PROBLEM STATEMENT: Petroleum hydrocarbons, and other volatile organic compounds (VOCs), which are found to contaminate groundwater and soils, are usually treated by pump-and-treat methods, which are very time-consuming, expensive, and not very effective. We are proposing the use of pervaporation for effectively removing these hydrocarbons and VOCs from contaminated soil and groundwater (with or...

An easily automatable sequential flow-injection-pervaporation method is proposed for the photometric determination of methanol and iron in vinegar. The method is based on separation of the methanol from the sample matrix by pervaporation followed by its oxidation to formaldehyde with permanganate, decolouration of the latter with S(2)O(5)(2-), and subsequent reaction of formaldehyde with p-rosa...

The production of biobutanol is hindered by the product's toxicity to the bacteria, which limits the productivity of the process. In situ product recovery of butanol can improve the productivity by removing the source of inhibition. This paper reviews in situ product recovery techniques applied to the acetone butanol ethanol fermentation in a stirred tank reactor. Methods of in situ recovery in...

A mathematical model considering mass and momentum transfer was developed for simulation of ethanol dewatering via pervaporation process. The process involves removal of water from a water/ethanol liquid mixture using a dense polymeric membrane. The model domain was divided into two compartments including feed and membrane. For a description of water transport in ...

mfi zeolite membranes were prepared on porous α-alumina substrates, using secondary growth of nano-seeded layers. the resulting membranes were characterized by means of scanning electron microscopy (sem), x-ray diffractometry (xrd), and pervaporation performance tests for separation of benzene, toluene and xylene (btx) mixture from contaminated water. the morphology, thickness, homogeneity, cry...

Biodiesel production through chemical interesterification of triglycerides requires an excess methyl acetate that must be recovered once the reaction is finished and catalyst neutralized. The present study concerns with purification by pervaporation. PERVAP 2201 was chosen as pervaporation membrane due to its high hydrophilic character makes it suitable for elimination water in acetate. Runs we...

Organizing nanoparticles (NPs) into periodic structures is a central goal in materials science. Despite progress the last decades, it still challenging to produce macroscopic assemblies reliably. In this work, analysis of pervaporation-induced organization gold octahedra supercrystals within microfluidic channels using combination X-ray scattering techniques and FIB-SEM tomography reported. The...

We explore air invasion in an initially water-filled dead-end compliant microchannel containing a constriction. The phenomenon is driven by the pervaporation of liquid present channel through surrounding medium. penetration intermittent, jerky, and characterised stop-and-go dynamics as bubble escapes demonstrate that this sequence arrest jump due to elastocapillary coupling between air-liquid i...