화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.66, No.1, 504-514, 2021
Application of Gas Hydrate for the Treatment of Vinasse: Phase Equilibrium and Kinetic Investigations
One of the major challenges faced by society is dealing with its waste which must be disposed under sustainable waste management regulations. It is, therefore, necessary to find economical avenues for treating and reuse of waste streams such as vinasse. The application of novel technology such as gas hydrate can make the waste treatment process less energy-intensive. Reliable gas hydrate phase equilibrium and kinetic data for CO2 hydrates in the presence of a synthesized vinasse solution were measured using a hydrate benchtop rig. The van der Waals and Plateeuw (vdW-P) solid solution theory, with the UNIQUAC model along with the Debye-Huckel term, was used for the prediction of the hydrate dissociation conditions. The kinetic experiments were performed at initial pressures of 2.60, 2.90, and 3.20 MPa; initial temperatures of 273.1, 274.1, and 275.6 K, and stirrer speeds of 87, 109, and 130 rpm. Results demonstrated that as the initial pressure was increased at a constant temperature, the induction time decreased. In addition, the CO2 hydrate formation rate, apparent rate constant, storage capacity, and water-to-hydrate conversion increased. Similar trends were observed when the initial temperatures were decreased. Lower stirrer speeds result in longer induction times and rate of formation.