O at 80–90 °C, and the remaining residues separated from the solution. These experiments were performed at different concentrations, presence and absence H2O2 solution. Also effect of reflux on leaching process investigated. The result show the yield of the pre–oxidized catalysts extracted with highly concentration of extractant is higher than non pre–oxidation catalysts and also H2O2 is not effective matter for leaching the cobalt. The reflux system is necessary for avoid from volatile solvent and for environmental and economical aspects. All result showed that H2SO4 is suitable solution for cobalt leaching from the used catalyst in commercial and economical aspects.<\div>

۲Investigation of effective parameters on internal filtration in Fischer–Tropsch synthesis
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۴
Internal filtration is one of the best methods to separate fine solid particles from liquid in industrial plants such as GTL process. In this study, the effects of wax viscosity and the pressure difference between input and output of a sintered metal filter on the filtrate flow rate in a slurry bubble column reactor were investigated. Paraffin and Alumina spheres were used to model the separation of wax and Alumina supported Cobalt catalyst in F–T synthesis. The obtained results showed that by increasing temperature and pressure difference, the filtrate flow rate will increase. Increasing the pressure difference from 0.5 to 1 bar increased the filtrate flow rate 39% at 50˚c and 90% at 70˚c. Also there was about 49% increase in filtrate flow rate increasing the temperature from 50˚c to 60˚c and 13% increase in filtrate flow rate raising the temperature from 60˚c to 70˚c at 0.5 bar pressure difference.<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه