Chemical Engineering

A spent sulfuric acid solution is brought up to strength for a pickling process in a mixer. Spent solution at 3% sulfuric acid (by weight) is mixed with a 50% solution (by weight) to obtain the desired product concentration of 40% acid by weight. All are aqueous solutions. Determine all flowrates on the basis of 100 lbm/h of product. If the actual flow of the spent stream is 300 lbm/h, what must the flowrates of the streams be?

A spent sulfuric acid solution is brought up to strength for a pickling process in a mixer. Spent solution at 3% sulfuric acid (by weight) is mixed with a 50% solution (by weight) to obtain the desired product concentration of 40% acid by weight. All are aqueous solutions. Determine all flowrates on the basis of …

A spent sulfuric acid solution is brought up to strength for a pickling process in a mixer. Spent solution at 3% sulfuric acid (by weight) is mixed with a 50% solution (by weight) to obtain the desired product concentration of 40% acid by weight. All are aqueous solutions. Determine all flowrates on the basis of 100 lbm/h of product. If the actual flow of the spent stream is 300 lbm/h, what must the flowrates of the streams be? Read More »

E4.6-3 Yield and Selectivity in a Dehydrogenation The reactions take place in a continuous reactor at steady state. The feed contains 85.0 mole% ethane and the balance inerts (1). The fractional conversion of ethane is 0.501, and the fractional vi) ethylene is 0.471. the to methane production. ethylene e producifnlate the molar composition of the product gas and the selctivity of etnld e Basis: 100 mol Feed 100 mol 0.850 mol C2He/mol 0.150 mol Umo! し ,ri (mol C2H6) ,12 (mol C2H4) n3 (mol H2) n4 (mol CH4) ns (mol )

EXPERT ANSWER given data feed F=100 mol mole fraction of ethane in feed xethane = 0.85                 moles of ethane in feed = xethane F =85 mol moles fraction of inert xi =0.15                               moles of inert in feed=xiF=15mol fractional convertion of ethane Xe = 0.501   =reacted ethane/total ethane in feed therefore reacted ethane=0.501*85=42.585mol unreacted ethane=85-42.585=42.415 fractional Yield of ethylene Yethylene=0.471=ethane reacted …

E4.6-3 Yield and Selectivity in a Dehydrogenation The reactions take place in a continuous reactor at steady state. The feed contains 85.0 mole% ethane and the balance inerts (1). The fractional conversion of ethane is 0.501, and the fractional vi) ethylene is 0.471. the to methane production. ethylene e producifnlate the molar composition of the product gas and the selctivity of etnld e Basis: 100 mol Feed 100 mol 0.850 mol C2He/mol 0.150 mol Umo! し ,ri (mol C2H6) ,12 (mol C2H4) n3 (mol H2) n4 (mol CH4) ns (mol ) Read More »

Figure 1) explains four Argand diagrams. In each diagram, there are two roots belonging to 2nd order process. Figure (II) includes four unit step responses. Mach diagrams in Figure () with the corresponding in Figure (II) and give the reason. 2 X Imaginary Axis seconds) Imaginary Axis (seconds) -1 Real Aals seconds) 3 Real Axls (seconds 2 X Imaginary Als seconds) Imaginary Axis seconds) 0 아 0 X 2 0 RealAxis seconds) Real Axis (seconds Figure (1) Roots Step response А Step response 1.5 Amplitude Amplitude 05 0.5 10 10 Time (seconds) Stop response C Time seconds Step response praphus Amplitude 05 10 10 Time (seconds) Time seconds) Figure (II) unit step response

EXPERT ANSWER

a vessel which contains gases a and b at 1 atm and 4.5 c is connected to another vessel with different concentration of gases at the same temperature and pressure. the vessels are connected by a 23 cm long tube with inside diameter of 3.8 cm at the tube with inside diameter of 3.8 cm at the tube inlet and of 2.5 cm at the tube outlet. determine steady state rate of transport of gas a between the vessels if concentration of a in one tank is 85% mole and that in the other thank is 7% mole. transfer occurs by molecular diffusion and the diffusity is dab = 4.5 x 10^-5 m/sec.

a vessel which contains gases a and b at 1 atm and 4.5 c is connected to another vessel with different concentration of gases at the same temperature and pressure. the vessels are connected by a 23 cm long tube with inside diameter of 3.8 cm at the tube with inside diameter of 3.8 cm …

a vessel which contains gases a and b at 1 atm and 4.5 c is connected to another vessel with different concentration of gases at the same temperature and pressure. the vessels are connected by a 23 cm long tube with inside diameter of 3.8 cm at the tube with inside diameter of 3.8 cm at the tube inlet and of 2.5 cm at the tube outlet. determine steady state rate of transport of gas a between the vessels if concentration of a in one tank is 85% mole and that in the other thank is 7% mole. transfer occurs by molecular diffusion and the diffusity is dab = 4.5 x 10^-5 m/sec. Read More »

A catalytic converter with a large and thin ceramic slab and heat source of g ̇ w/m^3 . The outside surface temperature Tw of the slab is equal to T1 and the slab thickness is equal to L. Drive an expression to represent the maximuminternal temperature and the heat flux at the wall.

A catalytic converter with a large and thin ceramic slab and heat source of g ̇ w/m^3 . The outside surface temperature Tw of the slab is equal to T1 and the slab thickness is equal to L. Drive an expression to represent the maximum internal temperature and the heat flux at the wall. EXPERT …

A catalytic converter with a large and thin ceramic slab and heat source of g ̇ w/m^3 . The outside surface temperature Tw of the slab is equal to T1 and the slab thickness is equal to L. Drive an expression to represent the maximuminternal temperature and the heat flux at the wall. Read More »

500 kg/h of steam drives a turbine. The steam enters the turbine at 44 atm and 450 OC at a linear velocity of 60 m/s and leaves at a point 5 m below the turbine inlet at atmospheric pressure and a velocity of 360 m/s. The turbine delivers shaft work at a rate of 70 kW, and the heat loss from the turbine is estimated to be 104 kcal/h. Calculate the specific enthalpy change associated with process. 500 kgh 44 atm, 450C 60 m/s m 500 kgh 1 atm 360 m/s Q–10 kcalh W,-70 kW

EXPERT ANSWER

Using the correlation for the second virial coefficient (Pitzer correlation), find the molar volume of 1-butanol vapour at 511.5 K and 12.2 bar, giving your answer to the nearest cm3/mol. The critical temperature is 563.1 K and the critical pressure of 1-butanol is 44.23 bar. Take R = 8.314 J/mol-K and the acentric factor for 1-butanol as 0.594.

Using the correlation for the second virial coefficient (Pitzer correlation), find the molar volume of 1-butanol vapour at 511.5 K and 12.2 bar, giving your answer to the nearest cm3/mol. The critical temperature is 563.1 K and the critical pressure of 1-butanol is 44.23 bar. Take R = 8.314 J/mol-K and the acentric factor for 1-butanol …

Using the correlation for the second virial coefficient (Pitzer correlation), find the molar volume of 1-butanol vapour at 511.5 K and 12.2 bar, giving your answer to the nearest cm3/mol. The critical temperature is 563.1 K and the critical pressure of 1-butanol is 44.23 bar. Take R = 8.314 J/mol-K and the acentric factor for 1-butanol as 0.594. Read More »

What is the entropy change of the gas, heated in a steady-flow process at approximately atmospheric pressure when 2,500 kJ is added to 15 mol of 1- butene initially at 260ºC?

What is the entropy change of the gas, heated in a steady-flow process at approximately atmospheric pressure when 2,500 kJ is added to 15 mol of 1- butene initially at 260ºC? EXPERT ANSWER The entropy change of the gas can be found using the entropy equation with the help of final temperature, which can be …

What is the entropy change of the gas, heated in a steady-flow process at approximately atmospheric pressure when 2,500 kJ is added to 15 mol of 1- butene initially at 260ºC? Read More »