Question

2)Ethene, C2H4, burns with (125+2*A) % theoretical air in a steady flow constant-pressure process with reactants entering at Po, T. Find air/fuel ratio, and volume of the air to burn 1 lb ethane. Stoichiometric C2H4+3(02 +3.76N2) ► 2002 + 2H20 + 11.28N2 A = LAST DIGIT OF YOUR CLASS ID (20 POINTS)

A=1

Answer 1

solution & Data given Po = lookPa, To =book Stoichiometric CyHF+3[©2+3.76N2] —> 202 + 2H2O +11.28 Nz (Bumg with (125+2x 4) = (125+ 2x1) %. = 1274. Exceu tir C₂Hq + 3.81 [ 0₂ +3.76N2] = 200 + 2 H₂O + 6.8102 +14:35 N₂ Now calculate Alf Ratio A 3.81[2X16 +3.76X2X143 [2x12.+ 4813 A = 18.679 - Aneas {air-fuel Reho}

For calculating the volume of air stogo no = 3.81, Ne = 14:33 pv=nRT 3.8 1 X 8-314x 300 - Too x103 Vo = 0.055m3 similarly VN = 3.76X Voz = 0.357 m3 volume of Air required to burn leg of CH4 1. Vair = Vogt VN₂ = 0.095+ 0.357 m3 Vair = 0.453 m3 for Ikg. • Qata in 1 kg = 0.453 m3 Ikg = 0.483 lb in 1 lb of C2H4 0.45 m3 0.453 Volume of air required - lm3 Am.