The activity of Mg-Al layered double hydroxides intercalated with nitrogen-containing anions towards the removal of carbon dioxide from natural gas
| Autor: | S. Faramawy, Osama Saber, Ahmed K. Aboul-Gheit, Salah A. Hassan, T. Zaki, A.A.-E. Sakr |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Intercalation (chemistry) Layered double hydroxides Energy Engineering and Power Technology 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Cyanate 01 natural sciences Isocyanate 0104 chemical sciences chemistry.chemical_compound Fuel Technology Adsorption Urea engineering Carbonate 0210 nano-technology Thermal analysis Nuclear chemistry |
| Zdroj: | Journal of Natural Gas Science and Engineering. 54:72-82 |
| ISSN: | 1875-5100 |
| Popis: | Magnesium-aluminum layered double hydroxides (Mg-Al LDH) with different metal concentrations are prepared using homogenous precipitation by urea hydrolysis. Mg-Al LDH are synthesized at temperatures ranging from 80 °C to 100 °C. The results obtained from elemental chemical analysis, X-ray diffraction, Fourier transform infrared spectra, and thermal analysis indicate the presence of intercalated urea-derived anions as well as carbonate in the LDH. The suggested anions may be urea, carbamate, cyanate and/or isocyanate, and carbonate species. The capture of CO2 from the natural gas stream using the synthesized Mg-Al LDH has been performed using dynamic flow system at temperature of 30 °C under atmospheric pressure. The results revealed that the intercalation of nitrogen-containing anions in the LDH structure greatly enhances the adsorption activities for CO2 even at low aluminum content. Under the experimental conditions, the maximum adsorption capacity is 5.07 mmol/g for Mg-Al LDH having 5% Al content and synthesized at 80 °C. |
| Databáze: | OpenAIRE |
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