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reactor design my reactor design1 - REACTOR DESIGN Volume...

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" REACT Volume Calculations REACTIONS OCCURING 1 (G) (L) ( L ) 2 CH3OH + CH3COOH C (L) (L) 3 CO + H20 CO2 + (G) (L) ( G ) CO + CH3OH CH3COOH
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4 4CO + 3H2O (G) (L) STEP 1: According to Hassan and Robinson ( As Gas mass flowrate ( MG ) = ρG QVG It is given that NR σ Putting the values in equation A we g ЄG = STEP 2 Assume a supeficial gas velocity ( First of all we will calculate gas hold u Є G = 0.25(Q VG *N R 2 /σ) 0.45
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Vsg STEP 3 Calculate area A = QVG/Vsg A STEP 4 Calculate diameter As So D STEP 5 Volume determination As ЄG + ЄL ЄL where ЄL Also ЄL = VL/VT Also we have residence time A =( π / 4 )^ D 2 D 2
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TR Now VL = TR * Vo Where Vo = Mass flowrate of methanol ( ML) = = Density ( ρ ) = Vo = putting in equation B we get VL = Now from equation B VT ACCORDING TO BOOK " Chemical WE HAVE TO GIVE HEADSPACE IN If V < 1.9 m^3 than 15 % allowance is If V > 1.9 m^3 than 10 % allowance is As our reactor volume is greater than Therefore finally VR =
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Step 6: Verification of superficial velocity by o HR = VR/A HR = HR/DR = RESULTS VR HR DR VSG Internal Dimension Calculations Diameter of the impeller blade = d2 = Distance from the bottom of the reactor bottom of i Height of the impeller blade = h3 =
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Width of the impeller blade = L3 = Width of the baffles = J = Power absorbed by the impeller where COMPONENTS CH3COOH CH3COOCH3 H2O CH3I TOTAL Similarly COMPONENTS CH3COOH CH3COOCH3 H2O First we will calculate the power absorbed when on Reynolds # is given as = Re = (ρ L *N R *(d2^2))/µ L ) ρ L = ρ L = µ L =
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CH3I TOTAL density of liquid rotational speed of impeller viscosity of liquid phase σ surface tension of liquid phase g acceleration due to gravity thermal conductivity Re = 1882355.6 Against this reynold # the power # Np is given in fi Np( against Re from Fig is) = so this implies 14723.52 = 14.72 2.8 3.8 µ L = ρ L N R µ L K L As Np is P L /(ρ L *N R ^3*d2^5) P L /(ρ L *N R ^3*d2^5) = P L = Aeration Number= NQG=QVG/(N R *d2^3)
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Fot this we need QVG which is mass flowrate d QVG = 0.03 NQG = 0.042 Now from fig 4.21 page # 276 book "chemical r 0.58 8.466 11.4 2 Liquid Holdup: Denoted by Є11 or ЄL is given as = Gas Holdup: Denoted by Є1 or ЄG is given as = P LG /P L = P LG =
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Sparger Calculations: First we will have to calculate bubb According to Jiang et al (1995) it is giv dB^2 = ((VSG*UL/σ)^-0.04) ((ρL*σ^3)/g*UL^4)^-0.12) ((ρL/ρg)^0.22) σ/g*ρL dB^2 = dB = therefore no need to determine the Reactor Jacket Calculations According to Trembuze et al when
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Jacket Specifications: Jacket height Spacing between jacket and reactor Pitch
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