Adsorption of CO2 on CoII3[CoIII(CN)6]2 using DRIFTS.

摘要: Abstract Adsorption of CO 2 on dehydrated Prussian blue analogue Co II 3 [Co III (CN) 6 ] was studied using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). An peak at 2340 cm −1 assigned to adsorbed identified and used semi-quantitatively construct an isotherm 298 K that followed the Langmuir–Freundlich equation in low-coverage Henry's law limit with pressure below about 25 kPa. Temperature-dependence 6.8 kPa determine Δ H ad  = −23 ± 3 kJ mol , this as well. Deviation from model significant temperatures above attributed primarily a loss reliability DRIFT spectra higher pressures, particularly temperatures, accompanying uncertainties difference when correcting for presence gaseous . Based work, application DRIFTS study adsorption analogues other adsorbents is promising, although range conditions over which it can be applied appears more limited than techniques.