Question

Question 3 [25 marks) The combustion of ńch,(9),in = 200 kmolh-of methane takes place at atmospheric-isobaric conditions (P = 1 atm) in a continuous reactor, with air, using a 200% fractional excess of oxygen, according to: CH_(9) +202(g) → C02(g) + 2 H20(g) R1 The inlet gases are supplied at T=50°C, and leave the reactor at T=400°C, according to the following values: kmolhº / OUTLET 50 ÑO2(g)out Compound CH49) 0269) CO2(g) H20(9) N2(9) 150 300 balance (i) Calculate the oxygen and nitrogen molar flows at the inlet and outlet streams. [6 marks) (ii) Calculate the heat exchanged in the process. [14 marks] (iii) Provide the minimum fractional conversion of methane needed for the process to be exothermic and explain the result. [5 marks]

Answer 1

Solution! 6) - 200 kmollha. regia C H, 3) + 30,191 ACO, (g) + 34,068). CH₂= 200knallhy CH4 = 50 knallhs. Combustion Chamber ajr 02:2 N₂ = ? Ho - 300 kmollis CO2: 150 kmollhr. Basis: 200 kmol Ihr of Chu . % Exces 02 - 2004 Theoroti cal O₂ 2x 200- 400 kmollhe Excess O₂ = O, fed - Os theorotical theoretical Offed - 400 Hoo 0 fed = 1200 kmollha Na fed= 79 x Oz fed 79 x 1700 Na feda 4514.28 kmalm.

Since Ne is an inert no gas. Na fed Ne product 'z practuut 4514.78 kmollhs 6 O₂ prodent Os fed 02 reated from stoichiometry Os reached = 400 kmollhr. O, fed 1200 kmollha 10 product 1200- 400 Os prodent 800 kmolly
i am able to solve only first part because to solve other parts the specific heat data is not given....if you provide that then i can also solve remaining parts.

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