Jump to content
Chemical Engineering Community

Arun Gupta

Members
  • Content count

    32
  • Joined

  • Last visited

  • Days Won

    37

Arun Gupta last won the day on September 6

Arun Gupta had the most liked content!

5 Followers

About Arun Gupta

  • Rank
    Advanced Member
  • Birthday February 10

Recent Profile Visitors

645 profile views
  1. question

    im stuck in one question , can anyone help me out ??? Problem Description Normal butane, C4H10, is to be isomerized to isobutane in a plug-flow reactor. This elementary reversible reaction is to be carried out adiabatically in the liquid phase under high pressure using a liquid catalyst which gives a specific reaction rate of 31.1 h-1 at 360 K. The feed enters at 330 K. Calculate the PFR volume necessary to process 100,000 gal/day (160 kmol/h) at 70% conversion of a mixture 90 mol % n-butane and 10 mol % of i-pentane, which is considered an inert. Plot and analyze X, Xe, T and -rA down the length of the reactor Calculate the CSTR volume for the same conditions as the PFR
  2. ASPEN+

    what is basic difference b/w ASPEN + and ASPEN HYSYS ??
  3. ASPEN+

    Aspen Plus is the market-leading chemical process optimization software used by the bulk, fine, specialty, & biochemical industries, as well as the polymers industry for the design, operation, and optimization of safe, profitable manufacturing facilities.
  4. Why baffles are used in reactors?

    The ideal CSTR model assumes that the fluid in the reactor is perfectly mixed, and that there are no concentration gradients inside the reactor. However, in a real-world stirred tank reactor, you won't have perfect mixing and there will be concentration gradients present. The baffles contribute additional disturbance to the flow created by the mixer, and provide more effective mixing. So, including the baffles brings you closer to the ideal of perfect mixing
  5. Chemical Kinetics

    Version 1.0.0

    170 downloads

    Chemical kinetics is the study and discussion of chemical reactions with respect to reaction rates, effect of various variables, re-arrangement of atoms, formation of intermediates etc. There are many topics to be discussed, and each of these topics is a tool for the study of chemical reactions.
  6. petroleum

  7. Distillation

    Version 1.0.0

    708 downloads

    Distillation is a widely used method for separating mixtures based on differences in the conditions required to change the phase of components of the mixture. To separate a mixture of liquids, the liquid can be heated to force components, which have different boiling points, into the gas phase. The gas is then condensed back into liquid form and collected. Repeating the process on the collected liquid to improve the purity of the product is called double distillation. Although the term is most commonly applied to liquids, the reverse process can be used to separate gases by liquefying components using changes in temperature and/or pressure. A plant that performs distillation is called a distillery. The apparatus used to perform distillation is called a still. Distillation.mp4
  8. Version 1.0.0

    37 downloads

    A novel orange peel adsorbent developed from an agricultural waste material was characterised and utilised for the removal of Remazol Brilliant Blue from an artificial textile-dye effluent. The adsorption thermodynamics of this dye-adsorbent pair was studied in a series of equilibrium experiments. The time to reach equilibrium was 15 h for the concentration range of 30 mg L-1 to 250 mg L-1. The adsorption capacity decreased with increasing temperature, from 9.7 mg L-1 at 20 °C to 5.0 mg L-1 at 60 °C. Both the Langmuir and Freundlich isotherm models fitted the adsorption data quite reasonably. The thermodynamic analysis of dye adsorption onto the orange peel adsorbent indicated its endothermic and spontaneous nature. Thus, the application of orange peel adsorbent for the removal of dye from a synthetic textile effluent was successfully demonstrated.
  9. Outstanding properties of teflon:- Uses of Teflon and Properties 1. Chemicals includes ozone,chlorine,acetic acid ammonia,sulphuric acid and hydrochloric acid. The coatings are affected by molten alkali metals and highly reactive fluorinating agents. 2. It is weather and UV resistant Teflon 3. It has excellent optical properties 4. It is non stick Very few solid substances can permanently stick to a Teflon coating, where as tacky materials may show some adhesion, almost all substances release easily from the coating. 5. It has outstanding performance at extreme temperatures. Teflon can temporarily withstand temperatures of 260C and cryogenic temperatures of -240C and will then also have the same chemical properties.It has an initial melting point of 342C (+- 10C) temperature. 6. It has low coefficient of friction. Coefficient of friction is the ratio of the force required to make two surfaces slide over each other. A low coefficient of friction equals low resistance and smooth operation. Thus there is no difficulty in sliding one surface against another. The coefficient of friction of Teflon is generally in the range of 0.05 to 0.20, depending on the load, sliding speed, and type of Teflon coating used. 7. Teflon finishes are both hydrophobic and oleophobic, which makes cleanup easier and more thorough. 8. Over many different frequencies, low dissipation factor and high surface resistivity teflon has a high dielectric strength. The high voltage that the insulating material can withstand before it breaks down is its dielectric strength . In addition to it teflon has a low dissipation factor; that is the percentage of electrical energy absorbed and lost when current is applied to an insulating material. A low dissipation factor indicates that the absorbed energy dissipated as heat is low.The high surface resistivity indicates the electrical resistance between opposite edges of an unit square on the surface of an insulating material. Uses of Teflon:- The various market applications of Teflon include : Computer pin belt 1. In electronics industry it is used on account of its insulation property in wires and system components.Also used because of its outstanding electrical performance and durability. Uses for coating 2. Used for metal finishing, paints and coatings,as flour additives can be added to reduce the wear and tear on load-bearing surfaces. For example in inks and lithographic printing, thermoplastics and molded gears, protective industrial surfaces, lubricants to thicken, sterile packaging, etc. Uses as automobile air bags 3. In optical devices, as it can be used as clear coating, requiring a low refractive index and still perform in aggressive chemical environments over a wide range of use temperatures and light waves (UV-IR). For example, it is found in lightweight surgical lamps, photovoltaic cell glazing, etc. 4. In automobiles it finds its uses as airbag systems, fuel hose permeation barrier, fuel system, chassis, brake systems, oil filter, etc. 5. Used as nonstick coating on cooking devices like pans, oven , tawa as it is nonstick and exceptional performance at high temperatures.
  10. Cement Technology

    Version 1.0.0

    865 downloads

    The course content will be suitable for a wide range of personnel within a cement manufacturing company including junior/middle management, technicians, production and control room staff, etc and also for others who wish to gain a comprehensive understanding of the complete cement manufacturing process.
  11. What is the Arrhenius equation used for?

    this explains well http://www.chemguide.co.uk/physical/basicrates/arrhenius.html
  12. BOILER

    Version 1.0.0

    259 downloads

    A boiler is an enclosed vessel that provides a means for combustion and transfers heat to water until it becomes hot water or steam. The hot water or steam under pressure is then usable for transferring the heat to a process. Water is a useful and cheap medium for transferring heat to a process. When water is boiled into steam its volume increases about 1,600 times, producing a force that is almost as explosive as gunpowder. This causes the boiler to be extremely dangerous equipment and should be treated carefully.Liquid when heated up to the gaseous state this process is called evaporation. The heating surface is any part of the boiler; hot gasses of combustion are on one side and water on the other. Any part of the boiler metal that actually contributes to making steam is heating surface. The amount of heating surface of a boiler is expressed in square meters. The larger the heating surface a boiler has, the more efficient it becomes.
  13. Fuel And Combustion

    Version 1.0.0

    118 downloads

    The various types of fuels like liquid, solid and gaseous fuels are available for firing in boilers, furnaces and other combustion equipments. The selection of right type of fuel depends on various factors such as availability, storage, handling, pollution and landed cost of fuel. The knowledge of the fuel properties helps in selecting the right fuel for the right purpose and efficient use of the fuel. The following characteristics, determined by laboratory tests, are generally used for assessing the nature and quality of fuels.
  14. Chemical Process

    I just completed this quiz. My Score 40/100 My Time 261 seconds  
  15. Stoichiometry

    I just completed this quiz. My Score 50/100 My Time 351 seconds  
×

View My Stats