An Experimental Study of Membrane Contactor Modules for Recovering Cyanide through a Gas Membrane Process
| Autor: | Elizabeth Troncoso, Sicely Valetto, Simón Díaz-Quezada, Lorena Barros, René Ruby-Figueroa, Michelle Quilaqueo, Gabriel Seriche, Humberto Estay |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Cyanide gas membrane process Extrapolation Filtration and Separation 02 engineering and technology lcsh:Chemical technology Stripping (fiber) Article Membrane technology chemistry.chemical_compound 020401 chemical engineering cyanide recovery Mass transfer Chemical Engineering (miscellaneous) lcsh:TP1-1185 lcsh:Chemical engineering 0204 chemical engineering Process engineering Contactor business.industry Process Chemistry and Technology scaling-up lcsh:TP155-156 021001 nanoscience & nanotechnology Membrane chemistry Hollow fiber membrane membrane modules 0210 nano-technology business |
| Zdroj: | Membranes Volume 10 Issue 5 Membranes, Vol 10, Iss 105, p 105 (2020) |
| ISSN: | 2077-0375 |
| Popis: | Cyanide is one of the main reagents used in gold mining that can be recovered to reduce operational costs. Gas membrane technology is an attractive method for intensifying both the stripping and absorption processes of valuable compounds, such as cyanide. However, scaling-up this technology from laboratory to industry is an unsolved challenge because it requires the improvement of the experimental methodologies that replicate lab-scale results at a larger scale. With this purpose in mind, this study compares the performance of three different hollow fiber membrane contactor modules (1.7 × 5.5 Mini Module, 1.7 × 10 Mini Module, and 2.5 × 8 Extra Flow). These are used for recovering cyanide from aqueous solutions at laboratory scale, using identical operational conditions. For each experimental set-up, mass-transfer correlations at the ranges of feed flows assayed were determined. The modules with the smallest and largest area of mass transfer reached similar cyanide recoveries (> 95% at 60 min), which demonstrate the impact of module configuration on their operating performance. The results obtained here are limited for scaling-up the membrane module performance only because operating modules with the largest area results in a low Re number. This fact limits the extrapolation of results from the mass-transfer correlation. |
| Databáze: | OpenAIRE |
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