Research Article
Catalytic Pyrolysis of Plastic Waste to Liquid Fuel Using Local Clay Catalyst
Table 1
Independent variables and their levels in CCD.
| Independent variables | Codes | Variable levels | | -1 | 0 | 1 | |
| Temperature, °C | X1 | 158.6 | 200 | 300 | 400 | 441.4 | Catalyst conc, mass % | X2 | 2.93 | 5 | 10 | 15 | 17.07 |
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