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Showing content with the highest reputation since 08/20/2018 in all areas

  1. 1 point
    James Eric

    Introductions!

    My name is james eric. I am pursuing bachelors in Chemical Engineering at akwa ibom state University. I just finished my fourth year. I just started using AutoCAD . I am looking forward to learning a lot from fellow club members.
  2. 1 point
    Whose efficiency is better?
  3. 1 point
    admin

    Vinyl Chloride from Ethylene

    From the album: Process Flow Diagrams

    Introduction • Vinyl chloride is produced in a two step process from ethylene. • Ethylene first reacts with Chlorine to produce Ethylene dichloride. • The purified Ethylene dichloride undergoes selective cracking to form vinyl chloride. • We first present the process technology associated to Ethylene Chloride . Reactions • C2H4 + Cl2 → C2H4Cl2 • Undesired products: Propylene dichloride and Polychloroethanes. • Reaction occurs in a liquid phase reactor with ethylene dichloride serving as the liquid medium and reactants reacting the liquid phase. • Catalyst is FeCl3 or Ethylene dibromide. Process Technology • C2H4 and Cl2 are mixed and sent to the liquid phase reactor. • Here, the feed mixture bubbles through the ethylene dichloride product medium. • Reactor operating conditions are 50°C and 1.5 – 2 atms. • The reaction is exothermic. Therefore, energy is removed using either cooling jacket or external heat exchanger. • To facilitate better conversion, circulating reactor designs are used. • FeCl3 traces are also added to serve as catalyst. • The vapour products are cooled to produce two products namely a vapour product and a liquid product. The liquid product is partially recycled back to the reactor to maintain the liquid medium concentration. • The vapour product is sent to a refrigeration unit for further cooling which will further extract ethylene dichloride to liquid phase and makes the vapour phase bereft of the product. • The liquid product is crude ethylene dichloride with traces of HCl. Therefore, acid wash is carried out first with dilute NaOH to obtain crude ethylene dichloride. A settling tank is allowed to separate the spent NaOH solution and crude C2H4Cl2 (as well liquid). • The crude ethylene dichloride eventually enters a distillation column that separates the ethylene dichloride from the other heavy end products. • The vapour phase stream is sent to a dilute NaOH solution to remove HCl and produce the spent NaOH solution. The off gases consist of H2, CH4, C2H4 and C2H6.
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  5. 1 point

    From the album: Process Flow Diagrams

    Kvic model (Floating Drum Model) It consists of a deep well shaped underground digester connected by inlet and outlet pipes . a mild steel gas storage drum, inverted over the slurry goes up and down around a guide pipe corresponding to the accumulation and withdrawal of gas. Benefits: ○Capacity to maintain steady pressure of biogas by the movement of gas holder ○Inbuilt provision for scum breaking ○Volume of gas is known just by observing the position of the drum
  6. 1 point
    admin

    Fixed dome type bio-gas plant

    From the album: Process Flow Diagrams

    Fixed Dome The main feature of this design is that the digester and gas holder are the part of composite unit made of brick masonry. It has a cylindrical digester with dome shaped roof and large inlet and outlet tank. Advantages: ○The plant is cheaper than the floating drum plants by 20-30%




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