Common use of Methodological approach Clause in Contracts

Methodological approach. The structure and crystallinity of the zeolites were determined by X-ray powder diffraction using a Bruker AXS D8 Advance diffractometer equipped with a graphite monochromator and a position sensitive detector Våntec-1 using CuKα radiation in ▇▇▇▇▇–▇▇▇▇▇▇▇▇ geometry. Nitrogen adsorption/desorption isotherms were measured on a Micromeritics GEMINI II 2370 volumetric Surface Area Analyzer at -196 °C to determine surface area, pore volume and pore size distribution. Before the sorption measurements, all samples were degassed in a Micromeritics FlowPrep 060 instrument under helium at 300 °C (heating rate 10 °C/min) for 4 h. The specific surface area was evaluated by BET method using adsorption data in the range of a relative pressure from p/p0 = 0.05 to p/p0 = 0.25. The t-plot method was applied to determine the volume of micropores (Vmic). The adsorbed amount at relative pressure p/p0= 0.98 reflects the total adsorption capacity (Vtot). The concentration and the type of acid sites were determined by adsorption of acetonitrile as a probe molecule followed by FTIR spectroscopy (Nicolet 6700 FTIR with DTGS detector) using the self- supported wafer technique. Prior to adsorption of the probe molecule, self-supported wafers of zeolite samples were activated in-situ by overnight evacuation at temperature 450 °C. CD3CN adsorption proceeded at room temperature for 30 min at equilibrium pressure 5 Torr, followed by 30 min degassing at room temperature. To obtain quantitative analysis, the molar absorption coefficients for CD3CN adsorbed on Brønsted acid sites (ν(C≡N)-B at 2297 cm-1, ε(B) = 2.05 ± 0.1 cm μmol-1) and strong and weak ▇▇▇▇▇ acid sites (ν(C≡N)-L1 at 2325 cm-1 ν(CN)-L2 2310 cm-1, ε(L) = 3.6 ± 0.2 cm μmol-1) were used. Integral intensities of individual bands were used and spectra were normalized to the wafer thickness 10 mg cm-2. The Iso-Therm thermostat (e-Lab Services, Czech Republic) maintaining temperature of the sample with accuracy of ± 0.01 K was used for the measurement of carbon dioxide adsorption at temperatures from 273 K to 333 K. After argon adsorption measurement, adsorption isotherms of CO2 were subsequently recorded on the same sample at temperatures 273 K, 293 K, 313 K and 333 K. The exact temperature was determined using a platinum resistance thermometer. Zeolites were degassed before each measurement at 473 K (temperature ramp of 1 K min-1) under turbomolecular pump vacuum overnight.

Methodological approach. The structure and crystallinity of the zeolites were determined by X-ray powder diffraction using a Bruker AXS D8 Advance diffractometer equipped with a graphite monochromator and a position sensitive detector Våntec-1 using CuKα radiation in ▇▇▇▇▇–▇▇▇▇▇▇▇▇ geometry. Nitrogen adsorption/desorption isotherms were measured on a Micromeritics GEMINI II 2370 volumetric Surface Area Analyzer at -196 °C to determine surface area, pore volume and pore size distribution. Before the sorption measurements, all samples were degassed in a Micromeritics FlowPrep 060 instrument under helium at 300 °C (heating rate 10 °C/min) for 4 h. The specific surface area was evaluated by BET method using adsorption data in the range of a relative pressure from p/p0 = 0.05 to p/p0 = 0.25. The t-plot method was applied to determine the volume of micropores (Vmic). The adsorbed amount at relative pressure p/p0= 0.98 reflects the total adsorption capacity (Vtot). The concentration and the type of acid sites were determined by adsorption of acetonitrile as a probe molecule followed by FTIR spectroscopy (Nicolet 6700 FTIR with DTGS detector) using the self- self-supported wafer technique. Prior to adsorption of the probe molecule, self-self- supported wafers of zeolite samples were activated in-situ by overnight evacuation at temperature 450 °C. CD3CN adsorption proceeded at room temperature for 30 min at equilibrium pressure 5 Torr, followed by 30 min degassing at room temperature. To obtain quantitative analysis, the molar absorption coefficients for CD3CN adsorbed on Brønsted acid sites (ν(C≡N)-B at 2297 cm-1, ε(B) = 2.05 ± 0.1 cm μmol-1) and strong and weak ▇▇▇▇▇ acid sites (ν(C≡N)-L1 at 2325 cm-1 ν(CN)-L2 2310 cm-1, ε(L) = 3.6 ± 0.2 cm μmol-1) were used. Integral intensities of individual bands were used and spectra were normalized to the wafer thickness 10 mg cm-2. The Iso-Therm thermostat (e-Lab Services, Czech Republic) maintaining temperature of the sample with accuracy of ± 0.01 K was used for the measurement of carbon dioxide adsorption at temperatures from 273 K to 333 K. After argon adsorption measurement, adsorption isotherms of CO2 were subsequently recorded on the same sample at temperatures 273 K, 293 K, 313 K and 333 K. The exact temperature was determined using a platinum resistance thermometer. Zeolites were degassed before each measurement at 473 K (temperature ramp of 1 K min-1) under turbomolecular pump vacuum overnight.