You missed the words, "For comparison". It's always wise to review the available literature to check for prior art, intellectual property etc.
You are quoting the Islechem report which used a clean polyolefinic thermoplastic feedstock.
When you have a feedstock composed of "post consumer dirty smelly plastic that would normally wind up in a landfill.." you will get nowhere near those results.
Garbage in, garbage out.
For comparison -
The Production of Light & Medium Oil and Electricity From Waste Plastic
Market Data 
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