chemical engg material and energy balance ppt

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Project Title::

Project Title: Production of Acrylonitrile by Sohio process )A mmoxidation of Propylene ( 2 Production of Acrylonitrile

Slide 3:

Project Advisor : HASSAN JAVAID NAQVI Co-advisor: SHAFAQ MUZAMMIL Presented b y : MUHAMMAD IRFAN 05 -CHEM- 09 ZUNAIRA MUNIR 05 -CHEM- 25 BASSAM HAMEED 05 -CHEM- 33 NAJAM ZIA BUTT 05 -CHEM- 67 M. SALMAN BARI 05 -CHEM- 105

Contents of Presentation:

Contents of Presentation Introduction & Applications Process Selection Process Description Capacity Selection Material Balance Energy Balance 4 Production of Acrylonitrile

INTRODUCTION & APPLICATIONS:

INTRODUCTION & APPLICATIONS

Physical Appearance :

Physical Appearance Acrylonitrile is a colorless liquid at normal temperature and pressure . CH 2 =CH—CN

Physical Properties:

Physical Properties PROPERTY VALUE Molecular weight 53.06 Boiling point, 0 C (at 103.3 kPa) 77.3 Density, g/L ( at 25 0 C) 800.4 Freezing point, 0 C -83.55 Heat capacity, kJ/(kg-K) 2.094 Viscosity at 25°C , mPa-s (=cP) 0.34 7 Production of Acrylonitrile

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8 Production of Acrylonitrile

Estimated Consumption of Acrylonitrile in 2008 :

Estimated Consumption of Acrylonitrile in 2008 9 Production of Acrylonitrile

PROCESS SELECTION:

PROCESS SELECTION

Previously Adopted Processes:

Previously Adopted Processes 11 Production of Acrylonitrile

Recently Adopted Method:

Recently Adopted Method Ammoxidation of Propylene (Sohio Process) Selection Basis: Single step process Maximum yield Less expensive Useful By products 12 Production of Acrylonitrile

PROCESS DESCRIPTION:

PROCESS DESCRIPTION

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14 BLOCK DIAGRAM Production of Acrylonitrile BLOCK FLOW DIAGRAM

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PROCESS FLOW DIAGRAM 15 Production of Acrylonitrile

Equipment Codes:

Equipment Codes FBR- 01 Fluidized Bed Reactor Q- 01 Quencher D- 01 Decanter C- 01 Compressor A- 01 Absorber M- 01 Mixer DC- 01 , 02 , 03 Distillation columns 16 Production of Acrylonitrile

Chemical Reactions in Fluidized Bed Reactor:

Chemical R eactions in F luidized B ed R eactor 17 Conversion 0.801 0.021 0.027 0.107 0.032 Production of Acrylonitrile

Capacity Selection :

Capacity Selection

Capacity Selection Criteria :

C apacity Selection Criteria S o we selected the capacity as 120000 Tons/year O r 400 Tons/day 19 Production of Acrylonitrile

Uses of Acrylonitrile In Pakistan:

U ses of Acrylonitrile In Pakistan Acrylic Staple Fibre ) DEWAN SALMAN FIBRE LIMITED ( In 1999 the demand of ASF was 40000 tpa and increasing 10 % Annually ABS (Acrylonitrile Butadiene Styrene) Appliance covers Crisper trays Instrument panels 20 Production of Acrylonitrile

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Material Balance

MATERIAL BALANCE:

MATERIAL BALANCE Basis: 400ton /day Acrylonitrile production. Feed Ratio=propene/ammonia/air=1/1.2/9.5

Overall Material Balance :

Overall Material Balance 23 Production of Acrylonitrile

Material Balance FLUIDIZED BED REACTOR :

Material Balance FLUIDIZED BED REACTOR 24 INLET OUTLET Stream # 4 5 6 7 Components kg/hr kg/hr kg/hr kg/hr C 3 H 6 14280 __ __ 243 O 2 __ __ 20672 843 N 2 __ __ 72352 72352 NH 3 __ 6936 __ 1656 CO 2 __ __ __ 4802 HCN __ __ __ 744 AN __ __ __ 14461 ACR __ __ __ 515 ACN __ __ __ 440 H 2 O __ 558 __ 18742 TOTAL 14280 7494 93024 114528 Production of Acrylonitrile

Material Balance QUENCHER:

Material Balance QUENCHER INLET OUTLET Stream # 8 10 11 12 Components kg/hr kg/hr kg/hr kg/hr C 3 H 6 243 __ __ 243 O 2 843 __ __ 843 (NH 4 ) 2 SO 4 __ __ 6440 __ H 2 SO 4 __ 5737 956 __ N 2 72352 __ __ 72352 CO 2 4802 __ __ 4806 HCN 744 __ 7 736 AN 14461 __ 145 14317 ACR 515 __ 5 510 ACN 440 __ 4 436 H 2 O 18742 13387 13387 742 TOTAL 114809 19124 20944 112981 25 Production of Acrylonitrile

Material Balance DECANTER:

Material Balance DECANTER 26 INLET OUTLET Stream # 13 14 16 Components kg/hr kg/hr kg/hr C 3 H 6 243 __ 243 O 2 843 __ 843 N 2 72352 __ 72352 CO 2 4806 __ 4802 HCN 736 74 662 AN 14317 7159 7158 ACR 510 255 255 ACN 436 218 218 H 2 O 18753 11251 7501 TOTAL 112981 18957 94035 Production of Acrylonitrile

Material Balance ABSORBER:

Material Balance ABSORBER INLET OUTLET Stream # 16 17 18 19 Components kg/hr kg/hr kg/hr kg/hr C 3 H 6 243 __ 243 __ O 2 843 __ 843 __ N 2 72352 __ 72352 __ CO 2 4802 __ 4802 __ HCN 662 __ __ 66 2 AN 7158 __ 6 7153 ACR 255 __ 154 101 ACN 218 __ __ 28 H 2 O 7501 90194 1036 96661 TOTAL 94035 90 19 4 79435 104794 27 Production of Acrylonitrile

Material Balance HCN Recovery System:

Material Balance HCN Recovery System INLET OUTLET St ream # 20 23 26 Components kg/hr kg/hr kg/hr HCN 736 736 __ AN 14310 2 14308 ACR 356 2 354 ACN 436 1 435 H 2 O 107911 1 107910 TOTAL 123750 742 123007 28 Production of Acrylonitrile

Material Balance H2O Recovery System:

Material Balance H 2 O Recovery System INLET OUTLET St ream # 26 32 31 Components kg/hr kg/hr kg/hr AN 14308 14302 7 ACR 354 342 12 ACN 435 434 0.5 H 2 O 107910 1 107909 TOTAL 123007 15079 107928 29 Production of Acrylonitrile

Material Balance AN Recovery System:

Material Balance AN Recovery System INLET OUTLET St ream # 32 35 38 Components kg/hr kg/hr kg/hr AN 14302 14295 7 ACR 342 342 __ ACN 434 1 433 H 2 O 1 __ 1 TOTAL 15079 14638 441 30 Production of Acrylonitrile

Energy Balance:

Energy Balance

ENERGY BALANCE:

ENERGY BALANCE BASIS: Reference Temperature: 25 0 C Reference Pressure: 101.325 kPa 1 hr Operation

Energy Balance FLUIDIZED BED REACTOR:

Energy Balance FLUIDIZED BED REACTOR 33 Heat of Reaction = 285108 kJ/mol INLET OUTLET Stream # 4 5 6 7 Temperature (K) 473 473 523 673 Pressure ( kPa ) 223 223 223 203 Enthalpy (KJ/hr) 3.7 ×10 6 3.3 ×10 9 3.5 ×10 6 5.9 ×10 7 R eactor Heat Duty (KJ/hr ) 3.3 ×10 8 Production of Acrylonitrile

Energy Balance QUENCHER:

Energy Balance QUENCHER 34 INLET OUTLET Stream # 8 10 11 12 Temperature(K) 493 278 338 358 Pressure(kPa) 172 173 101 132 Enthalpy (KJ/hr) .2 7 ×10 7 5 ×10 5 1 ×10 6 .8 9 ×10 6 Production of Acrylonitrile Quencher Heat Duty (KJ/hr ) 2.0 ×10 6 H eat of reaction= 8916KJ/Kg

Energy Balance ABSORBER:

Energy Balance ABSORBER 35 INLET OUTLET Stream # 16 17 18 19 Temperature(K) 317 277 283 313 Pressure(kPa) 172 101 101 162 Enthalpy (KJ/hr) 7 . 6×10 5 2.3 ×10 6 1.3 ×10 6 4×10 5 Production of Acrylonitrile

Energy Balance HEAT EXCHANGERS :

Energy Balance HEAT EXCHANGERS 36 Heat Exchahger 1 INLET OUTLET Stream # 7 8 Temperature(K) 693 493 Pressure ) kPa ) 203 172 Heat Duty ) kJ /hr( 3 . 0 ×10 6 Heat Exchanger 2 INLET OUTLET Stream # 12 13 Temperature(K) 358 308 Pressure ) kPa ) 132 122 Heat Duty ) kJ /hr( 4.4 ×10 7 Production of Acrylonitrile

Energy Balance HCN Recovery System:

Energy Balance HCN Recovery System INLET OUTLET Stream # 20 23 21 22 26 Temprature (K) 311 299 306 299 388 Pressure (kPa) 132 101 125 101 152 Enthalpy (KJ/hr) 2.6 ×10 6 1.0 ×10 4 2.6 ×10 3 1.4 ×10 5 2.0 ×10 6 37 R eboiler Heat Duty (KJ/hr) 2.3 ×10 4 C ondenser Heat Duty (KJ/hr) 2.1 ×10 3 Production of Acrylonitrile

Energy Balance H2O Recovery System:

Energy Balance H 2 O Recovery System INLET OUTLET Stream # 26 32 27 28 31 Temprature (K) 388 364 369 364 413 Pressure (kPa) 152 132 148 132 162 Enthalpy (KJ/hr) 2.0 ×10 6 1.2 ×10 6 3.6 ×10 7 1.7 ×10 6 2.6 ×10 7 38 R eboiler Heat Duty (KJ/hr) 5. 3 ×10 6 C ondenser Heat Duty (KJ/hr) 5.4 ×10 5 Production of Acrylonitrile

Energy Balance AN Recovery System:

Energy Balance AN Recovery System INLET OUTLET Stream # 32 35 34 33 38 Temprature (K) 364 350 350 359 370 Pressure (kPa) 132 111 111 131 152 Enthalpy (KJ/hr) 1.2 ×10 6 1.0 ×10 6 1.6 ×10 5 3.1 ×10 5 5 ×10 4 39 R eboiler Heat Duty (KJ/hr) 3.2 ×10 5 C ondenser Heat Duty (KJ/hr ) 4.8 ×10 5 Production of Acrylonitrile

THANKS FOR YOUR ATTENTION... ANY QUESTION??? :

THANKS FOR YOUR ATTENTION... ANY QUESTION???