Abstract

In this work, pyrolysis experiments were carried out in a stainless steel semi-batch reactor to produce a diesel-like fuel from waste polypropylene (PP). Aiming to maximize the liquid oil yield, the optimal reactor operating conditions (e. g. heating rate, batch time, degradation temperature, and N₂ flow rate) was obtained by the investigation of the thermal behavior of the waste PP using Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA). The waste PP pyrolysis oil was successfully purified by adsorption onto activated carbon, resulting in a colorant removal percentage of 49.56% as well as in the removal of the particle matter. The functional groups of purified waste PP pyrolysis oil (PWPO) and the Brazilian commercial S-10 diesel fuel were obtained and compared using Fourier Transform Infrared Spectroscopy (FTIR) and Gas Chromatography Coupled to Mass Spectrometry (GC-MS). According to the experimental results, the proposed thermal pyrolysis process has shown a very high liquid oil yield of about 94 wt%, and fuel heavy and light hydrocarbons were identified in PWPO. It was observed that PWPO has physico-chemistry properties similar to those of commercial S-10 diesel fuel, enhancing the high lower heating value (LHV) of about 43.06 MJ/kg. The work findings pointed out the synthetic diesel-like fuel as a promising alternative for cycle diesel engines, dropping the use of fossil fuels without reducing energy efficiency.

摘要

在这项工作中，在不锈钢半间歇式反应器中进行了热解实验，以利用废聚丙烯 (PP) 生产类似柴油的燃料。旨在最大限度地提高液体油产量，优化反应器操作条件（例如加热速率、分批时间、降解温度和 N ₂通过使用差示扫描量热法 (DSC) 和热重分析 (TGA) 研究废 PP 的热行为获得流量）。废PP裂解油通过活性炭吸附成功纯化，着色剂去除率达到49.56%，颗粒物去除。使用傅里叶变换红外光谱 (FTIR) 和气相色谱耦合质谱 (GC-MS) 获得纯化的废 PP 裂解油 (PWPO) 和巴西商业 S-10 柴油的官能团并进行比较。根据实验结果，所提出的热裂解工艺显示出非常高的液态油产率，约为 94 wt%，并且在 PWPO 中鉴定出燃料重质和轻质烃。据观察，PWPO 具有与商业 S-10 柴油相似的物理化学特性，提高了约 43.06 MJ/kg 的高低热值 (LHV)。研究结果指出，合成类柴油燃料是循环柴油发动机的一种有前途的替代品，在不降低能源效率的情况下减少了化石燃料的使用。