Neraca Massa Magnesium Oksida [PDF]

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Flowsheet Sand Thickener Filter



Clarifier



Waste



Mixer Flocculator Sea water Waste Bowl classifier



Water Lime



CO2



Natural gas



Milk of lime Wash towers



Screen Boiler Soda ash



Scrubber



Waste



Rejects towaste



Compressor



CO2



Turbo flocculator



Turbo carbonator



Tank



Tank



Purifier



Purifier



Sand



Fresh water



Waste



Slacker



filter freshwater



Mg(OH) 2 slurry storage



Filter Purified carbon



Carbonation tank



Boiling



Mg0



tank



Spray



(Light)



drier



dioxide



Basic carbonates



Calciner



Waste



Purified Mg (OH) 2 Various finishing operations for oxides and hydroxides, such as : (1) Filtering (2) Drying



(3) Calcining (4) Packaging



Mg(OH) 2 paste (1) (4)



Various Mg(OH) 2 powders (1) (2) (4)



Heavy Mg0 (2) (3) (4)



Milk of magnesia (4)



PERHITUNGAN NERACA MASSA PEMBUATAN MAGNESIUM OKSIDA



Ca(OH)2



CO2



Sea Water



Mg(OH)2 THICKENER



STORAGE



Mg(OH)2



MgCO3 CARBONATION TANK



H2O



100.000 L MgCl2 4,176 g/L MgSO4 1,668 g/L



Mg(OH)2 CaCl2



MgCO3



CaSO4.2H2O



CO2



Ca(OH)2



PASTE POWDER HEAVY Milk of Magnesia



H2O



MgO



MgO, CO2



H2O



MgCO3 CALCINER



BASIC CARBONATES



1. NERACA MASSA PADA THICKENER



Ca(OH)2 Sea water



Mg(OH)2



100.000 L MgCl2 4,176 gr/L MgSO4 1,668 gr/L H2O



CaCl2 CaSO4.2H2O



DRYER



Ca(OH)2 H2O Basis 100.000 L air laut MgCl2 dalam 100.000 L = 4,176 gr/L x 100000 L = 417600 gr : 1000 kg/gr = 417,6 kg Mol MgCl2 = 417,6 kg : 95 kg/kmol = 4,396 kmol MgSO4 dalam 100.000 L =1,668 gr/L x 100000 L = 166800 gr : 1000 kg/gr = 166,8 kg Mol MgSO4 = 166,8 kg : 120 kg/kmol = 1,39 kmol Air laut = 100000 L x 1 kg/100 L = 1000 kg H2O dalam air laut = 1000 kg – (417,6 + 166,8) kg = 415,6 kg Mol H2O = 415,6 kg : 18 kg/kmol =23,08 kmol Reaksi 1 MgCl2 + Ca(OH)2 m



4,396



b



4,396



Mg(OH)2 + CaCl2



-



-



-



4,396



4,396



4,396 4,396 kmol



s



-



4,396



4,396



BM



-



74



58



kg



-



325,304



254,968



Komponen



Input (kg)



MgCl2 Ca(OH)2 Mg(OH)2 CaCl2 total



417,6 325,304



742,9



111 kg/kmol 487,956 kg Output (kg)



254,968 487,956 742,9



Reaksi 2 MgSO4 + Ca(OH)2 + 2H2O m



1,39



-



23,08



b



1,39



1,39



s



-



1,39



bm



-



74



kg



-



Mg(OH)2 + CaSO4.2H2O -



-



1,39



1,39



20,3



1,39



1,39



18



58



172



2,78



102,86 365,4



komponen



Input (kg)



MgSO4 Ca(OH)2 H2O Mg(OH)2 CaSO4.2H2O total



166,8 102,8 415,5



685,2



80,62



kmol kg/kmol



239,08 kg



Output (kg)



365,4 80,62 239,08 685,1



2. NERACA MASSA PADA STORAGE



Mg(OH)2



Mg(OH) 2



Mg(OH)2



Paste



Powder Heavy MgO Milk of Magnesia



Mg(OH)2 yang masuk kedalam storage = (254,968 + 80,62) kg = 335,588 kg Mg(OH)2 yang akan diubah menjadi 4 produk = 200 kg



Mg(OH)2 yang akan diolah pada carbonation tank = 335,588 kg – 200kg = 135,588 kg Mol Mg(OH)2 = 135,588 kg : 58 kg/kmol = 2,337 kmol



3. NERACA MASSA PADA CARBONATION TANK



CO2 Mg(OH)2



MgCO3, H2O



135,588 kg



MgCO3, CO2



Mg(OH)2 + CO2 m



2,337



b



2,337



MgCO3 + H2O



-



-



-



2,337



2,337



2,337 2,337 kmol



s



-



2,337



2,337



BM



-



44



84



Kg



-



102,828



18



kg/kmol



196,308 42,066 kg



komponen



Input (kg)



Mg(OH)2 CO2 MgCO3 H2O total



135,5 102,8



238,4



Output (kg)



196,3 42,06 238,37



4. NERACA MASSA PADA DRYER



H2O



MgCO3 196,308 kg, H2O 42,066 kg



MgCO3 196,308 kg (95%) H2O 10,332 kg (5%) Kemurnian MgCO3 95% H2O pada MgCO3 : 5/95 x 196,308 kg = 10,332 kg H2O yang menguap pada dryer = 42,066 kg – 10,332 kg = 31,733 kg



5. Neraca massa pada Calciner



MgO + CO1



MgCo3 m:



2,337



b:



2,337



MgCO3 196,308 kg



MgO + CO2 -



-



2,337 2,337



s:



-



2,337



BM:



-



40



Kg:



-



93,48



2,337 kg 44



kg/kmol



102,828 kg



Tabel Neraca Massa



Komponen



Input (kg)



MgCO3 MgO Co2 TOTAL



196,308



196,308



Output (kg) 93,48 102,828 196,308