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Thiocyanate ions can be removed from sodium carbonate/bicarbonate solution that is used for oxidative scrubbing of H2S using a moderately basic anion exchange resin (see US 4,999,113). The flow rate of the scrubbing solution is 40 m3 /h and the initial concentration of thiocyanate is 10 g/l. A polystyrene-based anion exchange resin suitable for this duty has capacity of 1.8 eq/L. The resin can be regenerated by flushing 1.5 equivalents of 4.0 wt% NaOH, preceded by the same volume of water. Two beds are used, with one in operation and one in regeneration. If the bed is designed to be 80% loaded at the end of a 2 hour operation cycle, estimate the bed volume. Also determine the flow rate of sodium hydroxide required during the regeneration.
Propane in the feed to the unit and 80% of the pentane fed to the unit. The mole fraction of butane in the distillate is yB ? 0.4 . The bottom stream contains all of the hexane fed to the unit. Calculate the distillate and bottoms streams flow rate a..
Calculate the work done in the isothermal reversible expansion of one mole of CH4 (g) from 1.00 dm3 to 10.00 dm3 at 300 K. Treat methane as a van der Waals gas. The van der Waals gas constants for methane are: a=2.3026 dm6⋅bar⋅mol−2 and b=0.043067 dm..
A fluid undergoes the Carnot cycle in Figure 4-5 with TL = 300 °C, TH = 500 °C. Calculate the amounts of heat and work for each step, as well as the thermodynamic efficiency of the cycle (net amount of work produced over amount of heat absorbe..
at atmospheric pressure ethyl acetate and ethyl alcohol form an azeotropic mixture containing 53.9 mole of ethyl
The mass transfer coefficients are HL=0.436 m and kGa=6.06x10-7kg mol/s m3Pa and are to be assumed constant in thetower for the given concentration range. Use equilibrium data from Appendix A.3. Bynumerical or graphical integration, determine NG. ..
Determine the delta connected load impedances if the system voltage is 440 V. With the information given, is it possible to find whether the load impedance is capacitive or inductive in nature?
Three waveforms seen on an oscilloscope are shown in Figure P1.4.7. If the horizontal scale is set to 50 ms per division (500 ms for the entire screen width), and the vertical scale is set to 5 mV per division (±25 mV for the entire screen height ..
Research the impact mining has had on the early history of Australia. In approximately 1,500 words choose an Australian town or city where mining started in the 18th or 19th or even early 20th Century and describe its early history.
Include in your comparison an analysis of the technical issues (e.g., battery capacity, weight, and charging circuitry), cost issues, and . practicality issues (e.g., user preferences, potential for misplacement or improper usage of charger, and u..
The diameter of the impeller is 3 m and the impeller is installed 1,35 m abobe the bottom of the 2o ft tank. If the temperature is 30 C and the impeller is rotated at 30 r/min, what will be the power consumption ? Find the Reynolds number.
The maximum possible purity of glycol in the finished extract and the maximum purity of water in the raffinate for one equilibriumstage.
Estimate a value for the total project cost that will give 98% confidence that the project can be carried out within the amount estimated.
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