Process Calculations GATE-1996
Common data for Q 1 & 2:
The reaction A + B → C has been conducted in a reactor as shown
Q 1: The number of boundaries around which material balances can be written is
Q 2: The number of independent balances (material) that can be made around the reactor are
Q 3: In a mixture of benzene vapor and nitrogen gas at a total pressure, of 900 mm Hg. if the absolute humidity of benzene is 0.2 Kg benzene / Kg nitrogen, the partial pressure of benzene in mm Hg is
Q 4: A hydrocarbon is burnt with excess air. The Orsat analysis of the flue gas shows 10.81% CO2, 3.78% O2, and 85.40% N2. Calculate the atomic ratio of C : H in the hydrocarbon and the % excess air.
Q 5: Methanol vapor can be converted into formaldehyde by the following reaction scheme:
CH_3OH+1/2O_2\rightarrow HCHO+H_2O CH_3OH\rightarrow HCHO+H_2The fresh feed to the process was 0.5 Kg mol /h of O2 and an excess methanol. All of the O2 reacts in the reactor. Formaldehyde and water are removed from the product stream first, after which H2 is removed from the recycled methanol. The recycle flow rate of methanol was 1 Kg mol/h. The ratio of methanol reacting by decomposition to that by oxidation was 3. Draw the flow diagram and then calculate the per-pass conversion of methanol in the reactor and the fresh feed rate of methanol.