Batch industries, specially the fine chemical industry, need rapid and robust mathematical models that can easily predict the degree of separation of mixtures like volatile organic compounds. Otherwise, in the study of on line production scheduling and planning of fine chemical plants, there is a lack of quick but reliable and more accurate than black box models in batch distillation. In this w...

Bioethanol is among the most promising of biofuels because it has an energy content similar to gasoline while generating lower pollutant emissions than gasoline. But, in order to be used as an automotive fuel mixed with gasoline, ethanol must have less than 0.5 wt % of water. To achieve required ethanol purity, in light of the fact that the ethanol water mixture forms an azeotrope, unconvention...

The heat-integrated distillation column to be addressed in this paper is a special distillation column that involves internal heat integration between the whole rectifying and the whole stripping sections. An overview of the research on this process is presented in this work. It covers from the thermodynamic development and evaluations to the practical design and operation investigations for th...

the composition of the essential oils of teucrium chamaedrys l. belongs to the family lamiaceae, it is growing wild in the margin of mountainous roads of arid and cold climate of north iran. in this research, essential oils of teucrium chamaedrys l., extracted and measured at the different location by different methods of distillationand then were analyzed by gc and gc/ms. investigation and com...

Membrane distillation is a process that utilizes differences in vapor pressure to permeate water through a macro-porous membrane and reject other non-volatile constituents present in the influent water. This review considers the fundamental heat and mass transfer processes in membrane distillation, recent advances in membrane technology, module configurations, and the applications and economics...

Batch distillation in a column with a middle vessel can avoid many of the disadvantages associated with the regular batch distillation processes. In this paper we present an experimental investigation of the separation of a zeotropic ternary mixture via total reflux operation and of the separation of an azeotropic binary mixture via batchwise extractive distillation. Moreover, the results obtai...

background: thymus daenensis is on e of the endemic aromatic species in iran that its essential oil is used in food and pharmaceutical industries. objective: in this study, the effects of plant growth stages and distillation methods on essential oil content and thymol percentage of this species were evaluated. methods: the aerial parts of th. daenensis were collected in three stages of plant gr...

Vapour and liquid phases of a simple batch distillation may be separated theoretically at equilibrium at a certain pressure and temperature state. A small separation effect can be achieved by this, because only one equilibrium stage between liquid and vapour phase is thereby realised. Contacting again vapour and liquid flows leaving one single stage in co-current mode, no further separation eff...

The internal corrosion process in refinery environments is one of the major problems faced by hydrocarbon industry, where at least five types are found an oil primary distillation unit. This situation increases with presence high quantities contaminants within crude and processed hydrocarbons. best way to understand know parameters components that affect it apply protection metal exposed. work ...

in this article the effect of fouling on tube side and the overall performance of preheat exchangers of crude distillation unit of petroleum refinery have been investigated. for this purpose the experimental data of australian light crude oil in surface temperature of 200-260oc and the velocity between 0.25 to 0.4 m/s have been used. first, an overall dirty heat transfer coefficient was calcula...