Synthesis of Zn–Al LDHs intercalated with urea derived anions for capturing carbon dioxide from natural gas
Journal of the Taiwan Institute of Chemical Engineers, 2013•Elsevier
Zinc–aluminum layered double hydroxides (Zn–Al LDHs) with different Zn/Al ratios (Zn/Al= 6,
3 and 2) were prepared using a homogenous precipitation method by urea hydrolysis. The
preparation was performed at various temperatures (70–100° C). The element chemical
analysis, X-ray powder diffraction and Fourier transform infrared spectra show that urea
species and cyanate anions are the main anions intercalated at low temperature and low
Zn/Al ratios. This was confirmed by pH curves recorded during the reaction, thermal …
3 and 2) were prepared using a homogenous precipitation method by urea hydrolysis. The
preparation was performed at various temperatures (70–100° C). The element chemical
analysis, X-ray powder diffraction and Fourier transform infrared spectra show that urea
species and cyanate anions are the main anions intercalated at low temperature and low
Zn/Al ratios. This was confirmed by pH curves recorded during the reaction, thermal …
Abstract
Zinc–aluminum layered double hydroxides (Zn–Al LDHs) with different Zn/Al ratios (Zn/Al = 6, 3 and 2) were prepared using a homogenous precipitation method by urea hydrolysis. The preparation was performed at various temperatures (70–100 °C). The element chemical analysis, X-ray powder diffraction and Fourier transform infrared spectra show that urea species and cyanate anions are the main anions intercalated at low temperature and low Zn/Al ratios. This was confirmed by pH curves recorded during the reaction, thermal analyses, temperature programmed desorption.
The presence of intercalated urea and cyanate species creates UV absorption activities for the ZA15-80 and ZA35-80 samples and enhance the selectivity of ZA15-80 toward the adsorption of carbon dioxide from natural gas.
Elsevier
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