Process studies for development of adsorption technology for furfural recovery from waste water

Abstract

Lube refineries in India are facing pollution problems associated with the occasional loss of furfural from their solvent recovery column bottoms in the extraction plant, which constitute both an economic loss and an environmental hazard. Although earlier studies on furfural removal by adsorption on polymeric resins concentrated on equilibrium and kinetic/breakthrough measurements in small diameter columns in the adsorption, the regeneration of the loaded resin adsorbent has not been given adequate attention. This paper focuses on these issues and also includes studies on larger diameter columns with a view to provide data for design of a pilot scale plant for furfural recovery to be set up in a lube complex. The experimental data from adsorption cycle studies indicate that the resin bed is able to treat 28 bed volumes of furfural laden water bringing down the furfural concentration from 500 ppm to less than 10 ppm. The regeneration data indicate the recovery scheme produces an aqueous stream which contains 3% furfural which has to be taken back to the solvent recovery column in the extraction complex. Adsorption and regeneration data have been simulated respectively by the LDF and diffuse wave model.

Performance analysis of aromatic adsorptive resins for the effective removal of furan derivatives from glucose

“…Fargues et al made a thorough comparison based on single component isotherms and breakthrough curves of ion exchange (weak and strong) resins with polymeric adsorbers, all with styrene–DVB based matrices. Although the good furan adsorption on the styrene–DVB resin is consistent with the findings of others, the low adsorption of furans on styrene based anion exchange resins is not consistent with the findings of others . Other research on this subject only examines the effect of adding different resins to the hydrolysate on the effectiveness of the fermentation .…”

“…Several authors showed that these toxins can be removed by adsorption. Polymeric adsorbers, cat‐ and anion exchange resins (weak and strong), zeolites and activated carbon have shown to remove these toxins. Because of regeneration, stability and capacity, polymeric adsorbers (resins), with and without ion exchange groups, are considered most promising for adsorption of these toxins …”

Adsorption kinetics of DowexTM OptiporeTM L493 for the removal of the furan 5‐hydroxymethylfurfural from sugar

“…Other authors studied the desorption using different solvents (e.g. methanol, ethanol, n‐propanol and n‐butanol, acetone) . Although these solvents removed HMF effectively, their strong interaction with the resin, thus introducing another component in the system, is a major drawback.…”

“…methanol, ethanol, n-propanol and n-butanol, acetone). 4,28 Although these solvents removed HMF effectively, their strong interaction with the resin, thus introducing another component in the system, is a major drawback. Increased desorption of HMF at higher temperature indicates that desorption with steam could offer a solution for HMF removal.…”

Degradation of furfural in contaminated water by titanium and iron oxide nanophotocatalysts based on the natural zeolite (clinoptilolite)

“…In these types of reactions, UV (Ultra Violet) irradiation could be used solely or combined with other oxidizing agents and mineral catalysts. Some of these chemical oxidation processes in the degradation of furfural have been reported as e ective in the removal of various chemical complexes [1][2][3][7][8][9].…”