Saturated Steam ait an abseluben of 5 bar is Used 0 heat a Stream of Nitroyen- Nibroyen enters a heas exchanger 9t 0°c° und an absolute pressure of l01 bar at q rabe of loom/min: 18'is then heated 45 Constant Pressure to loa°ć- The steam Conden ses and leaves the exchanger 54°c.The specif.c enthalpy of nibrogen at the given pressure is -0:73h/mut at°ouc and e as q Saturate liquid 9o 2.19K/ol 9b lo0°C.

6.4% CO2, 0.2% 02, 0, 40% CO at 500 C. 50.8% H2. and 200 gmol of synthesis gas, the remainder being Na, is burned with 40% excess dry air at 25 C. It is known that combustion gases exit the chimney at a temperature of 720 C. Determine the mole amounts of the exiting flue gases and the heat transfer from or to the combustion process.

1:02 AM ll Verizon 99%- Done 4. The enthalpy of vaporization of water at 100 °C is 2256.9 kJ/Kg. Assuming an average heat capacity for liquid water and heat capacity of vapor calculate the heat of vaporization at 25 °C. At 25 °C the vapor pressure of water is 23.756 mm Hg.

The purge gases from a synthetic ammonia plant contain 4% ammonia by volume and 96% hydrogen, nitrogen, argon and other inerts. This gas is to be scrubbed at 5 atmosphere pressure with water in a bubble plate tower maintained at 68°F by cooling coils. With water and inert gas rates of 0.88 and 4 lb/min ft2 of tower cross section respectively, how many theoretical plates will be required to produce a solution containing 13% ammonia by weight? The average molecular weight of the inert gas is 21. Data: the following gives the equilibrium partial pressure of ammonia solutions at 68°F 69.6 166 5 10 Partial pressure, torr 12 Pound NH3/100 gram H2O 1 19.2 31.7 1.5 5 50 3.75

A sulfur bumer, burning sulfur of 98% purity with dry air, discharged gas at 1300°F containing 16% SO2, 5% O2, and 79% Na. Both the sulfur and the air supplied are at 80°F. The heat of combustion of sulfur to SO, is 127690 BTU/Ibmole at 25°C. The burner gas is mixed with more dry air (secondary air) and passed through a converter. Analysis of the converter gas shows 4.2% SO2, 7.5% Oz and 88.3% Na. An absorber subsequently removes 95% of the SOs in the converter gas by absorbing it in 97% H,SO, to produce 100% H,SO. solution. No SOs is formed in the absorber. a. Calculate the volume of secondary air supplied at 80°F and 735 mmHg per 100 lbs impure sulfur entering. b. How many pounds of 97% HaSO. solution must be supplied per mole of SO3-free converter gas?

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2 A triple-acting evaporator with direct current power must concentrate 15000 kg/h of an aqueous solution entering 25 C from 10% to 40% by weight. For the heating is available live steam at 2.2 at, and on the third effect a vacuum is maintained that allows the solution to boil at 30ºC. The dissolution does not present an appreciable increase in the point of boiling and its specific heat is equal to the unit for all concentrations. The integral heat transmission coefficients for effects I, II, III, in Kcal/m2*h*ºC, they are worth 2800, 2500 and 1600. Apply to each effect: a) Hourly consumption of heating steam b) Boiling temperature c) The heating surface.

A fruit juice at 20°C with 5% total solids is being concentratedin a single-effect evaporator. The evaporator is being operatedat a suffi cient vacuum to allow the product moisture to evaporate at 80°C, and steam with 85% quality is being supplied at 169.06 kPa. The desired concentration of thefi nal product is 40% total solids. The concentrated productexits the evaporator at a rate of 3000kg/h. Calculate the(a) steam requirements and (b) steam economy for theprocess, when condensate is released at 90°C. The specifi cheat of liquid feed is 4.05kJ/(kg°C), and of concentratedproduct is 3.175kJ/(kg°C).   A single-effect evaporator is being used to concentrate10,000 kg/h of tomato juice from 5% total solids to 30% totalsolids. The juice enters the evaporator at 15°C. The evaporatoris operated with steam (80% quality) at 143.27 kPa. Thevacuum inside the evaporator allows the juice to boil at 75°C.Calculate (a) the steam requirements and (b) steam economyfor the process. Assume the…

The result of air temperature measurement obtained dry ball temperature 37°C and wet ball temperature 27.5 °C. Using a graph of psychotry, determine the properties of the air as follows:a. RH : %B. Moisture content : kg of water / kg of airc. Specific volume : m3/kgd. Enthalpi : kJ/kgE. Condensation temperature : °CIf the air is within 162 m3 of space, specify theF. Weight of air (dry air and moisture) : Kgg. amount of water content in the room: kg

2. It is desired to produce 10 kg.mol lime from calcinations of CaCO, (pure) in a rotary kiln. Producer gas of composition 7.2% CO,, 1.6% O, 16.6% CO and 74.6% N, is combusted with 20% excess air to obtain the desired temperature in the kiln. The limestone and air are supplied at 298K, whereas producer gas is heated to 900K. Lime is discharged at 1200K and at 500K. Calculate the amount of the producer gas (latm and 273K).