*3.5. Measurement of TODGA Adsorption from a Methanol Solution*

Adsorbent, methanol and TODGA samples weighed on a semi-microbalance were placed into a 40 mL vial, which was sealed, carefully mixed and placed into a liquid thermostat at 313 K for 24 h. Then 2-3 mL of liquid phase samples were collected and filtered through a syringe filter (PTFE with the pore diameter of 0.2 μm). The TODGA concentration in the sample was determined by the SFC method in accordance with the calibration curve prepared in advance. The adsorption was calculated based on the TODGA mass balance between the bulk and adsorbed phases:

$$q = \frac{\left(\mathbb{C}\_0^{TODGA} - \mathbb{C}^{TODGA}\right) \cdot V\_{\text{McOH}}}{m\_0^{ads}} \tag{9}$$

where *CTODGA* <sup>0</sup> and *<sup>C</sup>TODGA* are the TODGA concentrations in methanol at the beginning of the experiment and after the adsorption equilibrium is reached, respectively, *VMeOH* is the methanol volume.
