Pervaporation experiments

A schematic presentation of the pervaporation apparatus is presented in Fig. 37.1. The pervaporation cell was constructed by stainless steel. The feed tank and per-vaporation cell were placed in an incubator to adjust the operation temperature. The effective surface area of the membrane is 28.26 cm2. The membrane was left for swelling in the feed mixture before pervaporation experiments. The membrane was placed on a porous material as a support material. The pressure on the permeate side was measured 0.3 mbar with a vacuum gauge. Permeated vapors were completely condensed in a trap placed in a dewar flask cooled by liquid nitrogen. Two serial traps were established for continuous work. The feed mixture was recirculated by a circulation pump. The permeate and feed compositions were analyzed by refractometer.

Performance of a membrane in pervaporation is characterized by flux (J) and selectivity (a). The separation factor (selectivity) is calculated by using Eq.

where i and j represent the components of MTBE and water, respectively, and y and x represent the weight fractions of MTBE in permeate and feed mixture, respectively. The flux was obtained taking the ratio of the weight of the permeate collected to effective area of membrane and time collection of the sample in kg/m2h. The pervaporation experiments were driven for the different concentrations of feed mixtures.

Fixed Temperature Oven

Fixed Temperature Oven

Pump

Fig. 37.1 Experimental pervaporation setup.

Pump

Fig. 37.1 Experimental pervaporation setup.

Was this article helpful?

0 0
Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

Get My Free Ebook


Post a comment