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Plastic Pyrolysis

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on 16 June 2015

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Transcript of Plastic Pyrolysis

Recycling Mixed Plastic Waste
Incineration
Research Aims
Ascend Plastic Waste Hierarchy
Polymers difficult to sort
NIR 67% Recovery Rate
Plastic Waste Hierarchy
Primary
9.6 Million Tonnes Landfilled in Europe
UK 69% Landfilled
Source: PlasticsEurope
33% Remaining
Source: Foster (2008)
Higher Global Warming Potential
Secondary
Tertiary
Quaternary
Pyrolysis Wax Plaxx
Best Environmental & Comercial Outlet
Plaxx
Unique Selling Proposition
Pyrolysis in:
New York (JBI Ltd.)
Sapporo, Japan (Klean Industries Inc.)
Recycling Technologies Ltd.
Uncontrolled Feedstock
Distillation Curve
Categorisation
Vacuum Yields
2. Solid Fuel
1. Synthetic Crude Oil
3. Slack Wax & Distillate
0.029% Sulphur
852 kg/m3
Properties
65°C Melting Point
28.8% Oil Content
12.9 Watson K
£194.50/tonne
WCS
Heavy Benchmark
Thermal Cracking
Initial base case
CHP
Value proposition
Slack wax
£292.39/tonne
Op cost £27/tonne
EBITDA
£265.39/tonne
Avg 20,000 barrels
2322 tonnes Plaxx
Currently ~ 1000 tonnes/yr
Tertiary Product
Green
Credentials
Possible with aggregation
Plaxx resembles a crudely or
partially refined crude oil.
Neither a traditional fuel nor a crude oil,
but a hybrid of the two,
whilst being a solid wax compound.
Plaxx
Requires heating
Ships
Generators
Power Plants
Restricted to
Equivalent
Heavy
Residual
Fuel Oil
Cheapest
£200 - 300/tonne
Outlets
Regulation 14
Sulphur content
must not exceed 0.10 wt.%
as of 1st January 2015
within Emission Control Areas
Plaxx £410.67/tonne as Marine Fuel
EBITDA £383.67/tonne
Tertiary Product
Marine Fuel as Base Case
Lubricating oil refining derivative
10 - 25% oil content
(Yorke, et al., 1983)
Differing in densities & oil content
Slack wax
Flash Point
Deoiling
Column Distillation
Max
8 stages
69.17 wt.%
Optimum
67.76 wt.%
Red Diesel
Fuel Gas Equivalent
Costings
Red Diesel
Or
Natural Gas?
Slack Wax
Or
Marine Fuel?
1,285% IRR
Plaxx as slack wax and red diesel is environmentally and financially superior.
Plaxx as marine fuel is still a viable contingency.
Any Questions?
Stable at £838-910/tonne
Secondary product
1. Wax sweating process
2. Recrystallization process
3. Warm-up deoiling process
4. Spray deoiling process
5. Flash separation
6. Distillation column separation

385°C D86 10 vol.%
58.2 wt.% slack wax
19.91%
28.44%
Methods
Flowrate 105.47 kg/h
650°C
200°C
ChemCAD/HYSYS
pseudocomponents
Limitations
C36H74 largest hydrocarbon
Diversity decreases C26 onwards
Larger molecule less intermolecular interactions
Lack of chemical properties
Source: Shonfield (2008)
Incorrect flash point predictions
Crude Oil Cuts
Full transcript