covering large ranges of reactions‚ notably hydrogenations‚ hydrodesulfurisation‚ esterifications and etherification. Various commercial methods for packing heterogeneous catalyst in columns are now available. The systems comprise amongst others: multiple catalyst systems‚ gas and liquid internal recycle traffic over these catalyst systems‚ separation‚ mass flow‚ and enthalpy exchange. These are
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Name: 1. List the three layers of a typical hierarchical design model : Access‚ Distribution‚ Core . 2. Describe the characteristics and the main purpose of the Access Layer: Interface with end devices to provide access to the rest of the network. Is to provide a means of connecting devices to the network and controlling which devices are allowed to communicate on the network. 3. Describe the characteristics and the main purpose of the Distribution Layer: Controls the flow of network traffic using
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AS Chemistry Revision-Chemistry for Life 1. Avagadro constant‚ 6.02 x 10²³ number of particles in 1 mole of a substance 2. Empirical formula-simplest ratio of atoms of each element in a compound 3. 4. Model of an atom Particle Mass on relative atomic scale Charge Proton 1 1+ Neutron 1 0 Electron Very small (0.00055) 1- 5. Radioactive isotopes Radiation What is it? Relative charge How does the nucleus change? Stopped by? Deflection in electric field? Alpha α Helium nuclei ⁴₂He +2 2 fewer
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concentrations‚ poisons the noble metal catalysts platinum and rhenium in the catalytic reforming units that are subsequently used to upgrade the of the naphtha streams . Most metals in catalysis HDS is those at the middle of the transition metal series that are most active. Ruthenium disulfide appears to be the single most active catalyst‚ but binary combinations of cobalt and molybdenum are also highly active. Aside from the basic cobalt-modified catalyst‚ nickel and tungsten are also used‚ depending
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forces that are coming together and the reaction is the aftermath of the collision. 5. Catalysts are the ultimate starting point of the reaction. It’s like the red light turning green! The green light is the catalyst to everyone proceeding in traffic. Catalysts are the lower versions of activation energies. The collisions can be a lot more successful and quicker‚ with lower activation energy‚ which is the catalyst.
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Solms English The Witches are The Most Powerful and Catalyst To Macbeths Crimes In this essay I will be discussing whether I believe the witches are the most powerful and catalyst to Macbeths evil doings. I will explain in three reasons what I believe as well as rebuttals to my opinion. I believe that the witches are the most powerful characters in the play and the catalyst of all of Macbeth’s crimes. Firstly I believe they are the most powerful because they
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How fast is your reaction? Part 1 – How temperature affect the rate of reaction Chemical equation Magnesium + hydrochloric acid → magnesium chloride + hydrogen Mg + 2HCL → MgCl2 + H2 Graph Conclusion and questions 1. What factors/variables did you keep the same in this experiment? * We kept the same volume of hydrochloric acid (10 cm3) and the magnesium ribbon (5cm) because that way we could get a fair test experiment. We also repeated
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Bato Balani Journal #1 p. 8 1. How was the first quasicrystal discovered? - The quasicrystal was discovered while Daniel Shechtman was experimenting on a chilled molten mixture of aluminium and manganese which revealed a 10-fold symmetry. 2. Compare crystals and quasicrystals. - the crystal‚ the patterns are tightly packed‚ they have no space in between‚ and look the same in whatever angle. And the quasicrystal‚ the atoms exhibit a regular pattern‚ but the pattern is not repeated. 3. What are
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nanozeolite was reacted in an oil bath at 100 oC for the appropriated times. Completion of the reaction was indicated by TLC. After completion of reaction‚ the mixture was cooled to room temperature. The solid residue was dissolved in hot ethanol and the catalyst filtered off. The filtrate solution was concentrated and the solid product was recrystallized in aqueous EtOH (70%) to give pure products. Selected spectra: 3 -(2′-benzothiazolo)-2‚3-dihydro-2-(4-chlorophenyl)-quinazolin-4(1H)-ones ( Table 1 Entry
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Synthesis of Butyl Benzoate Using Phase Transfer Catalysis The objective of the experiment is to synthesize the butly benzoate by nucleophilic substitution and characterize it by IR spectroscopy. The percent yield of the final product is determined after the synthesis. Procedures: 2.0 mL of 1-bromobutane‚ 3.0 g of sodium benzoate‚ 5.0 mL of water‚ 4 drops of Aliquat 336‚ and a boiling stone were placed in a 50mL round-bottomed flask. The reaction mixture was refluxed for 1 hour and the flask
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