Abstract
Response surface methodology (RSM) was used to optimize the process for catalytic pyrolysis of waste high-density polyethylene to liquid fuel over modified catalyst. The reaction temperature, acidity of the modified catalysts and mass ratio between modified catalysts to waste high-density polyethylene (HDPE) were chosen as independent variables. Face centered central composite (FCCD) design of experiment has been used. Optimum operating conditions of reaction temperature (450°C), acidity of catalyst (0.341) and catalyst to waste HDPE ratio (1:4) were produced the maximum liquid product yield of 78.7%. The quadratic model obtained fits well to predict the response with a high determination coefficient of R2 (0.995). The liquid fuel obtained by catalytic pyrolysis of waste HDPE at optimized condition consists of petroleum products range hydrocarbons (C10–C25) with high heating value (40.17MJ/kg).
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