Recovery of Acrylic Acid Using Calcium Peroxide Nanoparticles: Thermodynamics and Continuous Column Study

Abstract

The thermodynamic parameters (DGº, DHº, and DSº) for adsorption of acrylic acid on CaO 2 nanoparticle were estimated in the temperature range of 300.15-313.15 K, which helps to evaluate the feasibility of adsorption process, nature of adsorption process, and affinity of adsorbent toward solute molecule. A dynamic adsorption study in a fixed-bed column was performed using CaO 2 nanoparticle for the recovery of acrylic acid from aqueous stream. The breakthrough curves of adsorption system were obtained for different process variables, such as initial acrylic acid concentration (2882-7206 mg L-1), flow rate (5-9 mL min-1), and bed height (10-20 cm). The bed-depth service time model, Thomas model, Yoon-Nelson model, and deactivation kinetic model were applied to the experimental data to predict the column performance. The data were in good agreement with the deactivation kinetic model. The presented results may be useful for the design of adsorption system using nanoparticles, which can be further extended to other systems.

Experimental Study on Reactive Extraction of Malonic Acid with Validation by Fourier Transform Infrared Spectroscopy

“…Several techniques have been employed for the separation of dilute acids from fermentation broth, namely, distillation, ultrafiltration and membrane separation, , ion exchange, adsorption, − electrodialysis, and extraction . Most of these methods have limitations such as being time-consuming and/or energy intensive, producing toxic byproducts, exhibiting low selectivity, and being less effective for dilute solutions.…”