Polymeric membrane

Typically, crude palm oil contains 500–700 mg/kg of carotenoids and 800 mg/kg of tocopherols. The major carotenoids of palm oil are α- and β-carotenes, which constitute more than 80% of the total carotenoids in palm oil. Membrane technology is being examined as an alternative to conventional oils re

Ultrafiltration separation of an anionic surface active agent belonging to the alkylsulfonate family was studied. Asymmetric membranes made of polyethersulfone, polysulfone, regenerated cellulose, cellulose acetate and polyamide with a molecular weight cut-off equal to 5, 10 and 30 kDa were used. Th

Polysulfone membranes were prepared via the diffusion-induced phase inversion process from casting solutions consisting of polysulfone, dimethyformamide, and polyvinyl pyrrolidone as a polymeric additive. The effect of PVP added in casting solutions was analyzed by measuring the prepared membranes’

It can be expected that a microwave acts as an accelerator of the mobility of polar functional groups such as hydroxyl groups in polymeric membranes, and then gas permeability improves because of the increasing free volume and/or temperature of the membranes. The permeability coefficients of CO2 for

Dimerisation of isobutene is of increasing interest to substitute oxygenated products such as MTBE or the like as fuel additives. Catalysts applied in commercial alkylation plants, e.g., hydrofluoric and sulfuric acid may be replaced by less harmful solid catalysts, for example by solid heteropolyac

This work investigates the hydrogenation of methylenecyclohexane using catalytic membrane reactors. Flat polymeric (PVDF) and tubular ceramic (γ-Al2O3) membranes were prepared and the hydrogenation catalyst, palladium, was deposited into their porous structure. Characterisations were carried out on