Nama : Achmad Faisal Rozi ZuniparNIM : 12614029

Investor dari Jepang ingin mendirikan pabrik formaldehida (CH2O) dari Methanol (CH3OH) dengan harga Rp. 7.000/liter komposisi 90% dan Oksigen (O2) dari udara atmosfir dengan katalis Ag, konversi 50% Rx 1 dan 60% Rx 2 formaldehida.T = 620C P=45 atm kapasitas 20 ton/thn. Harga formaldehyde 0,9 $/kg 37%. Pabrik beroperasi Januari 2001, Pembelian alat 1998. Prediksikan harga pembelian peralatan/Purchase Equipment Cost (PEC). Reaksi :CH3OH + 1/2O2CH2O + H2O H=-156 kj .. (1)CH3OHCH2O + H2 H= +85 kj .(2)BM : C =12, H=1, O=16 Kg/KmolDiagram Proses :

Asumsi Perhitungan : Waktu tinggal 3 jam methanol = 0,791 gr/ml=0,791 kg/liter formaldehyde = 0,815 gr/ml=815 kg/liter Indeks 1998 = 390,6 dan 2001 = 395,4 Operator $21/jam Supervisor $28/jam

Kondisi Operasi : P : 45 atm T : 620 C BM C : 12 Kg/Kmol O : 12 Kg/Kmol H : 1 Kg/Kmol Umur Pabrik : 10 Tahun

Penyelesaian :

Kapasitas Produksi 20 ton/thn CH2O

=

CH3OH + 1/2O2CH2O + H2O H=-156 kj .. (1)CH3OHCH2O + H2 H= +85 kj .(2)

1 mol CH3OH ~ mol O2~ 1 mol CH2O ~ 1mol H2O RX (1)1 mol CH3OH ~ 1 mol CH2O ~ 1mol H2 RX (2)

Dari grafik 1, didapat harga tangki pada kapasitas 100.000 galons = $80000Pembelian Tangki Metanol berdasarkan SIX TENTHS FACTOR :

Jadi harga tangki tahun 2001 adalah :

Grafik. 1. Data Harga Tangki 1998Catatan :

Sumber Process Equipment Cost Estimation

Tabel 1. Data Harga Peralatan

FIXED CAPITAL

a. Total Direct Plant Cost

b. Total Indirect Plant Cost

c. Tambahan

Total Fixed Capital= a + b + c= 37,466.31 + 8,215.20 + 27,408.91= $ 73,090.42

MANUFACTURING COST

a. Direct Manufacturing Cost

b. Indirect Manufacturing Cost

c. Fixed Manufacturing Cost

Total Manufacturing Cost= a + b + c= 51,029.41 + 8,748.00 + 3,654.52= $ 63,431.93

GENERAL EXPENSE

Sheet10.0014029181Kmol/Mnt

Sheet1Basis perhitungan Kapasitas :20Ton/thn =0.04Kg/mnt=0.0014Kmol/mntJumlah produk R1 =60%Konversi R1 =50%Jumlah produk R2 =40%Konversi R2 =60%metanol =0.791kg/lit2.99kg/galFormaldehide =0.815kg/lit3.09kg/galWaktu tinggal =3Jam.O2 =0.0892lb/ft^30.0054kg/galP=1 atm.H2 =0.0056lb/ft^33.40E-04kg/galP=1 atm

Komp.BMInputReaksi (FA)Output(Kg/Kmol)FAo (Kmol/Mnt)FVo (gal/mnt)Kmol/MntKmol/Mntgal/mntCH3OH320.001680.017990.000840.000840.009000.000940.010000.000560.000370.00400O2320.000844.980010.000420.000422.49001CH2O300.000.000.000840.000840.008190.000.000.000560.000560.00546H2O180.000.000.000840.000840.00400H220.000.000.000560.000563.305195.008005.82583

Sheet1=5.04Galon

Sheet1=$234.41Harga ditahun 1998

Sheet1=$237.29

Sheet1T =620CP =45atmIndeks 1998390.6indeks 2002395.4Simbol AlatNama AlatCapacityHarga 1998Harga 2002KeteranganGal/mntGal($)($)E-01Tangki Bahan Baku0.027995.04234.41237.29E-02Poma0.027995.0425.1025.41E-03Poporizer0.027995.04214.16216.79E-04Heater0.027995.041,487.741,506.02E-05Scrubber4.98001896.402,543.262,574.52E-06Kompresor4.98001896.40572.54579.58pada 1 atmE-07Heater4.98001896.4088.1889.26pada 1 atmE-08Filter5.008901.444.824.88E-09Reaktor5.008901.445.505.57E-10Absorber-15.825831,048.6559.2760.00E-11Absorber-25.825831,048.6559.1659.89E-12Pompa0.030635.5159.7660.50E-13Heater0.030635.511,611.711,631.52PendinginE-14Make tank0.030635.51745.28754.44E-15Pompa0.030635.5159.7660.50E-16Menara Destilasi0.030635.511,446.621,464.39E-17Tangki Produk0.013652.46619.66627.279,957.82Pembelian dilakukan FOB maka :* Asuransi 20%=$1,991.56- Transfortasi 5 %=$497.89Jadi :Purchased Equipment Cost (PEC) =$12,447.28

Sheet1No.Komponen%Faktor PengaliCost ($)1PEC12447.282Instalasi Peralatan39%PEC4,854.443Instalasi Instrumentasi28%PEC3,485.244Instalasi Pemipaan31%PEC3,858.665Instalasi Listrik10%PEC1,244.736Bangunan dan Servis22%PEC2,738.407Yard Improment10%PEC1,244.738Fasilitas Servis55%PEC6,846.009Tanah6%PEC746.8437,466.31

Sheet1No.Komponen%Faktor PengaliCost ($)1Engineer & Supervisor32%PEC3,983.132Construction Expense34%PEC4,232.088,215.20

Sheet1No.Komponen%Faktor PengaliCost ($)1Gaji Kontraktor50%a+b22,840.762Kontingen10%a+b4,568.1527,408.91

Sheet1No.Komponen%Faktor PengaliCost ($)1Bahan Baku30,034.882Pekerja20%Penjualan9,720.003Supervisor25%Pekerja2,430.004Utilitas10%Penjualan4,860.005Maintenance4%FC2,923.626Plant Supplies15%Maintenance438.547Royalti & Paten5%PEC622.3651,029.41

Sheet1No.Komponen%Faktor PengaliCost ($)1Payroll Overhead15%Pekerja1,458.002Laboratorium15%Pekerja1,458.003Plant Overhead50%Pekerja4,860.004Packing10%Penjualan972.008,748.00

Sheet1No.Komponen%Faktor PengaliCost ($)1Depresiasi2Pajak PBB4%FC2,923.623Asuransi1%FC730.903,654.52

Sheet1No.Komponen%Faktor PengaliCost ($)1Administrasi3%MC1,902.962Sales5%MC3,171.603Research3.5%MC2,220.127,294.67