Pervaporation-aided esterification of methanol/acetic acid using cross-linked PVA membrane containing multi-wall carbon nanotubes
Paper ID : 1340-MST2015-FULL
Authors:
Aslan Shameli, Elham Ameri *, Behzad Torabi
Islamic Azad University, Shahreza Branch
Abstract:
A multi-wall carbon nanotubes (MWCNTs) cross-linked PVA membrane was employed in a pervaporation mode to dehydrate the reaction mixture during the esterification of acetic acid with methanol. The nanocomposite membrane was prepared using citric acid as crosslinking agent, and MWCNTs concentration of 2 wt. %. The reaction was carried out in a batch reactor, using Amberlyst 15 as a catalyst with the extent of 15 wt. % relative to acetic acid. Experiments were performed at 1:4 for alcohol-to-acid molar ratio and at temperature of 70 °C. The prepared cross-linked PVA membranes with MWCNTs and without nanoparticles were characterized using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM) analyses. The integration of the chemical reaction with the pervaporation process significantly improved the conversion of the reversible esterification reaction. Compared to around 52% conversion in conventional esterification, up to 99% conversion to methyl acetate was attained from methanol and acetic acid when water by product was shifted by pervaporation using the prepared membrane at the same experimental condition.
Keywords:
Esterification, Membrane reactor, Multi-wall carbon nanotubes, PVA, Methyle acetate
Status : Paper Accepted (Poster Presentation)