ENCH 4300—Capstone UT Chattanooga August 14, 2014 Advisor: Dr. Jim Henry Jordan Buecker
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Carpet Waste Carpet Waste Gasification: Gasification: Technical, Economic, Environmental Assessment for Carpet Mills An Interim Presentation
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Carpet Waste Gasification: Technical, Economic, Environmental Assessment for Carpet Mills An Interim Presentation. ENCH 4300—Capstone UT Chattanooga August 14, 2014 Advisor: Dr. Jim Henry Jordan Buecker Christopher Burns Katharine Davis Hemali Dholakia Kevin O’Brien. Outline. - PowerPoint PPT Presentation
Transcript of ENCH 4300—Capstone UT Chattanooga August 14, 2014 Advisor: Dr. Jim Henry Jordan Buecker
Carpet Waste Gasification:Carpet Waste Gasification:Technical, Economic,
Environmental Assessment for Carpet
MillsAn Interim Presentation
OutlineOutline• Problem Statement• Principle of Gasification• Methodology• Proposed Systems• Syngas Uses• Environmental Analysis• Economics• Conclusions
Problem StatementProblem Statement• 250 tons per day of post-consumer
carpet (PCC)
• Currently pay disposal fees
• Reclaim a portion of the chemical energy from the PCC
Problem StatementProblem Statement• PCC has lower heating value of 8,800
Btu/lbo Bituminous coal LHV = 11,000 Btu/lbo Natural gas LHV = 20,000 Btu/lb
• Gasification Processes PCC consideredo Produce syngas
• Syngas LHV = 8,000-12,000 Btu/lb
Principle of Principle of GasificationGasification
MethodologyMethodology• 250 tons/day of post consumer
carpet• Carpet composition (wt%)Component Percentage of
Carpet (wt%)Percentage
removed pre-gasification (wt%)
Polypropylene (PP) 17Calcium Carbonate
(CaCO3)35 80
Polyethylene Terephtalate (PET)
6
Nylon 6 (N 6) 17 100Nylon 6,6 (N 6,6) 14
Styrene Butadiene Rubber (SBR)
11
MethodologyMethodologyMaterial Heat of
Combustion (BTU/lb)
Flowrate (lb/hr)
MMBTU/hr
PP -18600 1700 -32CaCO3 800 700 0.6PET -9500 630 -6SBR -18900 1100 -21N66 -13800 1400 -19
Total 79 MM BTU/hr
MethodologyMethodology• Employed ChemCad modeling
software
• Material balance
• Energy balance
Proposed SystemsProposed SystemsAir GasifierAir Gasifier
Proposed SystemsProposed SystemsAir GasifierAir Gasifier
•N2 presence reduces heating value•Produces NOx
Proposed SystemsProposed SystemsOO22 Gasifier Gasifier
Proposed SystemsProposed SystemsOO22 Gasifier Gasifier
• Capital increase due to N2 separation
• Capital decrease due to volumetric flow from the gasifier
Proposed SystemsProposed SystemsSteam GasifierSteam Gasifier
Proposed SystemsProposed SystemsSteam GasifierSteam Gasifier
• Lower Temperature• Produces CH4 (higher heating
value syngas)
Current Syngas UseCurrent Syngas Use
BoilerSyngas
AirSteam
Exhaust
Plant Use
Current Syngas UseCurrent Syngas Use
Potential Syngas UsePotential Syngas Use
BoilerSynga
s
AirHigh Pressure Steam
Low Pressure Steam
Condensate
Exhaust
Condenser
Potential Syngas UsePotential Syngas Use
Gas Turbine
Boiler
Syngas
AirWork
Hot Exhaust
Low Temp Exhaust
High Pressure Steam
Work
Energy RecoveryEnergy Recovery
GasifierMM
BTU/hBTU/lb PCCW
Air 58 5800O2 58 5800
Steam 35 3500
PollutantsPollutants
Gasifier lb/h CO2
lb CO2/MM
BTUCoal
compare lb/h NOxCoal
compareAir 14000 240 13% 300 -14%O2 14000 240 13% negligible
Steam 11000 310 48% negligible
Interim ConclusionsInterim Conclusions• Technologically and
Environmentally Feasible
• Economic Analysis will be performed
Questions We HaveQuestions We Have• What were the strong points?
• What can be improved upon?
• What can be omitted?
