DESULFURIZATION OF WASTE ENGINE OIL ASSISTED BY LOW-RANK COAL AS ACTIVATED CARBON USING PYROLYSIS DISTILLATION METHOD
Waste engine oil is a component that is harmful to the environment. One of the dangerous components of waste engine oil is sulfur content. One way to recycle waste engine oil is to convert waste engine oil into alternative liquid fuels such as diesel. The pyrolysis distillation process assisted by activated carbon from low-rank coal as an adsorbent is expected to provide a solution for recycling waste engine oil into a base fuel like diesel. Low-rank coal has less economic value, therefore it needs to be utilized to produce a more economically valuable product, namely activated carbon. In this study, activated carbon can act as a sulfur-absorbing medium and increase pyrolysis conversion. Based on the research conducted, the adsorption capacity based on the iodine number parameter before activation was 103.145 mg/g and increased after activation to 1163.513 mg/g. The pyrolysis distillation process was carried out at various temperatures of 3000C – 5000C by adding 10% coal-activated carbon from engine oil waste. The best pyrolysis conditions were obtained at 3500C with a yield content of 75% and a percent sulfur removal of 73%. The use of activated carbon from low-rank coal has a very significant impact on increasing the amount of yield and maximum sulfur removal compared to without the assisted by coal activated carbon.
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