VINYL CHLORIDE PRODUCTION-POWERPOINT

VINYL CHLORIDE PRODUCTION-POWERPOINT - Vinyl Chloride...

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Vinyl Chloride Production Senior Design Presentation Group 10 Jeremy Dry Israel Osisanya Bryce Lawson Deepa Patel Phuong Le Anecia Shelton
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Project Purpose To design an environmentally safe vinyl chloride production plant. Questions: What is Vinyl Chloride? How its being produced? How much does it cost to be environmentally friendly?
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Vinyl Chloride 99% of VCM is used to manufacture polyvinyl chloride (PVC). PVC consumption is second to low density polyethylene. VCM production results in a number of unwanted by-products.
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Dow-TX 9 Formosa-TX 6 Oxyvinyls-L-TX 3 Dow-LA 8 Westlake Monomers-KY 5 Oxyvinyls-D-TX 2 Borden-LA 7 Georgia Gulf-LA 4 Formosa-LA 1 VCM Plant Emissions in the United States 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 123456789 lb/lb VCM product
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Manufacturing Methods Vinyl Chloride from Acetylene Vinyl Chloride from Ethane Vinyl Chloride from Ethylene (Direct Route) Vinyl Chloride from Ethylene (EDC)
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Direct chlorination CH 2 CH 2 + Cl 2 ClCH 2 CH 2 Cl (EDC) Oxychlorination CH 2 CH 2 + 2 HCl + ½ O 2 EDC+ H 2 O EDC pyrolysis 2 EDC 2 CH 2 CHCl (VCM) + 2 HCl Overall reaction 2 CH 2 CH 2 + Cl 2 + ½ O 2 2 CH 2 CHCl + H 2 O Balanced Process for Vinyl Chloride Production •No generation of HCl •95% of the world’s VCM is produced utilizing the balanced process
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Heavy ends Oxy- chlorination Direct chlorination EDC purification EDC pyrolysis VCM purification HCl recycle Air or O 2 Ethylene Cl 2 Light ends EDC recycle VCM Balanced Process for Vinyl Chloride Production
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Direct Chlorination and Oxychlorination P&ID DC REACTOR OXY REACTOR CAUSTIC SCRUBBERS
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Vinyl Chloride Plant Reactor Design •Theoretical reactor design equations •Literature kinetic data used to calculated rate constants •Numerical Integration used to calculated specified parameters
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Reactor Design 4 2 t k k d w dz dF π = F k = molar flow rate z = tube length d t = tube diameter w k = ν i r i r i = k f [C k ]-k r [C k ]
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Oxychlorination Chemistry CuO + 2HCl CuCl 2 + H 2 O CuCl 2 regeneration R-5 2CuCl + 0.5O 2 CuO-CuCl 2 CuO + CuCl 2 CuCl oxidation R-4 C 2 H 4 + 3O 2 2CO 2 + 2H 2 O C 2 H 4 combustion R-3 C 2 H 4 + 3CuCl 2 C 2 H 4 Cl 3 + 3CuCl +0.5H 2 TCE formation R-2 C 2 H 4 + 2CuCl 2 C 2 H 4 Cl 2 + 2CuCl DCE formation R-1 Stoichiometry Reaction Set •Plus nine other main by product formation reactions •Excel Reactor Model of Oxychlorination
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Oxy Reactor Effluent Flow Rates (lb-mol/hr) 0.10 Dichloromethane 0.13 Acetylene 0.09 Vinyl Acetylene 0.015 HCl 0.10 Chloroprene 2.76 Oxygen 0.11 Chloroethane 5.5 Ethylene 0.11 Chloroform 140 CO 2 0.12 Methyl Chloride 1.26 TEC 1.25 CCl 4 1341 Water 0.25 Chloral 1341 EDC Oxychlorination Reactor Results
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Oxychlorination Reactor Parameters 0.05 Residence Time (hr) 1320 Tube Length (ft) 2 Tube Diameter (in) 461 Reactor Volume (ft 3 ) 58 Reactor Pressure (psig) 305 Reactor Temperature ( o C)
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DC Reactor Modeling Results 99.4% 99.8% Selectivity to EDC 99.94% 99.93% Conversion of ethylene Literature Values Modeling Results 0.018 Residence Time (hr) 115 Tube Length (ft) 2 Tube Diameter (in) 90 Reactor Volume (ft 3 ) 15 Reactor Pressure (psig) 120 Reactor Temperature ( o C) DC Reactor Parameters DC Reactor Kinetic Results
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EDC Purification P&ID WATER WASH LIGHTS COLUMN HEAVIES COLUMN
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EDC Pyrolysis P&ID FURNACE FEED FLASH CRACKING FURNACE EFFLUENT QUENCH SECTION
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This note was uploaded on 08/31/2011 for the course CHE 4273 taught by Professor Staff during the Spring '10 term at Oklahoma State.

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VINYL CHLORIDE PRODUCTION-POWERPOINT - Vinyl Chloride...

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