Acetaldehyde is synthesized by the catalytic dehydrogenation of ethanol: Fresh feed (pure ethanol) is blended with a recycle stream (95 mole% ethanol and 5% acetaldehyde), and the combined stream is heated and vaporized, entering the reactor at 280°C. Gases leaving the reactor are cooled to condense the acetaldehyde and unreacted ethanol. Off-gas from the condenser is sent to a scrubber, where the uncondensed organic compounds are removed and hydrogen is recovered as a by-product. The condensate from the condenser, which is 45 mole% ethanol, is sent to a distillation column that produces a distillate containing 99 mole% acetaldehyde and a bottoms product that constitutes the recy

Acetaldehyde is synthesized by the catalytic dehydrogenation of ethanol: Fresh feed (pure ethanol) is blended with a recycle stream (95 mole% ethanol and 5% acetaldehyde), and the combined stream is heated and vaporized, entering the reactor at 280°C. Gases leaving the reactor are cooled to condense the acetaldehyde and unreacted ethanol. Off-gas from the condenser is sent to a scrubber, where the uncondensed organic compounds are removed and hydrogen is recovered as a by-product. The condensate from the condenser, which is 45 mole% ethanol, is sent to a distillation column that produces a distillate containing 99 mole% acetaldehyde and a bottoms product that constitutes the recycle blended with fresh feed to the process. The production rate of the distillate is 1000 kg/h. The pressure throughout the process may be taken as 1 atm absolute. Assume that the vapor leaving the top tray of the distillation column is at 475 K and 1 atm, contains the same molar composition as the distillate,…

The fraction recrystallized-time data for the recrystallization at 350°C of a previously deformed aluminum are tabulated here. Assuming that the kinetics of this process obey the Avrami relationship, determine the fraction recrystallized after a total time of 116.8 min. Assume y1 = 0.38 and y, = 0.73. Fraction Recrystallized Time (min) 95.2 126.6 i

Ammonia is oxidized in a continuous reactor 4NH3 g + 5O2 g --> 4NO g + 6H2O g delta AHr= -904.7KJ mol The feed stream (40 mole% NH3 and 60 mole% O2 )enters the reactor at 200 degrees celsius with 80% conversion of ammonia and the products leave at 300 degrees celsius. Determine the quantity of heat required to be added or removed from the reactor.  The basis of calculation: 10mol/s of feed stream. given: the constant heat capacity, Cp, of NH3(g), O2(g), NO(g), and H2O(v) are 0.035, 0.029, 0.029 and 0.033KJ/ mol. degrees celsius respectively.) Cp O2 or table 8 for the calculation.  can you please explaing each step

Paper is being dried with recirculating air in a two-stage drying system at 1 atm. Air (State 1) enters the first dryer at 180°F, where it is adiabatically saturated to 100% relative humidity (State 2). The saturated air is then reheated to 174°F (State 3) before entering the second dryer, where it is adiabatically humidified to 80% relative humidity (State 4). This air stream is then cooled to 60°F, causing some moisture to be condensed (State 5). This is followed by a third heater to heat the air to 180°F (State 1) before it returns to the first dryer, completing the entire cycle. 1. Draw the process on the humidity chart. Label all relevant points consistent with the diagram of the process provided. 2. For each stream, determine the moisture content in air (Ib H20/lb dry air). 3. Determine the lb H20 evaporated (moisture leaving the paper and entering the air) in each dryer per lb of dry air being 100% RH TDB = 174F HEATER 1 DRYER 2 DRYER 1 80% RH 5 HEATER 2 CHILLER TDB = 180F TDB =…

A single effect evaporatoris being used to concentrate 8000 kg/h of tomato juice from 5% total solids to 30% total solids. The juice enters the evaporator at 25°C. The evaporator is operated with steam (80% quality) at 143.27 kPa. The vacuum inside the evaporator allows the juice to boil at 80 ° C. The specific heat of the liquid feed is 4.1 kJ/(kg°C) and the concentrated product is 3.1 kJ/(kg°C). Calculate(a) the steam requirements = Answer kg / hour.(b) steam economy for the process. Assume the condensate is discharged at 75°C. = Answer (kg of water evaporates / kg of steam)