Artículo
Physicochemical comparison of precipitated calcium carbonate for different configurations of a biogas upgrading unit
Autor/es | Baena Moreno, Francisco Manuel
Price, Cameron A. H. Le Saché, Estelle Pastor Pérez, Laura Sebastiá Sáez, Daniel Ramírez Reina, Tomás |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Química y Ambiental |
Fecha de publicación | 2019 |
Fecha de depósito | 2022-09-28 |
Publicado en |
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Resumen | BACKGROUND:Thispaperpresentsaphysicochemicalcomparisonofthesolidproductsobtainedfromtwoalternativeprocessesthatrecyclewastesodiumcarbonate(Na2CO3)solution,whichisproducedfollowingtheabsorptionofCO2inabiogasupgradingunit. ... BACKGROUND:Thispaperpresentsaphysicochemicalcomparisonofthesolidproductsobtainedfromtwoalternativeprocessesthatrecyclewastesodiumcarbonate(Na2CO3)solution,whichisproducedfollowingtheabsorptionofCO2inabiogasupgradingunit.Chemicalregenerationprocessesofferanattractivealternativetotheenergeticallydemandingstandardphysicalmethods.In the first process, sodium hydroxide (NaOH) is regenerated as a precipitate from the chemical reaction of Na2CO3with calciumhydroxide (Ca(OH)2).Thesecondprocessshowsapathtoobtainavaluablesodiumchloride(NaCl)andcalciumcarbonate(CaCO3)rich brine from calcium chloride (CaCl2) acting as a precipitant agent. In both processes, precipitated calcium carbonate (PCC) isobtained as the most valuable by-product, but with varying properties owing to the different origin.RESULTS: The purpose of this work is to analyze physicochemically both variations of PCCs obtained and examine the differencesbetween these solid samples in order to determine which method produces more desirable characteristics in the final product.To this end, Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) and scanning electronmicroscopy (SEM) were employed as characterization methods. The results reflect that both PCCs have a calcite crystal structure,or morph, being as both PCC products originate from CaCl2that is more similar to commercial calcium carbonate calcite.CONCLUSION: These results confirmed that a pure CaCO3valuable by-product can be obtained from a biogas upgrading unitwith several industrial applications. |
Agencias financiadoras | Universidad de Sevilla Engineering and Physical Sciences Research Council (EPSRC). UK. Royal Society (UK) CO2Chem. UK Ayuntamiento de Sevilla Corporación Tecnológica de Andalucía (CTA). España. |
Identificador del proyecto | V PPIT-US
EPSRC EP/R512904/1 RSGR1180353 EPSRC EP/P026435/1 EMASESA NURECCO2 |
Cita | Baena Moreno, F.M., Price, C.A.H., Le Saché, E., Pastor Pérez, L., Sebastiá Sáez, D. y Ramírez Reina, T. (2019). Physicochemical comparison of precipitated calcium carbonate for different configurations of a biogas upgrading unit. Journal of Chemical Technology and Biotechnology, 94 (7), 2256-2262. |
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