The first series of hydrolysis experiments (see Figure and 75 ˚C) with a help of thermostat (8) whose circulation loop was connected to the jacket of the flask . The temperature of the reaction solution was measured using a K-type thermocouple (9) inserted inside the flask through one of its necks. Once the desired temperature was reached and the reactor with the solution was flushed with hydrogen (5), the sample (2; m=200 mg) was added to the reactor flask through its centre neck. Hydrogen generated in the reactor (1) during the hydrolysis reaction flowed through the outlet pipe (4), moisture trap (10; a tube filled with CaCl2 granules), thermal mass flowmeters (6a; Bronkhorst, EL-FLOW series) and then released into atmosphere . Correct measurements of the flow of hydrogen released during hydrolysis reaction pose a certain problem due to high H2 flow at the beginning of the reaction and its subsequent quick drop afterwards. From the other hand, the readings of thermal mass flowmeters at gas flows below ~10% of their full scale become inaccurate that may introduce high systematic error at the end of hydrolysis process. We mitigated this problem by using two individually calibrated mass flowmeters (1 and 10 Nl/min full scale) connected in series that allowed us to measure flow rate of the released hydrogen in the range 0.1-10 Nl/min. The data logging was interrupted after the readings of the flow measurement system dropped below the lower limit of the "trustable" range specified above (as a rule, after 8-11 minutes from starting the process).